=== src/third_party/fmt/fmt/*.h and src/third_party/fmt/fmt/format.cc
-This is a subset of https://fmt.dev[fmt] 10.2.1 with the following license:
+This is a subset of https://fmt.dev[fmt] 11.1.4 with the following license:
----
Formatting library for C++
-Copyright (c) 2012 - present, Victor Zverovich
+Copyright (c) 2012 - present, Victor Zverovich and {fmt} contributors
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
-register_dependency(Fmt BUNDLED 10.2.1)
+register_dependency(Fmt BUNDLED 11.1.4)
add_library(dep_fmt STATIC fmt/format.cc)
target_include_directories(dep_fmt SYSTEM PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}")
--- /dev/null
+// Formatting library for C++ - the base API for char/UTF-8
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_BASE_H_
+#define FMT_BASE_H_
+
+#if defined(FMT_IMPORT_STD) && !defined(FMT_MODULE)
+# define FMT_MODULE
+#endif
+
+#ifndef FMT_MODULE
+# include <limits.h> // CHAR_BIT
+# include <stdio.h> // FILE
+# include <string.h> // memcmp
+
+# include <type_traits> // std::enable_if
+#endif
+
+// The fmt library version in the form major * 10000 + minor * 100 + patch.
+#define FMT_VERSION 110104
+
+// Detect compiler versions.
+#if defined(__clang__) && !defined(__ibmxl__)
+# define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__)
+#else
+# define FMT_CLANG_VERSION 0
+#endif
+#if defined(__GNUC__) && !defined(__clang__) && !defined(__INTEL_COMPILER)
+# define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
+#else
+# define FMT_GCC_VERSION 0
+#endif
+#if defined(__ICL)
+# define FMT_ICC_VERSION __ICL
+#elif defined(__INTEL_COMPILER)
+# define FMT_ICC_VERSION __INTEL_COMPILER
+#else
+# define FMT_ICC_VERSION 0
+#endif
+#if defined(_MSC_VER)
+# define FMT_MSC_VERSION _MSC_VER
+#else
+# define FMT_MSC_VERSION 0
+#endif
+
+// Detect standard library versions.
+#ifdef _GLIBCXX_RELEASE
+# define FMT_GLIBCXX_RELEASE _GLIBCXX_RELEASE
+#else
+# define FMT_GLIBCXX_RELEASE 0
+#endif
+#ifdef _LIBCPP_VERSION
+# define FMT_LIBCPP_VERSION _LIBCPP_VERSION
+#else
+# define FMT_LIBCPP_VERSION 0
+#endif
+
+#ifdef _MSVC_LANG
+# define FMT_CPLUSPLUS _MSVC_LANG
+#else
+# define FMT_CPLUSPLUS __cplusplus
+#endif
+
+// Detect __has_*.
+#ifdef __has_feature
+# define FMT_HAS_FEATURE(x) __has_feature(x)
+#else
+# define FMT_HAS_FEATURE(x) 0
+#endif
+#ifdef __has_include
+# define FMT_HAS_INCLUDE(x) __has_include(x)
+#else
+# define FMT_HAS_INCLUDE(x) 0
+#endif
+#ifdef __has_builtin
+# define FMT_HAS_BUILTIN(x) __has_builtin(x)
+#else
+# define FMT_HAS_BUILTIN(x) 0
+#endif
+#ifdef __has_cpp_attribute
+# define FMT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
+#else
+# define FMT_HAS_CPP_ATTRIBUTE(x) 0
+#endif
+
+#define FMT_HAS_CPP14_ATTRIBUTE(attribute) \
+ (FMT_CPLUSPLUS >= 201402L && FMT_HAS_CPP_ATTRIBUTE(attribute))
+
+#define FMT_HAS_CPP17_ATTRIBUTE(attribute) \
+ (FMT_CPLUSPLUS >= 201703L && FMT_HAS_CPP_ATTRIBUTE(attribute))
+
+// Detect C++14 relaxed constexpr.
+#ifdef FMT_USE_CONSTEXPR
+// Use the provided definition.
+#elif FMT_GCC_VERSION >= 702 && FMT_CPLUSPLUS >= 201402L
+// GCC only allows constexpr member functions in non-literal types since 7.2:
+// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66297.
+# define FMT_USE_CONSTEXPR 1
+#elif FMT_ICC_VERSION
+# define FMT_USE_CONSTEXPR 0 // https://github.com/fmtlib/fmt/issues/1628
+#elif FMT_HAS_FEATURE(cxx_relaxed_constexpr) || FMT_MSC_VERSION >= 1912
+# define FMT_USE_CONSTEXPR 1
+#else
+# define FMT_USE_CONSTEXPR 0
+#endif
+#if FMT_USE_CONSTEXPR
+# define FMT_CONSTEXPR constexpr
+#else
+# define FMT_CONSTEXPR
+#endif
+
+// Detect consteval, C++20 constexpr extensions and std::is_constant_evaluated.
+#if !defined(__cpp_lib_is_constant_evaluated)
+# define FMT_USE_CONSTEVAL 0
+#elif FMT_CPLUSPLUS < 201709L
+# define FMT_USE_CONSTEVAL 0
+#elif FMT_GLIBCXX_RELEASE && FMT_GLIBCXX_RELEASE < 10
+# define FMT_USE_CONSTEVAL 0
+#elif FMT_LIBCPP_VERSION && FMT_LIBCPP_VERSION < 10000
+# define FMT_USE_CONSTEVAL 0
+#elif defined(__apple_build_version__) && __apple_build_version__ < 14000029L
+# define FMT_USE_CONSTEVAL 0 // consteval is broken in Apple clang < 14.
+#elif FMT_MSC_VERSION && FMT_MSC_VERSION < 1929
+# define FMT_USE_CONSTEVAL 0 // consteval is broken in MSVC VS2019 < 16.10.
+#elif defined(__cpp_consteval)
+# define FMT_USE_CONSTEVAL 1
+#elif FMT_GCC_VERSION >= 1002 || FMT_CLANG_VERSION >= 1101
+# define FMT_USE_CONSTEVAL 1
+#else
+# define FMT_USE_CONSTEVAL 0
+#endif
+#if FMT_USE_CONSTEVAL
+# define FMT_CONSTEVAL consteval
+# define FMT_CONSTEXPR20 constexpr
+#else
+# define FMT_CONSTEVAL
+# define FMT_CONSTEXPR20
+#endif
+
+// Check if exceptions are disabled.
+#ifdef FMT_USE_EXCEPTIONS
+// Use the provided definition.
+#elif defined(__GNUC__) && !defined(__EXCEPTIONS)
+# define FMT_USE_EXCEPTIONS 0
+#elif defined(__clang__) && !defined(__cpp_exceptions)
+# define FMT_USE_EXCEPTIONS 0
+#elif FMT_MSC_VERSION && !_HAS_EXCEPTIONS
+# define FMT_USE_EXCEPTIONS 0
+#else
+# define FMT_USE_EXCEPTIONS 1
+#endif
+#if FMT_USE_EXCEPTIONS
+# define FMT_TRY try
+# define FMT_CATCH(x) catch (x)
+#else
+# define FMT_TRY if (true)
+# define FMT_CATCH(x) if (false)
+#endif
+
+#ifdef FMT_NO_UNIQUE_ADDRESS
+// Use the provided definition.
+#elif FMT_CPLUSPLUS < 202002L
+// Not supported.
+#elif FMT_HAS_CPP_ATTRIBUTE(no_unique_address)
+# define FMT_NO_UNIQUE_ADDRESS [[no_unique_address]]
+// VS2019 v16.10 and later except clang-cl (https://reviews.llvm.org/D110485).
+#elif FMT_MSC_VERSION >= 1929 && !FMT_CLANG_VERSION
+# define FMT_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]]
+#endif
+#ifndef FMT_NO_UNIQUE_ADDRESS
+# define FMT_NO_UNIQUE_ADDRESS
+#endif
+
+#if FMT_HAS_CPP17_ATTRIBUTE(fallthrough)
+# define FMT_FALLTHROUGH [[fallthrough]]
+#elif defined(__clang__)
+# define FMT_FALLTHROUGH [[clang::fallthrough]]
+#elif FMT_GCC_VERSION >= 700 && \
+ (!defined(__EDG_VERSION__) || __EDG_VERSION__ >= 520)
+# define FMT_FALLTHROUGH [[gnu::fallthrough]]
+#else
+# define FMT_FALLTHROUGH
+#endif
+
+// Disable [[noreturn]] on MSVC/NVCC because of bogus unreachable code warnings.
+#if FMT_HAS_CPP_ATTRIBUTE(noreturn) && !FMT_MSC_VERSION && !defined(__NVCC__)
+# define FMT_NORETURN [[noreturn]]
+#else
+# define FMT_NORETURN
+#endif
+
+#ifdef FMT_NODISCARD
+// Use the provided definition.
+#elif FMT_HAS_CPP17_ATTRIBUTE(nodiscard)
+# define FMT_NODISCARD [[nodiscard]]
+#else
+# define FMT_NODISCARD
+#endif
+
+#ifdef FMT_DEPRECATED
+// Use the provided definition.
+#elif FMT_HAS_CPP14_ATTRIBUTE(deprecated)
+# define FMT_DEPRECATED [[deprecated]]
+#else
+# define FMT_DEPRECATED /* deprecated */
+#endif
+
+#ifdef FMT_ALWAYS_INLINE
+// Use the provided definition.
+#elif FMT_GCC_VERSION || FMT_CLANG_VERSION
+# define FMT_ALWAYS_INLINE inline __attribute__((always_inline))
+#else
+# define FMT_ALWAYS_INLINE inline
+#endif
+// A version of FMT_ALWAYS_INLINE to prevent code bloat in debug mode.
+#ifdef NDEBUG
+# define FMT_INLINE FMT_ALWAYS_INLINE
+#else
+# define FMT_INLINE inline
+#endif
+
+#if FMT_GCC_VERSION || FMT_CLANG_VERSION
+# define FMT_VISIBILITY(value) __attribute__((visibility(value)))
+#else
+# define FMT_VISIBILITY(value)
+#endif
+
+// Detect pragmas.
+#define FMT_PRAGMA_IMPL(x) _Pragma(#x)
+#if FMT_GCC_VERSION >= 504 && !defined(__NVCOMPILER)
+// Workaround a _Pragma bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59884
+// and an nvhpc warning: https://github.com/fmtlib/fmt/pull/2582.
+# define FMT_PRAGMA_GCC(x) FMT_PRAGMA_IMPL(GCC x)
+#else
+# define FMT_PRAGMA_GCC(x)
+#endif
+#if FMT_CLANG_VERSION
+# define FMT_PRAGMA_CLANG(x) FMT_PRAGMA_IMPL(clang x)
+#else
+# define FMT_PRAGMA_CLANG(x)
+#endif
+#if FMT_MSC_VERSION
+# define FMT_MSC_WARNING(...) __pragma(warning(__VA_ARGS__))
+#else
+# define FMT_MSC_WARNING(...)
+#endif
+
+#ifndef FMT_BEGIN_NAMESPACE
+# define FMT_BEGIN_NAMESPACE \
+ namespace fmt { \
+ inline namespace v11 {
+# define FMT_END_NAMESPACE \
+ } \
+ }
+#endif
+
+#ifndef FMT_EXPORT
+# define FMT_EXPORT
+# define FMT_BEGIN_EXPORT
+# define FMT_END_EXPORT
+#endif
+
+#ifdef _WIN32
+# define FMT_WIN32 1
+#else
+# define FMT_WIN32 0
+#endif
+
+#if !defined(FMT_HEADER_ONLY) && FMT_WIN32
+# if defined(FMT_LIB_EXPORT)
+# define FMT_API __declspec(dllexport)
+# elif defined(FMT_SHARED)
+# define FMT_API __declspec(dllimport)
+# endif
+#elif defined(FMT_LIB_EXPORT) || defined(FMT_SHARED)
+# define FMT_API FMT_VISIBILITY("default")
+#endif
+#ifndef FMT_API
+# define FMT_API
+#endif
+
+#ifndef FMT_OPTIMIZE_SIZE
+# define FMT_OPTIMIZE_SIZE 0
+#endif
+
+// FMT_BUILTIN_TYPE=0 may result in smaller library size at the cost of higher
+// per-call binary size by passing built-in types through the extension API.
+#ifndef FMT_BUILTIN_TYPES
+# define FMT_BUILTIN_TYPES 1
+#endif
+
+#define FMT_APPLY_VARIADIC(expr) \
+ using unused = int[]; \
+ (void)unused { 0, (expr, 0)... }
+
+// Enable minimal optimizations for more compact code in debug mode.
+FMT_PRAGMA_GCC(push_options)
+#if !defined(__OPTIMIZE__) && !defined(__CUDACC__) && !defined(FMT_MODULE)
+FMT_PRAGMA_GCC(optimize("Og"))
+#endif
+FMT_PRAGMA_CLANG(diagnostic push)
+
+FMT_BEGIN_NAMESPACE
+
+// Implementations of enable_if_t and other metafunctions for older systems.
+template <bool B, typename T = void>
+using enable_if_t = typename std::enable_if<B, T>::type;
+template <bool B, typename T, typename F>
+using conditional_t = typename std::conditional<B, T, F>::type;
+template <bool B> using bool_constant = std::integral_constant<bool, B>;
+template <typename T>
+using remove_reference_t = typename std::remove_reference<T>::type;
+template <typename T>
+using remove_const_t = typename std::remove_const<T>::type;
+template <typename T>
+using remove_cvref_t = typename std::remove_cv<remove_reference_t<T>>::type;
+template <typename T>
+using make_unsigned_t = typename std::make_unsigned<T>::type;
+template <typename T>
+using underlying_t = typename std::underlying_type<T>::type;
+template <typename T> using decay_t = typename std::decay<T>::type;
+using nullptr_t = decltype(nullptr);
+
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 500
+// A workaround for gcc 4.9 to make void_t work in a SFINAE context.
+template <typename...> struct void_t_impl {
+ using type = void;
+};
+template <typename... T> using void_t = typename void_t_impl<T...>::type;
+#else
+template <typename...> using void_t = void;
+#endif
+
+struct monostate {
+ constexpr monostate() {}
+};
+
+// An enable_if helper to be used in template parameters which results in much
+// shorter symbols: https://godbolt.org/z/sWw4vP. Extra parentheses are needed
+// to workaround a bug in MSVC 2019 (see #1140 and #1186).
+#ifdef FMT_DOC
+# define FMT_ENABLE_IF(...)
+#else
+# define FMT_ENABLE_IF(...) fmt::enable_if_t<(__VA_ARGS__), int> = 0
+#endif
+
+template <typename T> constexpr auto min_of(T a, T b) -> T {
+ return a < b ? a : b;
+}
+template <typename T> constexpr auto max_of(T a, T b) -> T {
+ return a > b ? a : b;
+}
+
+namespace detail {
+// Suppresses "unused variable" warnings with the method described in
+// https://herbsutter.com/2009/10/18/mailbag-shutting-up-compiler-warnings/.
+// (void)var does not work on many Intel compilers.
+template <typename... T> FMT_CONSTEXPR void ignore_unused(const T&...) {}
+
+constexpr auto is_constant_evaluated(bool default_value = false) noexcept
+ -> bool {
+// Workaround for incompatibility between clang 14 and libstdc++ consteval-based
+// std::is_constant_evaluated: https://github.com/fmtlib/fmt/issues/3247.
+#if FMT_CPLUSPLUS >= 202002L && FMT_GLIBCXX_RELEASE >= 12 && \
+ (FMT_CLANG_VERSION >= 1400 && FMT_CLANG_VERSION < 1500)
+ ignore_unused(default_value);
+ return __builtin_is_constant_evaluated();
+#elif defined(__cpp_lib_is_constant_evaluated)
+ ignore_unused(default_value);
+ return std::is_constant_evaluated();
+#else
+ return default_value;
+#endif
+}
+
+// Suppresses "conditional expression is constant" warnings.
+template <typename T> FMT_ALWAYS_INLINE constexpr auto const_check(T val) -> T {
+ return val;
+}
+
+FMT_NORETURN FMT_API void assert_fail(const char* file, int line,
+ const char* message);
+
+#if defined(FMT_ASSERT)
+// Use the provided definition.
+#elif defined(NDEBUG)
+// FMT_ASSERT is not empty to avoid -Wempty-body.
+# define FMT_ASSERT(condition, message) \
+ fmt::detail::ignore_unused((condition), (message))
+#else
+# define FMT_ASSERT(condition, message) \
+ ((condition) /* void() fails with -Winvalid-constexpr on clang 4.0.1 */ \
+ ? (void)0 \
+ : fmt::detail::assert_fail(__FILE__, __LINE__, (message)))
+#endif
+
+#ifdef FMT_USE_INT128
+// Use the provided definition.
+#elif defined(__SIZEOF_INT128__) && !defined(__NVCC__) && \
+ !(FMT_CLANG_VERSION && FMT_MSC_VERSION)
+# define FMT_USE_INT128 1
+using int128_opt = __int128_t; // An optional native 128-bit integer.
+using uint128_opt = __uint128_t;
+inline auto map(int128_opt x) -> int128_opt { return x; }
+inline auto map(uint128_opt x) -> uint128_opt { return x; }
+#else
+# define FMT_USE_INT128 0
+#endif
+#if !FMT_USE_INT128
+enum class int128_opt {};
+enum class uint128_opt {};
+// Reduce template instantiations.
+inline auto map(int128_opt) -> monostate { return {}; }
+inline auto map(uint128_opt) -> monostate { return {}; }
+#endif
+
+#ifndef FMT_USE_BITINT
+# define FMT_USE_BITINT (FMT_CLANG_VERSION >= 1500)
+#endif
+
+#if FMT_USE_BITINT
+FMT_PRAGMA_CLANG(diagnostic ignored "-Wbit-int-extension")
+template <int N> using bitint = _BitInt(N);
+template <int N> using ubitint = unsigned _BitInt(N);
+#else
+template <int N> struct bitint {};
+template <int N> struct ubitint {};
+#endif // FMT_USE_BITINT
+
+// Casts a nonnegative integer to unsigned.
+template <typename Int>
+FMT_CONSTEXPR auto to_unsigned(Int value) -> make_unsigned_t<Int> {
+ FMT_ASSERT(std::is_unsigned<Int>::value || value >= 0, "negative value");
+ return static_cast<make_unsigned_t<Int>>(value);
+}
+
+template <typename Char>
+using unsigned_char = conditional_t<sizeof(Char) == 1, unsigned char, unsigned>;
+
+// A heuristic to detect std::string and std::[experimental::]string_view.
+// It is mainly used to avoid dependency on <[experimental/]string_view>.
+template <typename T, typename Enable = void>
+struct is_std_string_like : std::false_type {};
+template <typename T>
+struct is_std_string_like<T, void_t<decltype(std::declval<T>().find_first_of(
+ typename T::value_type(), 0))>>
+ : std::is_convertible<decltype(std::declval<T>().data()),
+ const typename T::value_type*> {};
+
+// Check if the literal encoding is UTF-8.
+enum { is_utf8_enabled = "\u00A7"[1] == '\xA7' };
+enum { use_utf8 = !FMT_WIN32 || is_utf8_enabled };
+
+#ifndef FMT_UNICODE
+# define FMT_UNICODE 1
+#endif
+
+static_assert(!FMT_UNICODE || use_utf8,
+ "Unicode support requires compiling with /utf-8");
+
+template <typename T> constexpr const char* narrow(const T*) { return nullptr; }
+constexpr FMT_ALWAYS_INLINE const char* narrow(const char* s) { return s; }
+
+template <typename Char>
+FMT_CONSTEXPR auto compare(const Char* s1, const Char* s2, std::size_t n)
+ -> int {
+ if (!is_constant_evaluated() && sizeof(Char) == 1) return memcmp(s1, s2, n);
+ for (; n != 0; ++s1, ++s2, --n) {
+ if (*s1 < *s2) return -1;
+ if (*s1 > *s2) return 1;
+ }
+ return 0;
+}
+
+namespace adl {
+using namespace std;
+
+template <typename Container>
+auto invoke_back_inserter()
+ -> decltype(back_inserter(std::declval<Container&>()));
+} // namespace adl
+
+template <typename It, typename Enable = std::true_type>
+struct is_back_insert_iterator : std::false_type {};
+
+template <typename It>
+struct is_back_insert_iterator<
+ It, bool_constant<std::is_same<
+ decltype(adl::invoke_back_inserter<typename It::container_type>()),
+ It>::value>> : std::true_type {};
+
+// Extracts a reference to the container from *insert_iterator.
+template <typename OutputIt>
+inline FMT_CONSTEXPR20 auto get_container(OutputIt it) ->
+ typename OutputIt::container_type& {
+ struct accessor : OutputIt {
+ FMT_CONSTEXPR20 accessor(OutputIt base) : OutputIt(base) {}
+ using OutputIt::container;
+ };
+ return *accessor(it).container;
+}
+} // namespace detail
+
+// Parsing-related public API and forward declarations.
+FMT_BEGIN_EXPORT
+
+/**
+ * An implementation of `std::basic_string_view` for pre-C++17. It provides a
+ * subset of the API. `fmt::basic_string_view` is used for format strings even
+ * if `std::basic_string_view` is available to prevent issues when a library is
+ * compiled with a different `-std` option than the client code (which is not
+ * recommended).
+ */
+template <typename Char> class basic_string_view {
+ private:
+ const Char* data_;
+ size_t size_;
+
+ public:
+ using value_type = Char;
+ using iterator = const Char*;
+
+ constexpr basic_string_view() noexcept : data_(nullptr), size_(0) {}
+
+ /// Constructs a string reference object from a C string and a size.
+ constexpr basic_string_view(const Char* s, size_t count) noexcept
+ : data_(s), size_(count) {}
+
+ constexpr basic_string_view(nullptr_t) = delete;
+
+ /// Constructs a string reference object from a C string.
+#if FMT_GCC_VERSION
+ FMT_ALWAYS_INLINE
+#endif
+ FMT_CONSTEXPR20 basic_string_view(const Char* s) : data_(s) {
+#if FMT_HAS_BUILTIN(__builtin_strlen) || FMT_GCC_VERSION || FMT_CLANG_VERSION
+ if (std::is_same<Char, char>::value) {
+ size_ = __builtin_strlen(detail::narrow(s));
+ return;
+ }
+#endif
+ size_t len = 0;
+ while (*s++) ++len;
+ size_ = len;
+ }
+
+ /// Constructs a string reference from a `std::basic_string` or a
+ /// `std::basic_string_view` object.
+ template <typename S,
+ FMT_ENABLE_IF(detail::is_std_string_like<S>::value&& std::is_same<
+ typename S::value_type, Char>::value)>
+ FMT_CONSTEXPR basic_string_view(const S& s) noexcept
+ : data_(s.data()), size_(s.size()) {}
+
+ /// Returns a pointer to the string data.
+ constexpr auto data() const noexcept -> const Char* { return data_; }
+
+ /// Returns the string size.
+ constexpr auto size() const noexcept -> size_t { return size_; }
+
+ constexpr auto begin() const noexcept -> iterator { return data_; }
+ constexpr auto end() const noexcept -> iterator { return data_ + size_; }
+
+ constexpr auto operator[](size_t pos) const noexcept -> const Char& {
+ return data_[pos];
+ }
+
+ FMT_CONSTEXPR void remove_prefix(size_t n) noexcept {
+ data_ += n;
+ size_ -= n;
+ }
+
+ FMT_CONSTEXPR auto starts_with(basic_string_view<Char> sv) const noexcept
+ -> bool {
+ return size_ >= sv.size_ && detail::compare(data_, sv.data_, sv.size_) == 0;
+ }
+ FMT_CONSTEXPR auto starts_with(Char c) const noexcept -> bool {
+ return size_ >= 1 && *data_ == c;
+ }
+ FMT_CONSTEXPR auto starts_with(const Char* s) const -> bool {
+ return starts_with(basic_string_view<Char>(s));
+ }
+
+ // Lexicographically compare this string reference to other.
+ FMT_CONSTEXPR auto compare(basic_string_view other) const -> int {
+ int result =
+ detail::compare(data_, other.data_, min_of(size_, other.size_));
+ if (result != 0) return result;
+ return size_ == other.size_ ? 0 : (size_ < other.size_ ? -1 : 1);
+ }
+
+ FMT_CONSTEXPR friend auto operator==(basic_string_view lhs,
+ basic_string_view rhs) -> bool {
+ return lhs.compare(rhs) == 0;
+ }
+ friend auto operator!=(basic_string_view lhs, basic_string_view rhs) -> bool {
+ return lhs.compare(rhs) != 0;
+ }
+ friend auto operator<(basic_string_view lhs, basic_string_view rhs) -> bool {
+ return lhs.compare(rhs) < 0;
+ }
+ friend auto operator<=(basic_string_view lhs, basic_string_view rhs) -> bool {
+ return lhs.compare(rhs) <= 0;
+ }
+ friend auto operator>(basic_string_view lhs, basic_string_view rhs) -> bool {
+ return lhs.compare(rhs) > 0;
+ }
+ friend auto operator>=(basic_string_view lhs, basic_string_view rhs) -> bool {
+ return lhs.compare(rhs) >= 0;
+ }
+};
+
+using string_view = basic_string_view<char>;
+
+/// Specifies if `T` is an extended character type. Can be specialized by users.
+template <typename T> struct is_xchar : std::false_type {};
+template <> struct is_xchar<wchar_t> : std::true_type {};
+template <> struct is_xchar<char16_t> : std::true_type {};
+template <> struct is_xchar<char32_t> : std::true_type {};
+#ifdef __cpp_char8_t
+template <> struct is_xchar<char8_t> : std::true_type {};
+#endif
+
+// DEPRECATED! Will be replaced with an alias to prevent specializations.
+template <typename T> struct is_char : is_xchar<T> {};
+template <> struct is_char<char> : std::true_type {};
+
+template <typename T> class basic_appender;
+using appender = basic_appender<char>;
+
+// Checks whether T is a container with contiguous storage.
+template <typename T> struct is_contiguous : std::false_type {};
+
+class context;
+template <typename OutputIt, typename Char> class generic_context;
+template <typename Char> class parse_context;
+
+// Longer aliases for C++20 compatibility.
+template <typename Char> using basic_format_parse_context = parse_context<Char>;
+using format_parse_context = parse_context<char>;
+template <typename OutputIt, typename Char>
+using basic_format_context =
+ conditional_t<std::is_same<OutputIt, appender>::value, context,
+ generic_context<OutputIt, Char>>;
+using format_context = context;
+
+template <typename Char>
+using buffered_context =
+ conditional_t<std::is_same<Char, char>::value, context,
+ generic_context<basic_appender<Char>, Char>>;
+
+template <typename Context> class basic_format_arg;
+template <typename Context> class basic_format_args;
+
+// A separate type would result in shorter symbols but break ABI compatibility
+// between clang and gcc on ARM (#1919).
+using format_args = basic_format_args<context>;
+
+// A formatter for objects of type T.
+template <typename T, typename Char = char, typename Enable = void>
+struct formatter {
+ // A deleted default constructor indicates a disabled formatter.
+ formatter() = delete;
+};
+
+/// Reports a format error at compile time or, via a `format_error` exception,
+/// at runtime.
+// This function is intentionally not constexpr to give a compile-time error.
+FMT_NORETURN FMT_API void report_error(const char* message);
+
+enum class presentation_type : unsigned char {
+ // Common specifiers:
+ none = 0,
+ debug = 1, // '?'
+ string = 2, // 's' (string, bool)
+
+ // Integral, bool and character specifiers:
+ dec = 3, // 'd'
+ hex, // 'x' or 'X'
+ oct, // 'o'
+ bin, // 'b' or 'B'
+ chr, // 'c'
+
+ // String and pointer specifiers:
+ pointer = 3, // 'p'
+
+ // Floating-point specifiers:
+ exp = 1, // 'e' or 'E' (1 since there is no FP debug presentation)
+ fixed, // 'f' or 'F'
+ general, // 'g' or 'G'
+ hexfloat // 'a' or 'A'
+};
+
+enum class align { none, left, right, center, numeric };
+enum class sign { none, minus, plus, space };
+enum class arg_id_kind { none, index, name };
+
+// Basic format specifiers for built-in and string types.
+class basic_specs {
+ private:
+ // Data is arranged as follows:
+ //
+ // 0 1 2 3
+ // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ // |type |align| w | p | s |u|#|L| f | unused |
+ // +-----+-----+---+---+---+-+-+-+-----+---------------------------+
+ //
+ // w - dynamic width info
+ // p - dynamic precision info
+ // s - sign
+ // u - uppercase (e.g. 'X' for 'x')
+ // # - alternate form ('#')
+ // L - localized
+ // f - fill size
+ //
+ // Bitfields are not used because of compiler bugs such as gcc bug 61414.
+ enum : unsigned {
+ type_mask = 0x00007,
+ align_mask = 0x00038,
+ width_mask = 0x000C0,
+ precision_mask = 0x00300,
+ sign_mask = 0x00C00,
+ uppercase_mask = 0x01000,
+ alternate_mask = 0x02000,
+ localized_mask = 0x04000,
+ fill_size_mask = 0x38000,
+
+ align_shift = 3,
+ width_shift = 6,
+ precision_shift = 8,
+ sign_shift = 10,
+ fill_size_shift = 15,
+
+ max_fill_size = 4
+ };
+
+ unsigned data_ = 1 << fill_size_shift;
+ static_assert(sizeof(basic_specs::data_) * CHAR_BIT >= 18, "");
+
+ // Character (code unit) type is erased to prevent template bloat.
+ char fill_data_[max_fill_size] = {' '};
+
+ FMT_CONSTEXPR void set_fill_size(size_t size) {
+ data_ = (data_ & ~fill_size_mask) |
+ (static_cast<unsigned>(size) << fill_size_shift);
+ }
+
+ public:
+ constexpr auto type() const -> presentation_type {
+ return static_cast<presentation_type>(data_ & type_mask);
+ }
+ FMT_CONSTEXPR void set_type(presentation_type t) {
+ data_ = (data_ & ~type_mask) | static_cast<unsigned>(t);
+ }
+
+ constexpr auto align() const -> align {
+ return static_cast<fmt::align>((data_ & align_mask) >> align_shift);
+ }
+ FMT_CONSTEXPR void set_align(fmt::align a) {
+ data_ = (data_ & ~align_mask) | (static_cast<unsigned>(a) << align_shift);
+ }
+
+ constexpr auto dynamic_width() const -> arg_id_kind {
+ return static_cast<arg_id_kind>((data_ & width_mask) >> width_shift);
+ }
+ FMT_CONSTEXPR void set_dynamic_width(arg_id_kind w) {
+ data_ = (data_ & ~width_mask) | (static_cast<unsigned>(w) << width_shift);
+ }
+
+ FMT_CONSTEXPR auto dynamic_precision() const -> arg_id_kind {
+ return static_cast<arg_id_kind>((data_ & precision_mask) >>
+ precision_shift);
+ }
+ FMT_CONSTEXPR void set_dynamic_precision(arg_id_kind p) {
+ data_ = (data_ & ~precision_mask) |
+ (static_cast<unsigned>(p) << precision_shift);
+ }
+
+ constexpr bool dynamic() const {
+ return (data_ & (width_mask | precision_mask)) != 0;
+ }
+
+ constexpr auto sign() const -> sign {
+ return static_cast<fmt::sign>((data_ & sign_mask) >> sign_shift);
+ }
+ FMT_CONSTEXPR void set_sign(fmt::sign s) {
+ data_ = (data_ & ~sign_mask) | (static_cast<unsigned>(s) << sign_shift);
+ }
+
+ constexpr auto upper() const -> bool { return (data_ & uppercase_mask) != 0; }
+ FMT_CONSTEXPR void set_upper() { data_ |= uppercase_mask; }
+
+ constexpr auto alt() const -> bool { return (data_ & alternate_mask) != 0; }
+ FMT_CONSTEXPR void set_alt() { data_ |= alternate_mask; }
+ FMT_CONSTEXPR void clear_alt() { data_ &= ~alternate_mask; }
+
+ constexpr auto localized() const -> bool {
+ return (data_ & localized_mask) != 0;
+ }
+ FMT_CONSTEXPR void set_localized() { data_ |= localized_mask; }
+
+ constexpr auto fill_size() const -> size_t {
+ return (data_ & fill_size_mask) >> fill_size_shift;
+ }
+
+ template <typename Char, FMT_ENABLE_IF(std::is_same<Char, char>::value)>
+ constexpr auto fill() const -> const Char* {
+ return fill_data_;
+ }
+ template <typename Char, FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
+ constexpr auto fill() const -> const Char* {
+ return nullptr;
+ }
+
+ template <typename Char> constexpr auto fill_unit() const -> Char {
+ using uchar = unsigned char;
+ return static_cast<Char>(static_cast<uchar>(fill_data_[0]) |
+ (static_cast<uchar>(fill_data_[1]) << 8) |
+ (static_cast<uchar>(fill_data_[2]) << 16));
+ }
+
+ FMT_CONSTEXPR void set_fill(char c) {
+ fill_data_[0] = c;
+ set_fill_size(1);
+ }
+
+ template <typename Char>
+ FMT_CONSTEXPR void set_fill(basic_string_view<Char> s) {
+ auto size = s.size();
+ set_fill_size(size);
+ if (size == 1) {
+ unsigned uchar = static_cast<detail::unsigned_char<Char>>(s[0]);
+ fill_data_[0] = static_cast<char>(uchar);
+ fill_data_[1] = static_cast<char>(uchar >> 8);
+ fill_data_[2] = static_cast<char>(uchar >> 16);
+ return;
+ }
+ FMT_ASSERT(size <= max_fill_size, "invalid fill");
+ for (size_t i = 0; i < size; ++i)
+ fill_data_[i & 3] = static_cast<char>(s[i]);
+ }
+
+ FMT_CONSTEXPR void copy_fill_from(const basic_specs& specs) {
+ set_fill_size(specs.fill_size());
+ for (size_t i = 0; i < max_fill_size; ++i)
+ fill_data_[i] = specs.fill_data_[i];
+ }
+};
+
+// Format specifiers for built-in and string types.
+struct format_specs : basic_specs {
+ int width;
+ int precision;
+
+ constexpr format_specs() : width(0), precision(-1) {}
+};
+
+/**
+ * Parsing context consisting of a format string range being parsed and an
+ * argument counter for automatic indexing.
+ */
+template <typename Char = char> class parse_context {
+ private:
+ basic_string_view<Char> fmt_;
+ int next_arg_id_;
+
+ enum { use_constexpr_cast = !FMT_GCC_VERSION || FMT_GCC_VERSION >= 1200 };
+
+ FMT_CONSTEXPR void do_check_arg_id(int arg_id);
+
+ public:
+ using char_type = Char;
+ using iterator = const Char*;
+
+ constexpr explicit parse_context(basic_string_view<Char> fmt,
+ int next_arg_id = 0)
+ : fmt_(fmt), next_arg_id_(next_arg_id) {}
+
+ /// Returns an iterator to the beginning of the format string range being
+ /// parsed.
+ constexpr auto begin() const noexcept -> iterator { return fmt_.begin(); }
+
+ /// Returns an iterator past the end of the format string range being parsed.
+ constexpr auto end() const noexcept -> iterator { return fmt_.end(); }
+
+ /// Advances the begin iterator to `it`.
+ FMT_CONSTEXPR void advance_to(iterator it) {
+ fmt_.remove_prefix(detail::to_unsigned(it - begin()));
+ }
+
+ /// Reports an error if using the manual argument indexing; otherwise returns
+ /// the next argument index and switches to the automatic indexing.
+ FMT_CONSTEXPR auto next_arg_id() -> int {
+ if (next_arg_id_ < 0) {
+ report_error("cannot switch from manual to automatic argument indexing");
+ return 0;
+ }
+ int id = next_arg_id_++;
+ do_check_arg_id(id);
+ return id;
+ }
+
+ /// Reports an error if using the automatic argument indexing; otherwise
+ /// switches to the manual indexing.
+ FMT_CONSTEXPR void check_arg_id(int id) {
+ if (next_arg_id_ > 0) {
+ report_error("cannot switch from automatic to manual argument indexing");
+ return;
+ }
+ next_arg_id_ = -1;
+ do_check_arg_id(id);
+ }
+ FMT_CONSTEXPR void check_arg_id(basic_string_view<Char>) {
+ next_arg_id_ = -1;
+ }
+ FMT_CONSTEXPR void check_dynamic_spec(int arg_id);
+};
+
+FMT_END_EXPORT
+
+namespace detail {
+
+// Constructs fmt::basic_string_view<Char> from types implicitly convertible
+// to it, deducing Char. Explicitly convertible types such as the ones returned
+// from FMT_STRING are intentionally excluded.
+template <typename Char, FMT_ENABLE_IF(is_char<Char>::value)>
+constexpr auto to_string_view(const Char* s) -> basic_string_view<Char> {
+ return s;
+}
+template <typename T, FMT_ENABLE_IF(is_std_string_like<T>::value)>
+constexpr auto to_string_view(const T& s)
+ -> basic_string_view<typename T::value_type> {
+ return s;
+}
+template <typename Char>
+constexpr auto to_string_view(basic_string_view<Char> s)
+ -> basic_string_view<Char> {
+ return s;
+}
+
+template <typename T, typename Enable = void>
+struct has_to_string_view : std::false_type {};
+// detail:: is intentional since to_string_view is not an extension point.
+template <typename T>
+struct has_to_string_view<
+ T, void_t<decltype(detail::to_string_view(std::declval<T>()))>>
+ : std::true_type {};
+
+/// String's character (code unit) type. detail:: is intentional to prevent ADL.
+template <typename S,
+ typename V = decltype(detail::to_string_view(std::declval<S>()))>
+using char_t = typename V::value_type;
+
+enum class type {
+ none_type,
+ // Integer types should go first,
+ int_type,
+ uint_type,
+ long_long_type,
+ ulong_long_type,
+ int128_type,
+ uint128_type,
+ bool_type,
+ char_type,
+ last_integer_type = char_type,
+ // followed by floating-point types.
+ float_type,
+ double_type,
+ long_double_type,
+ last_numeric_type = long_double_type,
+ cstring_type,
+ string_type,
+ pointer_type,
+ custom_type
+};
+
+// Maps core type T to the corresponding type enum constant.
+template <typename T, typename Char>
+struct type_constant : std::integral_constant<type, type::custom_type> {};
+
+#define FMT_TYPE_CONSTANT(Type, constant) \
+ template <typename Char> \
+ struct type_constant<Type, Char> \
+ : std::integral_constant<type, type::constant> {}
+
+FMT_TYPE_CONSTANT(int, int_type);
+FMT_TYPE_CONSTANT(unsigned, uint_type);
+FMT_TYPE_CONSTANT(long long, long_long_type);
+FMT_TYPE_CONSTANT(unsigned long long, ulong_long_type);
+FMT_TYPE_CONSTANT(int128_opt, int128_type);
+FMT_TYPE_CONSTANT(uint128_opt, uint128_type);
+FMT_TYPE_CONSTANT(bool, bool_type);
+FMT_TYPE_CONSTANT(Char, char_type);
+FMT_TYPE_CONSTANT(float, float_type);
+FMT_TYPE_CONSTANT(double, double_type);
+FMT_TYPE_CONSTANT(long double, long_double_type);
+FMT_TYPE_CONSTANT(const Char*, cstring_type);
+FMT_TYPE_CONSTANT(basic_string_view<Char>, string_type);
+FMT_TYPE_CONSTANT(const void*, pointer_type);
+
+constexpr auto is_integral_type(type t) -> bool {
+ return t > type::none_type && t <= type::last_integer_type;
+}
+constexpr auto is_arithmetic_type(type t) -> bool {
+ return t > type::none_type && t <= type::last_numeric_type;
+}
+
+constexpr auto set(type rhs) -> int { return 1 << static_cast<int>(rhs); }
+constexpr auto in(type t, int set) -> bool {
+ return ((set >> static_cast<int>(t)) & 1) != 0;
+}
+
+// Bitsets of types.
+enum {
+ sint_set =
+ set(type::int_type) | set(type::long_long_type) | set(type::int128_type),
+ uint_set = set(type::uint_type) | set(type::ulong_long_type) |
+ set(type::uint128_type),
+ bool_set = set(type::bool_type),
+ char_set = set(type::char_type),
+ float_set = set(type::float_type) | set(type::double_type) |
+ set(type::long_double_type),
+ string_set = set(type::string_type),
+ cstring_set = set(type::cstring_type),
+ pointer_set = set(type::pointer_type)
+};
+
+struct view {};
+
+template <typename Char, typename T> struct named_arg;
+template <typename T> struct is_named_arg : std::false_type {};
+template <typename T> struct is_static_named_arg : std::false_type {};
+
+template <typename Char, typename T>
+struct is_named_arg<named_arg<Char, T>> : std::true_type {};
+
+template <typename Char, typename T> struct named_arg : view {
+ const Char* name;
+ const T& value;
+
+ named_arg(const Char* n, const T& v) : name(n), value(v) {}
+ static_assert(!is_named_arg<T>::value, "nested named arguments");
+};
+
+template <bool B = false> constexpr auto count() -> int { return B ? 1 : 0; }
+template <bool B1, bool B2, bool... Tail> constexpr auto count() -> int {
+ return (B1 ? 1 : 0) + count<B2, Tail...>();
+}
+
+template <typename... Args> constexpr auto count_named_args() -> int {
+ return count<is_named_arg<Args>::value...>();
+}
+template <typename... Args> constexpr auto count_static_named_args() -> int {
+ return count<is_static_named_arg<Args>::value...>();
+}
+
+template <typename Char> struct named_arg_info {
+ const Char* name;
+ int id;
+};
+
+template <typename Char, typename T, FMT_ENABLE_IF(!is_named_arg<T>::value)>
+void init_named_arg(named_arg_info<Char>*, int& arg_index, int&, const T&) {
+ ++arg_index;
+}
+template <typename Char, typename T, FMT_ENABLE_IF(is_named_arg<T>::value)>
+void init_named_arg(named_arg_info<Char>* named_args, int& arg_index,
+ int& named_arg_index, const T& arg) {
+ named_args[named_arg_index++] = {arg.name, arg_index++};
+}
+
+template <typename T, typename Char,
+ FMT_ENABLE_IF(!is_static_named_arg<T>::value)>
+FMT_CONSTEXPR void init_static_named_arg(named_arg_info<Char>*, int& arg_index,
+ int&) {
+ ++arg_index;
+}
+template <typename T, typename Char,
+ FMT_ENABLE_IF(is_static_named_arg<T>::value)>
+FMT_CONSTEXPR void init_static_named_arg(named_arg_info<Char>* named_args,
+ int& arg_index, int& named_arg_index) {
+ named_args[named_arg_index++] = {T::name, arg_index++};
+}
+
+// To minimize the number of types we need to deal with, long is translated
+// either to int or to long long depending on its size.
+enum { long_short = sizeof(long) == sizeof(int) };
+using long_type = conditional_t<long_short, int, long long>;
+using ulong_type = conditional_t<long_short, unsigned, unsigned long long>;
+
+template <typename T>
+using format_as_result =
+ remove_cvref_t<decltype(format_as(std::declval<const T&>()))>;
+template <typename T>
+using format_as_member_result =
+ remove_cvref_t<decltype(formatter<T>::format_as(std::declval<const T&>()))>;
+
+template <typename T, typename Enable = std::true_type>
+struct use_format_as : std::false_type {};
+// format_as member is only used to avoid injection into the std namespace.
+template <typename T, typename Enable = std::true_type>
+struct use_format_as_member : std::false_type {};
+
+// Only map owning types because mapping views can be unsafe.
+template <typename T>
+struct use_format_as<
+ T, bool_constant<std::is_arithmetic<format_as_result<T>>::value>>
+ : std::true_type {};
+template <typename T>
+struct use_format_as_member<
+ T, bool_constant<std::is_arithmetic<format_as_member_result<T>>::value>>
+ : std::true_type {};
+
+template <typename T, typename U = remove_const_t<T>>
+using use_formatter =
+ bool_constant<(std::is_class<T>::value || std::is_enum<T>::value ||
+ std::is_union<T>::value || std::is_array<T>::value) &&
+ !has_to_string_view<T>::value && !is_named_arg<T>::value &&
+ !use_format_as<T>::value && !use_format_as_member<U>::value>;
+
+template <typename Char, typename T, typename U = remove_const_t<T>>
+auto has_formatter_impl(T* p, buffered_context<Char>* ctx = nullptr)
+ -> decltype(formatter<U, Char>().format(*p, *ctx), std::true_type());
+template <typename Char> auto has_formatter_impl(...) -> std::false_type;
+
+// T can be const-qualified to check if it is const-formattable.
+template <typename T, typename Char> constexpr auto has_formatter() -> bool {
+ return decltype(has_formatter_impl<Char>(static_cast<T*>(nullptr)))::value;
+}
+
+// Maps formatting argument types to natively supported types or user-defined
+// types with formatters. Returns void on errors to be SFINAE-friendly.
+template <typename Char> struct type_mapper {
+ static auto map(signed char) -> int;
+ static auto map(unsigned char) -> unsigned;
+ static auto map(short) -> int;
+ static auto map(unsigned short) -> unsigned;
+ static auto map(int) -> int;
+ static auto map(unsigned) -> unsigned;
+ static auto map(long) -> long_type;
+ static auto map(unsigned long) -> ulong_type;
+ static auto map(long long) -> long long;
+ static auto map(unsigned long long) -> unsigned long long;
+ static auto map(int128_opt) -> int128_opt;
+ static auto map(uint128_opt) -> uint128_opt;
+ static auto map(bool) -> bool;
+
+ template <int N>
+ static auto map(bitint<N>) -> conditional_t<N <= 64, long long, void>;
+ template <int N>
+ static auto map(ubitint<N>)
+ -> conditional_t<N <= 64, unsigned long long, void>;
+
+ template <typename T, FMT_ENABLE_IF(is_char<T>::value)>
+ static auto map(T) -> conditional_t<
+ std::is_same<T, char>::value || std::is_same<T, Char>::value, Char, void>;
+
+ static auto map(float) -> float;
+ static auto map(double) -> double;
+ static auto map(long double) -> long double;
+
+ static auto map(Char*) -> const Char*;
+ static auto map(const Char*) -> const Char*;
+ template <typename T, typename C = char_t<T>,
+ FMT_ENABLE_IF(!std::is_pointer<T>::value)>
+ static auto map(const T&) -> conditional_t<std::is_same<C, Char>::value,
+ basic_string_view<C>, void>;
+
+ static auto map(void*) -> const void*;
+ static auto map(const void*) -> const void*;
+ static auto map(volatile void*) -> const void*;
+ static auto map(const volatile void*) -> const void*;
+ static auto map(nullptr_t) -> const void*;
+ template <typename T, FMT_ENABLE_IF(std::is_pointer<T>::value ||
+ std::is_member_pointer<T>::value)>
+ static auto map(const T&) -> void;
+
+ template <typename T, FMT_ENABLE_IF(use_format_as<T>::value)>
+ static auto map(const T& x) -> decltype(map(format_as(x)));
+ template <typename T, FMT_ENABLE_IF(use_format_as_member<T>::value)>
+ static auto map(const T& x) -> decltype(map(formatter<T>::format_as(x)));
+
+ template <typename T, FMT_ENABLE_IF(use_formatter<T>::value)>
+ static auto map(T&) -> conditional_t<has_formatter<T, Char>(), T&, void>;
+
+ template <typename T, FMT_ENABLE_IF(is_named_arg<T>::value)>
+ static auto map(const T& named_arg) -> decltype(map(named_arg.value));
+};
+
+// detail:: is used to workaround a bug in MSVC 2017.
+template <typename T, typename Char>
+using mapped_t = decltype(detail::type_mapper<Char>::map(std::declval<T&>()));
+
+// A type constant after applying type_mapper.
+template <typename T, typename Char = char>
+using mapped_type_constant = type_constant<mapped_t<T, Char>, Char>;
+
+template <typename T, typename Context,
+ type TYPE =
+ mapped_type_constant<T, typename Context::char_type>::value>
+using stored_type_constant = std::integral_constant<
+ type, Context::builtin_types || TYPE == type::int_type ? TYPE
+ : type::custom_type>;
+// A parse context with extra data used only in compile-time checks.
+template <typename Char>
+class compile_parse_context : public parse_context<Char> {
+ private:
+ int num_args_;
+ const type* types_;
+ using base = parse_context<Char>;
+
+ public:
+ FMT_CONSTEXPR explicit compile_parse_context(basic_string_view<Char> fmt,
+ int num_args, const type* types,
+ int next_arg_id = 0)
+ : base(fmt, next_arg_id), num_args_(num_args), types_(types) {}
+
+ constexpr auto num_args() const -> int { return num_args_; }
+ constexpr auto arg_type(int id) const -> type { return types_[id]; }
+
+ FMT_CONSTEXPR auto next_arg_id() -> int {
+ int id = base::next_arg_id();
+ if (id >= num_args_) report_error("argument not found");
+ return id;
+ }
+
+ FMT_CONSTEXPR void check_arg_id(int id) {
+ base::check_arg_id(id);
+ if (id >= num_args_) report_error("argument not found");
+ }
+ using base::check_arg_id;
+
+ FMT_CONSTEXPR void check_dynamic_spec(int arg_id) {
+ ignore_unused(arg_id);
+ if (arg_id < num_args_ && types_ && !is_integral_type(types_[arg_id]))
+ report_error("width/precision is not integer");
+ }
+};
+
+// An argument reference.
+template <typename Char> union arg_ref {
+ FMT_CONSTEXPR arg_ref(int idx = 0) : index(idx) {}
+ FMT_CONSTEXPR arg_ref(basic_string_view<Char> n) : name(n) {}
+
+ int index;
+ basic_string_view<Char> name;
+};
+
+// Format specifiers with width and precision resolved at formatting rather
+// than parsing time to allow reusing the same parsed specifiers with
+// different sets of arguments (precompilation of format strings).
+template <typename Char = char> struct dynamic_format_specs : format_specs {
+ arg_ref<Char> width_ref;
+ arg_ref<Char> precision_ref;
+};
+
+// Converts a character to ASCII. Returns '\0' on conversion failure.
+template <typename Char, FMT_ENABLE_IF(std::is_integral<Char>::value)>
+constexpr auto to_ascii(Char c) -> char {
+ return c <= 0xff ? static_cast<char>(c) : '\0';
+}
+
+// Returns the number of code units in a code point or 1 on error.
+template <typename Char>
+FMT_CONSTEXPR auto code_point_length(const Char* begin) -> int {
+ if (const_check(sizeof(Char) != 1)) return 1;
+ auto c = static_cast<unsigned char>(*begin);
+ return static_cast<int>((0x3a55000000000000ull >> (2 * (c >> 3))) & 3) + 1;
+}
+
+// Parses the range [begin, end) as an unsigned integer. This function assumes
+// that the range is non-empty and the first character is a digit.
+template <typename Char>
+FMT_CONSTEXPR auto parse_nonnegative_int(const Char*& begin, const Char* end,
+ int error_value) noexcept -> int {
+ FMT_ASSERT(begin != end && '0' <= *begin && *begin <= '9', "");
+ unsigned value = 0, prev = 0;
+ auto p = begin;
+ do {
+ prev = value;
+ value = value * 10 + unsigned(*p - '0');
+ ++p;
+ } while (p != end && '0' <= *p && *p <= '9');
+ auto num_digits = p - begin;
+ begin = p;
+ int digits10 = static_cast<int>(sizeof(int) * CHAR_BIT * 3 / 10);
+ if (num_digits <= digits10) return static_cast<int>(value);
+ // Check for overflow.
+ unsigned max = INT_MAX;
+ return num_digits == digits10 + 1 &&
+ prev * 10ull + unsigned(p[-1] - '0') <= max
+ ? static_cast<int>(value)
+ : error_value;
+}
+
+FMT_CONSTEXPR inline auto parse_align(char c) -> align {
+ switch (c) {
+ case '<': return align::left;
+ case '>': return align::right;
+ case '^': return align::center;
+ }
+ return align::none;
+}
+
+template <typename Char> constexpr auto is_name_start(Char c) -> bool {
+ return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || c == '_';
+}
+
+template <typename Char, typename Handler>
+FMT_CONSTEXPR auto parse_arg_id(const Char* begin, const Char* end,
+ Handler&& handler) -> const Char* {
+ Char c = *begin;
+ if (c >= '0' && c <= '9') {
+ int index = 0;
+ if (c != '0')
+ index = parse_nonnegative_int(begin, end, INT_MAX);
+ else
+ ++begin;
+ if (begin == end || (*begin != '}' && *begin != ':'))
+ report_error("invalid format string");
+ else
+ handler.on_index(index);
+ return begin;
+ }
+ if (FMT_OPTIMIZE_SIZE > 1 || !is_name_start(c)) {
+ report_error("invalid format string");
+ return begin;
+ }
+ auto it = begin;
+ do {
+ ++it;
+ } while (it != end && (is_name_start(*it) || ('0' <= *it && *it <= '9')));
+ handler.on_name({begin, to_unsigned(it - begin)});
+ return it;
+}
+
+template <typename Char> struct dynamic_spec_handler {
+ parse_context<Char>& ctx;
+ arg_ref<Char>& ref;
+ arg_id_kind& kind;
+
+ FMT_CONSTEXPR void on_index(int id) {
+ ref = id;
+ kind = arg_id_kind::index;
+ ctx.check_arg_id(id);
+ ctx.check_dynamic_spec(id);
+ }
+ FMT_CONSTEXPR void on_name(basic_string_view<Char> id) {
+ ref = id;
+ kind = arg_id_kind::name;
+ ctx.check_arg_id(id);
+ }
+};
+
+template <typename Char> struct parse_dynamic_spec_result {
+ const Char* end;
+ arg_id_kind kind;
+};
+
+// Parses integer | "{" [arg_id] "}".
+template <typename Char>
+FMT_CONSTEXPR auto parse_dynamic_spec(const Char* begin, const Char* end,
+ int& value, arg_ref<Char>& ref,
+ parse_context<Char>& ctx)
+ -> parse_dynamic_spec_result<Char> {
+ FMT_ASSERT(begin != end, "");
+ auto kind = arg_id_kind::none;
+ if ('0' <= *begin && *begin <= '9') {
+ int val = parse_nonnegative_int(begin, end, -1);
+ if (val == -1) report_error("number is too big");
+ value = val;
+ } else {
+ if (*begin == '{') {
+ ++begin;
+ if (begin != end) {
+ Char c = *begin;
+ if (c == '}' || c == ':') {
+ int id = ctx.next_arg_id();
+ ref = id;
+ kind = arg_id_kind::index;
+ ctx.check_dynamic_spec(id);
+ } else {
+ begin = parse_arg_id(begin, end,
+ dynamic_spec_handler<Char>{ctx, ref, kind});
+ }
+ }
+ if (begin != end && *begin == '}') return {++begin, kind};
+ }
+ report_error("invalid format string");
+ }
+ return {begin, kind};
+}
+
+template <typename Char>
+FMT_CONSTEXPR auto parse_width(const Char* begin, const Char* end,
+ format_specs& specs, arg_ref<Char>& width_ref,
+ parse_context<Char>& ctx) -> const Char* {
+ auto result = parse_dynamic_spec(begin, end, specs.width, width_ref, ctx);
+ specs.set_dynamic_width(result.kind);
+ return result.end;
+}
+
+template <typename Char>
+FMT_CONSTEXPR auto parse_precision(const Char* begin, const Char* end,
+ format_specs& specs,
+ arg_ref<Char>& precision_ref,
+ parse_context<Char>& ctx) -> const Char* {
+ ++begin;
+ if (begin == end) {
+ report_error("invalid precision");
+ return begin;
+ }
+ auto result =
+ parse_dynamic_spec(begin, end, specs.precision, precision_ref, ctx);
+ specs.set_dynamic_precision(result.kind);
+ return result.end;
+}
+
+enum class state { start, align, sign, hash, zero, width, precision, locale };
+
+// Parses standard format specifiers.
+template <typename Char>
+FMT_CONSTEXPR auto parse_format_specs(const Char* begin, const Char* end,
+ dynamic_format_specs<Char>& specs,
+ parse_context<Char>& ctx, type arg_type)
+ -> const Char* {
+ auto c = '\0';
+ if (end - begin > 1) {
+ auto next = to_ascii(begin[1]);
+ c = parse_align(next) == align::none ? to_ascii(*begin) : '\0';
+ } else {
+ if (begin == end) return begin;
+ c = to_ascii(*begin);
+ }
+
+ struct {
+ state current_state = state::start;
+ FMT_CONSTEXPR void operator()(state s, bool valid = true) {
+ if (current_state >= s || !valid)
+ report_error("invalid format specifier");
+ current_state = s;
+ }
+ } enter_state;
+
+ using pres = presentation_type;
+ constexpr auto integral_set = sint_set | uint_set | bool_set | char_set;
+ struct {
+ const Char*& begin;
+ format_specs& specs;
+ type arg_type;
+
+ FMT_CONSTEXPR auto operator()(pres pres_type, int set) -> const Char* {
+ if (!in(arg_type, set)) report_error("invalid format specifier");
+ specs.set_type(pres_type);
+ return begin + 1;
+ }
+ } parse_presentation_type{begin, specs, arg_type};
+
+ for (;;) {
+ switch (c) {
+ case '<':
+ case '>':
+ case '^':
+ enter_state(state::align);
+ specs.set_align(parse_align(c));
+ ++begin;
+ break;
+ case '+':
+ case ' ':
+ specs.set_sign(c == ' ' ? sign::space : sign::plus);
+ FMT_FALLTHROUGH;
+ case '-':
+ enter_state(state::sign, in(arg_type, sint_set | float_set));
+ ++begin;
+ break;
+ case '#':
+ enter_state(state::hash, is_arithmetic_type(arg_type));
+ specs.set_alt();
+ ++begin;
+ break;
+ case '0':
+ enter_state(state::zero);
+ if (!is_arithmetic_type(arg_type))
+ report_error("format specifier requires numeric argument");
+ if (specs.align() == align::none) {
+ // Ignore 0 if align is specified for compatibility with std::format.
+ specs.set_align(align::numeric);
+ specs.set_fill('0');
+ }
+ ++begin;
+ break;
+ // clang-format off
+ case '1': case '2': case '3': case '4': case '5':
+ case '6': case '7': case '8': case '9': case '{':
+ // clang-format on
+ enter_state(state::width);
+ begin = parse_width(begin, end, specs, specs.width_ref, ctx);
+ break;
+ case '.':
+ enter_state(state::precision,
+ in(arg_type, float_set | string_set | cstring_set));
+ begin = parse_precision(begin, end, specs, specs.precision_ref, ctx);
+ break;
+ case 'L':
+ enter_state(state::locale, is_arithmetic_type(arg_type));
+ specs.set_localized();
+ ++begin;
+ break;
+ case 'd': return parse_presentation_type(pres::dec, integral_set);
+ case 'X': specs.set_upper(); FMT_FALLTHROUGH;
+ case 'x': return parse_presentation_type(pres::hex, integral_set);
+ case 'o': return parse_presentation_type(pres::oct, integral_set);
+ case 'B': specs.set_upper(); FMT_FALLTHROUGH;
+ case 'b': return parse_presentation_type(pres::bin, integral_set);
+ case 'E': specs.set_upper(); FMT_FALLTHROUGH;
+ case 'e': return parse_presentation_type(pres::exp, float_set);
+ case 'F': specs.set_upper(); FMT_FALLTHROUGH;
+ case 'f': return parse_presentation_type(pres::fixed, float_set);
+ case 'G': specs.set_upper(); FMT_FALLTHROUGH;
+ case 'g': return parse_presentation_type(pres::general, float_set);
+ case 'A': specs.set_upper(); FMT_FALLTHROUGH;
+ case 'a': return parse_presentation_type(pres::hexfloat, float_set);
+ case 'c':
+ if (arg_type == type::bool_type) report_error("invalid format specifier");
+ return parse_presentation_type(pres::chr, integral_set);
+ case 's':
+ return parse_presentation_type(pres::string,
+ bool_set | string_set | cstring_set);
+ case 'p':
+ return parse_presentation_type(pres::pointer, pointer_set | cstring_set);
+ case '?':
+ return parse_presentation_type(pres::debug,
+ char_set | string_set | cstring_set);
+ case '}': return begin;
+ default: {
+ if (*begin == '}') return begin;
+ // Parse fill and alignment.
+ auto fill_end = begin + code_point_length(begin);
+ if (end - fill_end <= 0) {
+ report_error("invalid format specifier");
+ return begin;
+ }
+ if (*begin == '{') {
+ report_error("invalid fill character '{'");
+ return begin;
+ }
+ auto alignment = parse_align(to_ascii(*fill_end));
+ enter_state(state::align, alignment != align::none);
+ specs.set_fill(
+ basic_string_view<Char>(begin, to_unsigned(fill_end - begin)));
+ specs.set_align(alignment);
+ begin = fill_end + 1;
+ }
+ }
+ if (begin == end) return begin;
+ c = to_ascii(*begin);
+ }
+}
+
+template <typename Char, typename Handler>
+FMT_CONSTEXPR FMT_INLINE auto parse_replacement_field(const Char* begin,
+ const Char* end,
+ Handler&& handler)
+ -> const Char* {
+ ++begin;
+ if (begin == end) {
+ handler.on_error("invalid format string");
+ return end;
+ }
+ int arg_id = 0;
+ switch (*begin) {
+ case '}':
+ handler.on_replacement_field(handler.on_arg_id(), begin);
+ return begin + 1;
+ case '{': handler.on_text(begin, begin + 1); return begin + 1;
+ case ':': arg_id = handler.on_arg_id(); break;
+ default: {
+ struct id_adapter {
+ Handler& handler;
+ int arg_id;
+
+ FMT_CONSTEXPR void on_index(int id) { arg_id = handler.on_arg_id(id); }
+ FMT_CONSTEXPR void on_name(basic_string_view<Char> id) {
+ arg_id = handler.on_arg_id(id);
+ }
+ } adapter = {handler, 0};
+ begin = parse_arg_id(begin, end, adapter);
+ arg_id = adapter.arg_id;
+ Char c = begin != end ? *begin : Char();
+ if (c == '}') {
+ handler.on_replacement_field(arg_id, begin);
+ return begin + 1;
+ }
+ if (c != ':') {
+ handler.on_error("missing '}' in format string");
+ return end;
+ }
+ break;
+ }
+ }
+ begin = handler.on_format_specs(arg_id, begin + 1, end);
+ if (begin == end || *begin != '}')
+ return handler.on_error("unknown format specifier"), end;
+ return begin + 1;
+}
+
+template <typename Char, typename Handler>
+FMT_CONSTEXPR void parse_format_string(basic_string_view<Char> fmt,
+ Handler&& handler) {
+ auto begin = fmt.data(), end = begin + fmt.size();
+ auto p = begin;
+ while (p != end) {
+ auto c = *p++;
+ if (c == '{') {
+ handler.on_text(begin, p - 1);
+ begin = p = parse_replacement_field(p - 1, end, handler);
+ } else if (c == '}') {
+ if (p == end || *p != '}')
+ return handler.on_error("unmatched '}' in format string");
+ handler.on_text(begin, p);
+ begin = ++p;
+ }
+ }
+ handler.on_text(begin, end);
+}
+
+// Checks char specs and returns true iff the presentation type is char-like.
+FMT_CONSTEXPR inline auto check_char_specs(const format_specs& specs) -> bool {
+ auto type = specs.type();
+ if (type != presentation_type::none && type != presentation_type::chr &&
+ type != presentation_type::debug) {
+ return false;
+ }
+ if (specs.align() == align::numeric || specs.sign() != sign::none ||
+ specs.alt()) {
+ report_error("invalid format specifier for char");
+ }
+ return true;
+}
+
+// A base class for compile-time strings.
+struct compile_string {};
+
+template <typename T, typename Char>
+FMT_VISIBILITY("hidden") // Suppress an ld warning on macOS (#3769).
+FMT_CONSTEXPR auto invoke_parse(parse_context<Char>& ctx) -> const Char* {
+ using mapped_type = remove_cvref_t<mapped_t<T, Char>>;
+ constexpr bool formattable =
+ std::is_constructible<formatter<mapped_type, Char>>::value;
+ if (!formattable) return ctx.begin(); // Error is reported in the value ctor.
+ using formatted_type = conditional_t<formattable, mapped_type, int>;
+ return formatter<formatted_type, Char>().parse(ctx);
+}
+
+template <typename... T> struct arg_pack {};
+
+template <typename Char, int NUM_ARGS, int NUM_NAMED_ARGS, bool DYNAMIC_NAMES>
+class format_string_checker {
+ private:
+ type types_[max_of(1, NUM_ARGS)];
+ named_arg_info<Char> named_args_[max_of(1, NUM_NAMED_ARGS)];
+ compile_parse_context<Char> context_;
+
+ using parse_func = auto (*)(parse_context<Char>&) -> const Char*;
+ parse_func parse_funcs_[max_of(1, NUM_ARGS)];
+
+ public:
+ template <typename... T>
+ FMT_CONSTEXPR explicit format_string_checker(basic_string_view<Char> fmt,
+ arg_pack<T...>)
+ : types_{mapped_type_constant<T, Char>::value...},
+ named_args_{},
+ context_(fmt, NUM_ARGS, types_),
+ parse_funcs_{&invoke_parse<T, Char>...} {
+ int arg_index = 0, named_arg_index = 0;
+ FMT_APPLY_VARIADIC(
+ init_static_named_arg<T>(named_args_, arg_index, named_arg_index));
+ ignore_unused(arg_index, named_arg_index);
+ }
+
+ FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
+
+ FMT_CONSTEXPR auto on_arg_id() -> int { return context_.next_arg_id(); }
+ FMT_CONSTEXPR auto on_arg_id(int id) -> int {
+ context_.check_arg_id(id);
+ return id;
+ }
+ FMT_CONSTEXPR auto on_arg_id(basic_string_view<Char> id) -> int {
+ for (int i = 0; i < NUM_NAMED_ARGS; ++i) {
+ if (named_args_[i].name == id) return named_args_[i].id;
+ }
+ if (!DYNAMIC_NAMES) on_error("argument not found");
+ return -1;
+ }
+
+ FMT_CONSTEXPR void on_replacement_field(int id, const Char* begin) {
+ on_format_specs(id, begin, begin); // Call parse() on empty specs.
+ }
+
+ FMT_CONSTEXPR auto on_format_specs(int id, const Char* begin, const Char* end)
+ -> const Char* {
+ context_.advance_to(begin);
+ if (id >= 0 && id < NUM_ARGS) return parse_funcs_[id](context_);
+ while (begin != end && *begin != '}') ++begin;
+ return begin;
+ }
+
+ FMT_NORETURN FMT_CONSTEXPR void on_error(const char* message) {
+ report_error(message);
+ }
+};
+
+/// A contiguous memory buffer with an optional growing ability. It is an
+/// internal class and shouldn't be used directly, only via `memory_buffer`.
+template <typename T> class buffer {
+ private:
+ T* ptr_;
+ size_t size_;
+ size_t capacity_;
+
+ using grow_fun = void (*)(buffer& buf, size_t capacity);
+ grow_fun grow_;
+
+ protected:
+ // Don't initialize ptr_ since it is not accessed to save a few cycles.
+ FMT_MSC_WARNING(suppress : 26495)
+ FMT_CONSTEXPR buffer(grow_fun grow, size_t sz) noexcept
+ : size_(sz), capacity_(sz), grow_(grow) {}
+
+ constexpr buffer(grow_fun grow, T* p = nullptr, size_t sz = 0,
+ size_t cap = 0) noexcept
+ : ptr_(p), size_(sz), capacity_(cap), grow_(grow) {}
+
+ FMT_CONSTEXPR20 ~buffer() = default;
+ buffer(buffer&&) = default;
+
+ /// Sets the buffer data and capacity.
+ FMT_CONSTEXPR void set(T* buf_data, size_t buf_capacity) noexcept {
+ ptr_ = buf_data;
+ capacity_ = buf_capacity;
+ }
+
+ public:
+ using value_type = T;
+ using const_reference = const T&;
+
+ buffer(const buffer&) = delete;
+ void operator=(const buffer&) = delete;
+
+ auto begin() noexcept -> T* { return ptr_; }
+ auto end() noexcept -> T* { return ptr_ + size_; }
+
+ auto begin() const noexcept -> const T* { return ptr_; }
+ auto end() const noexcept -> const T* { return ptr_ + size_; }
+
+ /// Returns the size of this buffer.
+ constexpr auto size() const noexcept -> size_t { return size_; }
+
+ /// Returns the capacity of this buffer.
+ constexpr auto capacity() const noexcept -> size_t { return capacity_; }
+
+ /// Returns a pointer to the buffer data (not null-terminated).
+ FMT_CONSTEXPR auto data() noexcept -> T* { return ptr_; }
+ FMT_CONSTEXPR auto data() const noexcept -> const T* { return ptr_; }
+
+ /// Clears this buffer.
+ FMT_CONSTEXPR void clear() { size_ = 0; }
+
+ // Tries resizing the buffer to contain `count` elements. If T is a POD type
+ // the new elements may not be initialized.
+ FMT_CONSTEXPR void try_resize(size_t count) {
+ try_reserve(count);
+ size_ = min_of(count, capacity_);
+ }
+
+ // Tries increasing the buffer capacity to `new_capacity`. It can increase the
+ // capacity by a smaller amount than requested but guarantees there is space
+ // for at least one additional element either by increasing the capacity or by
+ // flushing the buffer if it is full.
+ FMT_CONSTEXPR void try_reserve(size_t new_capacity) {
+ if (new_capacity > capacity_) grow_(*this, new_capacity);
+ }
+
+ FMT_CONSTEXPR void push_back(const T& value) {
+ try_reserve(size_ + 1);
+ ptr_[size_++] = value;
+ }
+
+ /// Appends data to the end of the buffer.
+ template <typename U>
+// Workaround for MSVC2019 to fix error C2893: Failed to specialize function
+// template 'void fmt::v11::detail::buffer<T>::append(const U *,const U *)'.
+#if !FMT_MSC_VERSION || FMT_MSC_VERSION >= 1940
+ FMT_CONSTEXPR20
+#endif
+ void
+ append(const U* begin, const U* end) {
+ while (begin != end) {
+ auto count = to_unsigned(end - begin);
+ try_reserve(size_ + count);
+ auto free_cap = capacity_ - size_;
+ if (free_cap < count) count = free_cap;
+ // A loop is faster than memcpy on small sizes.
+ T* out = ptr_ + size_;
+ for (size_t i = 0; i < count; ++i) out[i] = begin[i];
+ size_ += count;
+ begin += count;
+ }
+ }
+
+ template <typename Idx> FMT_CONSTEXPR auto operator[](Idx index) -> T& {
+ return ptr_[index];
+ }
+ template <typename Idx>
+ FMT_CONSTEXPR auto operator[](Idx index) const -> const T& {
+ return ptr_[index];
+ }
+};
+
+struct buffer_traits {
+ constexpr explicit buffer_traits(size_t) {}
+ constexpr auto count() const -> size_t { return 0; }
+ constexpr auto limit(size_t size) const -> size_t { return size; }
+};
+
+class fixed_buffer_traits {
+ private:
+ size_t count_ = 0;
+ size_t limit_;
+
+ public:
+ constexpr explicit fixed_buffer_traits(size_t limit) : limit_(limit) {}
+ constexpr auto count() const -> size_t { return count_; }
+ FMT_CONSTEXPR auto limit(size_t size) -> size_t {
+ size_t n = limit_ > count_ ? limit_ - count_ : 0;
+ count_ += size;
+ return min_of(size, n);
+ }
+};
+
+// A buffer that writes to an output iterator when flushed.
+template <typename OutputIt, typename T, typename Traits = buffer_traits>
+class iterator_buffer : public Traits, public buffer<T> {
+ private:
+ OutputIt out_;
+ enum { buffer_size = 256 };
+ T data_[buffer_size];
+
+ static FMT_CONSTEXPR void grow(buffer<T>& buf, size_t) {
+ if (buf.size() == buffer_size) static_cast<iterator_buffer&>(buf).flush();
+ }
+
+ void flush() {
+ auto size = this->size();
+ this->clear();
+ const T* begin = data_;
+ const T* end = begin + this->limit(size);
+ while (begin != end) *out_++ = *begin++;
+ }
+
+ public:
+ explicit iterator_buffer(OutputIt out, size_t n = buffer_size)
+ : Traits(n), buffer<T>(grow, data_, 0, buffer_size), out_(out) {}
+ iterator_buffer(iterator_buffer&& other) noexcept
+ : Traits(other),
+ buffer<T>(grow, data_, 0, buffer_size),
+ out_(other.out_) {}
+ ~iterator_buffer() {
+ // Don't crash if flush fails during unwinding.
+ FMT_TRY { flush(); }
+ FMT_CATCH(...) {}
+ }
+
+ auto out() -> OutputIt {
+ flush();
+ return out_;
+ }
+ auto count() const -> size_t { return Traits::count() + this->size(); }
+};
+
+template <typename T>
+class iterator_buffer<T*, T, fixed_buffer_traits> : public fixed_buffer_traits,
+ public buffer<T> {
+ private:
+ T* out_;
+ enum { buffer_size = 256 };
+ T data_[buffer_size];
+
+ static FMT_CONSTEXPR void grow(buffer<T>& buf, size_t) {
+ if (buf.size() == buf.capacity())
+ static_cast<iterator_buffer&>(buf).flush();
+ }
+
+ void flush() {
+ size_t n = this->limit(this->size());
+ if (this->data() == out_) {
+ out_ += n;
+ this->set(data_, buffer_size);
+ }
+ this->clear();
+ }
+
+ public:
+ explicit iterator_buffer(T* out, size_t n = buffer_size)
+ : fixed_buffer_traits(n), buffer<T>(grow, out, 0, n), out_(out) {}
+ iterator_buffer(iterator_buffer&& other) noexcept
+ : fixed_buffer_traits(other),
+ buffer<T>(static_cast<iterator_buffer&&>(other)),
+ out_(other.out_) {
+ if (this->data() != out_) {
+ this->set(data_, buffer_size);
+ this->clear();
+ }
+ }
+ ~iterator_buffer() { flush(); }
+
+ auto out() -> T* {
+ flush();
+ return out_;
+ }
+ auto count() const -> size_t {
+ return fixed_buffer_traits::count() + this->size();
+ }
+};
+
+template <typename T> class iterator_buffer<T*, T> : public buffer<T> {
+ public:
+ explicit iterator_buffer(T* out, size_t = 0)
+ : buffer<T>([](buffer<T>&, size_t) {}, out, 0, ~size_t()) {}
+
+ auto out() -> T* { return &*this->end(); }
+};
+
+template <typename Container>
+class container_buffer : public buffer<typename Container::value_type> {
+ private:
+ using value_type = typename Container::value_type;
+
+ static FMT_CONSTEXPR void grow(buffer<value_type>& buf, size_t capacity) {
+ auto& self = static_cast<container_buffer&>(buf);
+ self.container.resize(capacity);
+ self.set(&self.container[0], capacity);
+ }
+
+ public:
+ Container& container;
+
+ explicit container_buffer(Container& c)
+ : buffer<value_type>(grow, c.size()), container(c) {}
+};
+
+// A buffer that writes to a container with the contiguous storage.
+template <typename OutputIt>
+class iterator_buffer<
+ OutputIt,
+ enable_if_t<is_back_insert_iterator<OutputIt>::value &&
+ is_contiguous<typename OutputIt::container_type>::value,
+ typename OutputIt::container_type::value_type>>
+ : public container_buffer<typename OutputIt::container_type> {
+ private:
+ using base = container_buffer<typename OutputIt::container_type>;
+
+ public:
+ explicit iterator_buffer(typename OutputIt::container_type& c) : base(c) {}
+ explicit iterator_buffer(OutputIt out, size_t = 0)
+ : base(get_container(out)) {}
+
+ auto out() -> OutputIt { return OutputIt(this->container); }
+};
+
+// A buffer that counts the number of code units written discarding the output.
+template <typename T = char> class counting_buffer : public buffer<T> {
+ private:
+ enum { buffer_size = 256 };
+ T data_[buffer_size];
+ size_t count_ = 0;
+
+ static FMT_CONSTEXPR void grow(buffer<T>& buf, size_t) {
+ if (buf.size() != buffer_size) return;
+ static_cast<counting_buffer&>(buf).count_ += buf.size();
+ buf.clear();
+ }
+
+ public:
+ FMT_CONSTEXPR counting_buffer() : buffer<T>(grow, data_, 0, buffer_size) {}
+
+ constexpr auto count() const noexcept -> size_t {
+ return count_ + this->size();
+ }
+};
+
+template <typename T>
+struct is_back_insert_iterator<basic_appender<T>> : std::true_type {};
+
+template <typename OutputIt, typename InputIt, typename = void>
+struct has_back_insert_iterator_container_append : std::false_type {};
+template <typename OutputIt, typename InputIt>
+struct has_back_insert_iterator_container_append<
+ OutputIt, InputIt,
+ void_t<decltype(get_container(std::declval<OutputIt>())
+ .append(std::declval<InputIt>(),
+ std::declval<InputIt>()))>> : std::true_type {};
+
+// An optimized version of std::copy with the output value type (T).
+template <typename T, typename InputIt, typename OutputIt,
+ FMT_ENABLE_IF(is_back_insert_iterator<OutputIt>::value&&
+ has_back_insert_iterator_container_append<
+ OutputIt, InputIt>::value)>
+FMT_CONSTEXPR20 auto copy(InputIt begin, InputIt end, OutputIt out)
+ -> OutputIt {
+ get_container(out).append(begin, end);
+ return out;
+}
+
+template <typename T, typename InputIt, typename OutputIt,
+ FMT_ENABLE_IF(is_back_insert_iterator<OutputIt>::value &&
+ !has_back_insert_iterator_container_append<
+ OutputIt, InputIt>::value)>
+FMT_CONSTEXPR20 auto copy(InputIt begin, InputIt end, OutputIt out)
+ -> OutputIt {
+ auto& c = get_container(out);
+ c.insert(c.end(), begin, end);
+ return out;
+}
+
+template <typename T, typename InputIt, typename OutputIt,
+ FMT_ENABLE_IF(!is_back_insert_iterator<OutputIt>::value)>
+FMT_CONSTEXPR auto copy(InputIt begin, InputIt end, OutputIt out) -> OutputIt {
+ while (begin != end) *out++ = static_cast<T>(*begin++);
+ return out;
+}
+
+template <typename T, typename V, typename OutputIt>
+FMT_CONSTEXPR auto copy(basic_string_view<V> s, OutputIt out) -> OutputIt {
+ return copy<T>(s.begin(), s.end(), out);
+}
+
+template <typename It, typename Enable = std::true_type>
+struct is_buffer_appender : std::false_type {};
+template <typename It>
+struct is_buffer_appender<
+ It, bool_constant<
+ is_back_insert_iterator<It>::value &&
+ std::is_base_of<buffer<typename It::container_type::value_type>,
+ typename It::container_type>::value>>
+ : std::true_type {};
+
+// Maps an output iterator to a buffer.
+template <typename T, typename OutputIt,
+ FMT_ENABLE_IF(!is_buffer_appender<OutputIt>::value)>
+auto get_buffer(OutputIt out) -> iterator_buffer<OutputIt, T> {
+ return iterator_buffer<OutputIt, T>(out);
+}
+template <typename T, typename OutputIt,
+ FMT_ENABLE_IF(is_buffer_appender<OutputIt>::value)>
+auto get_buffer(OutputIt out) -> buffer<T>& {
+ return get_container(out);
+}
+
+template <typename Buf, typename OutputIt>
+auto get_iterator(Buf& buf, OutputIt) -> decltype(buf.out()) {
+ return buf.out();
+}
+template <typename T, typename OutputIt>
+auto get_iterator(buffer<T>&, OutputIt out) -> OutputIt {
+ return out;
+}
+
+// This type is intentionally undefined, only used for errors.
+template <typename T, typename Char> struct type_is_unformattable_for;
+
+template <typename Char> struct string_value {
+ const Char* data;
+ size_t size;
+ auto str() const -> basic_string_view<Char> { return {data, size}; }
+};
+
+template <typename Context> struct custom_value {
+ using char_type = typename Context::char_type;
+ void* value;
+ void (*format)(void* arg, parse_context<char_type>& parse_ctx, Context& ctx);
+};
+
+template <typename Char> struct named_arg_value {
+ const named_arg_info<Char>* data;
+ size_t size;
+};
+
+struct custom_tag {};
+
+#if !FMT_BUILTIN_TYPES
+# define FMT_BUILTIN , monostate
+#else
+# define FMT_BUILTIN
+#endif
+
+// A formatting argument value.
+template <typename Context> class value {
+ public:
+ using char_type = typename Context::char_type;
+
+ union {
+ monostate no_value;
+ int int_value;
+ unsigned uint_value;
+ long long long_long_value;
+ unsigned long long ulong_long_value;
+ int128_opt int128_value;
+ uint128_opt uint128_value;
+ bool bool_value;
+ char_type char_value;
+ float float_value;
+ double double_value;
+ long double long_double_value;
+ const void* pointer;
+ string_value<char_type> string;
+ custom_value<Context> custom;
+ named_arg_value<char_type> named_args;
+ };
+
+ constexpr FMT_INLINE value() : no_value() {}
+ constexpr FMT_INLINE value(signed char x) : int_value(x) {}
+ constexpr FMT_INLINE value(unsigned char x FMT_BUILTIN) : uint_value(x) {}
+ constexpr FMT_INLINE value(signed short x) : int_value(x) {}
+ constexpr FMT_INLINE value(unsigned short x FMT_BUILTIN) : uint_value(x) {}
+ constexpr FMT_INLINE value(int x) : int_value(x) {}
+ constexpr FMT_INLINE value(unsigned x FMT_BUILTIN) : uint_value(x) {}
+ FMT_CONSTEXPR FMT_INLINE value(long x FMT_BUILTIN) : value(long_type(x)) {}
+ FMT_CONSTEXPR FMT_INLINE value(unsigned long x FMT_BUILTIN)
+ : value(ulong_type(x)) {}
+ constexpr FMT_INLINE value(long long x FMT_BUILTIN) : long_long_value(x) {}
+ constexpr FMT_INLINE value(unsigned long long x FMT_BUILTIN)
+ : ulong_long_value(x) {}
+ FMT_INLINE value(int128_opt x FMT_BUILTIN) : int128_value(x) {}
+ FMT_INLINE value(uint128_opt x FMT_BUILTIN) : uint128_value(x) {}
+ constexpr FMT_INLINE value(bool x FMT_BUILTIN) : bool_value(x) {}
+
+ template <int N>
+ constexpr FMT_INLINE value(bitint<N> x FMT_BUILTIN) : long_long_value(x) {
+ static_assert(N <= 64, "unsupported _BitInt");
+ }
+ template <int N>
+ constexpr FMT_INLINE value(ubitint<N> x FMT_BUILTIN) : ulong_long_value(x) {
+ static_assert(N <= 64, "unsupported _BitInt");
+ }
+
+ template <typename T, FMT_ENABLE_IF(is_char<T>::value)>
+ constexpr FMT_INLINE value(T x FMT_BUILTIN) : char_value(x) {
+ static_assert(
+ std::is_same<T, char>::value || std::is_same<T, char_type>::value,
+ "mixing character types is disallowed");
+ }
+
+ constexpr FMT_INLINE value(float x FMT_BUILTIN) : float_value(x) {}
+ constexpr FMT_INLINE value(double x FMT_BUILTIN) : double_value(x) {}
+ FMT_INLINE value(long double x FMT_BUILTIN) : long_double_value(x) {}
+
+ FMT_CONSTEXPR FMT_INLINE value(char_type* x FMT_BUILTIN) {
+ string.data = x;
+ if (is_constant_evaluated()) string.size = 0;
+ }
+ FMT_CONSTEXPR FMT_INLINE value(const char_type* x FMT_BUILTIN) {
+ string.data = x;
+ if (is_constant_evaluated()) string.size = 0;
+ }
+ template <typename T, typename C = char_t<T>,
+ FMT_ENABLE_IF(!std::is_pointer<T>::value)>
+ FMT_CONSTEXPR value(const T& x FMT_BUILTIN) {
+ static_assert(std::is_same<C, char_type>::value,
+ "mixing character types is disallowed");
+ auto sv = to_string_view(x);
+ string.data = sv.data();
+ string.size = sv.size();
+ }
+ FMT_INLINE value(void* x FMT_BUILTIN) : pointer(x) {}
+ FMT_INLINE value(const void* x FMT_BUILTIN) : pointer(x) {}
+ FMT_INLINE value(volatile void* x FMT_BUILTIN)
+ : pointer(const_cast<const void*>(x)) {}
+ FMT_INLINE value(const volatile void* x FMT_BUILTIN)
+ : pointer(const_cast<const void*>(x)) {}
+ FMT_INLINE value(nullptr_t) : pointer(nullptr) {}
+
+ template <typename T, FMT_ENABLE_IF(std::is_pointer<T>::value ||
+ std::is_member_pointer<T>::value)>
+ value(const T&) {
+ // Formatting of arbitrary pointers is disallowed. If you want to format a
+ // pointer cast it to `void*` or `const void*`. In particular, this forbids
+ // formatting of `[const] volatile char*` printed as bool by iostreams.
+ static_assert(sizeof(T) == 0,
+ "formatting of non-void pointers is disallowed");
+ }
+
+ template <typename T, FMT_ENABLE_IF(use_format_as<T>::value)>
+ value(const T& x) : value(format_as(x)) {}
+ template <typename T, FMT_ENABLE_IF(use_format_as_member<T>::value)>
+ value(const T& x) : value(formatter<T>::format_as(x)) {}
+
+ template <typename T, FMT_ENABLE_IF(is_named_arg<T>::value)>
+ value(const T& named_arg) : value(named_arg.value) {}
+
+ template <typename T,
+ FMT_ENABLE_IF(use_formatter<T>::value || !FMT_BUILTIN_TYPES)>
+ FMT_CONSTEXPR20 FMT_INLINE value(T& x) : value(x, custom_tag()) {}
+
+ FMT_ALWAYS_INLINE value(const named_arg_info<char_type>* args, size_t size)
+ : named_args{args, size} {}
+
+ private:
+ template <typename T, FMT_ENABLE_IF(has_formatter<T, char_type>())>
+ FMT_CONSTEXPR value(T& x, custom_tag) {
+ using value_type = remove_const_t<T>;
+ // T may overload operator& e.g. std::vector<bool>::reference in libc++.
+ if (!is_constant_evaluated()) {
+ custom.value =
+ const_cast<char*>(&reinterpret_cast<const volatile char&>(x));
+ } else {
+ custom.value = nullptr;
+#if defined(__cpp_if_constexpr)
+ if constexpr (std::is_same<decltype(&x), remove_reference_t<T>*>::value)
+ custom.value = const_cast<value_type*>(&x);
+#endif
+ }
+ custom.format = format_custom<value_type, formatter<value_type, char_type>>;
+ }
+
+ template <typename T, FMT_ENABLE_IF(!has_formatter<T, char_type>())>
+ FMT_CONSTEXPR value(const T&, custom_tag) {
+ // Cannot format an argument; to make type T formattable provide a
+ // formatter<T> specialization: https://fmt.dev/latest/api.html#udt.
+ type_is_unformattable_for<T, char_type> _;
+ }
+
+ // Formats an argument of a custom type, such as a user-defined class.
+ template <typename T, typename Formatter>
+ static void format_custom(void* arg, parse_context<char_type>& parse_ctx,
+ Context& ctx) {
+ auto f = Formatter();
+ parse_ctx.advance_to(f.parse(parse_ctx));
+ using qualified_type =
+ conditional_t<has_formatter<const T, char_type>(), const T, T>;
+ // format must be const for compatibility with std::format and compilation.
+ const auto& cf = f;
+ ctx.advance_to(cf.format(*static_cast<qualified_type*>(arg), ctx));
+ }
+};
+
+enum { packed_arg_bits = 4 };
+// Maximum number of arguments with packed types.
+enum { max_packed_args = 62 / packed_arg_bits };
+enum : unsigned long long { is_unpacked_bit = 1ULL << 63 };
+enum : unsigned long long { has_named_args_bit = 1ULL << 62 };
+
+template <typename It, typename T, typename Enable = void>
+struct is_output_iterator : std::false_type {};
+
+template <> struct is_output_iterator<appender, char> : std::true_type {};
+
+template <typename It, typename T>
+struct is_output_iterator<
+ It, T,
+ enable_if_t<std::is_assignable<decltype(*std::declval<decay_t<It>&>()++),
+ T>::value>> : std::true_type {};
+
+#ifndef FMT_USE_LOCALE
+# define FMT_USE_LOCALE (FMT_OPTIMIZE_SIZE <= 1)
+#endif
+
+// A type-erased reference to an std::locale to avoid a heavy <locale> include.
+class locale_ref {
+#if FMT_USE_LOCALE
+ private:
+ const void* locale_; // A type-erased pointer to std::locale.
+
+ public:
+ constexpr locale_ref() : locale_(nullptr) {}
+ template <typename Locale> locale_ref(const Locale& loc);
+
+ inline explicit operator bool() const noexcept { return locale_ != nullptr; }
+#endif // FMT_USE_LOCALE
+
+ public:
+ template <typename Locale> auto get() const -> Locale;
+};
+
+template <typename> constexpr auto encode_types() -> unsigned long long {
+ return 0;
+}
+
+template <typename Context, typename Arg, typename... Args>
+constexpr auto encode_types() -> unsigned long long {
+ return static_cast<unsigned>(stored_type_constant<Arg, Context>::value) |
+ (encode_types<Context, Args...>() << packed_arg_bits);
+}
+
+template <typename Context, typename... T, size_t NUM_ARGS = sizeof...(T)>
+constexpr auto make_descriptor() -> unsigned long long {
+ return NUM_ARGS <= max_packed_args ? encode_types<Context, T...>()
+ : is_unpacked_bit | NUM_ARGS;
+}
+
+template <typename Context, int NUM_ARGS>
+using arg_t = conditional_t<NUM_ARGS <= max_packed_args, value<Context>,
+ basic_format_arg<Context>>;
+
+template <typename Context, int NUM_ARGS, int NUM_NAMED_ARGS,
+ unsigned long long DESC>
+struct named_arg_store {
+ // args_[0].named_args points to named_args to avoid bloating format_args.
+ arg_t<Context, NUM_ARGS> args[1 + NUM_ARGS];
+ named_arg_info<typename Context::char_type> named_args[NUM_NAMED_ARGS];
+
+ template <typename... T>
+ FMT_CONSTEXPR FMT_ALWAYS_INLINE named_arg_store(T&... values)
+ : args{{named_args, NUM_NAMED_ARGS}, values...} {
+ int arg_index = 0, named_arg_index = 0;
+ FMT_APPLY_VARIADIC(
+ init_named_arg(named_args, arg_index, named_arg_index, values));
+ }
+
+ named_arg_store(named_arg_store&& rhs) {
+ args[0] = {named_args, NUM_NAMED_ARGS};
+ for (size_t i = 1; i < sizeof(args) / sizeof(*args); ++i)
+ args[i] = rhs.args[i];
+ for (size_t i = 0; i < NUM_NAMED_ARGS; ++i)
+ named_args[i] = rhs.named_args[i];
+ }
+
+ named_arg_store(const named_arg_store& rhs) = delete;
+ named_arg_store& operator=(const named_arg_store& rhs) = delete;
+ named_arg_store& operator=(named_arg_store&& rhs) = delete;
+ operator const arg_t<Context, NUM_ARGS>*() const { return args + 1; }
+};
+
+// An array of references to arguments. It can be implicitly converted to
+// `basic_format_args` for passing into type-erased formatting functions
+// such as `vformat`. It is a plain struct to reduce binary size in debug mode.
+template <typename Context, int NUM_ARGS, int NUM_NAMED_ARGS,
+ unsigned long long DESC>
+struct format_arg_store {
+ // +1 to workaround a bug in gcc 7.5 that causes duplicated-branches warning.
+ using type =
+ conditional_t<NUM_NAMED_ARGS == 0,
+ arg_t<Context, NUM_ARGS>[max_of(1, NUM_ARGS)],
+ named_arg_store<Context, NUM_ARGS, NUM_NAMED_ARGS, DESC>>;
+ type args;
+};
+
+// TYPE can be different from type_constant<T>, e.g. for __float128.
+template <typename T, typename Char, type TYPE> struct native_formatter {
+ private:
+ dynamic_format_specs<Char> specs_;
+
+ public:
+ using nonlocking = void;
+
+ FMT_CONSTEXPR auto parse(parse_context<Char>& ctx) -> const Char* {
+ if (ctx.begin() == ctx.end() || *ctx.begin() == '}') return ctx.begin();
+ auto end = parse_format_specs(ctx.begin(), ctx.end(), specs_, ctx, TYPE);
+ if (const_check(TYPE == type::char_type)) check_char_specs(specs_);
+ return end;
+ }
+
+ template <type U = TYPE,
+ FMT_ENABLE_IF(U == type::string_type || U == type::cstring_type ||
+ U == type::char_type)>
+ FMT_CONSTEXPR void set_debug_format(bool set = true) {
+ specs_.set_type(set ? presentation_type::debug : presentation_type::none);
+ }
+
+ FMT_PRAGMA_CLANG(diagnostic ignored "-Wundefined-inline")
+ template <typename FormatContext>
+ FMT_CONSTEXPR auto format(const T& val, FormatContext& ctx) const
+ -> decltype(ctx.out());
+};
+
+template <typename T, typename Enable = void>
+struct locking
+ : bool_constant<mapped_type_constant<T>::value == type::custom_type> {};
+template <typename T>
+struct locking<T, void_t<typename formatter<remove_cvref_t<T>>::nonlocking>>
+ : std::false_type {};
+
+template <typename T = int> FMT_CONSTEXPR inline auto is_locking() -> bool {
+ return locking<T>::value;
+}
+template <typename T1, typename T2, typename... Tail>
+FMT_CONSTEXPR inline auto is_locking() -> bool {
+ return locking<T1>::value || is_locking<T2, Tail...>();
+}
+
+FMT_API void vformat_to(buffer<char>& buf, string_view fmt, format_args args,
+ locale_ref loc = {});
+
+#if FMT_WIN32
+FMT_API void vprint_mojibake(FILE*, string_view, format_args, bool);
+#else // format_args is passed by reference since it is defined later.
+inline void vprint_mojibake(FILE*, string_view, const format_args&, bool) {}
+#endif
+} // namespace detail
+
+// The main public API.
+
+template <typename Char>
+FMT_CONSTEXPR void parse_context<Char>::do_check_arg_id(int arg_id) {
+ // Argument id is only checked at compile time during parsing because
+ // formatting has its own validation.
+ if (detail::is_constant_evaluated() && use_constexpr_cast) {
+ auto ctx = static_cast<detail::compile_parse_context<Char>*>(this);
+ if (arg_id >= ctx->num_args()) report_error("argument not found");
+ }
+}
+
+template <typename Char>
+FMT_CONSTEXPR void parse_context<Char>::check_dynamic_spec(int arg_id) {
+ using detail::compile_parse_context;
+ if (detail::is_constant_evaluated() && use_constexpr_cast)
+ static_cast<compile_parse_context<Char>*>(this)->check_dynamic_spec(arg_id);
+}
+
+FMT_BEGIN_EXPORT
+
+// An output iterator that appends to a buffer. It is used instead of
+// back_insert_iterator to reduce symbol sizes and avoid <iterator> dependency.
+template <typename T> class basic_appender {
+ protected:
+ detail::buffer<T>* container;
+
+ public:
+ using container_type = detail::buffer<T>;
+
+ FMT_CONSTEXPR basic_appender(detail::buffer<T>& buf) : container(&buf) {}
+
+ FMT_CONSTEXPR20 auto operator=(T c) -> basic_appender& {
+ container->push_back(c);
+ return *this;
+ }
+ FMT_CONSTEXPR20 auto operator*() -> basic_appender& { return *this; }
+ FMT_CONSTEXPR20 auto operator++() -> basic_appender& { return *this; }
+ FMT_CONSTEXPR20 auto operator++(int) -> basic_appender { return *this; }
+};
+
+// A formatting argument. Context is a template parameter for the compiled API
+// where output can be unbuffered.
+template <typename Context> class basic_format_arg {
+ private:
+ detail::value<Context> value_;
+ detail::type type_;
+
+ friend class basic_format_args<Context>;
+
+ using char_type = typename Context::char_type;
+
+ public:
+ class handle {
+ private:
+ detail::custom_value<Context> custom_;
+
+ public:
+ explicit handle(detail::custom_value<Context> custom) : custom_(custom) {}
+
+ void format(parse_context<char_type>& parse_ctx, Context& ctx) const {
+ custom_.format(custom_.value, parse_ctx, ctx);
+ }
+ };
+
+ constexpr basic_format_arg() : type_(detail::type::none_type) {}
+ basic_format_arg(const detail::named_arg_info<char_type>* args, size_t size)
+ : value_(args, size) {}
+ template <typename T>
+ basic_format_arg(T&& val)
+ : value_(val), type_(detail::stored_type_constant<T, Context>::value) {}
+
+ constexpr explicit operator bool() const noexcept {
+ return type_ != detail::type::none_type;
+ }
+ auto type() const -> detail::type { return type_; }
+
+ /**
+ * Visits an argument dispatching to the appropriate visit method based on
+ * the argument type. For example, if the argument type is `double` then
+ * `vis(value)` will be called with the value of type `double`.
+ */
+ template <typename Visitor>
+ FMT_CONSTEXPR FMT_INLINE auto visit(Visitor&& vis) const -> decltype(vis(0)) {
+ using detail::map;
+ switch (type_) {
+ case detail::type::none_type: break;
+ case detail::type::int_type: return vis(value_.int_value);
+ case detail::type::uint_type: return vis(value_.uint_value);
+ case detail::type::long_long_type: return vis(value_.long_long_value);
+ case detail::type::ulong_long_type: return vis(value_.ulong_long_value);
+ case detail::type::int128_type: return vis(map(value_.int128_value));
+ case detail::type::uint128_type: return vis(map(value_.uint128_value));
+ case detail::type::bool_type: return vis(value_.bool_value);
+ case detail::type::char_type: return vis(value_.char_value);
+ case detail::type::float_type: return vis(value_.float_value);
+ case detail::type::double_type: return vis(value_.double_value);
+ case detail::type::long_double_type: return vis(value_.long_double_value);
+ case detail::type::cstring_type: return vis(value_.string.data);
+ case detail::type::string_type: return vis(value_.string.str());
+ case detail::type::pointer_type: return vis(value_.pointer);
+ case detail::type::custom_type: return vis(handle(value_.custom));
+ }
+ return vis(monostate());
+ }
+
+ auto format_custom(const char_type* parse_begin,
+ parse_context<char_type>& parse_ctx, Context& ctx)
+ -> bool {
+ if (type_ != detail::type::custom_type) return false;
+ parse_ctx.advance_to(parse_begin);
+ value_.custom.format(value_.custom.value, parse_ctx, ctx);
+ return true;
+ }
+};
+
+/**
+ * A view of a collection of formatting arguments. To avoid lifetime issues it
+ * should only be used as a parameter type in type-erased functions such as
+ * `vformat`:
+ *
+ * void vlog(fmt::string_view fmt, fmt::format_args args); // OK
+ * fmt::format_args args = fmt::make_format_args(); // Dangling reference
+ */
+template <typename Context> class basic_format_args {
+ private:
+ // A descriptor that contains information about formatting arguments.
+ // If the number of arguments is less or equal to max_packed_args then
+ // argument types are passed in the descriptor. This reduces binary code size
+ // per formatting function call.
+ unsigned long long desc_;
+ union {
+ // If is_packed() returns true then argument values are stored in values_;
+ // otherwise they are stored in args_. This is done to improve cache
+ // locality and reduce compiled code size since storing larger objects
+ // may require more code (at least on x86-64) even if the same amount of
+ // data is actually copied to stack. It saves ~10% on the bloat test.
+ const detail::value<Context>* values_;
+ const basic_format_arg<Context>* args_;
+ };
+
+ constexpr auto is_packed() const -> bool {
+ return (desc_ & detail::is_unpacked_bit) == 0;
+ }
+ constexpr auto has_named_args() const -> bool {
+ return (desc_ & detail::has_named_args_bit) != 0;
+ }
+
+ FMT_CONSTEXPR auto type(int index) const -> detail::type {
+ int shift = index * detail::packed_arg_bits;
+ unsigned mask = (1 << detail::packed_arg_bits) - 1;
+ return static_cast<detail::type>((desc_ >> shift) & mask);
+ }
+
+ template <int NUM_ARGS, int NUM_NAMED_ARGS, unsigned long long DESC>
+ using store =
+ detail::format_arg_store<Context, NUM_ARGS, NUM_NAMED_ARGS, DESC>;
+
+ public:
+ using format_arg = basic_format_arg<Context>;
+
+ constexpr basic_format_args() : desc_(0), args_(nullptr) {}
+
+ /// Constructs a `basic_format_args` object from `format_arg_store`.
+ template <int NUM_ARGS, int NUM_NAMED_ARGS, unsigned long long DESC,
+ FMT_ENABLE_IF(NUM_ARGS <= detail::max_packed_args)>
+ constexpr FMT_ALWAYS_INLINE basic_format_args(
+ const store<NUM_ARGS, NUM_NAMED_ARGS, DESC>& s)
+ : desc_(DESC | (NUM_NAMED_ARGS != 0 ? +detail::has_named_args_bit : 0)),
+ values_(s.args) {}
+
+ template <int NUM_ARGS, int NUM_NAMED_ARGS, unsigned long long DESC,
+ FMT_ENABLE_IF(NUM_ARGS > detail::max_packed_args)>
+ constexpr basic_format_args(const store<NUM_ARGS, NUM_NAMED_ARGS, DESC>& s)
+ : desc_(DESC | (NUM_NAMED_ARGS != 0 ? +detail::has_named_args_bit : 0)),
+ args_(s.args) {}
+
+ /// Constructs a `basic_format_args` object from a dynamic list of arguments.
+ constexpr basic_format_args(const format_arg* args, int count,
+ bool has_named = false)
+ : desc_(detail::is_unpacked_bit | detail::to_unsigned(count) |
+ (has_named ? +detail::has_named_args_bit : 0)),
+ args_(args) {}
+
+ /// Returns the argument with the specified id.
+ FMT_CONSTEXPR auto get(int id) const -> format_arg {
+ auto arg = format_arg();
+ if (!is_packed()) {
+ if (id < max_size()) arg = args_[id];
+ return arg;
+ }
+ if (static_cast<unsigned>(id) >= detail::max_packed_args) return arg;
+ arg.type_ = type(id);
+ if (arg.type_ != detail::type::none_type) arg.value_ = values_[id];
+ return arg;
+ }
+
+ template <typename Char>
+ auto get(basic_string_view<Char> name) const -> format_arg {
+ int id = get_id(name);
+ return id >= 0 ? get(id) : format_arg();
+ }
+
+ template <typename Char>
+ FMT_CONSTEXPR auto get_id(basic_string_view<Char> name) const -> int {
+ if (!has_named_args()) return -1;
+ const auto& named_args =
+ (is_packed() ? values_[-1] : args_[-1].value_).named_args;
+ for (size_t i = 0; i < named_args.size; ++i) {
+ if (named_args.data[i].name == name) return named_args.data[i].id;
+ }
+ return -1;
+ }
+
+ auto max_size() const -> int {
+ unsigned long long max_packed = detail::max_packed_args;
+ return static_cast<int>(is_packed() ? max_packed
+ : desc_ & ~detail::is_unpacked_bit);
+ }
+};
+
+// A formatting context.
+class context {
+ private:
+ appender out_;
+ format_args args_;
+ FMT_NO_UNIQUE_ADDRESS detail::locale_ref loc_;
+
+ public:
+ /// The character type for the output.
+ using char_type = char;
+
+ using iterator = appender;
+ using format_arg = basic_format_arg<context>;
+ using parse_context_type FMT_DEPRECATED = parse_context<>;
+ template <typename T> using formatter_type FMT_DEPRECATED = formatter<T>;
+ enum { builtin_types = FMT_BUILTIN_TYPES };
+
+ /// Constructs a `context` object. References to the arguments are stored
+ /// in the object so make sure they have appropriate lifetimes.
+ FMT_CONSTEXPR context(iterator out, format_args args,
+ detail::locale_ref loc = {})
+ : out_(out), args_(args), loc_(loc) {}
+ context(context&&) = default;
+ context(const context&) = delete;
+ void operator=(const context&) = delete;
+
+ FMT_CONSTEXPR auto arg(int id) const -> format_arg { return args_.get(id); }
+ inline auto arg(string_view name) const -> format_arg {
+ return args_.get(name);
+ }
+ FMT_CONSTEXPR auto arg_id(string_view name) const -> int {
+ return args_.get_id(name);
+ }
+ auto args() const -> const format_args& { return args_; }
+
+ // Returns an iterator to the beginning of the output range.
+ FMT_CONSTEXPR auto out() const -> iterator { return out_; }
+
+ // Advances the begin iterator to `it`.
+ FMT_CONSTEXPR void advance_to(iterator) {}
+
+ FMT_CONSTEXPR auto locale() const -> detail::locale_ref { return loc_; }
+};
+
+template <typename Char = char> struct runtime_format_string {
+ basic_string_view<Char> str;
+};
+
+/**
+ * Creates a runtime format string.
+ *
+ * **Example**:
+ *
+ * // Check format string at runtime instead of compile-time.
+ * fmt::print(fmt::runtime("{:d}"), "I am not a number");
+ */
+inline auto runtime(string_view s) -> runtime_format_string<> { return {{s}}; }
+
+/// A compile-time format string. Use `format_string` in the public API to
+/// prevent type deduction.
+template <typename... T> struct fstring {
+ private:
+ static constexpr int num_static_named_args =
+ detail::count_static_named_args<T...>();
+
+ using checker = detail::format_string_checker<
+ char, static_cast<int>(sizeof...(T)), num_static_named_args,
+ num_static_named_args != detail::count_named_args<T...>()>;
+
+ using arg_pack = detail::arg_pack<T...>;
+
+ public:
+ string_view str;
+ using t = fstring;
+
+ // Reports a compile-time error if S is not a valid format string for T.
+ template <size_t N>
+ FMT_CONSTEVAL FMT_ALWAYS_INLINE fstring(const char (&s)[N]) : str(s, N - 1) {
+ using namespace detail;
+ static_assert(count<(std::is_base_of<view, remove_reference_t<T>>::value &&
+ std::is_reference<T>::value)...>() == 0,
+ "passing views as lvalues is disallowed");
+ if (FMT_USE_CONSTEVAL) parse_format_string<char>(s, checker(s, arg_pack()));
+#ifdef FMT_ENFORCE_COMPILE_STRING
+ static_assert(
+ FMT_USE_CONSTEVAL && sizeof(s) != 0,
+ "FMT_ENFORCE_COMPILE_STRING requires format strings to use FMT_STRING");
+#endif
+ }
+ template <typename S,
+ FMT_ENABLE_IF(std::is_convertible<const S&, string_view>::value)>
+ FMT_CONSTEVAL FMT_ALWAYS_INLINE fstring(const S& s) : str(s) {
+ auto sv = string_view(str);
+ if (FMT_USE_CONSTEVAL)
+ detail::parse_format_string<char>(sv, checker(sv, arg_pack()));
+#ifdef FMT_ENFORCE_COMPILE_STRING
+ static_assert(
+ FMT_USE_CONSTEVAL && sizeof(s) != 0,
+ "FMT_ENFORCE_COMPILE_STRING requires format strings to use FMT_STRING");
+#endif
+ }
+ template <typename S,
+ FMT_ENABLE_IF(std::is_base_of<detail::compile_string, S>::value&&
+ std::is_same<typename S::char_type, char>::value)>
+ FMT_ALWAYS_INLINE fstring(const S&) : str(S()) {
+ FMT_CONSTEXPR auto sv = string_view(S());
+ FMT_CONSTEXPR int unused =
+ (parse_format_string(sv, checker(sv, arg_pack())), 0);
+ detail::ignore_unused(unused);
+ }
+ fstring(runtime_format_string<> fmt) : str(fmt.str) {}
+
+ // Returning by reference generates better code in debug mode.
+ FMT_ALWAYS_INLINE operator const string_view&() const { return str; }
+ auto get() const -> string_view { return str; }
+};
+
+template <typename... T> using format_string = typename fstring<T...>::t;
+
+template <typename T, typename Char = char>
+using is_formattable = bool_constant<!std::is_same<
+ detail::mapped_t<conditional_t<std::is_void<T>::value, int*, T>, Char>,
+ void>::value>;
+#ifdef __cpp_concepts
+template <typename T, typename Char = char>
+concept formattable = is_formattable<remove_reference_t<T>, Char>::value;
+#endif
+
+template <typename T, typename Char>
+using has_formatter FMT_DEPRECATED = std::is_constructible<formatter<T, Char>>;
+
+// A formatter specialization for natively supported types.
+template <typename T, typename Char>
+struct formatter<T, Char,
+ enable_if_t<detail::type_constant<T, Char>::value !=
+ detail::type::custom_type>>
+ : detail::native_formatter<T, Char, detail::type_constant<T, Char>::value> {
+};
+
+/**
+ * Constructs an object that stores references to arguments and can be
+ * implicitly converted to `format_args`. `Context` can be omitted in which case
+ * it defaults to `context`. See `arg` for lifetime considerations.
+ */
+// Take arguments by lvalue references to avoid some lifetime issues, e.g.
+// auto args = make_format_args(std::string());
+template <typename Context = context, typename... T,
+ int NUM_ARGS = sizeof...(T),
+ int NUM_NAMED_ARGS = detail::count_named_args<T...>(),
+ unsigned long long DESC = detail::make_descriptor<Context, T...>()>
+constexpr FMT_ALWAYS_INLINE auto make_format_args(T&... args)
+ -> detail::format_arg_store<Context, NUM_ARGS, NUM_NAMED_ARGS, DESC> {
+ // Suppress warnings for pathological types convertible to detail::value.
+ FMT_PRAGMA_GCC(diagnostic ignored "-Wconversion")
+ return {{args...}};
+}
+
+template <typename... T>
+using vargs =
+ detail::format_arg_store<context, sizeof...(T),
+ detail::count_named_args<T...>(),
+ detail::make_descriptor<context, T...>()>;
+
+/**
+ * Returns a named argument to be used in a formatting function.
+ * It should only be used in a call to a formatting function.
+ *
+ * **Example**:
+ *
+ * fmt::print("The answer is {answer}.", fmt::arg("answer", 42));
+ */
+template <typename Char, typename T>
+inline auto arg(const Char* name, const T& arg) -> detail::named_arg<Char, T> {
+ return {name, arg};
+}
+
+/// Formats a string and writes the output to `out`.
+template <typename OutputIt,
+ FMT_ENABLE_IF(detail::is_output_iterator<remove_cvref_t<OutputIt>,
+ char>::value)>
+auto vformat_to(OutputIt&& out, string_view fmt, format_args args)
+ -> remove_cvref_t<OutputIt> {
+ auto&& buf = detail::get_buffer<char>(out);
+ detail::vformat_to(buf, fmt, args, {});
+ return detail::get_iterator(buf, out);
+}
+
+/**
+ * Formats `args` according to specifications in `fmt`, writes the result to
+ * the output iterator `out` and returns the iterator past the end of the output
+ * range. `format_to` does not append a terminating null character.
+ *
+ * **Example**:
+ *
+ * auto out = std::vector<char>();
+ * fmt::format_to(std::back_inserter(out), "{}", 42);
+ */
+template <typename OutputIt, typename... T,
+ FMT_ENABLE_IF(detail::is_output_iterator<remove_cvref_t<OutputIt>,
+ char>::value)>
+FMT_INLINE auto format_to(OutputIt&& out, format_string<T...> fmt, T&&... args)
+ -> remove_cvref_t<OutputIt> {
+ return vformat_to(out, fmt.str, vargs<T...>{{args...}});
+}
+
+template <typename OutputIt> struct format_to_n_result {
+ /// Iterator past the end of the output range.
+ OutputIt out;
+ /// Total (not truncated) output size.
+ size_t size;
+};
+
+template <typename OutputIt, typename... T,
+ FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
+auto vformat_to_n(OutputIt out, size_t n, string_view fmt, format_args args)
+ -> format_to_n_result<OutputIt> {
+ using traits = detail::fixed_buffer_traits;
+ auto buf = detail::iterator_buffer<OutputIt, char, traits>(out, n);
+ detail::vformat_to(buf, fmt, args, {});
+ return {buf.out(), buf.count()};
+}
+
+/**
+ * Formats `args` according to specifications in `fmt`, writes up to `n`
+ * characters of the result to the output iterator `out` and returns the total
+ * (not truncated) output size and the iterator past the end of the output
+ * range. `format_to_n` does not append a terminating null character.
+ */
+template <typename OutputIt, typename... T,
+ FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
+FMT_INLINE auto format_to_n(OutputIt out, size_t n, format_string<T...> fmt,
+ T&&... args) -> format_to_n_result<OutputIt> {
+ return vformat_to_n(out, n, fmt.str, vargs<T...>{{args...}});
+}
+
+struct format_to_result {
+ /// Pointer to just after the last successful write in the array.
+ char* out;
+ /// Specifies if the output was truncated.
+ bool truncated;
+
+ FMT_CONSTEXPR operator char*() const {
+ // Report truncation to prevent silent data loss.
+ if (truncated) report_error("output is truncated");
+ return out;
+ }
+};
+
+template <size_t N>
+auto vformat_to(char (&out)[N], string_view fmt, format_args args)
+ -> format_to_result {
+ auto result = vformat_to_n(out, N, fmt, args);
+ return {result.out, result.size > N};
+}
+
+template <size_t N, typename... T>
+FMT_INLINE auto format_to(char (&out)[N], format_string<T...> fmt, T&&... args)
+ -> format_to_result {
+ auto result = vformat_to_n(out, N, fmt.str, vargs<T...>{{args...}});
+ return {result.out, result.size > N};
+}
+
+/// Returns the number of chars in the output of `format(fmt, args...)`.
+template <typename... T>
+FMT_NODISCARD FMT_INLINE auto formatted_size(format_string<T...> fmt,
+ T&&... args) -> size_t {
+ auto buf = detail::counting_buffer<>();
+ detail::vformat_to(buf, fmt.str, vargs<T...>{{args...}}, {});
+ return buf.count();
+}
+
+FMT_API void vprint(string_view fmt, format_args args);
+FMT_API void vprint(FILE* f, string_view fmt, format_args args);
+FMT_API void vprintln(FILE* f, string_view fmt, format_args args);
+FMT_API void vprint_buffered(FILE* f, string_view fmt, format_args args);
+
+/**
+ * Formats `args` according to specifications in `fmt` and writes the output
+ * to `stdout`.
+ *
+ * **Example**:
+ *
+ * fmt::print("The answer is {}.", 42);
+ */
+template <typename... T>
+FMT_INLINE void print(format_string<T...> fmt, T&&... args) {
+ vargs<T...> va = {{args...}};
+ if (detail::const_check(!detail::use_utf8))
+ return detail::vprint_mojibake(stdout, fmt.str, va, false);
+ return detail::is_locking<T...>() ? vprint_buffered(stdout, fmt.str, va)
+ : vprint(fmt.str, va);
+}
+
+/**
+ * Formats `args` according to specifications in `fmt` and writes the
+ * output to the file `f`.
+ *
+ * **Example**:
+ *
+ * fmt::print(stderr, "Don't {}!", "panic");
+ */
+template <typename... T>
+FMT_INLINE void print(FILE* f, format_string<T...> fmt, T&&... args) {
+ vargs<T...> va = {{args...}};
+ if (detail::const_check(!detail::use_utf8))
+ return detail::vprint_mojibake(f, fmt.str, va, false);
+ return detail::is_locking<T...>() ? vprint_buffered(f, fmt.str, va)
+ : vprint(f, fmt.str, va);
+}
+
+/// Formats `args` according to specifications in `fmt` and writes the output
+/// to the file `f` followed by a newline.
+template <typename... T>
+FMT_INLINE void println(FILE* f, format_string<T...> fmt, T&&... args) {
+ vargs<T...> va = {{args...}};
+ return detail::const_check(detail::use_utf8)
+ ? vprintln(f, fmt.str, va)
+ : detail::vprint_mojibake(f, fmt.str, va, true);
+}
+
+/// Formats `args` according to specifications in `fmt` and writes the output
+/// to `stdout` followed by a newline.
+template <typename... T>
+FMT_INLINE void println(format_string<T...> fmt, T&&... args) {
+ return fmt::println(stdout, fmt, static_cast<T&&>(args)...);
+}
+
+FMT_END_EXPORT
+FMT_PRAGMA_CLANG(diagnostic pop)
+FMT_PRAGMA_GCC(pop_options)
+FMT_END_NAMESPACE
+
+#ifdef FMT_HEADER_ONLY
+# include "format.h"
+#endif
+#endif // FMT_BASE_H_
-// Formatting library for C++ - the core API for char/UTF-8
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
+// This file is only provided for compatibility and may be removed in future
+// versions. Use fmt/base.h if you don't need fmt::format and fmt/format.h
+// otherwise.
-#ifndef FMT_CORE_H_
-#define FMT_CORE_H_
-
-#include <cstddef> // std::byte
-#include <cstdio> // std::FILE
-#include <cstring> // std::strlen
-#include <iterator>
-#include <limits>
-#include <memory> // std::addressof
-#include <string>
-#include <type_traits>
-
-// The fmt library version in the form major * 10000 + minor * 100 + patch.
-#define FMT_VERSION 100201
-
-#if defined(__clang__) && !defined(__ibmxl__)
-# define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__)
-#else
-# define FMT_CLANG_VERSION 0
-#endif
-
-#if defined(__GNUC__) && !defined(__clang__) && !defined(__INTEL_COMPILER) && \
- !defined(__NVCOMPILER)
-# define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
-#else
-# define FMT_GCC_VERSION 0
-#endif
-
-#ifndef FMT_GCC_PRAGMA
-// Workaround _Pragma bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59884.
-# if FMT_GCC_VERSION >= 504
-# define FMT_GCC_PRAGMA(arg) _Pragma(arg)
-# else
-# define FMT_GCC_PRAGMA(arg)
-# endif
-#endif
-
-#ifdef __ICL
-# define FMT_ICC_VERSION __ICL
-#elif defined(__INTEL_COMPILER)
-# define FMT_ICC_VERSION __INTEL_COMPILER
-#else
-# define FMT_ICC_VERSION 0
-#endif
-
-#ifdef _MSC_VER
-# define FMT_MSC_VERSION _MSC_VER
-# define FMT_MSC_WARNING(...) __pragma(warning(__VA_ARGS__))
-#else
-# define FMT_MSC_VERSION 0
-# define FMT_MSC_WARNING(...)
-#endif
-
-#ifdef _MSVC_LANG
-# define FMT_CPLUSPLUS _MSVC_LANG
-#else
-# define FMT_CPLUSPLUS __cplusplus
-#endif
-
-#ifdef __has_feature
-# define FMT_HAS_FEATURE(x) __has_feature(x)
-#else
-# define FMT_HAS_FEATURE(x) 0
-#endif
-
-#if defined(__has_include) || FMT_ICC_VERSION >= 1600 || FMT_MSC_VERSION > 1900
-# define FMT_HAS_INCLUDE(x) __has_include(x)
-#else
-# define FMT_HAS_INCLUDE(x) 0
-#endif
-
-#ifdef __has_cpp_attribute
-# define FMT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
-#else
-# define FMT_HAS_CPP_ATTRIBUTE(x) 0
-#endif
-
-#define FMT_HAS_CPP14_ATTRIBUTE(attribute) \
- (FMT_CPLUSPLUS >= 201402L && FMT_HAS_CPP_ATTRIBUTE(attribute))
-
-#define FMT_HAS_CPP17_ATTRIBUTE(attribute) \
- (FMT_CPLUSPLUS >= 201703L && FMT_HAS_CPP_ATTRIBUTE(attribute))
-
-// Check if relaxed C++14 constexpr is supported.
-// GCC doesn't allow throw in constexpr until version 6 (bug 67371).
-#ifndef FMT_USE_CONSTEXPR
-# if (FMT_HAS_FEATURE(cxx_relaxed_constexpr) || FMT_MSC_VERSION >= 1912 || \
- (FMT_GCC_VERSION >= 600 && FMT_CPLUSPLUS >= 201402L)) && \
- !FMT_ICC_VERSION && (!defined(__NVCC__) || FMT_CPLUSPLUS >= 202002L)
-# define FMT_USE_CONSTEXPR 1
-# else
-# define FMT_USE_CONSTEXPR 0
-# endif
-#endif
-#if FMT_USE_CONSTEXPR
-# define FMT_CONSTEXPR constexpr
-#else
-# define FMT_CONSTEXPR
-#endif
-
-#if (FMT_CPLUSPLUS >= 202002L || \
- (FMT_CPLUSPLUS >= 201709L && FMT_GCC_VERSION >= 1002)) && \
- ((!defined(_GLIBCXX_RELEASE) || _GLIBCXX_RELEASE >= 10) && \
- (!defined(_LIBCPP_VERSION) || _LIBCPP_VERSION >= 10000) && \
- (!FMT_MSC_VERSION || FMT_MSC_VERSION >= 1928)) && \
- defined(__cpp_lib_is_constant_evaluated)
-# define FMT_CONSTEXPR20 constexpr
-#else
-# define FMT_CONSTEXPR20
-#endif
-
-// Check if constexpr std::char_traits<>::{compare,length} are supported.
-#if defined(__GLIBCXX__)
-# if FMT_CPLUSPLUS >= 201703L && defined(_GLIBCXX_RELEASE) && \
- _GLIBCXX_RELEASE >= 7 // GCC 7+ libstdc++ has _GLIBCXX_RELEASE.
-# define FMT_CONSTEXPR_CHAR_TRAITS constexpr
-# endif
-#elif defined(_LIBCPP_VERSION) && FMT_CPLUSPLUS >= 201703L && \
- _LIBCPP_VERSION >= 4000
-# define FMT_CONSTEXPR_CHAR_TRAITS constexpr
-#elif FMT_MSC_VERSION >= 1914 && FMT_CPLUSPLUS >= 201703L
-# define FMT_CONSTEXPR_CHAR_TRAITS constexpr
-#endif
-#ifndef FMT_CONSTEXPR_CHAR_TRAITS
-# define FMT_CONSTEXPR_CHAR_TRAITS
-#endif
-
-// Check if exceptions are disabled.
-#ifndef FMT_EXCEPTIONS
-# if (defined(__GNUC__) && !defined(__EXCEPTIONS)) || \
- (FMT_MSC_VERSION && !_HAS_EXCEPTIONS)
-# define FMT_EXCEPTIONS 0
-# else
-# define FMT_EXCEPTIONS 1
-# endif
-#endif
-
-// Disable [[noreturn]] on MSVC/NVCC because of bogus unreachable code warnings.
-#if FMT_EXCEPTIONS && FMT_HAS_CPP_ATTRIBUTE(noreturn) && !FMT_MSC_VERSION && \
- !defined(__NVCC__)
-# define FMT_NORETURN [[noreturn]]
-#else
-# define FMT_NORETURN
-#endif
-
-#ifndef FMT_NODISCARD
-# if FMT_HAS_CPP17_ATTRIBUTE(nodiscard)
-# define FMT_NODISCARD [[nodiscard]]
-# else
-# define FMT_NODISCARD
-# endif
-#endif
-
-#ifndef FMT_INLINE
-# if FMT_GCC_VERSION || FMT_CLANG_VERSION
-# define FMT_INLINE inline __attribute__((always_inline))
-# else
-# define FMT_INLINE inline
-# endif
-#endif
-
-#ifdef _MSC_VER
-# define FMT_UNCHECKED_ITERATOR(It) \
- using _Unchecked_type = It // Mark iterator as checked.
-#else
-# define FMT_UNCHECKED_ITERATOR(It) using unchecked_type = It
-#endif
-
-#ifndef FMT_BEGIN_NAMESPACE
-# define FMT_BEGIN_NAMESPACE \
- namespace fmt { \
- inline namespace v10 {
-# define FMT_END_NAMESPACE \
- } \
- }
-#endif
-
-#ifndef FMT_EXPORT
-# define FMT_EXPORT
-# define FMT_BEGIN_EXPORT
-# define FMT_END_EXPORT
-#endif
-
-#if FMT_GCC_VERSION || FMT_CLANG_VERSION
-# define FMT_VISIBILITY(value) __attribute__((visibility(value)))
-#else
-# define FMT_VISIBILITY(value)
-#endif
-
-#if !defined(FMT_HEADER_ONLY) && defined(_WIN32)
-# if defined(FMT_LIB_EXPORT)
-# define FMT_API __declspec(dllexport)
-# elif defined(FMT_SHARED)
-# define FMT_API __declspec(dllimport)
-# endif
-#elif defined(FMT_LIB_EXPORT) || defined(FMT_SHARED)
-# define FMT_API FMT_VISIBILITY("default")
-#endif
-#ifndef FMT_API
-# define FMT_API
-#endif
-
-// libc++ supports string_view in pre-c++17.
-#if FMT_HAS_INCLUDE(<string_view>) && \
- (FMT_CPLUSPLUS >= 201703L || defined(_LIBCPP_VERSION))
-# include <string_view>
-# define FMT_USE_STRING_VIEW
-#elif FMT_HAS_INCLUDE("experimental/string_view") && FMT_CPLUSPLUS >= 201402L
-# include <experimental/string_view>
-# define FMT_USE_EXPERIMENTAL_STRING_VIEW
-#endif
-
-#ifndef FMT_UNICODE
-# define FMT_UNICODE !FMT_MSC_VERSION
-#endif
-
-#ifndef FMT_CONSTEVAL
-# if ((FMT_GCC_VERSION >= 1000 || FMT_CLANG_VERSION >= 1101) && \
- (!defined(__apple_build_version__) || \
- __apple_build_version__ >= 14000029L) && \
- FMT_CPLUSPLUS >= 202002L) || \
- (defined(__cpp_consteval) && \
- (!FMT_MSC_VERSION || FMT_MSC_VERSION >= 1929))
-// consteval is broken in MSVC before VS2019 version 16.10 and Apple clang
-// before 14.
-# define FMT_CONSTEVAL consteval
-# define FMT_HAS_CONSTEVAL
-# else
-# define FMT_CONSTEVAL
-# endif
-#endif
-
-#ifndef FMT_USE_NONTYPE_TEMPLATE_ARGS
-# if defined(__cpp_nontype_template_args) && \
- ((FMT_GCC_VERSION >= 903 && FMT_CPLUSPLUS >= 201709L) || \
- __cpp_nontype_template_args >= 201911L) && \
- !defined(__NVCOMPILER) && !defined(__LCC__)
-# define FMT_USE_NONTYPE_TEMPLATE_ARGS 1
-# else
-# define FMT_USE_NONTYPE_TEMPLATE_ARGS 0
-# endif
-#endif
-
-// GCC < 5 requires this-> in decltype
-#ifndef FMT_DECLTYPE_THIS
-# if FMT_GCC_VERSION && FMT_GCC_VERSION < 500
-# define FMT_DECLTYPE_THIS this->
-# else
-# define FMT_DECLTYPE_THIS
-# endif
-#endif
-
-// Enable minimal optimizations for more compact code in debug mode.
-FMT_GCC_PRAGMA("GCC push_options")
-#if !defined(__OPTIMIZE__) && !defined(__NVCOMPILER) && !defined(__LCC__) && \
- !defined(__CUDACC__)
-FMT_GCC_PRAGMA("GCC optimize(\"Og\")")
-#endif
-
-FMT_BEGIN_NAMESPACE
-
-// Implementations of enable_if_t and other metafunctions for older systems.
-template <bool B, typename T = void>
-using enable_if_t = typename std::enable_if<B, T>::type;
-template <bool B, typename T, typename F>
-using conditional_t = typename std::conditional<B, T, F>::type;
-template <bool B> using bool_constant = std::integral_constant<bool, B>;
-template <typename T>
-using remove_reference_t = typename std::remove_reference<T>::type;
-template <typename T>
-using remove_const_t = typename std::remove_const<T>::type;
-template <typename T>
-using remove_cvref_t = typename std::remove_cv<remove_reference_t<T>>::type;
-template <typename T> struct type_identity {
- using type = T;
-};
-template <typename T> using type_identity_t = typename type_identity<T>::type;
-template <typename T>
-using underlying_t = typename std::underlying_type<T>::type;
-
-// Checks whether T is a container with contiguous storage.
-template <typename T> struct is_contiguous : std::false_type {};
-template <typename Char>
-struct is_contiguous<std::basic_string<Char>> : std::true_type {};
-
-struct monostate {
- constexpr monostate() {}
-};
-
-// An enable_if helper to be used in template parameters which results in much
-// shorter symbols: https://godbolt.org/z/sWw4vP. Extra parentheses are needed
-// to workaround a bug in MSVC 2019 (see #1140 and #1186).
-#ifdef FMT_DOC
-# define FMT_ENABLE_IF(...)
-#else
-# define FMT_ENABLE_IF(...) fmt::enable_if_t<(__VA_ARGS__), int> = 0
-#endif
-
-// This is defined in core.h instead of format.h to avoid injecting in std.
-// It is a template to avoid undesirable implicit conversions to std::byte.
-#ifdef __cpp_lib_byte
-template <typename T, FMT_ENABLE_IF(std::is_same<T, std::byte>::value)>
-inline auto format_as(T b) -> unsigned char {
- return static_cast<unsigned char>(b);
-}
-#endif
-
-namespace detail {
-// Suppresses "unused variable" warnings with the method described in
-// https://herbsutter.com/2009/10/18/mailbag-shutting-up-compiler-warnings/.
-// (void)var does not work on many Intel compilers.
-template <typename... T> FMT_CONSTEXPR void ignore_unused(const T&...) {}
-
-constexpr FMT_INLINE auto is_constant_evaluated(
- bool default_value = false) noexcept -> bool {
-// Workaround for incompatibility between libstdc++ consteval-based
-// std::is_constant_evaluated() implementation and clang-14.
-// https://github.com/fmtlib/fmt/issues/3247
-#if FMT_CPLUSPLUS >= 202002L && defined(_GLIBCXX_RELEASE) && \
- _GLIBCXX_RELEASE >= 12 && \
- (FMT_CLANG_VERSION >= 1400 && FMT_CLANG_VERSION < 1500)
- ignore_unused(default_value);
- return __builtin_is_constant_evaluated();
-#elif defined(__cpp_lib_is_constant_evaluated)
- ignore_unused(default_value);
- return std::is_constant_evaluated();
-#else
- return default_value;
-#endif
-}
-
-// Suppresses "conditional expression is constant" warnings.
-template <typename T> constexpr FMT_INLINE auto const_check(T value) -> T {
- return value;
-}
-
-FMT_NORETURN FMT_API void assert_fail(const char* file, int line,
- const char* message);
-
-#ifndef FMT_ASSERT
-# ifdef NDEBUG
-// FMT_ASSERT is not empty to avoid -Wempty-body.
-# define FMT_ASSERT(condition, message) \
- fmt::detail::ignore_unused((condition), (message))
-# else
-# define FMT_ASSERT(condition, message) \
- ((condition) /* void() fails with -Winvalid-constexpr on clang 4.0.1 */ \
- ? (void)0 \
- : fmt::detail::assert_fail(__FILE__, __LINE__, (message)))
-# endif
-#endif
-
-#if defined(FMT_USE_STRING_VIEW)
-template <typename Char> using std_string_view = std::basic_string_view<Char>;
-#elif defined(FMT_USE_EXPERIMENTAL_STRING_VIEW)
-template <typename Char>
-using std_string_view = std::experimental::basic_string_view<Char>;
-#else
-template <typename T> struct std_string_view {};
-#endif
-
-#ifdef FMT_USE_INT128
-// Do nothing.
-#elif defined(__SIZEOF_INT128__) && !defined(__NVCC__) && \
- !(FMT_CLANG_VERSION && FMT_MSC_VERSION)
-# define FMT_USE_INT128 1
-using int128_opt = __int128_t; // An optional native 128-bit integer.
-using uint128_opt = __uint128_t;
-template <typename T> inline auto convert_for_visit(T value) -> T {
- return value;
-}
-#else
-# define FMT_USE_INT128 0
-#endif
-#if !FMT_USE_INT128
-enum class int128_opt {};
-enum class uint128_opt {};
-// Reduce template instantiations.
-template <typename T> auto convert_for_visit(T) -> monostate { return {}; }
-#endif
-
-// Casts a nonnegative integer to unsigned.
-template <typename Int>
-FMT_CONSTEXPR auto to_unsigned(Int value) ->
- typename std::make_unsigned<Int>::type {
- FMT_ASSERT(std::is_unsigned<Int>::value || value >= 0, "negative value");
- return static_cast<typename std::make_unsigned<Int>::type>(value);
-}
-
-FMT_CONSTEXPR inline auto is_utf8() -> bool {
- FMT_MSC_WARNING(suppress : 4566) constexpr unsigned char section[] = "\u00A7";
-
- // Avoid buggy sign extensions in MSVC's constant evaluation mode (#2297).
- using uchar = unsigned char;
- return FMT_UNICODE || (sizeof(section) == 3 && uchar(section[0]) == 0xC2 &&
- uchar(section[1]) == 0xA7);
-}
-} // namespace detail
-
-/**
- An implementation of ``std::basic_string_view`` for pre-C++17. It provides a
- subset of the API. ``fmt::basic_string_view`` is used for format strings even
- if ``std::string_view`` is available to prevent issues when a library is
- compiled with a different ``-std`` option than the client code (which is not
- recommended).
- */
-FMT_EXPORT
-template <typename Char> class basic_string_view {
- private:
- const Char* data_;
- size_t size_;
-
- public:
- using value_type = Char;
- using iterator = const Char*;
-
- constexpr basic_string_view() noexcept : data_(nullptr), size_(0) {}
-
- /** Constructs a string reference object from a C string and a size. */
- constexpr basic_string_view(const Char* s, size_t count) noexcept
- : data_(s), size_(count) {}
-
- /**
- \rst
- Constructs a string reference object from a C string computing
- the size with ``std::char_traits<Char>::length``.
- \endrst
- */
- FMT_CONSTEXPR_CHAR_TRAITS
- FMT_INLINE
- basic_string_view(const Char* s)
- : data_(s),
- size_(detail::const_check(std::is_same<Char, char>::value &&
- !detail::is_constant_evaluated(true))
- ? std::strlen(reinterpret_cast<const char*>(s))
- : std::char_traits<Char>::length(s)) {}
-
- /** Constructs a string reference from a ``std::basic_string`` object. */
- template <typename Traits, typename Alloc>
- FMT_CONSTEXPR basic_string_view(
- const std::basic_string<Char, Traits, Alloc>& s) noexcept
- : data_(s.data()), size_(s.size()) {}
-
- template <typename S, FMT_ENABLE_IF(std::is_same<
- S, detail::std_string_view<Char>>::value)>
- FMT_CONSTEXPR basic_string_view(S s) noexcept
- : data_(s.data()), size_(s.size()) {}
-
- /** Returns a pointer to the string data. */
- constexpr auto data() const noexcept -> const Char* { return data_; }
-
- /** Returns the string size. */
- constexpr auto size() const noexcept -> size_t { return size_; }
-
- constexpr auto begin() const noexcept -> iterator { return data_; }
- constexpr auto end() const noexcept -> iterator { return data_ + size_; }
-
- constexpr auto operator[](size_t pos) const noexcept -> const Char& {
- return data_[pos];
- }
-
- FMT_CONSTEXPR void remove_prefix(size_t n) noexcept {
- data_ += n;
- size_ -= n;
- }
-
- FMT_CONSTEXPR_CHAR_TRAITS auto starts_with(
- basic_string_view<Char> sv) const noexcept -> bool {
- return size_ >= sv.size_ &&
- std::char_traits<Char>::compare(data_, sv.data_, sv.size_) == 0;
- }
- FMT_CONSTEXPR_CHAR_TRAITS auto starts_with(Char c) const noexcept -> bool {
- return size_ >= 1 && std::char_traits<Char>::eq(*data_, c);
- }
- FMT_CONSTEXPR_CHAR_TRAITS auto starts_with(const Char* s) const -> bool {
- return starts_with(basic_string_view<Char>(s));
- }
-
- // Lexicographically compare this string reference to other.
- FMT_CONSTEXPR_CHAR_TRAITS auto compare(basic_string_view other) const -> int {
- size_t str_size = size_ < other.size_ ? size_ : other.size_;
- int result = std::char_traits<Char>::compare(data_, other.data_, str_size);
- if (result == 0)
- result = size_ == other.size_ ? 0 : (size_ < other.size_ ? -1 : 1);
- return result;
- }
-
- FMT_CONSTEXPR_CHAR_TRAITS friend auto operator==(basic_string_view lhs,
- basic_string_view rhs)
- -> bool {
- return lhs.compare(rhs) == 0;
- }
- friend auto operator!=(basic_string_view lhs, basic_string_view rhs) -> bool {
- return lhs.compare(rhs) != 0;
- }
- friend auto operator<(basic_string_view lhs, basic_string_view rhs) -> bool {
- return lhs.compare(rhs) < 0;
- }
- friend auto operator<=(basic_string_view lhs, basic_string_view rhs) -> bool {
- return lhs.compare(rhs) <= 0;
- }
- friend auto operator>(basic_string_view lhs, basic_string_view rhs) -> bool {
- return lhs.compare(rhs) > 0;
- }
- friend auto operator>=(basic_string_view lhs, basic_string_view rhs) -> bool {
- return lhs.compare(rhs) >= 0;
- }
-};
-
-FMT_EXPORT
-using string_view = basic_string_view<char>;
-
-/** Specifies if ``T`` is a character type. Can be specialized by users. */
-FMT_EXPORT
-template <typename T> struct is_char : std::false_type {};
-template <> struct is_char<char> : std::true_type {};
-
-namespace detail {
-
-// A base class for compile-time strings.
-struct compile_string {};
-
-template <typename S>
-struct is_compile_string : std::is_base_of<compile_string, S> {};
-
-template <typename Char, FMT_ENABLE_IF(is_char<Char>::value)>
-FMT_INLINE auto to_string_view(const Char* s) -> basic_string_view<Char> {
- return s;
-}
-template <typename Char, typename Traits, typename Alloc>
-inline auto to_string_view(const std::basic_string<Char, Traits, Alloc>& s)
- -> basic_string_view<Char> {
- return s;
-}
-template <typename Char>
-constexpr auto to_string_view(basic_string_view<Char> s)
- -> basic_string_view<Char> {
- return s;
-}
-template <typename Char,
- FMT_ENABLE_IF(!std::is_empty<std_string_view<Char>>::value)>
-inline auto to_string_view(std_string_view<Char> s) -> basic_string_view<Char> {
- return s;
-}
-template <typename S, FMT_ENABLE_IF(is_compile_string<S>::value)>
-constexpr auto to_string_view(const S& s)
- -> basic_string_view<typename S::char_type> {
- return basic_string_view<typename S::char_type>(s);
-}
-void to_string_view(...);
-
-// Specifies whether S is a string type convertible to fmt::basic_string_view.
-// It should be a constexpr function but MSVC 2017 fails to compile it in
-// enable_if and MSVC 2015 fails to compile it as an alias template.
-// ADL is intentionally disabled as to_string_view is not an extension point.
-template <typename S>
-struct is_string
- : std::is_class<decltype(detail::to_string_view(std::declval<S>()))> {};
-
-template <typename S, typename = void> struct char_t_impl {};
-template <typename S> struct char_t_impl<S, enable_if_t<is_string<S>::value>> {
- using result = decltype(to_string_view(std::declval<S>()));
- using type = typename result::value_type;
-};
-
-enum class type {
- none_type,
- // Integer types should go first,
- int_type,
- uint_type,
- long_long_type,
- ulong_long_type,
- int128_type,
- uint128_type,
- bool_type,
- char_type,
- last_integer_type = char_type,
- // followed by floating-point types.
- float_type,
- double_type,
- long_double_type,
- last_numeric_type = long_double_type,
- cstring_type,
- string_type,
- pointer_type,
- custom_type
-};
-
-// Maps core type T to the corresponding type enum constant.
-template <typename T, typename Char>
-struct type_constant : std::integral_constant<type, type::custom_type> {};
-
-#define FMT_TYPE_CONSTANT(Type, constant) \
- template <typename Char> \
- struct type_constant<Type, Char> \
- : std::integral_constant<type, type::constant> {}
-
-FMT_TYPE_CONSTANT(int, int_type);
-FMT_TYPE_CONSTANT(unsigned, uint_type);
-FMT_TYPE_CONSTANT(long long, long_long_type);
-FMT_TYPE_CONSTANT(unsigned long long, ulong_long_type);
-FMT_TYPE_CONSTANT(int128_opt, int128_type);
-FMT_TYPE_CONSTANT(uint128_opt, uint128_type);
-FMT_TYPE_CONSTANT(bool, bool_type);
-FMT_TYPE_CONSTANT(Char, char_type);
-FMT_TYPE_CONSTANT(float, float_type);
-FMT_TYPE_CONSTANT(double, double_type);
-FMT_TYPE_CONSTANT(long double, long_double_type);
-FMT_TYPE_CONSTANT(const Char*, cstring_type);
-FMT_TYPE_CONSTANT(basic_string_view<Char>, string_type);
-FMT_TYPE_CONSTANT(const void*, pointer_type);
-
-constexpr auto is_integral_type(type t) -> bool {
- return t > type::none_type && t <= type::last_integer_type;
-}
-constexpr auto is_arithmetic_type(type t) -> bool {
- return t > type::none_type && t <= type::last_numeric_type;
-}
-
-constexpr auto set(type rhs) -> int { return 1 << static_cast<int>(rhs); }
-constexpr auto in(type t, int set) -> bool {
- return ((set >> static_cast<int>(t)) & 1) != 0;
-}
-
-// Bitsets of types.
-enum {
- sint_set =
- set(type::int_type) | set(type::long_long_type) | set(type::int128_type),
- uint_set = set(type::uint_type) | set(type::ulong_long_type) |
- set(type::uint128_type),
- bool_set = set(type::bool_type),
- char_set = set(type::char_type),
- float_set = set(type::float_type) | set(type::double_type) |
- set(type::long_double_type),
- string_set = set(type::string_type),
- cstring_set = set(type::cstring_type),
- pointer_set = set(type::pointer_type)
-};
-
-// DEPRECATED!
-FMT_NORETURN FMT_API void throw_format_error(const char* message);
-
-struct error_handler {
- constexpr error_handler() = default;
-
- // This function is intentionally not constexpr to give a compile-time error.
- FMT_NORETURN void on_error(const char* message) {
- throw_format_error(message);
- }
-};
-} // namespace detail
-
-/** Throws ``format_error`` with a given message. */
-using detail::throw_format_error;
-
-/** String's character type. */
-template <typename S> using char_t = typename detail::char_t_impl<S>::type;
-
-/**
- \rst
- Parsing context consisting of a format string range being parsed and an
- argument counter for automatic indexing.
- You can use the ``format_parse_context`` type alias for ``char`` instead.
- \endrst
- */
-FMT_EXPORT
-template <typename Char> class basic_format_parse_context {
- private:
- basic_string_view<Char> format_str_;
- int next_arg_id_;
-
- FMT_CONSTEXPR void do_check_arg_id(int id);
-
- public:
- using char_type = Char;
- using iterator = const Char*;
-
- explicit constexpr basic_format_parse_context(
- basic_string_view<Char> format_str, int next_arg_id = 0)
- : format_str_(format_str), next_arg_id_(next_arg_id) {}
-
- /**
- Returns an iterator to the beginning of the format string range being
- parsed.
- */
- constexpr auto begin() const noexcept -> iterator {
- return format_str_.begin();
- }
-
- /**
- Returns an iterator past the end of the format string range being parsed.
- */
- constexpr auto end() const noexcept -> iterator { return format_str_.end(); }
-
- /** Advances the begin iterator to ``it``. */
- FMT_CONSTEXPR void advance_to(iterator it) {
- format_str_.remove_prefix(detail::to_unsigned(it - begin()));
- }
-
- /**
- Reports an error if using the manual argument indexing; otherwise returns
- the next argument index and switches to the automatic indexing.
- */
- FMT_CONSTEXPR auto next_arg_id() -> int {
- if (next_arg_id_ < 0) {
- detail::throw_format_error(
- "cannot switch from manual to automatic argument indexing");
- return 0;
- }
- int id = next_arg_id_++;
- do_check_arg_id(id);
- return id;
- }
-
- /**
- Reports an error if using the automatic argument indexing; otherwise
- switches to the manual indexing.
- */
- FMT_CONSTEXPR void check_arg_id(int id) {
- if (next_arg_id_ > 0) {
- detail::throw_format_error(
- "cannot switch from automatic to manual argument indexing");
- return;
- }
- next_arg_id_ = -1;
- do_check_arg_id(id);
- }
- FMT_CONSTEXPR void check_arg_id(basic_string_view<Char>) {}
- FMT_CONSTEXPR void check_dynamic_spec(int arg_id);
-};
-
-FMT_EXPORT
-using format_parse_context = basic_format_parse_context<char>;
-
-namespace detail {
-// A parse context with extra data used only in compile-time checks.
-template <typename Char>
-class compile_parse_context : public basic_format_parse_context<Char> {
- private:
- int num_args_;
- const type* types_;
- using base = basic_format_parse_context<Char>;
-
- public:
- explicit FMT_CONSTEXPR compile_parse_context(
- basic_string_view<Char> format_str, int num_args, const type* types,
- int next_arg_id = 0)
- : base(format_str, next_arg_id), num_args_(num_args), types_(types) {}
-
- constexpr auto num_args() const -> int { return num_args_; }
- constexpr auto arg_type(int id) const -> type { return types_[id]; }
-
- FMT_CONSTEXPR auto next_arg_id() -> int {
- int id = base::next_arg_id();
- if (id >= num_args_) throw_format_error("argument not found");
- return id;
- }
-
- FMT_CONSTEXPR void check_arg_id(int id) {
- base::check_arg_id(id);
- if (id >= num_args_) throw_format_error("argument not found");
- }
- using base::check_arg_id;
-
- FMT_CONSTEXPR void check_dynamic_spec(int arg_id) {
- detail::ignore_unused(arg_id);
-#if !defined(__LCC__)
- if (arg_id < num_args_ && types_ && !is_integral_type(types_[arg_id]))
- throw_format_error("width/precision is not integer");
-#endif
- }
-};
-
-// Extracts a reference to the container from back_insert_iterator.
-template <typename Container>
-inline auto get_container(std::back_insert_iterator<Container> it)
- -> Container& {
- using base = std::back_insert_iterator<Container>;
- struct accessor : base {
- accessor(base b) : base(b) {}
- using base::container;
- };
- return *accessor(it).container;
-}
-
-template <typename Char, typename InputIt, typename OutputIt>
-FMT_CONSTEXPR auto copy_str(InputIt begin, InputIt end, OutputIt out)
- -> OutputIt {
- while (begin != end) *out++ = static_cast<Char>(*begin++);
- return out;
-}
-
-template <typename Char, typename T, typename U,
- FMT_ENABLE_IF(
- std::is_same<remove_const_t<T>, U>::value&& is_char<U>::value)>
-FMT_CONSTEXPR auto copy_str(T* begin, T* end, U* out) -> U* {
- if (is_constant_evaluated()) return copy_str<Char, T*, U*>(begin, end, out);
- auto size = to_unsigned(end - begin);
- if (size > 0) memcpy(out, begin, size * sizeof(U));
- return out + size;
-}
-
-/**
- \rst
- A contiguous memory buffer with an optional growing ability. It is an internal
- class and shouldn't be used directly, only via `~fmt::basic_memory_buffer`.
- \endrst
- */
-template <typename T> class buffer {
- private:
- T* ptr_;
- size_t size_;
- size_t capacity_;
-
- protected:
- // Don't initialize ptr_ since it is not accessed to save a few cycles.
- FMT_MSC_WARNING(suppress : 26495)
- FMT_CONSTEXPR buffer(size_t sz) noexcept : size_(sz), capacity_(sz) {}
-
- FMT_CONSTEXPR20 buffer(T* p = nullptr, size_t sz = 0, size_t cap = 0) noexcept
- : ptr_(p), size_(sz), capacity_(cap) {}
-
- FMT_CONSTEXPR20 ~buffer() = default;
- buffer(buffer&&) = default;
-
- /** Sets the buffer data and capacity. */
- FMT_CONSTEXPR void set(T* buf_data, size_t buf_capacity) noexcept {
- ptr_ = buf_data;
- capacity_ = buf_capacity;
- }
-
- /** Increases the buffer capacity to hold at least *capacity* elements. */
- // DEPRECATED!
- virtual FMT_CONSTEXPR20 void grow(size_t capacity) = 0;
-
- public:
- using value_type = T;
- using const_reference = const T&;
-
- buffer(const buffer&) = delete;
- void operator=(const buffer&) = delete;
-
- FMT_INLINE auto begin() noexcept -> T* { return ptr_; }
- FMT_INLINE auto end() noexcept -> T* { return ptr_ + size_; }
-
- FMT_INLINE auto begin() const noexcept -> const T* { return ptr_; }
- FMT_INLINE auto end() const noexcept -> const T* { return ptr_ + size_; }
-
- /** Returns the size of this buffer. */
- constexpr auto size() const noexcept -> size_t { return size_; }
-
- /** Returns the capacity of this buffer. */
- constexpr auto capacity() const noexcept -> size_t { return capacity_; }
-
- /** Returns a pointer to the buffer data (not null-terminated). */
- FMT_CONSTEXPR auto data() noexcept -> T* { return ptr_; }
- FMT_CONSTEXPR auto data() const noexcept -> const T* { return ptr_; }
-
- /** Clears this buffer. */
- void clear() { size_ = 0; }
-
- // Tries resizing the buffer to contain *count* elements. If T is a POD type
- // the new elements may not be initialized.
- FMT_CONSTEXPR20 void try_resize(size_t count) {
- try_reserve(count);
- size_ = count <= capacity_ ? count : capacity_;
- }
-
- // Tries increasing the buffer capacity to *new_capacity*. It can increase the
- // capacity by a smaller amount than requested but guarantees there is space
- // for at least one additional element either by increasing the capacity or by
- // flushing the buffer if it is full.
- FMT_CONSTEXPR20 void try_reserve(size_t new_capacity) {
- if (new_capacity > capacity_) grow(new_capacity);
- }
-
- FMT_CONSTEXPR20 void push_back(const T& value) {
- try_reserve(size_ + 1);
- ptr_[size_++] = value;
- }
-
- /** Appends data to the end of the buffer. */
- template <typename U> void append(const U* begin, const U* end);
-
- template <typename Idx> FMT_CONSTEXPR auto operator[](Idx index) -> T& {
- return ptr_[index];
- }
- template <typename Idx>
- FMT_CONSTEXPR auto operator[](Idx index) const -> const T& {
- return ptr_[index];
- }
-};
-
-struct buffer_traits {
- explicit buffer_traits(size_t) {}
- auto count() const -> size_t { return 0; }
- auto limit(size_t size) -> size_t { return size; }
-};
-
-class fixed_buffer_traits {
- private:
- size_t count_ = 0;
- size_t limit_;
-
- public:
- explicit fixed_buffer_traits(size_t limit) : limit_(limit) {}
- auto count() const -> size_t { return count_; }
- auto limit(size_t size) -> size_t {
- size_t n = limit_ > count_ ? limit_ - count_ : 0;
- count_ += size;
- return size < n ? size : n;
- }
-};
-
-// A buffer that writes to an output iterator when flushed.
-template <typename OutputIt, typename T, typename Traits = buffer_traits>
-class iterator_buffer final : public Traits, public buffer<T> {
- private:
- OutputIt out_;
- enum { buffer_size = 256 };
- T data_[buffer_size];
-
- protected:
- FMT_CONSTEXPR20 void grow(size_t) override {
- if (this->size() == buffer_size) flush();
- }
-
- void flush() {
- auto size = this->size();
- this->clear();
- out_ = copy_str<T>(data_, data_ + this->limit(size), out_);
- }
-
- public:
- explicit iterator_buffer(OutputIt out, size_t n = buffer_size)
- : Traits(n), buffer<T>(data_, 0, buffer_size), out_(out) {}
- iterator_buffer(iterator_buffer&& other)
- : Traits(other), buffer<T>(data_, 0, buffer_size), out_(other.out_) {}
- ~iterator_buffer() { flush(); }
-
- auto out() -> OutputIt {
- flush();
- return out_;
- }
- auto count() const -> size_t { return Traits::count() + this->size(); }
-};
-
-template <typename T>
-class iterator_buffer<T*, T, fixed_buffer_traits> final
- : public fixed_buffer_traits,
- public buffer<T> {
- private:
- T* out_;
- enum { buffer_size = 256 };
- T data_[buffer_size];
-
- protected:
- FMT_CONSTEXPR20 void grow(size_t) override {
- if (this->size() == this->capacity()) flush();
- }
-
- void flush() {
- size_t n = this->limit(this->size());
- if (this->data() == out_) {
- out_ += n;
- this->set(data_, buffer_size);
- }
- this->clear();
- }
-
- public:
- explicit iterator_buffer(T* out, size_t n = buffer_size)
- : fixed_buffer_traits(n), buffer<T>(out, 0, n), out_(out) {}
- iterator_buffer(iterator_buffer&& other)
- : fixed_buffer_traits(other),
- buffer<T>(std::move(other)),
- out_(other.out_) {
- if (this->data() != out_) {
- this->set(data_, buffer_size);
- this->clear();
- }
- }
- ~iterator_buffer() { flush(); }
-
- auto out() -> T* {
- flush();
- return out_;
- }
- auto count() const -> size_t {
- return fixed_buffer_traits::count() + this->size();
- }
-};
-
-template <typename T> class iterator_buffer<T*, T> final : public buffer<T> {
- protected:
- FMT_CONSTEXPR20 void grow(size_t) override {}
-
- public:
- explicit iterator_buffer(T* out, size_t = 0) : buffer<T>(out, 0, ~size_t()) {}
-
- auto out() -> T* { return &*this->end(); }
-};
-
-// A buffer that writes to a container with the contiguous storage.
-template <typename Container>
-class iterator_buffer<std::back_insert_iterator<Container>,
- enable_if_t<is_contiguous<Container>::value,
- typename Container::value_type>>
- final : public buffer<typename Container::value_type> {
- private:
- Container& container_;
-
- protected:
- FMT_CONSTEXPR20 void grow(size_t capacity) override {
- container_.resize(capacity);
- this->set(&container_[0], capacity);
- }
-
- public:
- explicit iterator_buffer(Container& c)
- : buffer<typename Container::value_type>(c.size()), container_(c) {}
- explicit iterator_buffer(std::back_insert_iterator<Container> out, size_t = 0)
- : iterator_buffer(get_container(out)) {}
-
- auto out() -> std::back_insert_iterator<Container> {
- return std::back_inserter(container_);
- }
-};
-
-// A buffer that counts the number of code units written discarding the output.
-template <typename T = char> class counting_buffer final : public buffer<T> {
- private:
- enum { buffer_size = 256 };
- T data_[buffer_size];
- size_t count_ = 0;
-
- protected:
- FMT_CONSTEXPR20 void grow(size_t) override {
- if (this->size() != buffer_size) return;
- count_ += this->size();
- this->clear();
- }
-
- public:
- counting_buffer() : buffer<T>(data_, 0, buffer_size) {}
-
- auto count() -> size_t { return count_ + this->size(); }
-};
-} // namespace detail
-
-template <typename Char>
-FMT_CONSTEXPR void basic_format_parse_context<Char>::do_check_arg_id(int id) {
- // Argument id is only checked at compile-time during parsing because
- // formatting has its own validation.
- if (detail::is_constant_evaluated() &&
- (!FMT_GCC_VERSION || FMT_GCC_VERSION >= 1200)) {
- using context = detail::compile_parse_context<Char>;
- if (id >= static_cast<context*>(this)->num_args())
- detail::throw_format_error("argument not found");
- }
-}
-
-template <typename Char>
-FMT_CONSTEXPR void basic_format_parse_context<Char>::check_dynamic_spec(
- int arg_id) {
- if (detail::is_constant_evaluated() &&
- (!FMT_GCC_VERSION || FMT_GCC_VERSION >= 1200)) {
- using context = detail::compile_parse_context<Char>;
- static_cast<context*>(this)->check_dynamic_spec(arg_id);
- }
-}
-
-FMT_EXPORT template <typename Context> class basic_format_arg;
-FMT_EXPORT template <typename Context> class basic_format_args;
-FMT_EXPORT template <typename Context> class dynamic_format_arg_store;
-
-// A formatter for objects of type T.
-FMT_EXPORT
-template <typename T, typename Char = char, typename Enable = void>
-struct formatter {
- // A deleted default constructor indicates a disabled formatter.
- formatter() = delete;
-};
-
-// Specifies if T has an enabled formatter specialization. A type can be
-// formattable even if it doesn't have a formatter e.g. via a conversion.
-template <typename T, typename Context>
-using has_formatter =
- std::is_constructible<typename Context::template formatter_type<T>>;
-
-// An output iterator that appends to a buffer.
-// It is used to reduce symbol sizes for the common case.
-class appender : public std::back_insert_iterator<detail::buffer<char>> {
- using base = std::back_insert_iterator<detail::buffer<char>>;
-
- public:
- using std::back_insert_iterator<detail::buffer<char>>::back_insert_iterator;
- appender(base it) noexcept : base(it) {}
- FMT_UNCHECKED_ITERATOR(appender);
-
- auto operator++() noexcept -> appender& { return *this; }
- auto operator++(int) noexcept -> appender { return *this; }
-};
-
-namespace detail {
-
-template <typename Context, typename T>
-constexpr auto has_const_formatter_impl(T*)
- -> decltype(typename Context::template formatter_type<T>().format(
- std::declval<const T&>(), std::declval<Context&>()),
- true) {
- return true;
-}
-template <typename Context>
-constexpr auto has_const_formatter_impl(...) -> bool {
- return false;
-}
-template <typename T, typename Context>
-constexpr auto has_const_formatter() -> bool {
- return has_const_formatter_impl<Context>(static_cast<T*>(nullptr));
-}
-
-template <typename T>
-using buffer_appender = conditional_t<std::is_same<T, char>::value, appender,
- std::back_insert_iterator<buffer<T>>>;
-
-// Maps an output iterator to a buffer.
-template <typename T, typename OutputIt>
-auto get_buffer(OutputIt out) -> iterator_buffer<OutputIt, T> {
- return iterator_buffer<OutputIt, T>(out);
-}
-template <typename T, typename Buf,
- FMT_ENABLE_IF(std::is_base_of<buffer<char>, Buf>::value)>
-auto get_buffer(std::back_insert_iterator<Buf> out) -> buffer<char>& {
- return get_container(out);
-}
-
-template <typename Buf, typename OutputIt>
-FMT_INLINE auto get_iterator(Buf& buf, OutputIt) -> decltype(buf.out()) {
- return buf.out();
-}
-template <typename T, typename OutputIt>
-auto get_iterator(buffer<T>&, OutputIt out) -> OutputIt {
- return out;
-}
-
-struct view {};
-
-template <typename Char, typename T> struct named_arg : view {
- const Char* name;
- const T& value;
- named_arg(const Char* n, const T& v) : name(n), value(v) {}
-};
-
-template <typename Char> struct named_arg_info {
- const Char* name;
- int id;
-};
-
-template <typename T, typename Char, size_t NUM_ARGS, size_t NUM_NAMED_ARGS>
-struct arg_data {
- // args_[0].named_args points to named_args_ to avoid bloating format_args.
- // +1 to workaround a bug in gcc 7.5 that causes duplicated-branches warning.
- T args_[1 + (NUM_ARGS != 0 ? NUM_ARGS : +1)];
- named_arg_info<Char> named_args_[NUM_NAMED_ARGS];
-
- template <typename... U>
- arg_data(const U&... init) : args_{T(named_args_, NUM_NAMED_ARGS), init...} {}
- arg_data(const arg_data& other) = delete;
- auto args() const -> const T* { return args_ + 1; }
- auto named_args() -> named_arg_info<Char>* { return named_args_; }
-};
-
-template <typename T, typename Char, size_t NUM_ARGS>
-struct arg_data<T, Char, NUM_ARGS, 0> {
- // +1 to workaround a bug in gcc 7.5 that causes duplicated-branches warning.
- T args_[NUM_ARGS != 0 ? NUM_ARGS : +1];
-
- template <typename... U>
- FMT_CONSTEXPR FMT_INLINE arg_data(const U&... init) : args_{init...} {}
- FMT_CONSTEXPR FMT_INLINE auto args() const -> const T* { return args_; }
- FMT_CONSTEXPR FMT_INLINE auto named_args() -> std::nullptr_t {
- return nullptr;
- }
-};
-
-template <typename Char>
-inline void init_named_args(named_arg_info<Char>*, int, int) {}
-
-template <typename T> struct is_named_arg : std::false_type {};
-template <typename T> struct is_statically_named_arg : std::false_type {};
-
-template <typename T, typename Char>
-struct is_named_arg<named_arg<Char, T>> : std::true_type {};
-
-template <typename Char, typename T, typename... Tail,
- FMT_ENABLE_IF(!is_named_arg<T>::value)>
-void init_named_args(named_arg_info<Char>* named_args, int arg_count,
- int named_arg_count, const T&, const Tail&... args) {
- init_named_args(named_args, arg_count + 1, named_arg_count, args...);
-}
-
-template <typename Char, typename T, typename... Tail,
- FMT_ENABLE_IF(is_named_arg<T>::value)>
-void init_named_args(named_arg_info<Char>* named_args, int arg_count,
- int named_arg_count, const T& arg, const Tail&... args) {
- named_args[named_arg_count++] = {arg.name, arg_count};
- init_named_args(named_args, arg_count + 1, named_arg_count, args...);
-}
-
-template <typename... Args>
-FMT_CONSTEXPR FMT_INLINE void init_named_args(std::nullptr_t, int, int,
- const Args&...) {}
-
-template <bool B = false> constexpr auto count() -> size_t { return B ? 1 : 0; }
-template <bool B1, bool B2, bool... Tail> constexpr auto count() -> size_t {
- return (B1 ? 1 : 0) + count<B2, Tail...>();
-}
-
-template <typename... Args> constexpr auto count_named_args() -> size_t {
- return count<is_named_arg<Args>::value...>();
-}
-
-template <typename... Args>
-constexpr auto count_statically_named_args() -> size_t {
- return count<is_statically_named_arg<Args>::value...>();
-}
-
-struct unformattable {};
-struct unformattable_char : unformattable {};
-struct unformattable_pointer : unformattable {};
-
-template <typename Char> struct string_value {
- const Char* data;
- size_t size;
-};
-
-template <typename Char> struct named_arg_value {
- const named_arg_info<Char>* data;
- size_t size;
-};
-
-template <typename Context> struct custom_value {
- using parse_context = typename Context::parse_context_type;
- void* value;
- void (*format)(void* arg, parse_context& parse_ctx, Context& ctx);
-};
-
-// A formatting argument value.
-template <typename Context> class value {
- public:
- using char_type = typename Context::char_type;
-
- union {
- monostate no_value;
- int int_value;
- unsigned uint_value;
- long long long_long_value;
- unsigned long long ulong_long_value;
- int128_opt int128_value;
- uint128_opt uint128_value;
- bool bool_value;
- char_type char_value;
- float float_value;
- double double_value;
- long double long_double_value;
- const void* pointer;
- string_value<char_type> string;
- custom_value<Context> custom;
- named_arg_value<char_type> named_args;
- };
-
- constexpr FMT_INLINE value() : no_value() {}
- constexpr FMT_INLINE value(int val) : int_value(val) {}
- constexpr FMT_INLINE value(unsigned val) : uint_value(val) {}
- constexpr FMT_INLINE value(long long val) : long_long_value(val) {}
- constexpr FMT_INLINE value(unsigned long long val) : ulong_long_value(val) {}
- FMT_INLINE value(int128_opt val) : int128_value(val) {}
- FMT_INLINE value(uint128_opt val) : uint128_value(val) {}
- constexpr FMT_INLINE value(float val) : float_value(val) {}
- constexpr FMT_INLINE value(double val) : double_value(val) {}
- FMT_INLINE value(long double val) : long_double_value(val) {}
- constexpr FMT_INLINE value(bool val) : bool_value(val) {}
- constexpr FMT_INLINE value(char_type val) : char_value(val) {}
- FMT_CONSTEXPR FMT_INLINE value(const char_type* val) {
- string.data = val;
- if (is_constant_evaluated()) string.size = {};
- }
- FMT_CONSTEXPR FMT_INLINE value(basic_string_view<char_type> val) {
- string.data = val.data();
- string.size = val.size();
- }
- FMT_INLINE value(const void* val) : pointer(val) {}
- FMT_INLINE value(const named_arg_info<char_type>* args, size_t size)
- : named_args{args, size} {}
-
- template <typename T> FMT_CONSTEXPR20 FMT_INLINE value(T& val) {
- using value_type = remove_const_t<T>;
- custom.value = const_cast<value_type*>(std::addressof(val));
- // Get the formatter type through the context to allow different contexts
- // have different extension points, e.g. `formatter<T>` for `format` and
- // `printf_formatter<T>` for `printf`.
- custom.format = format_custom_arg<
- value_type, typename Context::template formatter_type<value_type>>;
- }
- value(unformattable);
- value(unformattable_char);
- value(unformattable_pointer);
-
- private:
- // Formats an argument of a custom type, such as a user-defined class.
- template <typename T, typename Formatter>
- static void format_custom_arg(void* arg,
- typename Context::parse_context_type& parse_ctx,
- Context& ctx) {
- auto f = Formatter();
- parse_ctx.advance_to(f.parse(parse_ctx));
- using qualified_type =
- conditional_t<has_const_formatter<T, Context>(), const T, T>;
- // Calling format through a mutable reference is deprecated.
- ctx.advance_to(f.format(*static_cast<qualified_type*>(arg), ctx));
- }
-};
-
-// To minimize the number of types we need to deal with, long is translated
-// either to int or to long long depending on its size.
-enum { long_short = sizeof(long) == sizeof(int) };
-using long_type = conditional_t<long_short, int, long long>;
-using ulong_type = conditional_t<long_short, unsigned, unsigned long long>;
-
-template <typename T> struct format_as_result {
- template <typename U,
- FMT_ENABLE_IF(std::is_enum<U>::value || std::is_class<U>::value)>
- static auto map(U*) -> remove_cvref_t<decltype(format_as(std::declval<U>()))>;
- static auto map(...) -> void;
-
- using type = decltype(map(static_cast<T*>(nullptr)));
-};
-template <typename T> using format_as_t = typename format_as_result<T>::type;
-
-template <typename T>
-struct has_format_as
- : bool_constant<!std::is_same<format_as_t<T>, void>::value> {};
-
-// Maps formatting arguments to core types.
-// arg_mapper reports errors by returning unformattable instead of using
-// static_assert because it's used in the is_formattable trait.
-template <typename Context> struct arg_mapper {
- using char_type = typename Context::char_type;
-
- FMT_CONSTEXPR FMT_INLINE auto map(signed char val) -> int { return val; }
- FMT_CONSTEXPR FMT_INLINE auto map(unsigned char val) -> unsigned {
- return val;
- }
- FMT_CONSTEXPR FMT_INLINE auto map(short val) -> int { return val; }
- FMT_CONSTEXPR FMT_INLINE auto map(unsigned short val) -> unsigned {
- return val;
- }
- FMT_CONSTEXPR FMT_INLINE auto map(int val) -> int { return val; }
- FMT_CONSTEXPR FMT_INLINE auto map(unsigned val) -> unsigned { return val; }
- FMT_CONSTEXPR FMT_INLINE auto map(long val) -> long_type { return val; }
- FMT_CONSTEXPR FMT_INLINE auto map(unsigned long val) -> ulong_type {
- return val;
- }
- FMT_CONSTEXPR FMT_INLINE auto map(long long val) -> long long { return val; }
- FMT_CONSTEXPR FMT_INLINE auto map(unsigned long long val)
- -> unsigned long long {
- return val;
- }
- FMT_CONSTEXPR FMT_INLINE auto map(int128_opt val) -> int128_opt {
- return val;
- }
- FMT_CONSTEXPR FMT_INLINE auto map(uint128_opt val) -> uint128_opt {
- return val;
- }
- FMT_CONSTEXPR FMT_INLINE auto map(bool val) -> bool { return val; }
-
- template <typename T, FMT_ENABLE_IF(std::is_same<T, char>::value ||
- std::is_same<T, char_type>::value)>
- FMT_CONSTEXPR FMT_INLINE auto map(T val) -> char_type {
- return val;
- }
- template <typename T, enable_if_t<(std::is_same<T, wchar_t>::value ||
-#ifdef __cpp_char8_t
- std::is_same<T, char8_t>::value ||
-#endif
- std::is_same<T, char16_t>::value ||
- std::is_same<T, char32_t>::value) &&
- !std::is_same<T, char_type>::value,
- int> = 0>
- FMT_CONSTEXPR FMT_INLINE auto map(T) -> unformattable_char {
- return {};
- }
-
- FMT_CONSTEXPR FMT_INLINE auto map(float val) -> float { return val; }
- FMT_CONSTEXPR FMT_INLINE auto map(double val) -> double { return val; }
- FMT_CONSTEXPR FMT_INLINE auto map(long double val) -> long double {
- return val;
- }
-
- FMT_CONSTEXPR FMT_INLINE auto map(char_type* val) -> const char_type* {
- return val;
- }
- FMT_CONSTEXPR FMT_INLINE auto map(const char_type* val) -> const char_type* {
- return val;
- }
- template <typename T,
- FMT_ENABLE_IF(is_string<T>::value && !std::is_pointer<T>::value &&
- std::is_same<char_type, char_t<T>>::value)>
- FMT_CONSTEXPR FMT_INLINE auto map(const T& val)
- -> basic_string_view<char_type> {
- return to_string_view(val);
- }
- template <typename T,
- FMT_ENABLE_IF(is_string<T>::value && !std::is_pointer<T>::value &&
- !std::is_same<char_type, char_t<T>>::value)>
- FMT_CONSTEXPR FMT_INLINE auto map(const T&) -> unformattable_char {
- return {};
- }
-
- FMT_CONSTEXPR FMT_INLINE auto map(void* val) -> const void* { return val; }
- FMT_CONSTEXPR FMT_INLINE auto map(const void* val) -> const void* {
- return val;
- }
- FMT_CONSTEXPR FMT_INLINE auto map(std::nullptr_t val) -> const void* {
- return val;
- }
-
- // Use SFINAE instead of a const T* parameter to avoid a conflict with the
- // array overload.
- template <
- typename T,
- FMT_ENABLE_IF(
- std::is_pointer<T>::value || std::is_member_pointer<T>::value ||
- std::is_function<typename std::remove_pointer<T>::type>::value ||
- (std::is_array<T>::value &&
- !std::is_convertible<T, const char_type*>::value))>
- FMT_CONSTEXPR auto map(const T&) -> unformattable_pointer {
- return {};
- }
-
- template <typename T, std::size_t N,
- FMT_ENABLE_IF(!std::is_same<T, wchar_t>::value)>
- FMT_CONSTEXPR FMT_INLINE auto map(const T (&values)[N]) -> const T (&)[N] {
- return values;
- }
-
- // Only map owning types because mapping views can be unsafe.
- template <typename T, typename U = format_as_t<T>,
- FMT_ENABLE_IF(std::is_arithmetic<U>::value)>
- FMT_CONSTEXPR FMT_INLINE auto map(const T& val)
- -> decltype(FMT_DECLTYPE_THIS map(U())) {
- return map(format_as(val));
- }
-
- template <typename T, typename U = remove_const_t<T>>
- struct formattable : bool_constant<has_const_formatter<U, Context>() ||
- (has_formatter<U, Context>::value &&
- !std::is_const<T>::value)> {};
-
- template <typename T, FMT_ENABLE_IF(formattable<T>::value)>
- FMT_CONSTEXPR FMT_INLINE auto do_map(T& val) -> T& {
- return val;
- }
- template <typename T, FMT_ENABLE_IF(!formattable<T>::value)>
- FMT_CONSTEXPR FMT_INLINE auto do_map(T&) -> unformattable {
- return {};
- }
-
- template <typename T, typename U = remove_const_t<T>,
- FMT_ENABLE_IF((std::is_class<U>::value || std::is_enum<U>::value ||
- std::is_union<U>::value) &&
- !is_string<U>::value && !is_char<U>::value &&
- !is_named_arg<U>::value &&
- !std::is_arithmetic<format_as_t<U>>::value)>
- FMT_CONSTEXPR FMT_INLINE auto map(T& val)
- -> decltype(FMT_DECLTYPE_THIS do_map(val)) {
- return do_map(val);
- }
-
- template <typename T, FMT_ENABLE_IF(is_named_arg<T>::value)>
- FMT_CONSTEXPR FMT_INLINE auto map(const T& named_arg)
- -> decltype(FMT_DECLTYPE_THIS map(named_arg.value)) {
- return map(named_arg.value);
- }
-
- auto map(...) -> unformattable { return {}; }
-};
-
-// A type constant after applying arg_mapper<Context>.
-template <typename T, typename Context>
-using mapped_type_constant =
- type_constant<decltype(arg_mapper<Context>().map(std::declval<const T&>())),
- typename Context::char_type>;
-
-enum { packed_arg_bits = 4 };
-// Maximum number of arguments with packed types.
-enum { max_packed_args = 62 / packed_arg_bits };
-enum : unsigned long long { is_unpacked_bit = 1ULL << 63 };
-enum : unsigned long long { has_named_args_bit = 1ULL << 62 };
-
-template <typename Char, typename InputIt>
-auto copy_str(InputIt begin, InputIt end, appender out) -> appender {
- get_container(out).append(begin, end);
- return out;
-}
-template <typename Char, typename InputIt>
-auto copy_str(InputIt begin, InputIt end,
- std::back_insert_iterator<std::string> out)
- -> std::back_insert_iterator<std::string> {
- get_container(out).append(begin, end);
- return out;
-}
-
-template <typename Char, typename R, typename OutputIt>
-FMT_CONSTEXPR auto copy_str(R&& rng, OutputIt out) -> OutputIt {
- return detail::copy_str<Char>(rng.begin(), rng.end(), out);
-}
-
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 500
-// A workaround for gcc 4.8 to make void_t work in a SFINAE context.
-template <typename...> struct void_t_impl {
- using type = void;
-};
-template <typename... T> using void_t = typename void_t_impl<T...>::type;
-#else
-template <typename...> using void_t = void;
-#endif
-
-template <typename It, typename T, typename Enable = void>
-struct is_output_iterator : std::false_type {};
-
-template <typename It, typename T>
-struct is_output_iterator<
- It, T,
- void_t<typename std::iterator_traits<It>::iterator_category,
- decltype(*std::declval<It>() = std::declval<T>())>>
- : std::true_type {};
-
-template <typename It> struct is_back_insert_iterator : std::false_type {};
-template <typename Container>
-struct is_back_insert_iterator<std::back_insert_iterator<Container>>
- : std::true_type {};
-
-// A type-erased reference to an std::locale to avoid a heavy <locale> include.
-class locale_ref {
- private:
- const void* locale_; // A type-erased pointer to std::locale.
-
- public:
- constexpr FMT_INLINE locale_ref() : locale_(nullptr) {}
- template <typename Locale> explicit locale_ref(const Locale& loc);
-
- explicit operator bool() const noexcept { return locale_ != nullptr; }
-
- template <typename Locale> auto get() const -> Locale;
-};
-
-template <typename> constexpr auto encode_types() -> unsigned long long {
- return 0;
-}
-
-template <typename Context, typename Arg, typename... Args>
-constexpr auto encode_types() -> unsigned long long {
- return static_cast<unsigned>(mapped_type_constant<Arg, Context>::value) |
- (encode_types<Context, Args...>() << packed_arg_bits);
-}
-
-#if defined(__cpp_if_constexpr)
-// This type is intentionally undefined, only used for errors
-template <typename T, typename Char> struct type_is_unformattable_for;
-#endif
-
-template <bool PACKED, typename Context, typename T, FMT_ENABLE_IF(PACKED)>
-FMT_CONSTEXPR FMT_INLINE auto make_arg(T& val) -> value<Context> {
- using arg_type = remove_cvref_t<decltype(arg_mapper<Context>().map(val))>;
-
- constexpr bool formattable_char =
- !std::is_same<arg_type, unformattable_char>::value;
- static_assert(formattable_char, "Mixing character types is disallowed.");
-
- // Formatting of arbitrary pointers is disallowed. If you want to format a
- // pointer cast it to `void*` or `const void*`. In particular, this forbids
- // formatting of `[const] volatile char*` printed as bool by iostreams.
- constexpr bool formattable_pointer =
- !std::is_same<arg_type, unformattable_pointer>::value;
- static_assert(formattable_pointer,
- "Formatting of non-void pointers is disallowed.");
-
- constexpr bool formattable = !std::is_same<arg_type, unformattable>::value;
-#if defined(__cpp_if_constexpr)
- if constexpr (!formattable) {
- type_is_unformattable_for<T, typename Context::char_type> _;
- }
-#endif
- static_assert(
- formattable,
- "Cannot format an argument. To make type T formattable provide a "
- "formatter<T> specialization: https://fmt.dev/latest/api.html#udt");
- return {arg_mapper<Context>().map(val)};
-}
-
-template <typename Context, typename T>
-FMT_CONSTEXPR auto make_arg(T& val) -> basic_format_arg<Context> {
- auto arg = basic_format_arg<Context>();
- arg.type_ = mapped_type_constant<T, Context>::value;
- arg.value_ = make_arg<true, Context>(val);
- return arg;
-}
-
-template <bool PACKED, typename Context, typename T, FMT_ENABLE_IF(!PACKED)>
-FMT_CONSTEXPR inline auto make_arg(T& val) -> basic_format_arg<Context> {
- return make_arg<Context>(val);
-}
-} // namespace detail
-FMT_BEGIN_EXPORT
-
-// A formatting argument. Context is a template parameter for the compiled API
-// where output can be unbuffered.
-template <typename Context> class basic_format_arg {
- private:
- detail::value<Context> value_;
- detail::type type_;
-
- template <typename ContextType, typename T>
- friend FMT_CONSTEXPR auto detail::make_arg(T& value)
- -> basic_format_arg<ContextType>;
-
- template <typename Visitor, typename Ctx>
- friend FMT_CONSTEXPR auto visit_format_arg(Visitor&& vis,
- const basic_format_arg<Ctx>& arg)
- -> decltype(vis(0));
-
- friend class basic_format_args<Context>;
- friend class dynamic_format_arg_store<Context>;
-
- using char_type = typename Context::char_type;
-
- template <typename T, typename Char, size_t NUM_ARGS, size_t NUM_NAMED_ARGS>
- friend struct detail::arg_data;
-
- basic_format_arg(const detail::named_arg_info<char_type>* args, size_t size)
- : value_(args, size) {}
-
- public:
- class handle {
- public:
- explicit handle(detail::custom_value<Context> custom) : custom_(custom) {}
-
- void format(typename Context::parse_context_type& parse_ctx,
- Context& ctx) const {
- custom_.format(custom_.value, parse_ctx, ctx);
- }
-
- private:
- detail::custom_value<Context> custom_;
- };
-
- constexpr basic_format_arg() : type_(detail::type::none_type) {}
-
- constexpr explicit operator bool() const noexcept {
- return type_ != detail::type::none_type;
- }
-
- auto type() const -> detail::type { return type_; }
-
- auto is_integral() const -> bool { return detail::is_integral_type(type_); }
- auto is_arithmetic() const -> bool {
- return detail::is_arithmetic_type(type_);
- }
-
- FMT_INLINE auto format_custom(const char_type* parse_begin,
- typename Context::parse_context_type& parse_ctx,
- Context& ctx) -> bool {
- if (type_ != detail::type::custom_type) return false;
- parse_ctx.advance_to(parse_begin);
- value_.custom.format(value_.custom.value, parse_ctx, ctx);
- return true;
- }
-};
-
-/**
- \rst
- Visits an argument dispatching to the appropriate visit method based on
- the argument type. For example, if the argument type is ``double`` then
- ``vis(value)`` will be called with the value of type ``double``.
- \endrst
- */
-// DEPRECATED!
-template <typename Visitor, typename Context>
-FMT_CONSTEXPR FMT_INLINE auto visit_format_arg(
- Visitor&& vis, const basic_format_arg<Context>& arg) -> decltype(vis(0)) {
- switch (arg.type_) {
- case detail::type::none_type:
- break;
- case detail::type::int_type:
- return vis(arg.value_.int_value);
- case detail::type::uint_type:
- return vis(arg.value_.uint_value);
- case detail::type::long_long_type:
- return vis(arg.value_.long_long_value);
- case detail::type::ulong_long_type:
- return vis(arg.value_.ulong_long_value);
- case detail::type::int128_type:
- return vis(detail::convert_for_visit(arg.value_.int128_value));
- case detail::type::uint128_type:
- return vis(detail::convert_for_visit(arg.value_.uint128_value));
- case detail::type::bool_type:
- return vis(arg.value_.bool_value);
- case detail::type::char_type:
- return vis(arg.value_.char_value);
- case detail::type::float_type:
- return vis(arg.value_.float_value);
- case detail::type::double_type:
- return vis(arg.value_.double_value);
- case detail::type::long_double_type:
- return vis(arg.value_.long_double_value);
- case detail::type::cstring_type:
- return vis(arg.value_.string.data);
- case detail::type::string_type:
- using sv = basic_string_view<typename Context::char_type>;
- return vis(sv(arg.value_.string.data, arg.value_.string.size));
- case detail::type::pointer_type:
- return vis(arg.value_.pointer);
- case detail::type::custom_type:
- return vis(typename basic_format_arg<Context>::handle(arg.value_.custom));
- }
- return vis(monostate());
-}
-
-// Formatting context.
-template <typename OutputIt, typename Char> class basic_format_context {
- private:
- OutputIt out_;
- basic_format_args<basic_format_context> args_;
- detail::locale_ref loc_;
-
- public:
- using iterator = OutputIt;
- using format_arg = basic_format_arg<basic_format_context>;
- using format_args = basic_format_args<basic_format_context>;
- using parse_context_type = basic_format_parse_context<Char>;
- template <typename T> using formatter_type = formatter<T, Char>;
-
- /** The character type for the output. */
- using char_type = Char;
-
- basic_format_context(basic_format_context&&) = default;
- basic_format_context(const basic_format_context&) = delete;
- void operator=(const basic_format_context&) = delete;
- /**
- Constructs a ``basic_format_context`` object. References to the arguments
- are stored in the object so make sure they have appropriate lifetimes.
- */
- constexpr basic_format_context(OutputIt out, format_args ctx_args,
- detail::locale_ref loc = {})
- : out_(out), args_(ctx_args), loc_(loc) {}
-
- constexpr auto arg(int id) const -> format_arg { return args_.get(id); }
- FMT_CONSTEXPR auto arg(basic_string_view<Char> name) -> format_arg {
- return args_.get(name);
- }
- FMT_CONSTEXPR auto arg_id(basic_string_view<Char> name) -> int {
- return args_.get_id(name);
- }
- auto args() const -> const format_args& { return args_; }
-
- // DEPRECATED!
- FMT_CONSTEXPR auto error_handler() -> detail::error_handler { return {}; }
- void on_error(const char* message) { error_handler().on_error(message); }
-
- // Returns an iterator to the beginning of the output range.
- FMT_CONSTEXPR auto out() -> iterator { return out_; }
-
- // Advances the begin iterator to ``it``.
- void advance_to(iterator it) {
- if (!detail::is_back_insert_iterator<iterator>()) out_ = it;
- }
-
- FMT_CONSTEXPR auto locale() -> detail::locale_ref { return loc_; }
-};
-
-template <typename Char>
-using buffer_context =
- basic_format_context<detail::buffer_appender<Char>, Char>;
-using format_context = buffer_context<char>;
-
-template <typename T, typename Char = char>
-using is_formattable = bool_constant<!std::is_base_of<
- detail::unformattable, decltype(detail::arg_mapper<buffer_context<Char>>()
- .map(std::declval<T&>()))>::value>;
-
-/**
- \rst
- An array of references to arguments. It can be implicitly converted into
- `~fmt::basic_format_args` for passing into type-erased formatting functions
- such as `~fmt::vformat`.
- \endrst
- */
-template <typename Context, typename... Args>
-class format_arg_store
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
- // Workaround a GCC template argument substitution bug.
- : public basic_format_args<Context>
-#endif
-{
- private:
- static const size_t num_args = sizeof...(Args);
- static constexpr size_t num_named_args = detail::count_named_args<Args...>();
- static const bool is_packed = num_args <= detail::max_packed_args;
-
- using value_type = conditional_t<is_packed, detail::value<Context>,
- basic_format_arg<Context>>;
-
- detail::arg_data<value_type, typename Context::char_type, num_args,
- num_named_args>
- data_;
-
- friend class basic_format_args<Context>;
-
- static constexpr unsigned long long desc =
- (is_packed ? detail::encode_types<Context, Args...>()
- : detail::is_unpacked_bit | num_args) |
- (num_named_args != 0
- ? static_cast<unsigned long long>(detail::has_named_args_bit)
- : 0);
-
- public:
- template <typename... T>
- FMT_CONSTEXPR FMT_INLINE format_arg_store(T&... args)
- :
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
- basic_format_args<Context>(*this),
-#endif
- data_{detail::make_arg<is_packed, Context>(args)...} {
- if (detail::const_check(num_named_args != 0))
- detail::init_named_args(data_.named_args(), 0, 0, args...);
- }
-};
-
-/**
- \rst
- Constructs a `~fmt::format_arg_store` object that contains references to
- arguments and can be implicitly converted to `~fmt::format_args`. `Context`
- can be omitted in which case it defaults to `~fmt::format_context`.
- See `~fmt::arg` for lifetime considerations.
- \endrst
- */
-// Arguments are taken by lvalue references to avoid some lifetime issues.
-template <typename Context = format_context, typename... T>
-constexpr auto make_format_args(T&... args)
- -> format_arg_store<Context, remove_cvref_t<T>...> {
- return {args...};
-}
-
-/**
- \rst
- Returns a named argument to be used in a formatting function.
- It should only be used in a call to a formatting function or
- `dynamic_format_arg_store::push_back`.
-
- **Example**::
-
- fmt::print("Elapsed time: {s:.2f} seconds", fmt::arg("s", 1.23));
- \endrst
- */
-template <typename Char, typename T>
-inline auto arg(const Char* name, const T& arg) -> detail::named_arg<Char, T> {
- static_assert(!detail::is_named_arg<T>(), "nested named arguments");
- return {name, arg};
-}
-FMT_END_EXPORT
-
-/**
- \rst
- A view of a collection of formatting arguments. To avoid lifetime issues it
- should only be used as a parameter type in type-erased functions such as
- ``vformat``::
-
- void vlog(string_view format_str, format_args args); // OK
- format_args args = make_format_args(); // Error: dangling reference
- \endrst
- */
-template <typename Context> class basic_format_args {
- public:
- using size_type = int;
- using format_arg = basic_format_arg<Context>;
-
- private:
- // A descriptor that contains information about formatting arguments.
- // If the number of arguments is less or equal to max_packed_args then
- // argument types are passed in the descriptor. This reduces binary code size
- // per formatting function call.
- unsigned long long desc_;
- union {
- // If is_packed() returns true then argument values are stored in values_;
- // otherwise they are stored in args_. This is done to improve cache
- // locality and reduce compiled code size since storing larger objects
- // may require more code (at least on x86-64) even if the same amount of
- // data is actually copied to stack. It saves ~10% on the bloat test.
- const detail::value<Context>* values_;
- const format_arg* args_;
- };
-
- constexpr auto is_packed() const -> bool {
- return (desc_ & detail::is_unpacked_bit) == 0;
- }
- auto has_named_args() const -> bool {
- return (desc_ & detail::has_named_args_bit) != 0;
- }
-
- FMT_CONSTEXPR auto type(int index) const -> detail::type {
- int shift = index * detail::packed_arg_bits;
- unsigned int mask = (1 << detail::packed_arg_bits) - 1;
- return static_cast<detail::type>((desc_ >> shift) & mask);
- }
-
- constexpr FMT_INLINE basic_format_args(unsigned long long desc,
- const detail::value<Context>* values)
- : desc_(desc), values_(values) {}
- constexpr basic_format_args(unsigned long long desc, const format_arg* args)
- : desc_(desc), args_(args) {}
-
- public:
- constexpr basic_format_args() : desc_(0), args_(nullptr) {}
-
- /**
- \rst
- Constructs a `basic_format_args` object from `~fmt::format_arg_store`.
- \endrst
- */
- template <typename... Args>
- constexpr FMT_INLINE basic_format_args(
- const format_arg_store<Context, Args...>& store)
- : basic_format_args(format_arg_store<Context, Args...>::desc,
- store.data_.args()) {}
-
- /**
- \rst
- Constructs a `basic_format_args` object from
- `~fmt::dynamic_format_arg_store`.
- \endrst
- */
- constexpr FMT_INLINE basic_format_args(
- const dynamic_format_arg_store<Context>& store)
- : basic_format_args(store.get_types(), store.data()) {}
-
- /**
- \rst
- Constructs a `basic_format_args` object from a dynamic set of arguments.
- \endrst
- */
- constexpr basic_format_args(const format_arg* args, int count)
- : basic_format_args(detail::is_unpacked_bit | detail::to_unsigned(count),
- args) {}
-
- /** Returns the argument with the specified id. */
- FMT_CONSTEXPR auto get(int id) const -> format_arg {
- format_arg arg;
- if (!is_packed()) {
- if (id < max_size()) arg = args_[id];
- return arg;
- }
- if (id >= detail::max_packed_args) return arg;
- arg.type_ = type(id);
- if (arg.type_ == detail::type::none_type) return arg;
- arg.value_ = values_[id];
- return arg;
- }
-
- template <typename Char>
- auto get(basic_string_view<Char> name) const -> format_arg {
- int id = get_id(name);
- return id >= 0 ? get(id) : format_arg();
- }
-
- template <typename Char>
- auto get_id(basic_string_view<Char> name) const -> int {
- if (!has_named_args()) return -1;
- const auto& named_args =
- (is_packed() ? values_[-1] : args_[-1].value_).named_args;
- for (size_t i = 0; i < named_args.size; ++i) {
- if (named_args.data[i].name == name) return named_args.data[i].id;
- }
- return -1;
- }
-
- auto max_size() const -> int {
- unsigned long long max_packed = detail::max_packed_args;
- return static_cast<int>(is_packed() ? max_packed
- : desc_ & ~detail::is_unpacked_bit);
- }
-};
-
-/** An alias to ``basic_format_args<format_context>``. */
-// A separate type would result in shorter symbols but break ABI compatibility
-// between clang and gcc on ARM (#1919).
-FMT_EXPORT using format_args = basic_format_args<format_context>;
-
-// We cannot use enum classes as bit fields because of a gcc bug, so we put them
-// in namespaces instead (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61414).
-// Additionally, if an underlying type is specified, older gcc incorrectly warns
-// that the type is too small. Both bugs are fixed in gcc 9.3.
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 903
-# define FMT_ENUM_UNDERLYING_TYPE(type)
-#else
-# define FMT_ENUM_UNDERLYING_TYPE(type) : type
-#endif
-namespace align {
-enum type FMT_ENUM_UNDERLYING_TYPE(unsigned char){none, left, right, center,
- numeric};
-}
-using align_t = align::type;
-namespace sign {
-enum type FMT_ENUM_UNDERLYING_TYPE(unsigned char){none, minus, plus, space};
-}
-using sign_t = sign::type;
-
-namespace detail {
-
-// Workaround an array initialization issue in gcc 4.8.
-template <typename Char> struct fill_t {
- private:
- enum { max_size = 4 };
- Char data_[max_size] = {Char(' '), Char(0), Char(0), Char(0)};
- unsigned char size_ = 1;
-
- public:
- FMT_CONSTEXPR void operator=(basic_string_view<Char> s) {
- auto size = s.size();
- FMT_ASSERT(size <= max_size, "invalid fill");
- for (size_t i = 0; i < size; ++i) data_[i] = s[i];
- size_ = static_cast<unsigned char>(size);
- }
-
- constexpr auto size() const -> size_t { return size_; }
- constexpr auto data() const -> const Char* { return data_; }
-
- FMT_CONSTEXPR auto operator[](size_t index) -> Char& { return data_[index]; }
- FMT_CONSTEXPR auto operator[](size_t index) const -> const Char& {
- return data_[index];
- }
-};
-} // namespace detail
-
-enum class presentation_type : unsigned char {
- none,
- dec, // 'd'
- oct, // 'o'
- hex_lower, // 'x'
- hex_upper, // 'X'
- bin_lower, // 'b'
- bin_upper, // 'B'
- hexfloat_lower, // 'a'
- hexfloat_upper, // 'A'
- exp_lower, // 'e'
- exp_upper, // 'E'
- fixed_lower, // 'f'
- fixed_upper, // 'F'
- general_lower, // 'g'
- general_upper, // 'G'
- chr, // 'c'
- string, // 's'
- pointer, // 'p'
- debug // '?'
-};
-
-// Format specifiers for built-in and string types.
-template <typename Char = char> struct format_specs {
- int width;
- int precision;
- presentation_type type;
- align_t align : 4;
- sign_t sign : 3;
- bool alt : 1; // Alternate form ('#').
- bool localized : 1;
- detail::fill_t<Char> fill;
-
- constexpr format_specs()
- : width(0),
- precision(-1),
- type(presentation_type::none),
- align(align::none),
- sign(sign::none),
- alt(false),
- localized(false) {}
-};
-
-namespace detail {
-
-enum class arg_id_kind { none, index, name };
-
-// An argument reference.
-template <typename Char> struct arg_ref {
- FMT_CONSTEXPR arg_ref() : kind(arg_id_kind::none), val() {}
-
- FMT_CONSTEXPR explicit arg_ref(int index)
- : kind(arg_id_kind::index), val(index) {}
- FMT_CONSTEXPR explicit arg_ref(basic_string_view<Char> name)
- : kind(arg_id_kind::name), val(name) {}
-
- FMT_CONSTEXPR auto operator=(int idx) -> arg_ref& {
- kind = arg_id_kind::index;
- val.index = idx;
- return *this;
- }
-
- arg_id_kind kind;
- union value {
- FMT_CONSTEXPR value(int idx = 0) : index(idx) {}
- FMT_CONSTEXPR value(basic_string_view<Char> n) : name(n) {}
-
- int index;
- basic_string_view<Char> name;
- } val;
-};
-
-// Format specifiers with width and precision resolved at formatting rather
-// than parsing time to allow reusing the same parsed specifiers with
-// different sets of arguments (precompilation of format strings).
-template <typename Char = char>
-struct dynamic_format_specs : format_specs<Char> {
- arg_ref<Char> width_ref;
- arg_ref<Char> precision_ref;
-};
-
-// Converts a character to ASCII. Returns '\0' on conversion failure.
-template <typename Char, FMT_ENABLE_IF(std::is_integral<Char>::value)>
-constexpr auto to_ascii(Char c) -> char {
- return c <= 0xff ? static_cast<char>(c) : '\0';
-}
-template <typename Char, FMT_ENABLE_IF(std::is_enum<Char>::value)>
-constexpr auto to_ascii(Char c) -> char {
- return c <= 0xff ? static_cast<char>(c) : '\0';
-}
-
-// Returns the number of code units in a code point or 1 on error.
-template <typename Char>
-FMT_CONSTEXPR auto code_point_length(const Char* begin) -> int {
- if (const_check(sizeof(Char) != 1)) return 1;
- auto c = static_cast<unsigned char>(*begin);
- return static_cast<int>((0x3a55000000000000ull >> (2 * (c >> 3))) & 0x3) + 1;
-}
-
-// Return the result via the out param to workaround gcc bug 77539.
-template <bool IS_CONSTEXPR, typename T, typename Ptr = const T*>
-FMT_CONSTEXPR auto find(Ptr first, Ptr last, T value, Ptr& out) -> bool {
- for (out = first; out != last; ++out) {
- if (*out == value) return true;
- }
- return false;
-}
-
-template <>
-inline auto find<false, char>(const char* first, const char* last, char value,
- const char*& out) -> bool {
- out = static_cast<const char*>(
- std::memchr(first, value, to_unsigned(last - first)));
- return out != nullptr;
-}
-
-// Parses the range [begin, end) as an unsigned integer. This function assumes
-// that the range is non-empty and the first character is a digit.
-template <typename Char>
-FMT_CONSTEXPR auto parse_nonnegative_int(const Char*& begin, const Char* end,
- int error_value) noexcept -> int {
- FMT_ASSERT(begin != end && '0' <= *begin && *begin <= '9', "");
- unsigned value = 0, prev = 0;
- auto p = begin;
- do {
- prev = value;
- value = value * 10 + unsigned(*p - '0');
- ++p;
- } while (p != end && '0' <= *p && *p <= '9');
- auto num_digits = p - begin;
- begin = p;
- if (num_digits <= std::numeric_limits<int>::digits10)
- return static_cast<int>(value);
- // Check for overflow.
- const unsigned max = to_unsigned((std::numeric_limits<int>::max)());
- return num_digits == std::numeric_limits<int>::digits10 + 1 &&
- prev * 10ull + unsigned(p[-1] - '0') <= max
- ? static_cast<int>(value)
- : error_value;
-}
-
-FMT_CONSTEXPR inline auto parse_align(char c) -> align_t {
- switch (c) {
- case '<':
- return align::left;
- case '>':
- return align::right;
- case '^':
- return align::center;
- }
- return align::none;
-}
-
-template <typename Char> constexpr auto is_name_start(Char c) -> bool {
- return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || c == '_';
-}
-
-template <typename Char, typename Handler>
-FMT_CONSTEXPR auto do_parse_arg_id(const Char* begin, const Char* end,
- Handler&& handler) -> const Char* {
- Char c = *begin;
- if (c >= '0' && c <= '9') {
- int index = 0;
- constexpr int max = (std::numeric_limits<int>::max)();
- if (c != '0')
- index = parse_nonnegative_int(begin, end, max);
- else
- ++begin;
- if (begin == end || (*begin != '}' && *begin != ':'))
- throw_format_error("invalid format string");
- else
- handler.on_index(index);
- return begin;
- }
- if (!is_name_start(c)) {
- throw_format_error("invalid format string");
- return begin;
- }
- auto it = begin;
- do {
- ++it;
- } while (it != end && (is_name_start(*it) || ('0' <= *it && *it <= '9')));
- handler.on_name({begin, to_unsigned(it - begin)});
- return it;
-}
-
-template <typename Char, typename Handler>
-FMT_CONSTEXPR FMT_INLINE auto parse_arg_id(const Char* begin, const Char* end,
- Handler&& handler) -> const Char* {
- FMT_ASSERT(begin != end, "");
- Char c = *begin;
- if (c != '}' && c != ':') return do_parse_arg_id(begin, end, handler);
- handler.on_auto();
- return begin;
-}
-
-template <typename Char> struct dynamic_spec_id_handler {
- basic_format_parse_context<Char>& ctx;
- arg_ref<Char>& ref;
-
- FMT_CONSTEXPR void on_auto() {
- int id = ctx.next_arg_id();
- ref = arg_ref<Char>(id);
- ctx.check_dynamic_spec(id);
- }
- FMT_CONSTEXPR void on_index(int id) {
- ref = arg_ref<Char>(id);
- ctx.check_arg_id(id);
- ctx.check_dynamic_spec(id);
- }
- FMT_CONSTEXPR void on_name(basic_string_view<Char> id) {
- ref = arg_ref<Char>(id);
- ctx.check_arg_id(id);
- }
-};
-
-// Parses [integer | "{" [arg_id] "}"].
-template <typename Char>
-FMT_CONSTEXPR auto parse_dynamic_spec(const Char* begin, const Char* end,
- int& value, arg_ref<Char>& ref,
- basic_format_parse_context<Char>& ctx)
- -> const Char* {
- FMT_ASSERT(begin != end, "");
- if ('0' <= *begin && *begin <= '9') {
- int val = parse_nonnegative_int(begin, end, -1);
- if (val != -1)
- value = val;
- else
- throw_format_error("number is too big");
- } else if (*begin == '{') {
- ++begin;
- auto handler = dynamic_spec_id_handler<Char>{ctx, ref};
- if (begin != end) begin = parse_arg_id(begin, end, handler);
- if (begin != end && *begin == '}') return ++begin;
- throw_format_error("invalid format string");
- }
- return begin;
-}
-
-template <typename Char>
-FMT_CONSTEXPR auto parse_precision(const Char* begin, const Char* end,
- int& value, arg_ref<Char>& ref,
- basic_format_parse_context<Char>& ctx)
- -> const Char* {
- ++begin;
- if (begin == end || *begin == '}') {
- throw_format_error("invalid precision");
- return begin;
- }
- return parse_dynamic_spec(begin, end, value, ref, ctx);
-}
-
-enum class state { start, align, sign, hash, zero, width, precision, locale };
-
-// Parses standard format specifiers.
-template <typename Char>
-FMT_CONSTEXPR FMT_INLINE auto parse_format_specs(
- const Char* begin, const Char* end, dynamic_format_specs<Char>& specs,
- basic_format_parse_context<Char>& ctx, type arg_type) -> const Char* {
- auto c = '\0';
- if (end - begin > 1) {
- auto next = to_ascii(begin[1]);
- c = parse_align(next) == align::none ? to_ascii(*begin) : '\0';
- } else {
- if (begin == end) return begin;
- c = to_ascii(*begin);
- }
-
- struct {
- state current_state = state::start;
- FMT_CONSTEXPR void operator()(state s, bool valid = true) {
- if (current_state >= s || !valid)
- throw_format_error("invalid format specifier");
- current_state = s;
- }
- } enter_state;
-
- using pres = presentation_type;
- constexpr auto integral_set = sint_set | uint_set | bool_set | char_set;
- struct {
- const Char*& begin;
- dynamic_format_specs<Char>& specs;
- type arg_type;
-
- FMT_CONSTEXPR auto operator()(pres pres_type, int set) -> const Char* {
- if (!in(arg_type, set)) {
- if (arg_type == type::none_type) return begin;
- throw_format_error("invalid format specifier");
- }
- specs.type = pres_type;
- return begin + 1;
- }
- } parse_presentation_type{begin, specs, arg_type};
-
- for (;;) {
- switch (c) {
- case '<':
- case '>':
- case '^':
- enter_state(state::align);
- specs.align = parse_align(c);
- ++begin;
- break;
- case '+':
- case '-':
- case ' ':
- if (arg_type == type::none_type) return begin;
- enter_state(state::sign, in(arg_type, sint_set | float_set));
- switch (c) {
- case '+':
- specs.sign = sign::plus;
- break;
- case '-':
- specs.sign = sign::minus;
- break;
- case ' ':
- specs.sign = sign::space;
- break;
- }
- ++begin;
- break;
- case '#':
- if (arg_type == type::none_type) return begin;
- enter_state(state::hash, is_arithmetic_type(arg_type));
- specs.alt = true;
- ++begin;
- break;
- case '0':
- enter_state(state::zero);
- if (!is_arithmetic_type(arg_type)) {
- if (arg_type == type::none_type) return begin;
- throw_format_error("format specifier requires numeric argument");
- }
- if (specs.align == align::none) {
- // Ignore 0 if align is specified for compatibility with std::format.
- specs.align = align::numeric;
- specs.fill[0] = Char('0');
- }
- ++begin;
- break;
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9':
- case '{':
- enter_state(state::width);
- begin = parse_dynamic_spec(begin, end, specs.width, specs.width_ref, ctx);
- break;
- case '.':
- if (arg_type == type::none_type) return begin;
- enter_state(state::precision,
- in(arg_type, float_set | string_set | cstring_set));
- begin = parse_precision(begin, end, specs.precision, specs.precision_ref,
- ctx);
- break;
- case 'L':
- if (arg_type == type::none_type) return begin;
- enter_state(state::locale, is_arithmetic_type(arg_type));
- specs.localized = true;
- ++begin;
- break;
- case 'd':
- return parse_presentation_type(pres::dec, integral_set);
- case 'o':
- return parse_presentation_type(pres::oct, integral_set);
- case 'x':
- return parse_presentation_type(pres::hex_lower, integral_set);
- case 'X':
- return parse_presentation_type(pres::hex_upper, integral_set);
- case 'b':
- return parse_presentation_type(pres::bin_lower, integral_set);
- case 'B':
- return parse_presentation_type(pres::bin_upper, integral_set);
- case 'a':
- return parse_presentation_type(pres::hexfloat_lower, float_set);
- case 'A':
- return parse_presentation_type(pres::hexfloat_upper, float_set);
- case 'e':
- return parse_presentation_type(pres::exp_lower, float_set);
- case 'E':
- return parse_presentation_type(pres::exp_upper, float_set);
- case 'f':
- return parse_presentation_type(pres::fixed_lower, float_set);
- case 'F':
- return parse_presentation_type(pres::fixed_upper, float_set);
- case 'g':
- return parse_presentation_type(pres::general_lower, float_set);
- case 'G':
- return parse_presentation_type(pres::general_upper, float_set);
- case 'c':
- if (arg_type == type::bool_type)
- throw_format_error("invalid format specifier");
- return parse_presentation_type(pres::chr, integral_set);
- case 's':
- return parse_presentation_type(pres::string,
- bool_set | string_set | cstring_set);
- case 'p':
- return parse_presentation_type(pres::pointer, pointer_set | cstring_set);
- case '?':
- return parse_presentation_type(pres::debug,
- char_set | string_set | cstring_set);
- case '}':
- return begin;
- default: {
- if (*begin == '}') return begin;
- // Parse fill and alignment.
- auto fill_end = begin + code_point_length(begin);
- if (end - fill_end <= 0) {
- throw_format_error("invalid format specifier");
- return begin;
- }
- if (*begin == '{') {
- throw_format_error("invalid fill character '{'");
- return begin;
- }
- auto align = parse_align(to_ascii(*fill_end));
- enter_state(state::align, align != align::none);
- specs.fill = {begin, to_unsigned(fill_end - begin)};
- specs.align = align;
- begin = fill_end + 1;
- }
- }
- if (begin == end) return begin;
- c = to_ascii(*begin);
- }
-}
-
-template <typename Char, typename Handler>
-FMT_CONSTEXPR auto parse_replacement_field(const Char* begin, const Char* end,
- Handler&& handler) -> const Char* {
- struct id_adapter {
- Handler& handler;
- int arg_id;
-
- FMT_CONSTEXPR void on_auto() { arg_id = handler.on_arg_id(); }
- FMT_CONSTEXPR void on_index(int id) { arg_id = handler.on_arg_id(id); }
- FMT_CONSTEXPR void on_name(basic_string_view<Char> id) {
- arg_id = handler.on_arg_id(id);
- }
- };
-
- ++begin;
- if (begin == end) return handler.on_error("invalid format string"), end;
- if (*begin == '}') {
- handler.on_replacement_field(handler.on_arg_id(), begin);
- } else if (*begin == '{') {
- handler.on_text(begin, begin + 1);
- } else {
- auto adapter = id_adapter{handler, 0};
- begin = parse_arg_id(begin, end, adapter);
- Char c = begin != end ? *begin : Char();
- if (c == '}') {
- handler.on_replacement_field(adapter.arg_id, begin);
- } else if (c == ':') {
- begin = handler.on_format_specs(adapter.arg_id, begin + 1, end);
- if (begin == end || *begin != '}')
- return handler.on_error("unknown format specifier"), end;
- } else {
- return handler.on_error("missing '}' in format string"), end;
- }
- }
- return begin + 1;
-}
-
-template <bool IS_CONSTEXPR, typename Char, typename Handler>
-FMT_CONSTEXPR FMT_INLINE void parse_format_string(
- basic_string_view<Char> format_str, Handler&& handler) {
- auto begin = format_str.data();
- auto end = begin + format_str.size();
- if (end - begin < 32) {
- // Use a simple loop instead of memchr for small strings.
- const Char* p = begin;
- while (p != end) {
- auto c = *p++;
- if (c == '{') {
- handler.on_text(begin, p - 1);
- begin = p = parse_replacement_field(p - 1, end, handler);
- } else if (c == '}') {
- if (p == end || *p != '}')
- return handler.on_error("unmatched '}' in format string");
- handler.on_text(begin, p);
- begin = ++p;
- }
- }
- handler.on_text(begin, end);
- return;
- }
- struct writer {
- FMT_CONSTEXPR void operator()(const Char* from, const Char* to) {
- if (from == to) return;
- for (;;) {
- const Char* p = nullptr;
- if (!find<IS_CONSTEXPR>(from, to, Char('}'), p))
- return handler_.on_text(from, to);
- ++p;
- if (p == to || *p != '}')
- return handler_.on_error("unmatched '}' in format string");
- handler_.on_text(from, p);
- from = p + 1;
- }
- }
- Handler& handler_;
- } write = {handler};
- while (begin != end) {
- // Doing two passes with memchr (one for '{' and another for '}') is up to
- // 2.5x faster than the naive one-pass implementation on big format strings.
- const Char* p = begin;
- if (*begin != '{' && !find<IS_CONSTEXPR>(begin + 1, end, Char('{'), p))
- return write(begin, end);
- write(begin, p);
- begin = parse_replacement_field(p, end, handler);
- }
-}
-
-template <typename T, bool = is_named_arg<T>::value> struct strip_named_arg {
- using type = T;
-};
-template <typename T> struct strip_named_arg<T, true> {
- using type = remove_cvref_t<decltype(T::value)>;
-};
-
-template <typename T, typename ParseContext>
-FMT_CONSTEXPR auto parse_format_specs(ParseContext& ctx)
- -> decltype(ctx.begin()) {
- using char_type = typename ParseContext::char_type;
- using context = buffer_context<char_type>;
- using mapped_type = conditional_t<
- mapped_type_constant<T, context>::value != type::custom_type,
- decltype(arg_mapper<context>().map(std::declval<const T&>())),
- typename strip_named_arg<T>::type>;
-#if defined(__cpp_if_constexpr)
- if constexpr (std::is_default_constructible<
- formatter<mapped_type, char_type>>::value) {
- return formatter<mapped_type, char_type>().parse(ctx);
- } else {
- type_is_unformattable_for<T, char_type> _;
- return ctx.begin();
- }
-#else
- return formatter<mapped_type, char_type>().parse(ctx);
-#endif
-}
-
-// Checks char specs and returns true iff the presentation type is char-like.
-template <typename Char>
-FMT_CONSTEXPR auto check_char_specs(const format_specs<Char>& specs) -> bool {
- if (specs.type != presentation_type::none &&
- specs.type != presentation_type::chr &&
- specs.type != presentation_type::debug) {
- return false;
- }
- if (specs.align == align::numeric || specs.sign != sign::none || specs.alt)
- throw_format_error("invalid format specifier for char");
- return true;
-}
-
-#if FMT_USE_NONTYPE_TEMPLATE_ARGS
-template <int N, typename T, typename... Args, typename Char>
-constexpr auto get_arg_index_by_name(basic_string_view<Char> name) -> int {
- if constexpr (is_statically_named_arg<T>()) {
- if (name == T::name) return N;
- }
- if constexpr (sizeof...(Args) > 0)
- return get_arg_index_by_name<N + 1, Args...>(name);
- (void)name; // Workaround an MSVC bug about "unused" parameter.
- return -1;
-}
-#endif
-
-template <typename... Args, typename Char>
-FMT_CONSTEXPR auto get_arg_index_by_name(basic_string_view<Char> name) -> int {
-#if FMT_USE_NONTYPE_TEMPLATE_ARGS
- if constexpr (sizeof...(Args) > 0)
- return get_arg_index_by_name<0, Args...>(name);
-#endif
- (void)name;
- return -1;
-}
-
-template <typename Char, typename... Args> class format_string_checker {
- private:
- using parse_context_type = compile_parse_context<Char>;
- static constexpr int num_args = sizeof...(Args);
-
- // Format specifier parsing function.
- // In the future basic_format_parse_context will replace compile_parse_context
- // here and will use is_constant_evaluated and downcasting to access the data
- // needed for compile-time checks: https://godbolt.org/z/GvWzcTjh1.
- using parse_func = const Char* (*)(parse_context_type&);
-
- type types_[num_args > 0 ? static_cast<size_t>(num_args) : 1];
- parse_context_type context_;
- parse_func parse_funcs_[num_args > 0 ? static_cast<size_t>(num_args) : 1];
-
- public:
- explicit FMT_CONSTEXPR format_string_checker(basic_string_view<Char> fmt)
- : types_{mapped_type_constant<Args, buffer_context<Char>>::value...},
- context_(fmt, num_args, types_),
- parse_funcs_{&parse_format_specs<Args, parse_context_type>...} {}
-
- FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
-
- FMT_CONSTEXPR auto on_arg_id() -> int { return context_.next_arg_id(); }
- FMT_CONSTEXPR auto on_arg_id(int id) -> int {
- return context_.check_arg_id(id), id;
- }
- FMT_CONSTEXPR auto on_arg_id(basic_string_view<Char> id) -> int {
-#if FMT_USE_NONTYPE_TEMPLATE_ARGS
- auto index = get_arg_index_by_name<Args...>(id);
- if (index < 0) on_error("named argument is not found");
- return index;
-#else
- (void)id;
- on_error("compile-time checks for named arguments require C++20 support");
- return 0;
-#endif
- }
-
- FMT_CONSTEXPR void on_replacement_field(int id, const Char* begin) {
- on_format_specs(id, begin, begin); // Call parse() on empty specs.
- }
-
- FMT_CONSTEXPR auto on_format_specs(int id, const Char* begin, const Char*)
- -> const Char* {
- context_.advance_to(begin);
- // id >= 0 check is a workaround for gcc 10 bug (#2065).
- return id >= 0 && id < num_args ? parse_funcs_[id](context_) : begin;
- }
-
- FMT_CONSTEXPR void on_error(const char* message) {
- throw_format_error(message);
- }
-};
-
-// Reports a compile-time error if S is not a valid format string.
-template <typename..., typename S, FMT_ENABLE_IF(!is_compile_string<S>::value)>
-FMT_INLINE void check_format_string(const S&) {
-#ifdef FMT_ENFORCE_COMPILE_STRING
- static_assert(is_compile_string<S>::value,
- "FMT_ENFORCE_COMPILE_STRING requires all format strings to use "
- "FMT_STRING.");
-#endif
-}
-template <typename... Args, typename S,
- FMT_ENABLE_IF(is_compile_string<S>::value)>
-void check_format_string(S format_str) {
- using char_t = typename S::char_type;
- FMT_CONSTEXPR auto s = basic_string_view<char_t>(format_str);
- using checker = format_string_checker<char_t, remove_cvref_t<Args>...>;
- FMT_CONSTEXPR bool error = (parse_format_string<true>(s, checker(s)), true);
- ignore_unused(error);
-}
-
-template <typename Char = char> struct vformat_args {
- using type = basic_format_args<
- basic_format_context<std::back_insert_iterator<buffer<Char>>, Char>>;
-};
-template <> struct vformat_args<char> {
- using type = format_args;
-};
-
-// Use vformat_args and avoid type_identity to keep symbols short.
-template <typename Char>
-void vformat_to(buffer<Char>& buf, basic_string_view<Char> fmt,
- typename vformat_args<Char>::type args, locale_ref loc = {});
-
-FMT_API void vprint_mojibake(std::FILE*, string_view, format_args);
-#ifndef _WIN32
-inline void vprint_mojibake(std::FILE*, string_view, format_args) {}
-#endif
-} // namespace detail
-
-FMT_BEGIN_EXPORT
-
-// A formatter specialization for natively supported types.
-template <typename T, typename Char>
-struct formatter<T, Char,
- enable_if_t<detail::type_constant<T, Char>::value !=
- detail::type::custom_type>> {
- private:
- detail::dynamic_format_specs<Char> specs_;
-
- public:
- template <typename ParseContext>
- FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const Char* {
- auto type = detail::type_constant<T, Char>::value;
- auto end =
- detail::parse_format_specs(ctx.begin(), ctx.end(), specs_, ctx, type);
- if (type == detail::type::char_type) detail::check_char_specs(specs_);
- return end;
- }
-
- template <detail::type U = detail::type_constant<T, Char>::value,
- FMT_ENABLE_IF(U == detail::type::string_type ||
- U == detail::type::cstring_type ||
- U == detail::type::char_type)>
- FMT_CONSTEXPR void set_debug_format(bool set = true) {
- specs_.type = set ? presentation_type::debug : presentation_type::none;
- }
-
- template <typename FormatContext>
- FMT_CONSTEXPR auto format(const T& val, FormatContext& ctx) const
- -> decltype(ctx.out());
-};
-
-template <typename Char = char> struct runtime_format_string {
- basic_string_view<Char> str;
-};
-
-/** A compile-time format string. */
-template <typename Char, typename... Args> class basic_format_string {
- private:
- basic_string_view<Char> str_;
-
- public:
- template <typename S,
- FMT_ENABLE_IF(
- std::is_convertible<const S&, basic_string_view<Char>>::value)>
- FMT_CONSTEVAL FMT_INLINE basic_format_string(const S& s) : str_(s) {
- static_assert(
- detail::count<
- (std::is_base_of<detail::view, remove_reference_t<Args>>::value &&
- std::is_reference<Args>::value)...>() == 0,
- "passing views as lvalues is disallowed");
-#ifdef FMT_HAS_CONSTEVAL
- if constexpr (detail::count_named_args<Args...>() ==
- detail::count_statically_named_args<Args...>()) {
- using checker =
- detail::format_string_checker<Char, remove_cvref_t<Args>...>;
- detail::parse_format_string<true>(str_, checker(s));
- }
-#else
- detail::check_format_string<Args...>(s);
-#endif
- }
- basic_format_string(runtime_format_string<Char> fmt) : str_(fmt.str) {}
-
- FMT_INLINE operator basic_string_view<Char>() const { return str_; }
- FMT_INLINE auto get() const -> basic_string_view<Char> { return str_; }
-};
-
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
-// Workaround broken conversion on older gcc.
-template <typename...> using format_string = string_view;
-inline auto runtime(string_view s) -> string_view { return s; }
-#else
-template <typename... Args>
-using format_string = basic_format_string<char, type_identity_t<Args>...>;
-/**
- \rst
- Creates a runtime format string.
-
- **Example**::
-
- // Check format string at runtime instead of compile-time.
- fmt::print(fmt::runtime("{:d}"), "I am not a number");
- \endrst
- */
-inline auto runtime(string_view s) -> runtime_format_string<> { return {{s}}; }
-#endif
-
-FMT_API auto vformat(string_view fmt, format_args args) -> std::string;
-
-/**
- \rst
- Formats ``args`` according to specifications in ``fmt`` and returns the result
- as a string.
-
- **Example**::
-
- #include <fmt/core.h>
- std::string message = fmt::format("The answer is {}.", 42);
- \endrst
-*/
-template <typename... T>
-FMT_NODISCARD FMT_INLINE auto format(format_string<T...> fmt, T&&... args)
- -> std::string {
- return vformat(fmt, fmt::make_format_args(args...));
-}
-
-/** Formats a string and writes the output to ``out``. */
-template <typename OutputIt,
- FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
-auto vformat_to(OutputIt out, string_view fmt, format_args args) -> OutputIt {
- auto&& buf = detail::get_buffer<char>(out);
- detail::vformat_to(buf, fmt, args, {});
- return detail::get_iterator(buf, out);
-}
-
-/**
- \rst
- Formats ``args`` according to specifications in ``fmt``, writes the result to
- the output iterator ``out`` and returns the iterator past the end of the output
- range. `format_to` does not append a terminating null character.
-
- **Example**::
-
- auto out = std::vector<char>();
- fmt::format_to(std::back_inserter(out), "{}", 42);
- \endrst
- */
-template <typename OutputIt, typename... T,
- FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
-FMT_INLINE auto format_to(OutputIt out, format_string<T...> fmt, T&&... args)
- -> OutputIt {
- return vformat_to(out, fmt, fmt::make_format_args(args...));
-}
-
-template <typename OutputIt> struct format_to_n_result {
- /** Iterator past the end of the output range. */
- OutputIt out;
- /** Total (not truncated) output size. */
- size_t size;
-};
-
-template <typename OutputIt, typename... T,
- FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
-auto vformat_to_n(OutputIt out, size_t n, string_view fmt, format_args args)
- -> format_to_n_result<OutputIt> {
- using traits = detail::fixed_buffer_traits;
- auto buf = detail::iterator_buffer<OutputIt, char, traits>(out, n);
- detail::vformat_to(buf, fmt, args, {});
- return {buf.out(), buf.count()};
-}
-
-/**
- \rst
- Formats ``args`` according to specifications in ``fmt``, writes up to ``n``
- characters of the result to the output iterator ``out`` and returns the total
- (not truncated) output size and the iterator past the end of the output range.
- `format_to_n` does not append a terminating null character.
- \endrst
- */
-template <typename OutputIt, typename... T,
- FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
-FMT_INLINE auto format_to_n(OutputIt out, size_t n, format_string<T...> fmt,
- T&&... args) -> format_to_n_result<OutputIt> {
- return vformat_to_n(out, n, fmt, fmt::make_format_args(args...));
-}
-
-/** Returns the number of chars in the output of ``format(fmt, args...)``. */
-template <typename... T>
-FMT_NODISCARD FMT_INLINE auto formatted_size(format_string<T...> fmt,
- T&&... args) -> size_t {
- auto buf = detail::counting_buffer<>();
- detail::vformat_to<char>(buf, fmt, fmt::make_format_args(args...), {});
- return buf.count();
-}
-
-FMT_API void vprint(string_view fmt, format_args args);
-FMT_API void vprint(std::FILE* f, string_view fmt, format_args args);
-
-/**
- \rst
- Formats ``args`` according to specifications in ``fmt`` and writes the output
- to ``stdout``.
-
- **Example**::
-
- fmt::print("Elapsed time: {0:.2f} seconds", 1.23);
- \endrst
- */
-template <typename... T>
-FMT_INLINE void print(format_string<T...> fmt, T&&... args) {
- const auto& vargs = fmt::make_format_args(args...);
- return detail::is_utf8() ? vprint(fmt, vargs)
- : detail::vprint_mojibake(stdout, fmt, vargs);
-}
-
-/**
- \rst
- Formats ``args`` according to specifications in ``fmt`` and writes the
- output to the file ``f``.
-
- **Example**::
-
- fmt::print(stderr, "Don't {}!", "panic");
- \endrst
- */
-template <typename... T>
-FMT_INLINE void print(std::FILE* f, format_string<T...> fmt, T&&... args) {
- const auto& vargs = fmt::make_format_args(args...);
- return detail::is_utf8() ? vprint(f, fmt, vargs)
- : detail::vprint_mojibake(f, fmt, vargs);
-}
-
-/**
- Formats ``args`` according to specifications in ``fmt`` and writes the
- output to the file ``f`` followed by a newline.
- */
-template <typename... T>
-FMT_INLINE void println(std::FILE* f, format_string<T...> fmt, T&&... args) {
- return fmt::print(f, "{}\n", fmt::format(fmt, std::forward<T>(args)...));
-}
-
-/**
- Formats ``args`` according to specifications in ``fmt`` and writes the output
- to ``stdout`` followed by a newline.
- */
-template <typename... T>
-FMT_INLINE void println(format_string<T...> fmt, T&&... args) {
- return fmt::println(stdout, fmt, std::forward<T>(args)...);
-}
-
-FMT_END_EXPORT
-FMT_GCC_PRAGMA("GCC pop_options")
-FMT_END_NAMESPACE
-
-#ifdef FMT_HEADER_ONLY
-# include "format.h"
-#endif
-#endif // FMT_CORE_H_
+#include "format.h"
#ifndef FMT_FORMAT_INL_H_
#define FMT_FORMAT_INL_H_
-#include <algorithm>
-#include <cerrno> // errno
-#include <climits>
-#include <cmath>
-#include <exception>
-
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
-# include <locale>
+#ifndef FMT_MODULE
+# include <algorithm>
+# include <cerrno> // errno
+# include <climits>
+# include <cmath>
+# include <exception>
#endif
-#if defined(_WIN32) && !defined(FMT_WINDOWS_NO_WCHAR)
+#if defined(_WIN32) && !defined(FMT_USE_WRITE_CONSOLE)
# include <io.h> // _isatty
#endif
#include "format.h"
+#if FMT_USE_LOCALE
+# include <locale>
+#endif
+
+#ifndef FMT_FUNC
+# define FMT_FUNC
+#endif
+
FMT_BEGIN_NAMESPACE
namespace detail {
FMT_FUNC void assert_fail(const char* file, int line, const char* message) {
// Use unchecked std::fprintf to avoid triggering another assertion when
- // writing to stderr fails
- std::fprintf(stderr, "%s:%d: assertion failed: %s", file, line, message);
- // Chosen instead of std::abort to satisfy Clang in CUDA mode during device
- // code pass.
- std::terminate();
-}
-
-FMT_FUNC void throw_format_error(const char* message) {
- FMT_THROW(format_error(message));
+ // writing to stderr fails.
+ fprintf(stderr, "%s:%d: assertion failed: %s", file, line, message);
+ abort();
}
FMT_FUNC void format_error_code(detail::buffer<char>& out, int error_code,
++error_code_size;
}
error_code_size += detail::to_unsigned(detail::count_digits(abs_value));
- auto it = buffer_appender<char>(out);
+ auto it = appender(out);
if (message.size() <= inline_buffer_size - error_code_size)
fmt::format_to(it, FMT_STRING("{}{}"), message, SEP);
fmt::format_to(it, FMT_STRING("{}{}"), ERROR_STR, error_code);
FMT_ASSERT(out.size() <= inline_buffer_size, "");
}
-FMT_FUNC void report_error(format_func func, int error_code,
- const char* message) noexcept {
+FMT_FUNC void do_report_error(format_func func, int error_code,
+ const char* message) noexcept {
memory_buffer full_message;
func(full_message, error_code, message);
- // Don't use fwrite_fully because the latter may throw.
+ // Don't use fwrite_all because the latter may throw.
if (std::fwrite(full_message.data(), full_message.size(), 1, stderr) > 0)
std::fputc('\n', stderr);
}
// A wrapper around fwrite that throws on error.
-inline void fwrite_fully(const void* ptr, size_t count, FILE* stream) {
+inline void fwrite_all(const void* ptr, size_t count, FILE* stream) {
size_t written = std::fwrite(ptr, 1, count, stream);
if (written < count)
FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
}
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+#if FMT_USE_LOCALE
+using std::locale;
+using std::numpunct;
+using std::use_facet;
+
template <typename Locale>
locale_ref::locale_ref(const Locale& loc) : locale_(&loc) {
- static_assert(std::is_same<Locale, std::locale>::value, "");
+ static_assert(std::is_same<Locale, locale>::value, "");
}
+#else
+struct locale {};
+template <typename Char> struct numpunct {
+ auto grouping() const -> std::string { return "\03"; }
+ auto thousands_sep() const -> Char { return ','; }
+ auto decimal_point() const -> Char { return '.'; }
+};
+template <typename Facet> Facet use_facet(locale) { return {}; }
+#endif // FMT_USE_LOCALE
template <typename Locale> auto locale_ref::get() const -> Locale {
- static_assert(std::is_same<Locale, std::locale>::value, "");
- return locale_ ? *static_cast<const std::locale*>(locale_) : std::locale();
+ static_assert(std::is_same<Locale, locale>::value, "");
+#if FMT_USE_LOCALE
+ if (locale_) return *static_cast<const locale*>(locale_);
+#endif
+ return locale();
}
template <typename Char>
FMT_FUNC auto thousands_sep_impl(locale_ref loc) -> thousands_sep_result<Char> {
- auto& facet = std::use_facet<std::numpunct<Char>>(loc.get<std::locale>());
+ auto&& facet = use_facet<numpunct<Char>>(loc.get<locale>());
auto grouping = facet.grouping();
auto thousands_sep = grouping.empty() ? Char() : facet.thousands_sep();
return {std::move(grouping), thousands_sep};
}
template <typename Char>
FMT_FUNC auto decimal_point_impl(locale_ref loc) -> Char {
- return std::use_facet<std::numpunct<Char>>(loc.get<std::locale>())
- .decimal_point();
+ return use_facet<numpunct<Char>>(loc.get<locale>()).decimal_point();
}
-#else
-template <typename Char>
-FMT_FUNC auto thousands_sep_impl(locale_ref) -> thousands_sep_result<Char> {
- return {"\03", FMT_STATIC_THOUSANDS_SEPARATOR};
-}
-template <typename Char> FMT_FUNC Char decimal_point_impl(locale_ref) {
- return '.';
-}
-#endif
+#if FMT_USE_LOCALE
FMT_FUNC auto write_loc(appender out, loc_value value,
- const format_specs<>& specs, locale_ref loc) -> bool {
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+ const format_specs& specs, locale_ref loc) -> bool {
auto locale = loc.get<std::locale>();
// We cannot use the num_put<char> facet because it may produce output in
// a wrong encoding.
using facet = format_facet<std::locale>;
if (std::has_facet<facet>(locale))
- return std::use_facet<facet>(locale).put(out, value, specs);
+ return use_facet<facet>(locale).put(out, value, specs);
return facet(locale).put(out, value, specs);
-#endif
- return false;
}
+#endif
} // namespace detail
+FMT_FUNC void report_error(const char* message) {
+#if FMT_USE_EXCEPTIONS
+ // Use FMT_THROW instead of throw to avoid bogus unreachable code warnings
+ // from MSVC.
+ FMT_THROW(format_error(message));
+#else
+ fputs(message, stderr);
+ abort();
+#endif
+}
+
template <typename Locale> typename Locale::id format_facet<Locale>::id;
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
template <typename Locale> format_facet<Locale>::format_facet(Locale& loc) {
- auto& numpunct = std::use_facet<std::numpunct<char>>(loc);
- grouping_ = numpunct.grouping();
- if (!grouping_.empty()) separator_ = std::string(1, numpunct.thousands_sep());
+ auto& np = detail::use_facet<detail::numpunct<char>>(loc);
+ grouping_ = np.grouping();
+ if (!grouping_.empty()) separator_ = std::string(1, np.thousands_sep());
}
+#if FMT_USE_LOCALE
template <>
FMT_API FMT_FUNC auto format_facet<std::locale>::do_put(
- appender out, loc_value val, const format_specs<>& specs) const -> bool {
+ appender out, loc_value val, const format_specs& specs) const -> bool {
return val.visit(
detail::loc_writer<>{out, specs, separator_, grouping_, decimal_point_});
}
const char* message) noexcept {
FMT_TRY {
auto ec = std::error_code(error_code, std::generic_category());
- write(std::back_inserter(out), std::system_error(ec, message).what());
+ detail::write(appender(out), std::system_error(ec, message).what());
return;
}
FMT_CATCH(...) {}
FMT_FUNC void report_system_error(int error_code,
const char* message) noexcept {
- report_error(format_system_error, error_code, message);
+ do_report_error(format_system_error, error_code, message);
}
FMT_FUNC auto vformat(string_view fmt, format_args args) -> std::string {
}
namespace detail {
-#if !defined(_WIN32) || defined(FMT_WINDOWS_NO_WCHAR)
+
+FMT_FUNC void vformat_to(buffer<char>& buf, string_view fmt, format_args args,
+ locale_ref loc) {
+ auto out = appender(buf);
+ if (fmt.size() == 2 && equal2(fmt.data(), "{}"))
+ return args.get(0).visit(default_arg_formatter<char>{out});
+ parse_format_string(
+ fmt, format_handler<char>{parse_context<char>(fmt), {out, args, loc}});
+}
+
+template <typename T> struct span {
+ T* data;
+ size_t size;
+};
+
+template <typename F> auto flockfile(F* f) -> decltype(_lock_file(f)) {
+ _lock_file(f);
+}
+template <typename F> auto funlockfile(F* f) -> decltype(_unlock_file(f)) {
+ _unlock_file(f);
+}
+
+#ifndef getc_unlocked
+template <typename F> auto getc_unlocked(F* f) -> decltype(_fgetc_nolock(f)) {
+ return _fgetc_nolock(f);
+}
+#endif
+
+template <typename F = FILE, typename Enable = void>
+struct has_flockfile : std::false_type {};
+
+template <typename F>
+struct has_flockfile<F, void_t<decltype(flockfile(&std::declval<F&>()))>>
+ : std::true_type {};
+
+// A FILE wrapper. F is FILE defined as a template parameter to make system API
+// detection work.
+template <typename F> class file_base {
+ public:
+ F* file_;
+
+ public:
+ file_base(F* file) : file_(file) {}
+ operator F*() const { return file_; }
+
+ // Reads a code unit from the stream.
+ auto get() -> int {
+ int result = getc_unlocked(file_);
+ if (result == EOF && ferror(file_) != 0)
+ FMT_THROW(system_error(errno, FMT_STRING("getc failed")));
+ return result;
+ }
+
+ // Puts the code unit back into the stream buffer.
+ void unget(char c) {
+ if (ungetc(c, file_) == EOF)
+ FMT_THROW(system_error(errno, FMT_STRING("ungetc failed")));
+ }
+
+ void flush() { fflush(this->file_); }
+};
+
+// A FILE wrapper for glibc.
+template <typename F> class glibc_file : public file_base<F> {
+ private:
+ enum {
+ line_buffered = 0x200, // _IO_LINE_BUF
+ unbuffered = 2 // _IO_UNBUFFERED
+ };
+
+ public:
+ using file_base<F>::file_base;
+
+ auto is_buffered() const -> bool {
+ return (this->file_->_flags & unbuffered) == 0;
+ }
+
+ void init_buffer() {
+ if (this->file_->_IO_write_ptr) return;
+ // Force buffer initialization by placing and removing a char in a buffer.
+ assume(this->file_->_IO_write_ptr >= this->file_->_IO_write_end);
+ putc_unlocked(0, this->file_);
+ --this->file_->_IO_write_ptr;
+ }
+
+ // Returns the file's read buffer.
+ auto get_read_buffer() const -> span<const char> {
+ auto ptr = this->file_->_IO_read_ptr;
+ return {ptr, to_unsigned(this->file_->_IO_read_end - ptr)};
+ }
+
+ // Returns the file's write buffer.
+ auto get_write_buffer() const -> span<char> {
+ auto ptr = this->file_->_IO_write_ptr;
+ return {ptr, to_unsigned(this->file_->_IO_buf_end - ptr)};
+ }
+
+ void advance_write_buffer(size_t size) { this->file_->_IO_write_ptr += size; }
+
+ bool needs_flush() const {
+ if ((this->file_->_flags & line_buffered) == 0) return false;
+ char* end = this->file_->_IO_write_end;
+ return memchr(end, '\n', to_unsigned(this->file_->_IO_write_ptr - end));
+ }
+
+ void flush() { fflush_unlocked(this->file_); }
+};
+
+// A FILE wrapper for Apple's libc.
+template <typename F> class apple_file : public file_base<F> {
+ private:
+ enum {
+ line_buffered = 1, // __SNBF
+ unbuffered = 2 // __SLBF
+ };
+
+ public:
+ using file_base<F>::file_base;
+
+ auto is_buffered() const -> bool {
+ return (this->file_->_flags & unbuffered) == 0;
+ }
+
+ void init_buffer() {
+ if (this->file_->_p) return;
+ // Force buffer initialization by placing and removing a char in a buffer.
+ putc_unlocked(0, this->file_);
+ --this->file_->_p;
+ ++this->file_->_w;
+ }
+
+ auto get_read_buffer() const -> span<const char> {
+ return {reinterpret_cast<char*>(this->file_->_p),
+ to_unsigned(this->file_->_r)};
+ }
+
+ auto get_write_buffer() const -> span<char> {
+ return {reinterpret_cast<char*>(this->file_->_p),
+ to_unsigned(this->file_->_bf._base + this->file_->_bf._size -
+ this->file_->_p)};
+ }
+
+ void advance_write_buffer(size_t size) {
+ this->file_->_p += size;
+ this->file_->_w -= size;
+ }
+
+ bool needs_flush() const {
+ if ((this->file_->_flags & line_buffered) == 0) return false;
+ return memchr(this->file_->_p + this->file_->_w, '\n',
+ to_unsigned(-this->file_->_w));
+ }
+};
+
+// A fallback FILE wrapper.
+template <typename F> class fallback_file : public file_base<F> {
+ private:
+ char next_; // The next unconsumed character in the buffer.
+ bool has_next_ = false;
+
+ public:
+ using file_base<F>::file_base;
+
+ auto is_buffered() const -> bool { return false; }
+ auto needs_flush() const -> bool { return false; }
+ void init_buffer() {}
+
+ auto get_read_buffer() const -> span<const char> {
+ return {&next_, has_next_ ? 1u : 0u};
+ }
+
+ auto get_write_buffer() const -> span<char> { return {nullptr, 0}; }
+
+ void advance_write_buffer(size_t) {}
+
+ auto get() -> int {
+ has_next_ = false;
+ return file_base<F>::get();
+ }
+
+ void unget(char c) {
+ file_base<F>::unget(c);
+ next_ = c;
+ has_next_ = true;
+ }
+};
+
+#ifndef FMT_USE_FALLBACK_FILE
+# define FMT_USE_FALLBACK_FILE 0
+#endif
+
+template <typename F,
+ FMT_ENABLE_IF(sizeof(F::_p) != 0 && !FMT_USE_FALLBACK_FILE)>
+auto get_file(F* f, int) -> apple_file<F> {
+ return f;
+}
+template <typename F,
+ FMT_ENABLE_IF(sizeof(F::_IO_read_ptr) != 0 && !FMT_USE_FALLBACK_FILE)>
+inline auto get_file(F* f, int) -> glibc_file<F> {
+ return f;
+}
+
+inline auto get_file(FILE* f, ...) -> fallback_file<FILE> { return f; }
+
+using file_ref = decltype(get_file(static_cast<FILE*>(nullptr), 0));
+
+template <typename F = FILE, typename Enable = void>
+class file_print_buffer : public buffer<char> {
+ public:
+ explicit file_print_buffer(F*) : buffer(nullptr, size_t()) {}
+};
+
+template <typename F>
+class file_print_buffer<F, enable_if_t<has_flockfile<F>::value>>
+ : public buffer<char> {
+ private:
+ file_ref file_;
+
+ static void grow(buffer<char>& base, size_t) {
+ auto& self = static_cast<file_print_buffer&>(base);
+ self.file_.advance_write_buffer(self.size());
+ if (self.file_.get_write_buffer().size == 0) self.file_.flush();
+ auto buf = self.file_.get_write_buffer();
+ FMT_ASSERT(buf.size > 0, "");
+ self.set(buf.data, buf.size);
+ self.clear();
+ }
+
+ public:
+ explicit file_print_buffer(F* f) : buffer(grow, size_t()), file_(f) {
+ flockfile(f);
+ file_.init_buffer();
+ auto buf = file_.get_write_buffer();
+ set(buf.data, buf.size);
+ }
+ ~file_print_buffer() {
+ file_.advance_write_buffer(size());
+ bool flush = file_.needs_flush();
+ F* f = file_; // Make funlockfile depend on the template parameter F
+ funlockfile(f); // for the system API detection to work.
+ if (flush) fflush(file_);
+ }
+};
+
+#if !defined(_WIN32) || defined(FMT_USE_WRITE_CONSOLE)
FMT_FUNC auto write_console(int, string_view) -> bool { return false; }
-FMT_FUNC auto write_console(std::FILE*, string_view) -> bool { return false; }
#else
using dword = conditional_t<sizeof(long) == 4, unsigned long, unsigned>;
extern "C" __declspec(dllimport) int __stdcall WriteConsoleW( //
return WriteConsoleW(reinterpret_cast<void*>(_get_osfhandle(fd)), u16.c_str(),
static_cast<dword>(u16.size()), nullptr, nullptr) != 0;
}
-
-FMT_FUNC auto write_console(std::FILE* f, string_view text) -> bool {
- return write_console(_fileno(f), text);
-}
#endif
#ifdef _WIN32
// Print assuming legacy (non-Unicode) encoding.
-FMT_FUNC void vprint_mojibake(std::FILE* f, string_view fmt, format_args args) {
+FMT_FUNC void vprint_mojibake(std::FILE* f, string_view fmt, format_args args,
+ bool newline) {
auto buffer = memory_buffer();
detail::vformat_to(buffer, fmt, args);
- fwrite_fully(buffer.data(), buffer.size(), f);
+ if (newline) buffer.push_back('\n');
+ fwrite_all(buffer.data(), buffer.size(), f);
}
#endif
FMT_FUNC void print(std::FILE* f, string_view text) {
-#ifdef _WIN32
+#if defined(_WIN32) && !defined(FMT_USE_WRITE_CONSOLE)
int fd = _fileno(f);
if (_isatty(fd)) {
std::fflush(f);
if (write_console(fd, text)) return;
}
#endif
- fwrite_fully(text.data(), text.size(), f);
+ fwrite_all(text.data(), text.size(), f);
}
} // namespace detail
+FMT_FUNC void vprint_buffered(std::FILE* f, string_view fmt, format_args args) {
+ auto buffer = memory_buffer();
+ detail::vformat_to(buffer, fmt, args);
+ detail::print(f, {buffer.data(), buffer.size()});
+}
+
FMT_FUNC void vprint(std::FILE* f, string_view fmt, format_args args) {
+ if (!detail::file_ref(f).is_buffered() || !detail::has_flockfile<>())
+ return vprint_buffered(f, fmt, args);
+ auto&& buffer = detail::file_print_buffer<>(f);
+ return detail::vformat_to(buffer, fmt, args);
+}
+
+FMT_FUNC void vprintln(std::FILE* f, string_view fmt, format_args args) {
auto buffer = memory_buffer();
detail::vformat_to(buffer, fmt, args);
+ buffer.push_back('\n');
detail::print(f, {buffer.data(), buffer.size()});
}
template FMT_API auto dragonbox::to_decimal(double x) noexcept
-> dragonbox::decimal_fp<double>;
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+#if FMT_USE_LOCALE
+// DEPRECATED! locale_ref in the detail namespace
template FMT_API locale_ref::locale_ref(const std::locale& loc);
template FMT_API auto locale_ref::get<std::locale>() const -> std::locale;
#endif
-> thousands_sep_result<char>;
template FMT_API auto decimal_point_impl(locale_ref) -> char;
+// DEPRECATED!
template FMT_API void buffer<char>::append(const char*, const char*);
+// DEPRECATED!
template FMT_API void vformat_to(buffer<char>&, string_view,
typename vformat_args<>::type, locale_ref);
#ifndef FMT_FORMAT_H_
#define FMT_FORMAT_H_
-#include <cmath> // std::signbit
-#include <cstdint> // uint32_t
-#include <cstring> // std::memcpy
-#include <initializer_list> // std::initializer_list
-#include <limits> // std::numeric_limits
-#include <memory> // std::uninitialized_copy
-#include <stdexcept> // std::runtime_error
-#include <system_error> // std::system_error
-
-#ifdef __cpp_lib_bit_cast
-# include <bit> // std::bit_cast
+#ifndef _LIBCPP_REMOVE_TRANSITIVE_INCLUDES
+# define _LIBCPP_REMOVE_TRANSITIVE_INCLUDES
+# define FMT_REMOVE_TRANSITIVE_INCLUDES
#endif
-#include "core.h"
+#include "base.h"
+
+#ifndef FMT_MODULE
+# include <cmath> // std::signbit
+# include <cstddef> // std::byte
+# include <cstdint> // uint32_t
+# include <cstring> // std::memcpy
+# include <limits> // std::numeric_limits
+# include <new> // std::bad_alloc
+# if defined(__GLIBCXX__) && !defined(_GLIBCXX_USE_DUAL_ABI)
+// Workaround for pre gcc 5 libstdc++.
+# include <memory> // std::allocator_traits
+# endif
+# include <stdexcept> // std::runtime_error
+# include <string> // std::string
+# include <system_error> // std::system_error
+
+// Check FMT_CPLUSPLUS to avoid a warning in MSVC.
+# if FMT_HAS_INCLUDE(<bit>) && FMT_CPLUSPLUS > 201703L
+# include <bit> // std::bit_cast
+# endif
+
+// libc++ supports string_view in pre-c++17.
+# if FMT_HAS_INCLUDE(<string_view>) && \
+ (FMT_CPLUSPLUS >= 201703L || defined(_LIBCPP_VERSION))
+# include <string_view>
+# define FMT_USE_STRING_VIEW
+# endif
+
+# if FMT_MSC_VERSION
+# include <intrin.h> // _BitScanReverse[64], _umul128
+# endif
+#endif // FMT_MODULE
+
+#if defined(FMT_USE_NONTYPE_TEMPLATE_ARGS)
+// Use the provided definition.
+#elif defined(__NVCOMPILER)
+# define FMT_USE_NONTYPE_TEMPLATE_ARGS 0
+#elif FMT_GCC_VERSION >= 903 && FMT_CPLUSPLUS >= 201709L
+# define FMT_USE_NONTYPE_TEMPLATE_ARGS 1
+#elif defined(__cpp_nontype_template_args) && \
+ __cpp_nontype_template_args >= 201911L
+# define FMT_USE_NONTYPE_TEMPLATE_ARGS 1
+#elif FMT_CLANG_VERSION >= 1200 && FMT_CPLUSPLUS >= 202002L
+# define FMT_USE_NONTYPE_TEMPLATE_ARGS 1
+#else
+# define FMT_USE_NONTYPE_TEMPLATE_ARGS 0
+#endif
#if defined __cpp_inline_variables && __cpp_inline_variables >= 201606L
# define FMT_INLINE_VARIABLE inline
# define FMT_INLINE_VARIABLE
#endif
-#if FMT_HAS_CPP17_ATTRIBUTE(fallthrough)
-# define FMT_FALLTHROUGH [[fallthrough]]
-#elif defined(__clang__)
-# define FMT_FALLTHROUGH [[clang::fallthrough]]
-#elif FMT_GCC_VERSION >= 700 && \
- (!defined(__EDG_VERSION__) || __EDG_VERSION__ >= 520)
-# define FMT_FALLTHROUGH [[gnu::fallthrough]]
+// Check if RTTI is disabled.
+#ifdef FMT_USE_RTTI
+// Use the provided definition.
+#elif defined(__GXX_RTTI) || FMT_HAS_FEATURE(cxx_rtti) || defined(_CPPRTTI) || \
+ defined(__INTEL_RTTI__) || defined(__RTTI)
+// __RTTI is for EDG compilers. _CPPRTTI is for MSVC.
+# define FMT_USE_RTTI 1
#else
-# define FMT_FALLTHROUGH
-#endif
-
-#ifndef FMT_DEPRECATED
-# if FMT_HAS_CPP14_ATTRIBUTE(deprecated) || FMT_MSC_VERSION >= 1900
-# define FMT_DEPRECATED [[deprecated]]
-# else
-# if (defined(__GNUC__) && !defined(__LCC__)) || defined(__clang__)
-# define FMT_DEPRECATED __attribute__((deprecated))
-# elif FMT_MSC_VERSION
-# define FMT_DEPRECATED __declspec(deprecated)
-# else
-# define FMT_DEPRECATED /* deprecated */
-# endif
-# endif
-#endif
-
-#ifndef FMT_NO_UNIQUE_ADDRESS
-# if FMT_CPLUSPLUS >= 202002L
-# if FMT_HAS_CPP_ATTRIBUTE(no_unique_address)
-# define FMT_NO_UNIQUE_ADDRESS [[no_unique_address]]
-// VS2019 v16.10 and later except clang-cl (https://reviews.llvm.org/D110485)
-# elif (FMT_MSC_VERSION >= 1929) && !FMT_CLANG_VERSION
-# define FMT_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]]
-# endif
-# endif
-#endif
-#ifndef FMT_NO_UNIQUE_ADDRESS
-# define FMT_NO_UNIQUE_ADDRESS
+# define FMT_USE_RTTI 0
#endif
// Visibility when compiled as a shared library/object.
# define FMT_SO_VISIBILITY(value)
#endif
-#ifdef __has_builtin
-# define FMT_HAS_BUILTIN(x) __has_builtin(x)
-#else
-# define FMT_HAS_BUILTIN(x) 0
-#endif
-
#if FMT_GCC_VERSION || FMT_CLANG_VERSION
# define FMT_NOINLINE __attribute__((noinline))
#else
# define FMT_NOINLINE
#endif
+namespace std {
+template <typename T> struct iterator_traits<fmt::basic_appender<T>> {
+ using iterator_category = output_iterator_tag;
+ using value_type = T;
+ using difference_type =
+ decltype(static_cast<int*>(nullptr) - static_cast<int*>(nullptr));
+ using pointer = void;
+ using reference = void;
+};
+} // namespace std
+
#ifndef FMT_THROW
-# if FMT_EXCEPTIONS
+# if FMT_USE_EXCEPTIONS
# if FMT_MSC_VERSION || defined(__NVCC__)
FMT_BEGIN_NAMESPACE
namespace detail {
# else
# define FMT_THROW(x) \
::fmt::detail::assert_fail(__FILE__, __LINE__, (x).what())
-# endif
-#endif
-
-#if FMT_EXCEPTIONS
-# define FMT_TRY try
-# define FMT_CATCH(x) catch (x)
-#else
-# define FMT_TRY if (true)
-# define FMT_CATCH(x) if (false)
-#endif
-
-#ifndef FMT_MAYBE_UNUSED
-# if FMT_HAS_CPP17_ATTRIBUTE(maybe_unused)
-# define FMT_MAYBE_UNUSED [[maybe_unused]]
-# else
-# define FMT_MAYBE_UNUSED
-# endif
-#endif
-
-#ifndef FMT_USE_USER_DEFINED_LITERALS
-// EDG based compilers (Intel, NVIDIA, Elbrus, etc), GCC and MSVC support UDLs.
-//
-// GCC before 4.9 requires a space in `operator"" _a` which is invalid in later
-// compiler versions.
-# if (FMT_HAS_FEATURE(cxx_user_literals) || FMT_GCC_VERSION >= 409 || \
- FMT_MSC_VERSION >= 1900) && \
- (!defined(__EDG_VERSION__) || __EDG_VERSION__ >= /* UDL feature */ 480)
-# define FMT_USE_USER_DEFINED_LITERALS 1
-# else
-# define FMT_USE_USER_DEFINED_LITERALS 0
-# endif
-#endif
+# endif // FMT_USE_EXCEPTIONS
+#endif // FMT_THROW
// Defining FMT_REDUCE_INT_INSTANTIATIONS to 1, will reduce the number of
// integer formatter template instantiations to just one by only using the
# define FMT_REDUCE_INT_INSTANTIATIONS 0
#endif
-// __builtin_clz is broken in clang with Microsoft CodeGen:
+FMT_BEGIN_NAMESPACE
+
+template <typename Char, typename Traits, typename Allocator>
+struct is_contiguous<std::basic_string<Char, Traits, Allocator>>
+ : std::true_type {};
+
+namespace detail {
+
+// __builtin_clz is broken in clang with Microsoft codegen:
// https://github.com/fmtlib/fmt/issues/519.
#if !FMT_MSC_VERSION
# if FMT_HAS_BUILTIN(__builtin_clz) || FMT_GCC_VERSION || FMT_ICC_VERSION
# endif
#endif
-// __builtin_ctz is broken in Intel Compiler Classic on Windows:
-// https://github.com/fmtlib/fmt/issues/2510.
-#ifndef __ICL
-# if FMT_HAS_BUILTIN(__builtin_ctz) || FMT_GCC_VERSION || FMT_ICC_VERSION || \
- defined(__NVCOMPILER)
-# define FMT_BUILTIN_CTZ(n) __builtin_ctz(n)
-# endif
-# if FMT_HAS_BUILTIN(__builtin_ctzll) || FMT_GCC_VERSION || \
- FMT_ICC_VERSION || defined(__NVCOMPILER)
-# define FMT_BUILTIN_CTZLL(n) __builtin_ctzll(n)
-# endif
-#endif
-
-#if FMT_MSC_VERSION
-# include <intrin.h> // _BitScanReverse[64], _BitScanForward[64], _umul128
-#endif
-
-// Some compilers masquerade as both MSVC and GCC-likes or otherwise support
+// Some compilers masquerade as both MSVC and GCC but otherwise support
// __builtin_clz and __builtin_clzll, so only define FMT_BUILTIN_CLZ using the
// MSVC intrinsics if the clz and clzll builtins are not available.
-#if FMT_MSC_VERSION && !defined(FMT_BUILTIN_CLZLL) && \
- !defined(FMT_BUILTIN_CTZLL)
-FMT_BEGIN_NAMESPACE
-namespace detail {
+#if FMT_MSC_VERSION && !defined(FMT_BUILTIN_CLZLL)
// Avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning.
-# if !defined(__clang__)
-# pragma intrinsic(_BitScanForward)
+# ifndef __clang__
# pragma intrinsic(_BitScanReverse)
-# if defined(_WIN64)
-# pragma intrinsic(_BitScanForward64)
+# ifdef _WIN64
# pragma intrinsic(_BitScanReverse64)
# endif
# endif
inline auto clz(uint32_t x) -> int {
+ FMT_ASSERT(x != 0, "");
+ FMT_MSC_WARNING(suppress : 6102) // Suppress a bogus static analysis warning.
unsigned long r = 0;
_BitScanReverse(&r, x);
- FMT_ASSERT(x != 0, "");
- // Static analysis complains about using uninitialized data
- // "r", but the only way that can happen is if "x" is 0,
- // which the callers guarantee to not happen.
- FMT_MSC_WARNING(suppress : 6102)
return 31 ^ static_cast<int>(r);
}
# define FMT_BUILTIN_CLZ(n) detail::clz(n)
inline auto clzll(uint64_t x) -> int {
+ FMT_ASSERT(x != 0, "");
+ FMT_MSC_WARNING(suppress : 6102) // Suppress a bogus static analysis warning.
unsigned long r = 0;
# ifdef _WIN64
_BitScanReverse64(&r, x);
// Scan the low 32 bits.
_BitScanReverse(&r, static_cast<uint32_t>(x));
# endif
- FMT_ASSERT(x != 0, "");
- FMT_MSC_WARNING(suppress : 6102) // Suppress a bogus static analysis warning.
return 63 ^ static_cast<int>(r);
}
# define FMT_BUILTIN_CLZLL(n) detail::clzll(n)
-
-inline auto ctz(uint32_t x) -> int {
- unsigned long r = 0;
- _BitScanForward(&r, x);
- FMT_ASSERT(x != 0, "");
- FMT_MSC_WARNING(suppress : 6102) // Suppress a bogus static analysis warning.
- return static_cast<int>(r);
-}
-# define FMT_BUILTIN_CTZ(n) detail::ctz(n)
-
-inline auto ctzll(uint64_t x) -> int {
- unsigned long r = 0;
- FMT_ASSERT(x != 0, "");
- FMT_MSC_WARNING(suppress : 6102) // Suppress a bogus static analysis warning.
-# ifdef _WIN64
- _BitScanForward64(&r, x);
-# else
- // Scan the low 32 bits.
- if (_BitScanForward(&r, static_cast<uint32_t>(x))) return static_cast<int>(r);
- // Scan the high 32 bits.
- _BitScanForward(&r, static_cast<uint32_t>(x >> 32));
- r += 32;
-# endif
- return static_cast<int>(r);
-}
-# define FMT_BUILTIN_CTZLL(n) detail::ctzll(n)
-} // namespace detail
-FMT_END_NAMESPACE
-#endif
-
-FMT_BEGIN_NAMESPACE
-namespace detail {
+#endif // FMT_MSC_VERSION && !defined(FMT_BUILTIN_CLZLL)
FMT_CONSTEXPR inline void abort_fuzzing_if(bool condition) {
ignore_unused(condition);
#endif
}
-template <typename CharT, CharT... C> struct string_literal {
- static constexpr CharT value[sizeof...(C)] = {C...};
- constexpr operator basic_string_view<CharT>() const {
+#if defined(FMT_USE_STRING_VIEW)
+template <typename Char> using std_string_view = std::basic_string_view<Char>;
+#else
+template <typename Char> struct std_string_view {
+ operator basic_string_view<Char>() const;
+};
+#endif
+
+template <typename Char, Char... C> struct string_literal {
+ static constexpr Char value[sizeof...(C)] = {C...};
+ constexpr operator basic_string_view<Char>() const {
return {value, sizeof...(C)};
}
};
-
#if FMT_CPLUSPLUS < 201703L
-template <typename CharT, CharT... C>
-constexpr CharT string_literal<CharT, C...>::value[sizeof...(C)];
+template <typename Char, Char... C>
+constexpr Char string_literal<Char, C...>::value[sizeof...(C)];
#endif
// Implementation of std::bit_cast for pre-C++20.
-> uint128_fallback {
return {~n.hi_, ~n.lo_};
}
- friend auto operator+(const uint128_fallback& lhs,
- const uint128_fallback& rhs) -> uint128_fallback {
+ friend FMT_CONSTEXPR auto operator+(const uint128_fallback& lhs,
+ const uint128_fallback& rhs)
+ -> uint128_fallback {
auto result = uint128_fallback(lhs);
result += rhs;
return result;
}
- friend auto operator*(const uint128_fallback& lhs, uint32_t rhs)
+ friend FMT_CONSTEXPR auto operator*(const uint128_fallback& lhs, uint32_t rhs)
-> uint128_fallback {
FMT_ASSERT(lhs.hi_ == 0, "");
uint64_t hi = (lhs.lo_ >> 32) * rhs;
uint64_t new_lo = (hi << 32) + lo;
return {(hi >> 32) + (new_lo < lo ? 1 : 0), new_lo};
}
- friend auto operator-(const uint128_fallback& lhs, uint64_t rhs)
+ friend constexpr auto operator-(const uint128_fallback& lhs, uint64_t rhs)
-> uint128_fallback {
return {lhs.hi_ - (lhs.lo_ < rhs ? 1 : 0), lhs.lo_ - rhs};
}
}
// std::numeric_limits<T>::digits may return 0 for 128-bit ints.
template <> constexpr auto num_bits<int128_opt>() -> int { return 128; }
-template <> constexpr auto num_bits<uint128_t>() -> int { return 128; }
+template <> constexpr auto num_bits<uint128_opt>() -> int { return 128; }
+template <> constexpr auto num_bits<uint128_fallback>() -> int { return 128; }
// A heterogeneous bit_cast used for converting 96-bit long double to uint128_t
// and 128-bit pointers to uint128_fallback.
template <typename To, typename From, FMT_ENABLE_IF(sizeof(To) > sizeof(From))>
inline auto bit_cast(const From& from) -> To {
- constexpr auto size = static_cast<int>(sizeof(From) / sizeof(unsigned));
+ constexpr auto size = static_cast<int>(sizeof(From) / sizeof(unsigned short));
struct data_t {
- unsigned value[static_cast<unsigned>(size)];
+ unsigned short value[static_cast<unsigned>(size)];
} data = bit_cast<data_t>(from);
auto result = To();
if (const_check(is_big_endian())) {
for (int i = 0; i < size; ++i)
- result = (result << num_bits<unsigned>()) | data.value[i];
+ result = (result << num_bits<unsigned short>()) | data.value[i];
} else {
for (int i = size - 1; i >= 0; --i)
- result = (result << num_bits<unsigned>()) | data.value[i];
+ result = (result << num_bits<unsigned short>()) | data.value[i];
}
return result;
}
#endif
}
-// An approximation of iterator_t for pre-C++20 systems.
-template <typename T>
-using iterator_t = decltype(std::begin(std::declval<T&>()));
-template <typename T> using sentinel_t = decltype(std::end(std::declval<T&>()));
-
-// A workaround for std::string not having mutable data() until C++17.
-template <typename Char>
-inline auto get_data(std::basic_string<Char>& s) -> Char* {
- return &s[0];
-}
-template <typename Container>
-inline auto get_data(Container& c) -> typename Container::value_type* {
- return c.data();
-}
-
// Attempts to reserve space for n extra characters in the output range.
// Returns a pointer to the reserved range or a reference to it.
-template <typename Container, FMT_ENABLE_IF(is_contiguous<Container>::value)>
+template <typename OutputIt,
+ FMT_ENABLE_IF(is_back_insert_iterator<OutputIt>::value&&
+ is_contiguous<typename OutputIt::container>::value)>
#if FMT_CLANG_VERSION >= 307 && !FMT_ICC_VERSION
__attribute__((no_sanitize("undefined")))
#endif
-inline auto
-reserve(std::back_insert_iterator<Container> it, size_t n) ->
- typename Container::value_type* {
- Container& c = get_container(it);
+FMT_CONSTEXPR20 inline auto
+reserve(OutputIt it, size_t n) -> typename OutputIt::value_type* {
+ auto& c = get_container(it);
size_t size = c.size();
c.resize(size + n);
- return get_data(c) + size;
+ return &c[size];
}
template <typename T>
-inline auto reserve(buffer_appender<T> it, size_t n) -> buffer_appender<T> {
+FMT_CONSTEXPR20 inline auto reserve(basic_appender<T> it, size_t n)
+ -> basic_appender<T> {
buffer<T>& buf = get_container(it);
buf.try_reserve(buf.size() + n);
return it;
constexpr auto to_pointer(OutputIt, size_t) -> T* {
return nullptr;
}
-template <typename T> auto to_pointer(buffer_appender<T> it, size_t n) -> T* {
+template <typename T>
+FMT_CONSTEXPR20 auto to_pointer(basic_appender<T> it, size_t n) -> T* {
buffer<T>& buf = get_container(it);
+ buf.try_reserve(buf.size() + n);
auto size = buf.size();
if (buf.capacity() < size + n) return nullptr;
buf.try_resize(size + n);
return buf.data() + size;
}
-template <typename Container, FMT_ENABLE_IF(is_contiguous<Container>::value)>
-inline auto base_iterator(std::back_insert_iterator<Container> it,
- typename Container::value_type*)
- -> std::back_insert_iterator<Container> {
+template <typename OutputIt,
+ FMT_ENABLE_IF(is_back_insert_iterator<OutputIt>::value&&
+ is_contiguous<typename OutputIt::container>::value)>
+inline auto base_iterator(OutputIt it,
+ typename OutputIt::container_type::value_type*)
+ -> OutputIt {
return it;
}
}
template <typename T, typename Size>
FMT_CONSTEXPR20 auto fill_n(T* out, Size count, char value) -> T* {
- if (is_constant_evaluated()) {
- return fill_n<T*, Size, T>(out, count, value);
- }
+ if (is_constant_evaluated()) return fill_n<T*, Size, T>(out, count, value);
std::memset(out, value, to_unsigned(count));
return out + count;
}
-#ifdef __cpp_char8_t
-using char8_type = char8_t;
-#else
-enum char8_type : unsigned char {};
-#endif
-
template <typename OutChar, typename InputIt, typename OutputIt>
-FMT_CONSTEXPR FMT_NOINLINE auto copy_str_noinline(InputIt begin, InputIt end,
- OutputIt out) -> OutputIt {
- return copy_str<OutChar>(begin, end, out);
+FMT_CONSTEXPR FMT_NOINLINE auto copy_noinline(InputIt begin, InputIt end,
+ OutputIt out) -> OutputIt {
+ return copy<OutChar>(begin, end, out);
}
// A public domain branchless UTF-8 decoder by Christopher Wellons:
string_view(ptr, error ? 1 : to_unsigned(end - buf_ptr)));
return result ? (error ? buf_ptr + 1 : end) : nullptr;
};
+
auto p = s.data();
const size_t block_size = 4; // utf8_decode always reads blocks of 4 chars.
if (s.size() >= block_size) {
if (!p) return;
}
}
- if (auto num_chars_left = s.data() + s.size() - p) {
- char buf[2 * block_size - 1] = {};
- copy_str<char>(p, p + num_chars_left, buf);
- const char* buf_ptr = buf;
- do {
- auto end = decode(buf_ptr, p);
- if (!end) return;
- p += end - buf_ptr;
- buf_ptr = end;
- } while (buf_ptr - buf < num_chars_left);
- }
+ auto num_chars_left = to_unsigned(s.data() + s.size() - p);
+ if (num_chars_left == 0) return;
+
+ // Suppress bogus -Wstringop-overflow.
+ if (FMT_GCC_VERSION) num_chars_left &= 3;
+ char buf[2 * block_size - 1] = {};
+ copy<char>(p, p + num_chars_left, buf);
+ const char* buf_ptr = buf;
+ do {
+ auto end = decode(buf_ptr, p);
+ if (!end) return;
+ p += end - buf_ptr;
+ buf_ptr = end;
+ } while (buf_ptr < buf + num_chars_left);
}
template <typename Char>
struct count_code_points {
size_t* count;
FMT_CONSTEXPR auto operator()(uint32_t cp, string_view) const -> bool {
- *count += detail::to_unsigned(
+ *count += to_unsigned(
1 +
(cp >= 0x1100 &&
(cp <= 0x115f || // Hangul Jamo init. consonants
return num_code_points;
}
-inline auto compute_width(basic_string_view<char8_type> s) -> size_t {
- return compute_width(
- string_view(reinterpret_cast<const char*>(s.data()), s.size()));
-}
-
template <typename Char>
inline auto code_point_index(basic_string_view<Char> s, size_t n) -> size_t {
- size_t size = s.size();
- return n < size ? n : size;
+ return min_of(n, s.size());
}
// Calculates the index of the nth code point in a UTF-8 string.
return result;
}
-inline auto code_point_index(basic_string_view<char8_type> s, size_t n)
- -> size_t {
- return code_point_index(
- string_view(reinterpret_cast<const char*>(s.data()), s.size()), n);
-}
-
template <typename T> struct is_integral : std::is_integral<T> {};
template <> struct is_integral<int128_opt> : std::true_type {};
template <> struct is_integral<uint128_t> : std::true_type {};
!std::is_same<T, char>::value &&
!std::is_same<T, wchar_t>::value>;
-#ifndef FMT_USE_FLOAT
-# define FMT_USE_FLOAT 1
-#endif
-#ifndef FMT_USE_DOUBLE
-# define FMT_USE_DOUBLE 1
-#endif
-#ifndef FMT_USE_LONG_DOUBLE
-# define FMT_USE_LONG_DOUBLE 1
-#endif
-
-#ifndef FMT_USE_FLOAT128
-# ifdef __clang__
-// Clang emulates GCC, so it has to appear early.
-# if FMT_HAS_INCLUDE(<quadmath.h>)
-# define FMT_USE_FLOAT128 1
-# endif
-# elif defined(__GNUC__)
-// GNU C++:
-# if defined(_GLIBCXX_USE_FLOAT128) && !defined(__STRICT_ANSI__)
-# define FMT_USE_FLOAT128 1
-# endif
-# endif
-# ifndef FMT_USE_FLOAT128
-# define FMT_USE_FLOAT128 0
-# endif
+#if defined(FMT_USE_FLOAT128)
+// Use the provided definition.
+#elif FMT_CLANG_VERSION && FMT_HAS_INCLUDE(<quadmath.h>)
+# define FMT_USE_FLOAT128 1
+#elif FMT_GCC_VERSION && defined(_GLIBCXX_USE_FLOAT128) && \
+ !defined(__STRICT_ANSI__)
+# define FMT_USE_FLOAT128 1
+#else
+# define FMT_USE_FLOAT128 0
#endif
-
#if FMT_USE_FLOAT128
using float128 = __float128;
#else
-using float128 = void;
+struct float128 {};
#endif
+
template <typename T> using is_float128 = std::is_same<T, float128>;
template <typename T>
# define FMT_USE_FULL_CACHE_DRAGONBOX 0
#endif
-template <typename T>
-template <typename U>
-void buffer<T>::append(const U* begin, const U* end) {
- while (begin != end) {
- auto count = to_unsigned(end - begin);
- try_reserve(size_ + count);
- auto free_cap = capacity_ - size_;
- if (free_cap < count) count = free_cap;
- std::uninitialized_copy_n(begin, count, ptr_ + size_);
- size_ += count;
- begin += count;
+// An allocator that uses malloc/free to allow removing dependency on the C++
+// standard libary runtime.
+template <typename T> struct allocator {
+ using value_type = T;
+
+ T* allocate(size_t n) {
+ FMT_ASSERT(n <= max_value<size_t>() / sizeof(T), "");
+ T* p = static_cast<T*>(malloc(n * sizeof(T)));
+ if (!p) FMT_THROW(std::bad_alloc());
+ return p;
}
-}
-template <typename T, typename Enable = void>
-struct is_locale : std::false_type {};
-template <typename T>
-struct is_locale<T, void_t<decltype(T::classic())>> : std::true_type {};
+ void deallocate(T* p, size_t) { free(p); }
+};
+
} // namespace detail
FMT_BEGIN_EXPORT
enum { inline_buffer_size = 500 };
/**
- \rst
- A dynamically growing memory buffer for trivially copyable/constructible types
- with the first ``SIZE`` elements stored in the object itself.
-
- You can use the ``memory_buffer`` type alias for ``char`` instead.
-
- **Example**::
-
- auto out = fmt::memory_buffer();
- fmt::format_to(std::back_inserter(out), "The answer is {}.", 42);
-
- This will append the following output to the ``out`` object:
-
- .. code-block:: none
-
- The answer is 42.
-
- The output can be converted to an ``std::string`` with ``to_string(out)``.
- \endrst
+ * A dynamically growing memory buffer for trivially copyable/constructible
+ * types with the first `SIZE` elements stored in the object itself. Most
+ * commonly used via the `memory_buffer` alias for `char`.
+ *
+ * **Example**:
+ *
+ * auto out = fmt::memory_buffer();
+ * fmt::format_to(std::back_inserter(out), "The answer is {}.", 42);
+ *
+ * This will append "The answer is 42." to `out`. The buffer content can be
+ * converted to `std::string` with `to_string(out)`.
*/
template <typename T, size_t SIZE = inline_buffer_size,
- typename Allocator = std::allocator<T>>
-class basic_memory_buffer final : public detail::buffer<T> {
+ typename Allocator = detail::allocator<T>>
+class basic_memory_buffer : public detail::buffer<T> {
private:
T store_[SIZE];
if (data != store_) alloc_.deallocate(data, this->capacity());
}
- protected:
- FMT_CONSTEXPR20 void grow(size_t size) override {
+ static FMT_CONSTEXPR20 void grow(detail::buffer<T>& buf, size_t size) {
detail::abort_fuzzing_if(size > 5000);
- const size_t max_size = std::allocator_traits<Allocator>::max_size(alloc_);
- size_t old_capacity = this->capacity();
+ auto& self = static_cast<basic_memory_buffer&>(buf);
+ const size_t max_size =
+ std::allocator_traits<Allocator>::max_size(self.alloc_);
+ size_t old_capacity = buf.capacity();
size_t new_capacity = old_capacity + old_capacity / 2;
if (size > new_capacity)
new_capacity = size;
else if (new_capacity > max_size)
- new_capacity = size > max_size ? size : max_size;
- T* old_data = this->data();
- T* new_data =
- std::allocator_traits<Allocator>::allocate(alloc_, new_capacity);
+ new_capacity = max_of(size, max_size);
+ T* old_data = buf.data();
+ T* new_data = self.alloc_.allocate(new_capacity);
// Suppress a bogus -Wstringop-overflow in gcc 13.1 (#3481).
- detail::assume(this->size() <= new_capacity);
+ detail::assume(buf.size() <= new_capacity);
// The following code doesn't throw, so the raw pointer above doesn't leak.
- std::uninitialized_copy_n(old_data, this->size(), new_data);
- this->set(new_data, new_capacity);
+ memcpy(new_data, old_data, buf.size() * sizeof(T));
+ self.set(new_data, new_capacity);
// deallocate must not throw according to the standard, but even if it does,
// the buffer already uses the new storage and will deallocate it in
// destructor.
- if (old_data != store_) alloc_.deallocate(old_data, old_capacity);
+ if (old_data != self.store_) self.alloc_.deallocate(old_data, old_capacity);
}
public:
using value_type = T;
using const_reference = const T&;
- FMT_CONSTEXPR20 explicit basic_memory_buffer(
+ FMT_CONSTEXPR explicit basic_memory_buffer(
const Allocator& alloc = Allocator())
- : alloc_(alloc) {
+ : detail::buffer<T>(grow), alloc_(alloc) {
this->set(store_, SIZE);
if (detail::is_constant_evaluated()) detail::fill_n(store_, SIZE, T());
}
size_t size = other.size(), capacity = other.capacity();
if (data == other.store_) {
this->set(store_, capacity);
- detail::copy_str<T>(other.store_, other.store_ + size, store_);
+ detail::copy<T>(other.store_, other.store_ + size, store_);
} else {
this->set(data, capacity);
// Set pointer to the inline array so that delete is not called
}
public:
- /**
- \rst
- Constructs a :class:`fmt::basic_memory_buffer` object moving the content
- of the other object to it.
- \endrst
- */
- FMT_CONSTEXPR20 basic_memory_buffer(basic_memory_buffer&& other) noexcept {
+ /// Constructs a `basic_memory_buffer` object moving the content of the other
+ /// object to it.
+ FMT_CONSTEXPR20 basic_memory_buffer(basic_memory_buffer&& other) noexcept
+ : detail::buffer<T>(grow) {
move(other);
}
- /**
- \rst
- Moves the content of the other ``basic_memory_buffer`` object to this one.
- \endrst
- */
+ /// Moves the content of the other `basic_memory_buffer` object to this one.
auto operator=(basic_memory_buffer&& other) noexcept -> basic_memory_buffer& {
FMT_ASSERT(this != &other, "");
deallocate();
// Returns a copy of the allocator associated with this buffer.
auto get_allocator() const -> Allocator { return alloc_; }
- /**
- Resizes the buffer to contain *count* elements. If T is a POD type new
- elements may not be initialized.
- */
- FMT_CONSTEXPR20 void resize(size_t count) { this->try_resize(count); }
+ /// Resizes the buffer to contain `count` elements. If T is a POD type new
+ /// elements may not be initialized.
+ FMT_CONSTEXPR void resize(size_t count) { this->try_resize(count); }
- /** Increases the buffer capacity to *new_capacity*. */
+ /// Increases the buffer capacity to `new_capacity`.
void reserve(size_t new_capacity) { this->try_reserve(new_capacity); }
using detail::buffer<T>::append;
template <typename ContiguousRange>
- void append(const ContiguousRange& range) {
+ FMT_CONSTEXPR20 void append(const ContiguousRange& range) {
append(range.data(), range.data() + range.size());
}
};
using memory_buffer = basic_memory_buffer<char>;
-template <typename T, size_t SIZE, typename Allocator>
-struct is_contiguous<basic_memory_buffer<T, SIZE, Allocator>> : std::true_type {
+template <size_t SIZE>
+FMT_NODISCARD auto to_string(const basic_memory_buffer<char, SIZE>& buf)
+ -> std::string {
+ auto size = buf.size();
+ detail::assume(size < std::string().max_size());
+ return {buf.data(), size};
+}
+
+// A writer to a buffered stream. It doesn't own the underlying stream.
+class writer {
+ private:
+ detail::buffer<char>* buf_;
+
+ // We cannot create a file buffer in advance because any write to a FILE may
+ // invalidate it.
+ FILE* file_;
+
+ public:
+ inline writer(FILE* f) : buf_(nullptr), file_(f) {}
+ inline writer(detail::buffer<char>& buf) : buf_(&buf) {}
+
+ /// Formats `args` according to specifications in `fmt` and writes the
+ /// output to the file.
+ template <typename... T> void print(format_string<T...> fmt, T&&... args) {
+ if (buf_)
+ fmt::format_to(appender(*buf_), fmt, std::forward<T>(args)...);
+ else
+ fmt::print(file_, fmt, std::forward<T>(args)...);
+ }
};
-FMT_END_EXPORT
-namespace detail {
-FMT_API auto write_console(int fd, string_view text) -> bool;
-FMT_API auto write_console(std::FILE* f, string_view text) -> bool;
-FMT_API void print(std::FILE*, string_view);
-} // namespace detail
+class string_buffer {
+ private:
+ std::string str_;
+ detail::container_buffer<std::string> buf_;
-FMT_BEGIN_EXPORT
+ public:
+ inline string_buffer() : buf_(str_) {}
+
+ inline operator writer() { return buf_; }
+ inline std::string& str() { return str_; }
+};
+
+template <typename T, size_t SIZE, typename Allocator>
+struct is_contiguous<basic_memory_buffer<T, SIZE, Allocator>> : std::true_type {
+};
// Suppress a misleading warning in older versions of clang.
-#if FMT_CLANG_VERSION
-# pragma clang diagnostic ignored "-Wweak-vtables"
-#endif
+FMT_PRAGMA_CLANG(diagnostic ignored "-Wweak-vtables")
-/** An error reported from a formatting function. */
+/// An error reported from a formatting function.
class FMT_SO_VISIBILITY("default") format_error : public std::runtime_error {
public:
using std::runtime_error::runtime_error;
};
-namespace detail_exported {
-#if FMT_USE_NONTYPE_TEMPLATE_ARGS
+class loc_value;
+
+FMT_END_EXPORT
+namespace detail {
+FMT_API auto write_console(int fd, string_view text) -> bool;
+FMT_API void print(FILE*, string_view);
+} // namespace detail
+
+namespace detail {
template <typename Char, size_t N> struct fixed_string {
- constexpr fixed_string(const Char (&str)[N]) {
- detail::copy_str<Char, const Char*, Char*>(static_cast<const Char*>(str),
- str + N, data);
+ FMT_CONSTEXPR20 fixed_string(const Char (&s)[N]) {
+ detail::copy<Char, const Char*, Char*>(static_cast<const Char*>(s), s + N,
+ data);
}
Char data[N] = {};
};
-#endif
// Converts a compile-time string to basic_string_view.
-template <typename Char, size_t N>
+FMT_EXPORT template <typename Char, size_t N>
constexpr auto compile_string_to_view(const Char (&s)[N])
-> basic_string_view<Char> {
// Remove trailing NUL character if needed. Won't be present if this is used
// with a raw character array (i.e. not defined as a string).
return {s, N - (std::char_traits<Char>::to_int_type(s[N - 1]) == 0 ? 1 : 0)};
}
-template <typename Char>
-constexpr auto compile_string_to_view(detail::std_string_view<Char> s)
+FMT_EXPORT template <typename Char>
+constexpr auto compile_string_to_view(basic_string_view<Char> s)
-> basic_string_view<Char> {
- return {s.data(), s.size()};
+ return s;
}
-} // namespace detail_exported
-
-class loc_value {
- private:
- basic_format_arg<format_context> value_;
-
- public:
- template <typename T, FMT_ENABLE_IF(!detail::is_float128<T>::value)>
- loc_value(T value) : value_(detail::make_arg<format_context>(value)) {}
-
- template <typename T, FMT_ENABLE_IF(detail::is_float128<T>::value)>
- loc_value(T) {}
-
- template <typename Visitor> auto visit(Visitor&& vis) -> decltype(vis(0)) {
- return visit_format_arg(vis, value_);
- }
-};
-
-// A locale facet that formats values in UTF-8.
-// It is parameterized on the locale to avoid the heavy <locale> include.
-template <typename Locale> class format_facet : public Locale::facet {
- private:
- std::string separator_;
- std::string grouping_;
- std::string decimal_point_;
-
- protected:
- virtual auto do_put(appender out, loc_value val,
- const format_specs<>& specs) const -> bool;
-
- public:
- static FMT_API typename Locale::id id;
-
- explicit format_facet(Locale& loc);
- explicit format_facet(string_view sep = "",
- std::initializer_list<unsigned char> g = {3},
- std::string decimal_point = ".")
- : separator_(sep.data(), sep.size()),
- grouping_(g.begin(), g.end()),
- decimal_point_(decimal_point) {}
-
- auto put(appender out, loc_value val, const format_specs<>& specs) const
- -> bool {
- return do_put(out, val, specs);
- }
-};
-
-namespace detail {
// Returns true if value is negative, false otherwise.
// Same as `value < 0` but doesn't produce warnings if T is an unsigned type.
return false;
}
-template <typename T>
-FMT_CONSTEXPR auto is_supported_floating_point(T) -> bool {
- if (std::is_same<T, float>()) return FMT_USE_FLOAT;
- if (std::is_same<T, double>()) return FMT_USE_DOUBLE;
- if (std::is_same<T, long double>()) return FMT_USE_LONG_DOUBLE;
- return true;
-}
-
// Smallest of uint32_t, uint64_t, uint128_t that is large enough to
// represent all values of an integral type T.
template <typename T>
(factor) * 100000000, (factor) * 1000000000
// Converts value in the range [0, 100) to a string.
-constexpr auto digits2(size_t value) -> const char* {
- // GCC generates slightly better code when value is pointer-size.
- return &"0001020304050607080910111213141516171819"
- "2021222324252627282930313233343536373839"
- "4041424344454647484950515253545556575859"
- "6061626364656667686970717273747576777879"
- "8081828384858687888990919293949596979899"[value * 2];
-}
-
-// Sign is a template parameter to workaround a bug in gcc 4.8.
-template <typename Char, typename Sign> constexpr auto sign(Sign s) -> Char {
-#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 604
- static_assert(std::is_same<Sign, sign_t>::value, "");
-#endif
- return static_cast<Char>("\0-+ "[s]);
+// GCC generates slightly better code when value is pointer-size.
+inline auto digits2(size_t value) -> const char* {
+ // Align data since unaligned access may be slower when crossing a
+ // hardware-specific boundary.
+ alignas(2) static const char data[] =
+ "0001020304050607080910111213141516171819"
+ "2021222324252627282930313233343536373839"
+ "4041424344454647484950515253545556575859"
+ "6061626364656667686970717273747576777879"
+ "8081828384858687888990919293949596979899";
+ return &data[value * 2];
+}
+
+template <typename Char> constexpr auto getsign(sign s) -> Char {
+ return static_cast<char>(((' ' << 24) | ('+' << 16) | ('-' << 8)) >>
+ (static_cast<int>(s) * 8));
}
template <typename T> FMT_CONSTEXPR auto count_digits_fallback(T n) -> int {
// except for n == 0 in which case count_digits returns 1.
FMT_CONSTEXPR20 inline auto count_digits(uint64_t n) -> int {
#ifdef FMT_BUILTIN_CLZLL
- if (!is_constant_evaluated()) {
- return do_count_digits(n);
- }
+ if (!is_constant_evaluated() && !FMT_OPTIMIZE_SIZE) return do_count_digits(n);
#endif
return count_digits_fallback(n);
}
// Optional version of count_digits for better performance on 32-bit platforms.
FMT_CONSTEXPR20 inline auto count_digits(uint32_t n) -> int {
#ifdef FMT_BUILTIN_CLZ
- if (!is_constant_evaluated()) {
- return do_count_digits(n);
- }
+ if (!is_constant_evaluated() && !FMT_OPTIMIZE_SIZE) return do_count_digits(n);
#endif
return count_digits_fallback(n);
}
return decimal_point_impl<wchar_t>(loc);
}
+#ifndef FMT_HEADER_ONLY
+FMT_BEGIN_EXPORT
+extern template FMT_API auto thousands_sep_impl<char>(locale_ref)
+ -> thousands_sep_result<char>;
+extern template FMT_API auto thousands_sep_impl<wchar_t>(locale_ref)
+ -> thousands_sep_result<wchar_t>;
+extern template FMT_API auto decimal_point_impl(locale_ref) -> char;
+extern template FMT_API auto decimal_point_impl(locale_ref) -> wchar_t;
+FMT_END_EXPORT
+#endif // FMT_HEADER_ONLY
+
// Compares two characters for equality.
template <typename Char> auto equal2(const Char* lhs, const char* rhs) -> bool {
return lhs[0] == Char(rhs[0]) && lhs[1] == Char(rhs[1]);
return memcmp(lhs, rhs, 2) == 0;
}
-// Copies two characters from src to dst.
+// Writes a two-digit value to out.
template <typename Char>
-FMT_CONSTEXPR20 FMT_INLINE void copy2(Char* dst, const char* src) {
- if (!is_constant_evaluated() && sizeof(Char) == sizeof(char)) {
- memcpy(dst, src, 2);
+FMT_CONSTEXPR20 FMT_INLINE void write2digits(Char* out, size_t value) {
+ if (!is_constant_evaluated() && std::is_same<Char, char>::value &&
+ !FMT_OPTIMIZE_SIZE) {
+ memcpy(out, digits2(value), 2);
return;
}
- *dst++ = static_cast<Char>(*src++);
- *dst = static_cast<Char>(*src);
+ *out++ = static_cast<Char>('0' + value / 10);
+ *out = static_cast<Char>('0' + value % 10);
}
-template <typename Iterator> struct format_decimal_result {
- Iterator begin;
- Iterator end;
-};
-
-// Formats a decimal unsigned integer value writing into out pointing to a
-// buffer of specified size. The caller must ensure that the buffer is large
-// enough.
+// Formats a decimal unsigned integer value writing to out pointing to a buffer
+// of specified size. The caller must ensure that the buffer is large enough.
template <typename Char, typename UInt>
-FMT_CONSTEXPR20 auto format_decimal(Char* out, UInt value, int size)
- -> format_decimal_result<Char*> {
+FMT_CONSTEXPR20 auto do_format_decimal(Char* out, UInt value, int size)
+ -> Char* {
FMT_ASSERT(size >= count_digits(value), "invalid digit count");
- out += size;
- Char* end = out;
+ unsigned n = to_unsigned(size);
while (value >= 100) {
// Integer division is slow so do it for a group of two digits instead
// of for every digit. The idea comes from the talk by Alexandrescu
// "Three Optimization Tips for C++". See speed-test for a comparison.
- out -= 2;
- copy2(out, digits2(static_cast<size_t>(value % 100)));
+ n -= 2;
+ write2digits(out + n, static_cast<unsigned>(value % 100));
value /= 100;
}
- if (value < 10) {
- *--out = static_cast<Char>('0' + value);
- return {out, end};
+ if (value >= 10) {
+ n -= 2;
+ write2digits(out + n, static_cast<unsigned>(value));
+ } else {
+ out[--n] = static_cast<Char>('0' + value);
}
- out -= 2;
- copy2(out, digits2(static_cast<size_t>(value)));
- return {out, end};
+ return out + n;
}
-template <typename Char, typename UInt, typename Iterator,
- FMT_ENABLE_IF(!std::is_pointer<remove_cvref_t<Iterator>>::value)>
-FMT_CONSTEXPR inline auto format_decimal(Iterator out, UInt value, int size)
- -> format_decimal_result<Iterator> {
+template <typename Char, typename UInt>
+FMT_CONSTEXPR FMT_INLINE auto format_decimal(Char* out, UInt value,
+ int num_digits) -> Char* {
+ do_format_decimal(out, value, num_digits);
+ return out + num_digits;
+}
+
+template <typename Char, typename UInt, typename OutputIt,
+ FMT_ENABLE_IF(!std::is_pointer<remove_cvref_t<OutputIt>>::value)>
+FMT_CONSTEXPR auto format_decimal(OutputIt out, UInt value, int num_digits)
+ -> OutputIt {
+ if (auto ptr = to_pointer<Char>(out, to_unsigned(num_digits))) {
+ do_format_decimal(ptr, value, num_digits);
+ return out;
+ }
// Buffer is large enough to hold all digits (digits10 + 1).
- Char buffer[digits10<UInt>() + 1] = {};
- auto end = format_decimal(buffer, value, size).end;
- return {out, detail::copy_str_noinline<Char>(buffer, end, out)};
+ char buffer[digits10<UInt>() + 1];
+ if (is_constant_evaluated()) fill_n(buffer, sizeof(buffer), '\0');
+ do_format_decimal(buffer, value, num_digits);
+ return copy_noinline<Char>(buffer, buffer + num_digits, out);
}
-template <unsigned BASE_BITS, typename Char, typename UInt>
-FMT_CONSTEXPR auto format_uint(Char* buffer, UInt value, int num_digits,
- bool upper = false) -> Char* {
- buffer += num_digits;
- Char* end = buffer;
+template <typename Char, typename UInt>
+FMT_CONSTEXPR auto do_format_base2e(int base_bits, Char* out, UInt value,
+ int size, bool upper = false) -> Char* {
+ out += size;
do {
const char* digits = upper ? "0123456789ABCDEF" : "0123456789abcdef";
- unsigned digit = static_cast<unsigned>(value & ((1 << BASE_BITS) - 1));
- *--buffer = static_cast<Char>(BASE_BITS < 4 ? static_cast<char>('0' + digit)
- : digits[digit]);
- } while ((value >>= BASE_BITS) != 0);
- return end;
+ unsigned digit = static_cast<unsigned>(value & ((1 << base_bits) - 1));
+ *--out = static_cast<Char>(base_bits < 4 ? static_cast<char>('0' + digit)
+ : digits[digit]);
+ } while ((value >>= base_bits) != 0);
+ return out;
}
-template <unsigned BASE_BITS, typename Char, typename It, typename UInt>
-FMT_CONSTEXPR inline auto format_uint(It out, UInt value, int num_digits,
- bool upper = false) -> It {
+// Formats an unsigned integer in the power of two base (binary, octal, hex).
+template <typename Char, typename UInt>
+FMT_CONSTEXPR auto format_base2e(int base_bits, Char* out, UInt value,
+ int num_digits, bool upper = false) -> Char* {
+ do_format_base2e(base_bits, out, value, num_digits, upper);
+ return out + num_digits;
+}
+
+template <typename Char, typename OutputIt, typename UInt,
+ FMT_ENABLE_IF(is_back_insert_iterator<OutputIt>::value)>
+FMT_CONSTEXPR inline auto format_base2e(int base_bits, OutputIt out, UInt value,
+ int num_digits, bool upper = false)
+ -> OutputIt {
if (auto ptr = to_pointer<Char>(out, to_unsigned(num_digits))) {
- format_uint<BASE_BITS>(ptr, value, num_digits, upper);
+ format_base2e(base_bits, ptr, value, num_digits, upper);
return out;
}
- // Buffer should be large enough to hold all digits (digits / BASE_BITS + 1).
- char buffer[num_bits<UInt>() / BASE_BITS + 1] = {};
- format_uint<BASE_BITS>(buffer, value, num_digits, upper);
- return detail::copy_str_noinline<Char>(buffer, buffer + num_digits, out);
+ // Make buffer large enough for any base.
+ char buffer[num_bits<UInt>()];
+ if (is_constant_evaluated()) fill_n(buffer, sizeof(buffer), '\0');
+ format_base2e(base_bits, buffer, value, num_digits, upper);
+ return detail::copy_noinline<Char>(buffer, buffer + num_digits, out);
}
// A converter from UTF-8 to UTF-16.
public:
FMT_API explicit utf8_to_utf16(string_view s);
- operator basic_string_view<wchar_t>() const { return {&buffer_[0], size()}; }
- auto size() const -> size_t { return buffer_.size() - 1; }
- auto c_str() const -> const wchar_t* { return &buffer_[0]; }
- auto str() const -> std::wstring { return {&buffer_[0], size()}; }
+ inline operator basic_string_view<wchar_t>() const {
+ return {&buffer_[0], size()};
+ }
+ inline auto size() const -> size_t { return buffer_.size() - 1; }
+ inline auto c_str() const -> const wchar_t* { return &buffer_[0]; }
+ inline auto str() const -> std::wstring { return {&buffer_[0], size()}; }
};
enum class to_utf8_error_policy { abort, replace };
if (policy == to_utf8_error_policy::abort) return false;
buf.append(string_view("\xEF\xBF\xBD"));
--p;
+ continue;
} else {
c = (c << 10) + static_cast<uint32_t>(*p) - 0x35fdc00;
}
- } else if (c < 0x80) {
+ }
+ if (c < 0x80) {
buf.push_back(static_cast<char>(c));
} else if (c < 0x800) {
buf.push_back(static_cast<char>(0xc0 | (c >> 6)));
}
// Writes the exponent exp in the form "[+-]d{2,3}" to buffer.
-template <typename Char, typename It>
-FMT_CONSTEXPR auto write_exponent(int exp, It it) -> It {
+template <typename Char, typename OutputIt>
+FMT_CONSTEXPR auto write_exponent(int exp, OutputIt out) -> OutputIt {
FMT_ASSERT(-10000 < exp && exp < 10000, "exponent out of range");
if (exp < 0) {
- *it++ = static_cast<Char>('-');
+ *out++ = static_cast<Char>('-');
exp = -exp;
} else {
- *it++ = static_cast<Char>('+');
+ *out++ = static_cast<Char>('+');
}
- if (exp >= 100) {
- const char* top = digits2(to_unsigned(exp / 100));
- if (exp >= 1000) *it++ = static_cast<Char>(top[0]);
- *it++ = static_cast<Char>(top[1]);
- exp %= 100;
- }
- const char* d = digits2(to_unsigned(exp));
- *it++ = static_cast<Char>(d[0]);
- *it++ = static_cast<Char>(d[1]);
- return it;
+ auto uexp = static_cast<uint32_t>(exp);
+ if (is_constant_evaluated()) {
+ if (uexp < 10) *out++ = '0';
+ return format_decimal<Char>(out, uexp, count_digits(uexp));
+ }
+ if (uexp >= 100u) {
+ const char* top = digits2(uexp / 100);
+ if (uexp >= 1000u) *out++ = static_cast<Char>(top[0]);
+ *out++ = static_cast<Char>(top[1]);
+ uexp %= 100;
+ }
+ const char* d = digits2(uexp);
+ *out++ = static_cast<Char>(d[0]);
+ *out++ = static_cast<Char>(d[1]);
+ return out;
}
// A floating-point number f * pow(2, e) where F is an unsigned type.
return static_cast<convert_float_result<T>>(value);
}
-template <typename OutputIt, typename Char>
+template <typename Char, typename OutputIt>
FMT_NOINLINE FMT_CONSTEXPR auto fill(OutputIt it, size_t n,
- const fill_t<Char>& fill) -> OutputIt {
- auto fill_size = fill.size();
- if (fill_size == 1) return detail::fill_n(it, n, fill[0]);
- auto data = fill.data();
- for (size_t i = 0; i < n; ++i)
- it = copy_str<Char>(data, data + fill_size, it);
+ const basic_specs& specs) -> OutputIt {
+ auto fill_size = specs.fill_size();
+ if (fill_size == 1) return detail::fill_n(it, n, specs.fill_unit<Char>());
+ if (const Char* data = specs.fill<Char>()) {
+ for (size_t i = 0; i < n; ++i) it = copy<Char>(data, data + fill_size, it);
+ }
return it;
}
// Writes the output of f, padded according to format specifications in specs.
// size: output size in code units.
// width: output display width in (terminal) column positions.
-template <align::type align = align::left, typename OutputIt, typename Char,
+template <typename Char, align default_align = align::left, typename OutputIt,
typename F>
-FMT_CONSTEXPR auto write_padded(OutputIt out, const format_specs<Char>& specs,
+FMT_CONSTEXPR auto write_padded(OutputIt out, const format_specs& specs,
size_t size, size_t width, F&& f) -> OutputIt {
- static_assert(align == align::left || align == align::right, "");
+ static_assert(default_align == align::left || default_align == align::right,
+ "");
unsigned spec_width = to_unsigned(specs.width);
size_t padding = spec_width > width ? spec_width - width : 0;
// Shifts are encoded as string literals because static constexpr is not
// supported in constexpr functions.
- auto* shifts = align == align::left ? "\x1f\x1f\x00\x01" : "\x00\x1f\x00\x01";
- size_t left_padding = padding >> shifts[specs.align];
+ auto* shifts =
+ default_align == align::left ? "\x1f\x1f\x00\x01" : "\x00\x1f\x00\x01";
+ size_t left_padding = padding >> shifts[static_cast<int>(specs.align())];
size_t right_padding = padding - left_padding;
- auto it = reserve(out, size + padding * specs.fill.size());
- if (left_padding != 0) it = fill(it, left_padding, specs.fill);
+ auto it = reserve(out, size + padding * specs.fill_size());
+ if (left_padding != 0) it = fill<Char>(it, left_padding, specs);
it = f(it);
- if (right_padding != 0) it = fill(it, right_padding, specs.fill);
+ if (right_padding != 0) it = fill<Char>(it, right_padding, specs);
return base_iterator(out, it);
}
-template <align::type align = align::left, typename OutputIt, typename Char,
+template <typename Char, align default_align = align::left, typename OutputIt,
typename F>
-constexpr auto write_padded(OutputIt out, const format_specs<Char>& specs,
+constexpr auto write_padded(OutputIt out, const format_specs& specs,
size_t size, F&& f) -> OutputIt {
- return write_padded<align>(out, specs, size, size, f);
+ return write_padded<Char, default_align>(out, specs, size, size, f);
}
-template <align::type align = align::left, typename Char, typename OutputIt>
+template <typename Char, align default_align = align::left, typename OutputIt>
FMT_CONSTEXPR auto write_bytes(OutputIt out, string_view bytes,
- const format_specs<Char>& specs) -> OutputIt {
- return write_padded<align>(
+ const format_specs& specs = {}) -> OutputIt {
+ return write_padded<Char, default_align>(
out, specs, bytes.size(), [bytes](reserve_iterator<OutputIt> it) {
const char* data = bytes.data();
- return copy_str<Char>(data, data + bytes.size(), it);
+ return copy<Char>(data, data + bytes.size(), it);
});
}
template <typename Char, typename OutputIt, typename UIntPtr>
-auto write_ptr(OutputIt out, UIntPtr value, const format_specs<Char>* specs)
+auto write_ptr(OutputIt out, UIntPtr value, const format_specs* specs)
-> OutputIt {
int num_digits = count_digits<4>(value);
auto size = to_unsigned(num_digits) + size_t(2);
auto write = [=](reserve_iterator<OutputIt> it) {
*it++ = static_cast<Char>('0');
*it++ = static_cast<Char>('x');
- return format_uint<4, Char>(it, value, num_digits);
+ return format_base2e<Char>(4, it, value, num_digits);
};
- return specs ? write_padded<align::right>(out, *specs, size, write)
+ return specs ? write_padded<Char, align::right>(out, *specs, size, write)
: base_iterator(out, write(reserve(out, size)));
}
FMT_API auto is_printable(uint32_t cp) -> bool;
inline auto needs_escape(uint32_t cp) -> bool {
- return cp < 0x20 || cp == 0x7f || cp == '"' || cp == '\\' ||
- !is_printable(cp);
+ if (cp < 0x20 || cp == 0x7f || cp == '"' || cp == '\\') return true;
+ if (const_check(FMT_OPTIMIZE_SIZE > 1)) return false;
+ return !is_printable(cp);
}
template <typename Char> struct find_escape_result {
uint32_t cp;
};
-template <typename Char>
-using make_unsigned_char =
- typename conditional_t<std::is_integral<Char>::value,
- std::make_unsigned<Char>,
- type_identity<uint32_t>>::type;
-
template <typename Char>
auto find_escape(const Char* begin, const Char* end)
-> find_escape_result<Char> {
for (; begin != end; ++begin) {
- uint32_t cp = static_cast<make_unsigned_char<Char>>(*begin);
+ uint32_t cp = static_cast<unsigned_char<Char>>(*begin);
if (const_check(sizeof(Char) == 1) && cp >= 0x80) continue;
if (needs_escape(cp)) return {begin, begin + 1, cp};
}
inline auto find_escape(const char* begin, const char* end)
-> find_escape_result<char> {
- if (!is_utf8()) return find_escape<char>(begin, end);
+ if (const_check(!use_utf8)) return find_escape<char>(begin, end);
auto result = find_escape_result<char>{end, nullptr, 0};
for_each_codepoint(string_view(begin, to_unsigned(end - begin)),
[&](uint32_t cp, string_view sv) {
return result;
}
-#define FMT_STRING_IMPL(s, base, explicit) \
- [] { \
- /* Use the hidden visibility as a workaround for a GCC bug (#1973). */ \
- /* Use a macro-like name to avoid shadowing warnings. */ \
- struct FMT_VISIBILITY("hidden") FMT_COMPILE_STRING : base { \
- using char_type FMT_MAYBE_UNUSED = fmt::remove_cvref_t<decltype(s[0])>; \
- FMT_MAYBE_UNUSED FMT_CONSTEXPR explicit \
- operator fmt::basic_string_view<char_type>() const { \
- return fmt::detail_exported::compile_string_to_view<char_type>(s); \
- } \
- }; \
- return FMT_COMPILE_STRING(); \
- }()
-
-/**
- \rst
- Constructs a compile-time format string from a string literal *s*.
-
- **Example**::
-
- // A compile-time error because 'd' is an invalid specifier for strings.
- std::string s = fmt::format(FMT_STRING("{:d}"), "foo");
- \endrst
- */
-#define FMT_STRING(s) FMT_STRING_IMPL(s, fmt::detail::compile_string, )
-
template <size_t width, typename Char, typename OutputIt>
auto write_codepoint(OutputIt out, char prefix, uint32_t cp) -> OutputIt {
*out++ = static_cast<Char>('\\');
*out++ = static_cast<Char>(prefix);
Char buf[width];
fill_n(buf, width, static_cast<Char>('0'));
- format_uint<4>(buf, cp, width);
- return copy_str<Char>(buf, buf + width, out);
+ format_base2e(4, buf, cp, width);
+ return copy<Char>(buf, buf + width, out);
}
template <typename OutputIt, typename Char>
*out++ = static_cast<Char>('\\');
c = static_cast<Char>('t');
break;
- case '"':
- FMT_FALLTHROUGH;
- case '\'':
- FMT_FALLTHROUGH;
- case '\\':
- *out++ = static_cast<Char>('\\');
- break;
+ case '"': FMT_FALLTHROUGH;
+ case '\'': FMT_FALLTHROUGH;
+ case '\\': *out++ = static_cast<Char>('\\'); break;
default:
- if (escape.cp < 0x100) {
- return write_codepoint<2, Char>(out, 'x', escape.cp);
- }
- if (escape.cp < 0x10000) {
+ if (escape.cp < 0x100) return write_codepoint<2, Char>(out, 'x', escape.cp);
+ if (escape.cp < 0x10000)
return write_codepoint<4, Char>(out, 'u', escape.cp);
- }
- if (escape.cp < 0x110000) {
+ if (escape.cp < 0x110000)
return write_codepoint<8, Char>(out, 'U', escape.cp);
- }
for (Char escape_char : basic_string_view<Char>(
escape.begin, to_unsigned(escape.end - escape.begin))) {
out = write_codepoint<2, Char>(out, 'x',
auto begin = str.begin(), end = str.end();
do {
auto escape = find_escape(begin, end);
- out = copy_str<Char>(begin, escape.begin, out);
+ out = copy<Char>(begin, escape.begin, out);
begin = escape.end;
if (!begin) break;
out = write_escaped_cp<OutputIt, Char>(out, escape);
template <typename Char, typename OutputIt>
FMT_CONSTEXPR auto write_char(OutputIt out, Char value,
- const format_specs<Char>& specs) -> OutputIt {
- bool is_debug = specs.type == presentation_type::debug;
- return write_padded(out, specs, 1, [=](reserve_iterator<OutputIt> it) {
+ const format_specs& specs) -> OutputIt {
+ bool is_debug = specs.type() == presentation_type::debug;
+ return write_padded<Char>(out, specs, 1, [=](reserve_iterator<OutputIt> it) {
if (is_debug) return write_escaped_char(it, value);
*it++ = value;
return it;
});
}
template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write(OutputIt out, Char value,
- const format_specs<Char>& specs, locale_ref loc = {})
- -> OutputIt {
+FMT_CONSTEXPR auto write(OutputIt out, Char value, const format_specs& specs,
+ locale_ref loc = {}) -> OutputIt {
// char is formatted as unsigned char for consistency across platforms.
using unsigned_type =
conditional_t<std::is_same<Char, char>::value, unsigned char, unsigned>;
return check_char_specs(specs)
- ? write_char(out, value, specs)
- : write(out, static_cast<unsigned_type>(value), specs, loc);
-}
-
-// Data for write_int that doesn't depend on output iterator type. It is used to
-// avoid template code bloat.
-template <typename Char> struct write_int_data {
- size_t size;
- size_t padding;
-
- FMT_CONSTEXPR write_int_data(int num_digits, unsigned prefix,
- const format_specs<Char>& specs)
- : size((prefix >> 24) + to_unsigned(num_digits)), padding(0) {
- if (specs.align == align::numeric) {
- auto width = to_unsigned(specs.width);
- if (width > size) {
- padding = width - size;
- size = width;
- }
- } else if (specs.precision > num_digits) {
- size = (prefix >> 24) + to_unsigned(specs.precision);
- padding = to_unsigned(specs.precision - num_digits);
- }
- }
-};
-
-// Writes an integer in the format
-// <left-padding><prefix><numeric-padding><digits><right-padding>
-// where <digits> are written by write_digits(it).
-// prefix contains chars in three lower bytes and the size in the fourth byte.
-template <typename OutputIt, typename Char, typename W>
-FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, int num_digits,
- unsigned prefix,
- const format_specs<Char>& specs,
- W write_digits) -> OutputIt {
- // Slightly faster check for specs.width == 0 && specs.precision == -1.
- if ((specs.width | (specs.precision + 1)) == 0) {
- auto it = reserve(out, to_unsigned(num_digits) + (prefix >> 24));
- if (prefix != 0) {
- for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
- *it++ = static_cast<Char>(p & 0xff);
- }
- return base_iterator(out, write_digits(it));
- }
- auto data = write_int_data<Char>(num_digits, prefix, specs);
- return write_padded<align::right>(
- out, specs, data.size, [=](reserve_iterator<OutputIt> it) {
- for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
- *it++ = static_cast<Char>(p & 0xff);
- it = detail::fill_n(it, data.padding, static_cast<Char>('0'));
- return write_digits(it);
- });
+ ? write_char<Char>(out, value, specs)
+ : write<Char>(out, static_cast<unsigned_type>(value), specs, loc);
}
template <typename Char> class digit_grouping {
}
public:
- explicit digit_grouping(locale_ref loc, bool localized = true) {
+ template <typename Locale,
+ FMT_ENABLE_IF(std::is_same<Locale, locale_ref>::value)>
+ explicit digit_grouping(Locale loc, bool localized = true) {
if (!localized) return;
auto sep = thousands_sep<Char>(loc);
grouping_ = sep.grouping;
for (int i = 0, sep_index = static_cast<int>(separators.size() - 1);
i < num_digits; ++i) {
if (num_digits - i == separators[sep_index]) {
- out =
- copy_str<Char>(thousands_sep_.data(),
- thousands_sep_.data() + thousands_sep_.size(), out);
+ out = copy<Char>(thousands_sep_.data(),
+ thousands_sep_.data() + thousands_sep_.size(), out);
--sep_index;
}
*out++ = static_cast<Char>(digits[to_unsigned(i)]);
// Writes a decimal integer with digit grouping.
template <typename OutputIt, typename UInt, typename Char>
auto write_int(OutputIt out, UInt value, unsigned prefix,
- const format_specs<Char>& specs,
- const digit_grouping<Char>& grouping) -> OutputIt {
+ const format_specs& specs, const digit_grouping<Char>& grouping)
+ -> OutputIt {
static_assert(std::is_same<uint64_or_128_t<UInt>, UInt>::value, "");
int num_digits = 0;
auto buffer = memory_buffer();
- switch (specs.type) {
+ switch (specs.type()) {
+ default: FMT_ASSERT(false, ""); FMT_FALLTHROUGH;
case presentation_type::none:
- case presentation_type::dec: {
+ case presentation_type::dec:
num_digits = count_digits(value);
format_decimal<char>(appender(buffer), value, num_digits);
break;
- }
- case presentation_type::hex_lower:
- case presentation_type::hex_upper: {
- bool upper = specs.type == presentation_type::hex_upper;
- if (specs.alt)
- prefix_append(prefix, unsigned(upper ? 'X' : 'x') << 8 | '0');
+ case presentation_type::hex:
+ if (specs.alt())
+ prefix_append(prefix, unsigned(specs.upper() ? 'X' : 'x') << 8 | '0');
num_digits = count_digits<4>(value);
- format_uint<4, char>(appender(buffer), value, num_digits, upper);
- break;
- }
- case presentation_type::bin_lower:
- case presentation_type::bin_upper: {
- bool upper = specs.type == presentation_type::bin_upper;
- if (specs.alt)
- prefix_append(prefix, unsigned(upper ? 'B' : 'b') << 8 | '0');
- num_digits = count_digits<1>(value);
- format_uint<1, char>(appender(buffer), value, num_digits);
+ format_base2e<char>(4, appender(buffer), value, num_digits, specs.upper());
break;
- }
- case presentation_type::oct: {
+ case presentation_type::oct:
num_digits = count_digits<3>(value);
// Octal prefix '0' is counted as a digit, so only add it if precision
// is not greater than the number of digits.
- if (specs.alt && specs.precision <= num_digits && value != 0)
+ if (specs.alt() && specs.precision <= num_digits && value != 0)
prefix_append(prefix, '0');
- format_uint<3, char>(appender(buffer), value, num_digits);
+ format_base2e<char>(3, appender(buffer), value, num_digits);
+ break;
+ case presentation_type::bin:
+ if (specs.alt())
+ prefix_append(prefix, unsigned(specs.upper() ? 'B' : 'b') << 8 | '0');
+ num_digits = count_digits<1>(value);
+ format_base2e<char>(1, appender(buffer), value, num_digits);
break;
- }
case presentation_type::chr:
- return write_char(out, static_cast<Char>(value), specs);
- default:
- throw_format_error("invalid format specifier");
+ return write_char<Char>(out, static_cast<Char>(value), specs);
}
unsigned size = (prefix != 0 ? prefix >> 24 : 0) + to_unsigned(num_digits) +
to_unsigned(grouping.count_separators(num_digits));
- return write_padded<align::right>(
+ return write_padded<Char, align::right>(
out, specs, size, size, [&](reserve_iterator<OutputIt> it) {
for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
*it++ = static_cast<Char>(p & 0xff);
});
}
+#if FMT_USE_LOCALE
// Writes a localized value.
-FMT_API auto write_loc(appender out, loc_value value,
- const format_specs<>& specs, locale_ref loc) -> bool;
-template <typename OutputIt, typename Char>
-inline auto write_loc(OutputIt, loc_value, const format_specs<Char>&,
+FMT_API auto write_loc(appender out, loc_value value, const format_specs& specs,
+ locale_ref loc) -> bool;
+#endif
+template <typename OutputIt>
+inline auto write_loc(OutputIt, const loc_value&, const format_specs&,
locale_ref) -> bool {
return false;
}
};
template <typename T>
-FMT_CONSTEXPR auto make_write_int_arg(T value, sign_t sign)
+FMT_CONSTEXPR auto make_write_int_arg(T value, sign s)
-> write_int_arg<uint32_or_64_or_128_t<T>> {
auto prefix = 0u;
auto abs_value = static_cast<uint32_or_64_or_128_t<T>>(value);
} else {
constexpr const unsigned prefixes[4] = {0, 0, 0x1000000u | '+',
0x1000000u | ' '};
- prefix = prefixes[sign];
+ prefix = prefixes[static_cast<int>(s)];
}
return {abs_value, prefix};
}
template <typename Char = char> struct loc_writer {
- buffer_appender<Char> out;
- const format_specs<Char>& specs;
+ basic_appender<Char> out;
+ const format_specs& specs;
std::basic_string<Char> sep;
std::string grouping;
std::basic_string<Char> decimal_point;
template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
auto operator()(T value) -> bool {
- auto arg = make_write_int_arg(value, specs.sign);
+ auto arg = make_write_int_arg(value, specs.sign());
write_int(out, static_cast<uint64_or_128_t<T>>(arg.abs_value), arg.prefix,
specs, digit_grouping<Char>(grouping, sep));
return true;
}
};
+// Size and padding computation separate from write_int to avoid template bloat.
+struct size_padding {
+ unsigned size;
+ unsigned padding;
+
+ FMT_CONSTEXPR size_padding(int num_digits, unsigned prefix,
+ const format_specs& specs)
+ : size((prefix >> 24) + to_unsigned(num_digits)), padding(0) {
+ if (specs.align() == align::numeric) {
+ auto width = to_unsigned(specs.width);
+ if (width > size) {
+ padding = width - size;
+ size = width;
+ }
+ } else if (specs.precision > num_digits) {
+ size = (prefix >> 24) + to_unsigned(specs.precision);
+ padding = to_unsigned(specs.precision - num_digits);
+ }
+ }
+};
+
template <typename Char, typename OutputIt, typename T>
FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, write_int_arg<T> arg,
- const format_specs<Char>& specs,
- locale_ref) -> OutputIt {
+ const format_specs& specs) -> OutputIt {
static_assert(std::is_same<T, uint32_or_64_or_128_t<T>>::value, "");
+
+ constexpr int buffer_size = num_bits<T>();
+ char buffer[buffer_size];
+ if (is_constant_evaluated()) fill_n(buffer, buffer_size, '\0');
+ const char* begin = nullptr;
+ const char* end = buffer + buffer_size;
+
auto abs_value = arg.abs_value;
auto prefix = arg.prefix;
- switch (specs.type) {
+ switch (specs.type()) {
+ default: FMT_ASSERT(false, ""); FMT_FALLTHROUGH;
case presentation_type::none:
- case presentation_type::dec: {
- auto num_digits = count_digits(abs_value);
- return write_int(
- out, num_digits, prefix, specs, [=](reserve_iterator<OutputIt> it) {
- return format_decimal<Char>(it, abs_value, num_digits).end;
- });
- }
- case presentation_type::hex_lower:
- case presentation_type::hex_upper: {
- bool upper = specs.type == presentation_type::hex_upper;
- if (specs.alt)
- prefix_append(prefix, unsigned(upper ? 'X' : 'x') << 8 | '0');
- int num_digits = count_digits<4>(abs_value);
- return write_int(
- out, num_digits, prefix, specs, [=](reserve_iterator<OutputIt> it) {
- return format_uint<4, Char>(it, abs_value, num_digits, upper);
- });
- }
- case presentation_type::bin_lower:
- case presentation_type::bin_upper: {
- bool upper = specs.type == presentation_type::bin_upper;
- if (specs.alt)
- prefix_append(prefix, unsigned(upper ? 'B' : 'b') << 8 | '0');
- int num_digits = count_digits<1>(abs_value);
- return write_int(out, num_digits, prefix, specs,
- [=](reserve_iterator<OutputIt> it) {
- return format_uint<1, Char>(it, abs_value, num_digits);
- });
- }
+ case presentation_type::dec:
+ begin = do_format_decimal(buffer, abs_value, buffer_size);
+ break;
+ case presentation_type::hex:
+ begin = do_format_base2e(4, buffer, abs_value, buffer_size, specs.upper());
+ if (specs.alt())
+ prefix_append(prefix, unsigned(specs.upper() ? 'X' : 'x') << 8 | '0');
+ break;
case presentation_type::oct: {
- int num_digits = count_digits<3>(abs_value);
+ begin = do_format_base2e(3, buffer, abs_value, buffer_size);
// Octal prefix '0' is counted as a digit, so only add it if precision
// is not greater than the number of digits.
- if (specs.alt && specs.precision <= num_digits && abs_value != 0)
+ auto num_digits = end - begin;
+ if (specs.alt() && specs.precision <= num_digits && abs_value != 0)
prefix_append(prefix, '0');
- return write_int(out, num_digits, prefix, specs,
- [=](reserve_iterator<OutputIt> it) {
- return format_uint<3, Char>(it, abs_value, num_digits);
- });
+ break;
}
+ case presentation_type::bin:
+ begin = do_format_base2e(1, buffer, abs_value, buffer_size);
+ if (specs.alt())
+ prefix_append(prefix, unsigned(specs.upper() ? 'B' : 'b') << 8 | '0');
+ break;
case presentation_type::chr:
- return write_char(out, static_cast<Char>(abs_value), specs);
- default:
- throw_format_error("invalid format specifier");
+ return write_char<Char>(out, static_cast<Char>(abs_value), specs);
}
- return out;
+
+ // Write an integer in the format
+ // <left-padding><prefix><numeric-padding><digits><right-padding>
+ // prefix contains chars in three lower bytes and the size in the fourth byte.
+ int num_digits = static_cast<int>(end - begin);
+ // Slightly faster check for specs.width == 0 && specs.precision == -1.
+ if ((specs.width | (specs.precision + 1)) == 0) {
+ auto it = reserve(out, to_unsigned(num_digits) + (prefix >> 24));
+ for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
+ *it++ = static_cast<Char>(p & 0xff);
+ return base_iterator(out, copy<Char>(begin, end, it));
+ }
+ auto sp = size_padding(num_digits, prefix, specs);
+ unsigned padding = sp.padding;
+ return write_padded<Char, align::right>(
+ out, specs, sp.size, [=](reserve_iterator<OutputIt> it) {
+ for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
+ *it++ = static_cast<Char>(p & 0xff);
+ it = detail::fill_n(it, padding, static_cast<Char>('0'));
+ return copy<Char>(begin, end, it);
+ });
}
+
template <typename Char, typename OutputIt, typename T>
-FMT_CONSTEXPR FMT_NOINLINE auto write_int_noinline(
- OutputIt out, write_int_arg<T> arg, const format_specs<Char>& specs,
- locale_ref loc) -> OutputIt {
- return write_int(out, arg, specs, loc);
+FMT_CONSTEXPR FMT_NOINLINE auto write_int_noinline(OutputIt out,
+ write_int_arg<T> arg,
+ const format_specs& specs)
+ -> OutputIt {
+ return write_int<Char>(out, arg, specs);
}
-template <typename Char, typename OutputIt, typename T,
+
+template <typename Char, typename T,
FMT_ENABLE_IF(is_integral<T>::value &&
!std::is_same<T, bool>::value &&
- std::is_same<OutputIt, buffer_appender<Char>>::value)>
-FMT_CONSTEXPR FMT_INLINE auto write(OutputIt out, T value,
- const format_specs<Char>& specs,
- locale_ref loc) -> OutputIt {
- if (specs.localized && write_loc(out, value, specs, loc)) return out;
- return write_int_noinline(out, make_write_int_arg(value, specs.sign), specs,
- loc);
+ !std::is_same<T, Char>::value)>
+FMT_CONSTEXPR FMT_INLINE auto write(basic_appender<Char> out, T value,
+ const format_specs& specs, locale_ref loc)
+ -> basic_appender<Char> {
+ if (specs.localized() && write_loc(out, value, specs, loc)) return out;
+ return write_int_noinline<Char>(out, make_write_int_arg(value, specs.sign()),
+ specs);
}
+
// An inlined version of write used in format string compilation.
template <typename Char, typename OutputIt, typename T,
FMT_ENABLE_IF(is_integral<T>::value &&
!std::is_same<T, bool>::value &&
- !std::is_same<OutputIt, buffer_appender<Char>>::value)>
+ !std::is_same<T, Char>::value &&
+ !std::is_same<OutputIt, basic_appender<Char>>::value)>
FMT_CONSTEXPR FMT_INLINE auto write(OutputIt out, T value,
- const format_specs<Char>& specs,
- locale_ref loc) -> OutputIt {
- if (specs.localized && write_loc(out, value, specs, loc)) return out;
- return write_int(out, make_write_int_arg(value, specs.sign), specs, loc);
+ const format_specs& specs, locale_ref loc)
+ -> OutputIt {
+ if (specs.localized() && write_loc(out, value, specs, loc)) return out;
+ return write_int<Char>(out, make_write_int_arg(value, specs.sign()), specs);
}
-// An output iterator that counts the number of objects written to it and
-// discards them.
-class counting_iterator {
- private:
- size_t count_;
-
- public:
- using iterator_category = std::output_iterator_tag;
- using difference_type = std::ptrdiff_t;
- using pointer = void;
- using reference = void;
- FMT_UNCHECKED_ITERATOR(counting_iterator);
-
- struct value_type {
- template <typename T> FMT_CONSTEXPR void operator=(const T&) {}
- };
-
- FMT_CONSTEXPR counting_iterator() : count_(0) {}
-
- FMT_CONSTEXPR auto count() const -> size_t { return count_; }
-
- FMT_CONSTEXPR auto operator++() -> counting_iterator& {
- ++count_;
- return *this;
- }
- FMT_CONSTEXPR auto operator++(int) -> counting_iterator {
- auto it = *this;
- ++*this;
- return it;
- }
-
- FMT_CONSTEXPR friend auto operator+(counting_iterator it, difference_type n)
- -> counting_iterator {
- it.count_ += static_cast<size_t>(n);
- return it;
- }
-
- FMT_CONSTEXPR auto operator*() const -> value_type { return {}; }
-};
-
template <typename Char, typename OutputIt>
FMT_CONSTEXPR auto write(OutputIt out, basic_string_view<Char> s,
- const format_specs<Char>& specs) -> OutputIt {
+ const format_specs& specs) -> OutputIt {
auto data = s.data();
auto size = s.size();
if (specs.precision >= 0 && to_unsigned(specs.precision) < size)
size = code_point_index(s, to_unsigned(specs.precision));
- bool is_debug = specs.type == presentation_type::debug;
+
+ bool is_debug = specs.type() == presentation_type::debug;
+ if (is_debug) {
+ auto buf = counting_buffer<Char>();
+ write_escaped_string(basic_appender<Char>(buf), s);
+ size = buf.count();
+ }
+
size_t width = 0;
if (specs.width != 0) {
- if (is_debug)
- width = write_escaped_string(counting_iterator{}, s).count();
- else
- width = compute_width(basic_string_view<Char>(data, size));
+ width =
+ is_debug ? size : compute_width(basic_string_view<Char>(data, size));
}
- return write_padded(out, specs, size, width,
- [=](reserve_iterator<OutputIt> it) {
- if (is_debug) return write_escaped_string(it, s);
- return copy_str<Char>(data, data + size, it);
- });
+ return write_padded<Char>(
+ out, specs, size, width, [=](reserve_iterator<OutputIt> it) {
+ return is_debug ? write_escaped_string(it, s)
+ : copy<Char>(data, data + size, it);
+ });
}
template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write(OutputIt out,
- basic_string_view<type_identity_t<Char>> s,
- const format_specs<Char>& specs, locale_ref)
- -> OutputIt {
- return write(out, s, specs);
+FMT_CONSTEXPR auto write(OutputIt out, basic_string_view<Char> s,
+ const format_specs& specs, locale_ref) -> OutputIt {
+ return write<Char>(out, s, specs);
}
template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write(OutputIt out, const Char* s,
- const format_specs<Char>& specs, locale_ref)
- -> OutputIt {
- if (specs.type == presentation_type::pointer)
+FMT_CONSTEXPR auto write(OutputIt out, const Char* s, const format_specs& specs,
+ locale_ref) -> OutputIt {
+ if (specs.type() == presentation_type::pointer)
return write_ptr<Char>(out, bit_cast<uintptr_t>(s), &specs);
- if (!s) throw_format_error("string pointer is null");
- return write(out, basic_string_view<Char>(s), specs, {});
+ if (!s) report_error("string pointer is null");
+ return write<Char>(out, basic_string_view<Char>(s), specs, {});
}
template <typename Char, typename OutputIt, typename T,
if (negative) abs_value = ~abs_value + 1;
int num_digits = count_digits(abs_value);
auto size = (negative ? 1 : 0) + static_cast<size_t>(num_digits);
- auto it = reserve(out, size);
- if (auto ptr = to_pointer<Char>(it, size)) {
+ if (auto ptr = to_pointer<Char>(out, size)) {
if (negative) *ptr++ = static_cast<Char>('-');
format_decimal<Char>(ptr, abs_value, num_digits);
return out;
}
- if (negative) *it++ = static_cast<Char>('-');
- it = format_decimal<Char>(it, abs_value, num_digits).end;
- return base_iterator(out, it);
+ if (negative) *out++ = static_cast<Char>('-');
+ return format_decimal<Char>(out, abs_value, num_digits);
}
-// DEPRECATED!
template <typename Char>
FMT_CONSTEXPR auto parse_align(const Char* begin, const Char* end,
- format_specs<Char>& specs) -> const Char* {
+ format_specs& specs) -> const Char* {
FMT_ASSERT(begin != end, "");
- auto align = align::none;
+ auto alignment = align::none;
auto p = begin + code_point_length(begin);
if (end - p <= 0) p = begin;
for (;;) {
switch (to_ascii(*p)) {
- case '<':
- align = align::left;
- break;
- case '>':
- align = align::right;
- break;
- case '^':
- align = align::center;
- break;
+ case '<': alignment = align::left; break;
+ case '>': alignment = align::right; break;
+ case '^': alignment = align::center; break;
}
- if (align != align::none) {
+ if (alignment != align::none) {
if (p != begin) {
auto c = *begin;
if (c == '}') return begin;
if (c == '{') {
- throw_format_error("invalid fill character '{'");
+ report_error("invalid fill character '{'");
return begin;
}
- specs.fill = {begin, to_unsigned(p - begin)};
+ specs.set_fill(basic_string_view<Char>(begin, to_unsigned(p - begin)));
begin = p + 1;
} else {
++begin;
}
p = begin;
}
- specs.align = align;
+ specs.set_align(alignment);
return begin;
}
-// A floating-point presentation format.
-enum class float_format : unsigned char {
- general, // General: exponent notation or fixed point based on magnitude.
- exp, // Exponent notation with the default precision of 6, e.g. 1.2e-3.
- fixed, // Fixed point with the default precision of 6, e.g. 0.0012.
- hex
-};
-
-struct float_specs {
- int precision;
- float_format format : 8;
- sign_t sign : 8;
- bool upper : 1;
- bool locale : 1;
- bool binary32 : 1;
- bool showpoint : 1;
-};
-
-template <typename Char>
-FMT_CONSTEXPR auto parse_float_type_spec(const format_specs<Char>& specs)
- -> float_specs {
- auto result = float_specs();
- result.showpoint = specs.alt;
- result.locale = specs.localized;
- switch (specs.type) {
- case presentation_type::none:
- result.format = float_format::general;
- break;
- case presentation_type::general_upper:
- result.upper = true;
- FMT_FALLTHROUGH;
- case presentation_type::general_lower:
- result.format = float_format::general;
- break;
- case presentation_type::exp_upper:
- result.upper = true;
- FMT_FALLTHROUGH;
- case presentation_type::exp_lower:
- result.format = float_format::exp;
- result.showpoint |= specs.precision != 0;
- break;
- case presentation_type::fixed_upper:
- result.upper = true;
- FMT_FALLTHROUGH;
- case presentation_type::fixed_lower:
- result.format = float_format::fixed;
- result.showpoint |= specs.precision != 0;
- break;
- case presentation_type::hexfloat_upper:
- result.upper = true;
- FMT_FALLTHROUGH;
- case presentation_type::hexfloat_lower:
- result.format = float_format::hex;
- break;
- default:
- throw_format_error("invalid format specifier");
- break;
- }
- return result;
-}
-
template <typename Char, typename OutputIt>
FMT_CONSTEXPR20 auto write_nonfinite(OutputIt out, bool isnan,
- format_specs<Char> specs,
- const float_specs& fspecs) -> OutputIt {
+ format_specs specs, sign s) -> OutputIt {
auto str =
- isnan ? (fspecs.upper ? "NAN" : "nan") : (fspecs.upper ? "INF" : "inf");
+ isnan ? (specs.upper() ? "NAN" : "nan") : (specs.upper() ? "INF" : "inf");
constexpr size_t str_size = 3;
- auto sign = fspecs.sign;
- auto size = str_size + (sign ? 1 : 0);
+ auto size = str_size + (s != sign::none ? 1 : 0);
// Replace '0'-padding with space for non-finite values.
const bool is_zero_fill =
- specs.fill.size() == 1 && *specs.fill.data() == static_cast<Char>('0');
- if (is_zero_fill) specs.fill[0] = static_cast<Char>(' ');
- return write_padded(out, specs, size, [=](reserve_iterator<OutputIt> it) {
- if (sign) *it++ = detail::sign<Char>(sign);
- return copy_str<Char>(str, str + str_size, it);
- });
+ specs.fill_size() == 1 && specs.fill_unit<Char>() == '0';
+ if (is_zero_fill) specs.set_fill(' ');
+ return write_padded<Char>(out, specs, size,
+ [=](reserve_iterator<OutputIt> it) {
+ if (s != sign::none)
+ *it++ = detail::getsign<Char>(s);
+ return copy<Char>(str, str + str_size, it);
+ });
}
// A decimal floating-point number significand * pow(10, exp).
template <typename Char, typename OutputIt>
constexpr auto write_significand(OutputIt out, const char* significand,
int significand_size) -> OutputIt {
- return copy_str<Char>(significand, significand + significand_size, out);
+ return copy<Char>(significand, significand + significand_size, out);
}
template <typename Char, typename OutputIt, typename UInt>
inline auto write_significand(OutputIt out, UInt significand,
int significand_size) -> OutputIt {
- return format_decimal<Char>(out, significand, significand_size).end;
+ return format_decimal<Char>(out, significand, significand_size);
}
template <typename Char, typename OutputIt, typename T, typename Grouping>
FMT_CONSTEXPR20 auto write_significand(OutputIt out, T significand,
FMT_ENABLE_IF(std::is_integral<UInt>::value)>
inline auto write_significand(Char* out, UInt significand, int significand_size,
int integral_size, Char decimal_point) -> Char* {
- if (!decimal_point)
- return format_decimal(out, significand, significand_size).end;
+ if (!decimal_point) return format_decimal(out, significand, significand_size);
out += significand_size + 1;
Char* end = out;
int floating_size = significand_size - integral_size;
for (int i = floating_size / 2; i > 0; --i) {
out -= 2;
- copy2(out, digits2(static_cast<std::size_t>(significand % 100)));
+ write2digits(out, static_cast<std::size_t>(significand % 100));
significand /= 100;
}
if (floating_size % 2 != 0) {
Char buffer[digits10<UInt>() + 2];
auto end = write_significand(buffer, significand, significand_size,
integral_size, decimal_point);
- return detail::copy_str_noinline<Char>(buffer, end, out);
+ return detail::copy_noinline<Char>(buffer, end, out);
}
template <typename OutputIt, typename Char>
FMT_CONSTEXPR auto write_significand(OutputIt out, const char* significand,
int significand_size, int integral_size,
Char decimal_point) -> OutputIt {
- out = detail::copy_str_noinline<Char>(significand,
- significand + integral_size, out);
+ out = detail::copy_noinline<Char>(significand, significand + integral_size,
+ out);
if (!decimal_point) return out;
*out++ = decimal_point;
- return detail::copy_str_noinline<Char>(significand + integral_size,
- significand + significand_size, out);
+ return detail::copy_noinline<Char>(significand + integral_size,
+ significand + significand_size, out);
}
template <typename OutputIt, typename Char, typename T, typename Grouping>
decimal_point);
}
auto buffer = basic_memory_buffer<Char>();
- write_significand(buffer_appender<Char>(buffer), significand,
- significand_size, integral_size, decimal_point);
+ write_significand(basic_appender<Char>(buffer), significand, significand_size,
+ integral_size, decimal_point);
grouping.apply(
out, basic_string_view<Char>(buffer.data(), to_unsigned(integral_size)));
- return detail::copy_str_noinline<Char>(buffer.data() + integral_size,
- buffer.end(), out);
+ return detail::copy_noinline<Char>(buffer.data() + integral_size,
+ buffer.end(), out);
}
-template <typename OutputIt, typename DecimalFP, typename Char,
+template <typename Char, typename OutputIt, typename DecimalFP,
typename Grouping = digit_grouping<Char>>
FMT_CONSTEXPR20 auto do_write_float(OutputIt out, const DecimalFP& f,
- const format_specs<Char>& specs,
- float_specs fspecs, locale_ref loc)
- -> OutputIt {
+ const format_specs& specs, sign s,
+ int exp_upper, locale_ref loc) -> OutputIt {
auto significand = f.significand;
int significand_size = get_significand_size(f);
const Char zero = static_cast<Char>('0');
- auto sign = fspecs.sign;
- size_t size = to_unsigned(significand_size) + (sign ? 1 : 0);
+ size_t size = to_unsigned(significand_size) + (s != sign::none ? 1 : 0);
using iterator = reserve_iterator<OutputIt>;
- Char decimal_point =
- fspecs.locale ? detail::decimal_point<Char>(loc) : static_cast<Char>('.');
+ Char decimal_point = specs.localized() ? detail::decimal_point<Char>(loc)
+ : static_cast<Char>('.');
int output_exp = f.exponent + significand_size - 1;
auto use_exp_format = [=]() {
- if (fspecs.format == float_format::exp) return true;
- if (fspecs.format != float_format::general) return false;
+ if (specs.type() == presentation_type::exp) return true;
+ if (specs.type() == presentation_type::fixed) return false;
// Use the fixed notation if the exponent is in [exp_lower, exp_upper),
// e.g. 0.0001 instead of 1e-04. Otherwise use the exponent notation.
- const int exp_lower = -4, exp_upper = 16;
+ const int exp_lower = -4;
return output_exp < exp_lower ||
- output_exp >= (fspecs.precision > 0 ? fspecs.precision : exp_upper);
+ output_exp >= (specs.precision > 0 ? specs.precision : exp_upper);
};
if (use_exp_format()) {
int num_zeros = 0;
- if (fspecs.showpoint) {
- num_zeros = fspecs.precision - significand_size;
+ if (specs.alt()) {
+ num_zeros = specs.precision - significand_size;
if (num_zeros < 0) num_zeros = 0;
size += to_unsigned(num_zeros);
} else if (significand_size == 1) {
if (abs_output_exp >= 100) exp_digits = abs_output_exp >= 1000 ? 4 : 3;
size += to_unsigned((decimal_point ? 1 : 0) + 2 + exp_digits);
- char exp_char = fspecs.upper ? 'E' : 'e';
+ char exp_char = specs.upper() ? 'E' : 'e';
auto write = [=](iterator it) {
- if (sign) *it++ = detail::sign<Char>(sign);
+ if (s != sign::none) *it++ = detail::getsign<Char>(s);
// Insert a decimal point after the first digit and add an exponent.
it = write_significand(it, significand, significand_size, 1,
decimal_point);
*it++ = static_cast<Char>(exp_char);
return write_exponent<Char>(output_exp, it);
};
- return specs.width > 0 ? write_padded<align::right>(out, specs, size, write)
- : base_iterator(out, write(reserve(out, size)));
+ return specs.width > 0
+ ? write_padded<Char, align::right>(out, specs, size, write)
+ : base_iterator(out, write(reserve(out, size)));
}
int exp = f.exponent + significand_size;
if (f.exponent >= 0) {
// 1234e5 -> 123400000[.0+]
size += to_unsigned(f.exponent);
- int num_zeros = fspecs.precision - exp;
+ int num_zeros = specs.precision - exp;
abort_fuzzing_if(num_zeros > 5000);
- if (fspecs.showpoint) {
+ if (specs.alt()) {
++size;
- if (num_zeros <= 0 && fspecs.format != float_format::fixed) num_zeros = 0;
+ if (num_zeros <= 0 && specs.type() != presentation_type::fixed)
+ num_zeros = 0;
if (num_zeros > 0) size += to_unsigned(num_zeros);
}
- auto grouping = Grouping(loc, fspecs.locale);
+ auto grouping = Grouping(loc, specs.localized());
size += to_unsigned(grouping.count_separators(exp));
- return write_padded<align::right>(out, specs, size, [&](iterator it) {
- if (sign) *it++ = detail::sign<Char>(sign);
+ return write_padded<Char, align::right>(out, specs, size, [&](iterator it) {
+ if (s != sign::none) *it++ = detail::getsign<Char>(s);
it = write_significand<Char>(it, significand, significand_size,
f.exponent, grouping);
- if (!fspecs.showpoint) return it;
+ if (!specs.alt()) return it;
*it++ = decimal_point;
return num_zeros > 0 ? detail::fill_n(it, num_zeros, zero) : it;
});
} else if (exp > 0) {
// 1234e-2 -> 12.34[0+]
- int num_zeros = fspecs.showpoint ? fspecs.precision - significand_size : 0;
- size += 1 + to_unsigned(num_zeros > 0 ? num_zeros : 0);
- auto grouping = Grouping(loc, fspecs.locale);
+ int num_zeros = specs.alt() ? specs.precision - significand_size : 0;
+ size += 1 + static_cast<unsigned>(max_of(num_zeros, 0));
+ auto grouping = Grouping(loc, specs.localized());
size += to_unsigned(grouping.count_separators(exp));
- return write_padded<align::right>(out, specs, size, [&](iterator it) {
- if (sign) *it++ = detail::sign<Char>(sign);
+ return write_padded<Char, align::right>(out, specs, size, [&](iterator it) {
+ if (s != sign::none) *it++ = detail::getsign<Char>(s);
it = write_significand(it, significand, significand_size, exp,
decimal_point, grouping);
return num_zeros > 0 ? detail::fill_n(it, num_zeros, zero) : it;
}
// 1234e-6 -> 0.001234
int num_zeros = -exp;
- if (significand_size == 0 && fspecs.precision >= 0 &&
- fspecs.precision < num_zeros) {
- num_zeros = fspecs.precision;
+ if (significand_size == 0 && specs.precision >= 0 &&
+ specs.precision < num_zeros) {
+ num_zeros = specs.precision;
}
- bool pointy = num_zeros != 0 || significand_size != 0 || fspecs.showpoint;
+ bool pointy = num_zeros != 0 || significand_size != 0 || specs.alt();
size += 1 + (pointy ? 1 : 0) + to_unsigned(num_zeros);
- return write_padded<align::right>(out, specs, size, [&](iterator it) {
- if (sign) *it++ = detail::sign<Char>(sign);
+ return write_padded<Char, align::right>(out, specs, size, [&](iterator it) {
+ if (s != sign::none) *it++ = detail::getsign<Char>(s);
*it++ = zero;
if (!pointy) return it;
*it++ = decimal_point;
}
};
-template <typename OutputIt, typename DecimalFP, typename Char>
+template <typename Char, typename OutputIt, typename DecimalFP>
FMT_CONSTEXPR20 auto write_float(OutputIt out, const DecimalFP& f,
- const format_specs<Char>& specs,
- float_specs fspecs, locale_ref loc)
- -> OutputIt {
+ const format_specs& specs, sign s,
+ int exp_upper, locale_ref loc) -> OutputIt {
if (is_constant_evaluated()) {
- return do_write_float<OutputIt, DecimalFP, Char,
- fallback_digit_grouping<Char>>(out, f, specs, fspecs,
- loc);
+ return do_write_float<Char, OutputIt, DecimalFP,
+ fallback_digit_grouping<Char>>(out, f, specs, s,
+ exp_upper, loc);
} else {
- return do_write_float(out, f, specs, fspecs, loc);
+ return do_write_float<Char>(out, f, specs, s, exp_upper, loc);
}
}
template <typename T> constexpr auto isnan(T value) -> bool {
- return !(value >= value); // std::isnan doesn't support __float128.
+ return value != value; // std::isnan doesn't support __float128.
}
template <typename T, typename Enable = void>
class bigint {
private:
- // A bigint is stored as an array of bigits (big digits), with bigit at index
- // 0 being the least significant one.
- using bigit = uint32_t;
+ // A bigint is a number in the form bigit_[N - 1] ... bigit_[0] * 32^exp_.
+ using bigit = uint32_t; // A big digit.
using double_bigit = uint64_t;
+ enum { bigit_bits = num_bits<bigit>() };
enum { bigits_capacity = 32 };
basic_memory_buffer<bigit, bigits_capacity> bigits_;
int exp_;
- FMT_CONSTEXPR20 auto operator[](int index) const -> bigit {
- return bigits_[to_unsigned(index)];
- }
- FMT_CONSTEXPR20 auto operator[](int index) -> bigit& {
- return bigits_[to_unsigned(index)];
- }
-
- static constexpr const int bigit_bits = num_bits<bigit>();
-
friend struct formatter<bigint>;
- FMT_CONSTEXPR20 void subtract_bigits(int index, bigit other, bigit& borrow) {
- auto result = static_cast<double_bigit>((*this)[index]) - other - borrow;
- (*this)[index] = static_cast<bigit>(result);
+ FMT_CONSTEXPR auto get_bigit(int i) const -> bigit {
+ return i >= exp_ && i < num_bigits() ? bigits_[i - exp_] : 0;
+ }
+
+ FMT_CONSTEXPR void subtract_bigits(int index, bigit other, bigit& borrow) {
+ auto result = double_bigit(bigits_[index]) - other - borrow;
+ bigits_[index] = static_cast<bigit>(result);
borrow = static_cast<bigit>(result >> (bigit_bits * 2 - 1));
}
- FMT_CONSTEXPR20 void remove_leading_zeros() {
+ FMT_CONSTEXPR void remove_leading_zeros() {
int num_bigits = static_cast<int>(bigits_.size()) - 1;
- while (num_bigits > 0 && (*this)[num_bigits] == 0) --num_bigits;
+ while (num_bigits > 0 && bigits_[num_bigits] == 0) --num_bigits;
bigits_.resize(to_unsigned(num_bigits + 1));
}
// Computes *this -= other assuming aligned bigints and *this >= other.
- FMT_CONSTEXPR20 void subtract_aligned(const bigint& other) {
+ FMT_CONSTEXPR void subtract_aligned(const bigint& other) {
FMT_ASSERT(other.exp_ >= exp_, "unaligned bigints");
FMT_ASSERT(compare(*this, other) >= 0, "");
bigit borrow = 0;
int i = other.exp_ - exp_;
for (size_t j = 0, n = other.bigits_.size(); j != n; ++i, ++j)
subtract_bigits(i, other.bigits_[j], borrow);
- while (borrow > 0) subtract_bigits(i, 0, borrow);
+ if (borrow != 0) subtract_bigits(i, 0, borrow);
+ FMT_ASSERT(borrow == 0, "");
remove_leading_zeros();
}
- FMT_CONSTEXPR20 void multiply(uint32_t value) {
- const double_bigit wide_value = value;
+ FMT_CONSTEXPR void multiply(uint32_t value) {
bigit carry = 0;
+ const double_bigit wide_value = value;
for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
double_bigit result = bigits_[i] * wide_value + carry;
bigits_[i] = static_cast<bigit>(result);
template <typename UInt, FMT_ENABLE_IF(std::is_same<UInt, uint64_t>::value ||
std::is_same<UInt, uint128_t>::value)>
- FMT_CONSTEXPR20 void multiply(UInt value) {
+ FMT_CONSTEXPR void multiply(UInt value) {
using half_uint =
conditional_t<std::is_same<UInt, uint128_t>::value, uint64_t, uint32_t>;
const int shift = num_bits<half_uint>() - bigit_bits;
template <typename UInt, FMT_ENABLE_IF(std::is_same<UInt, uint64_t>::value ||
std::is_same<UInt, uint128_t>::value)>
- FMT_CONSTEXPR20 void assign(UInt n) {
+ FMT_CONSTEXPR void assign(UInt n) {
size_t num_bigits = 0;
do {
bigits_[num_bigits++] = static_cast<bigit>(n);
}
public:
- FMT_CONSTEXPR20 bigint() : exp_(0) {}
+ FMT_CONSTEXPR bigint() : exp_(0) {}
explicit bigint(uint64_t n) { assign(n); }
bigint(const bigint&) = delete;
void operator=(const bigint&) = delete;
- FMT_CONSTEXPR20 void assign(const bigint& other) {
+ FMT_CONSTEXPR void assign(const bigint& other) {
auto size = other.bigits_.size();
bigits_.resize(size);
auto data = other.bigits_.data();
- copy_str<bigit>(data, data + size, bigits_.data());
+ copy<bigit>(data, data + size, bigits_.data());
exp_ = other.exp_;
}
- template <typename Int> FMT_CONSTEXPR20 void operator=(Int n) {
+ template <typename Int> FMT_CONSTEXPR void operator=(Int n) {
FMT_ASSERT(n > 0, "");
assign(uint64_or_128_t<Int>(n));
}
- FMT_CONSTEXPR20 auto num_bigits() const -> int {
+ FMT_CONSTEXPR auto num_bigits() const -> int {
return static_cast<int>(bigits_.size()) + exp_;
}
- FMT_NOINLINE FMT_CONSTEXPR20 auto operator<<=(int shift) -> bigint& {
+ FMT_CONSTEXPR auto operator<<=(int shift) -> bigint& {
FMT_ASSERT(shift >= 0, "");
exp_ += shift / bigit_bits;
shift %= bigit_bits;
return *this;
}
- template <typename Int>
- FMT_CONSTEXPR20 auto operator*=(Int value) -> bigint& {
+ template <typename Int> FMT_CONSTEXPR auto operator*=(Int value) -> bigint& {
FMT_ASSERT(value > 0, "");
multiply(uint32_or_64_or_128_t<Int>(value));
return *this;
}
- friend FMT_CONSTEXPR20 auto compare(const bigint& lhs, const bigint& rhs)
- -> int {
- int num_lhs_bigits = lhs.num_bigits(), num_rhs_bigits = rhs.num_bigits();
- if (num_lhs_bigits != num_rhs_bigits)
- return num_lhs_bigits > num_rhs_bigits ? 1 : -1;
- int i = static_cast<int>(lhs.bigits_.size()) - 1;
- int j = static_cast<int>(rhs.bigits_.size()) - 1;
+ friend FMT_CONSTEXPR auto compare(const bigint& b1, const bigint& b2) -> int {
+ int num_bigits1 = b1.num_bigits(), num_bigits2 = b2.num_bigits();
+ if (num_bigits1 != num_bigits2) return num_bigits1 > num_bigits2 ? 1 : -1;
+ int i = static_cast<int>(b1.bigits_.size()) - 1;
+ int j = static_cast<int>(b2.bigits_.size()) - 1;
int end = i - j;
if (end < 0) end = 0;
for (; i >= end; --i, --j) {
- bigit lhs_bigit = lhs[i], rhs_bigit = rhs[j];
- if (lhs_bigit != rhs_bigit) return lhs_bigit > rhs_bigit ? 1 : -1;
+ bigit b1_bigit = b1.bigits_[i], b2_bigit = b2.bigits_[j];
+ if (b1_bigit != b2_bigit) return b1_bigit > b2_bigit ? 1 : -1;
}
if (i != j) return i > j ? 1 : -1;
return 0;
}
// Returns compare(lhs1 + lhs2, rhs).
- friend FMT_CONSTEXPR20 auto add_compare(const bigint& lhs1,
- const bigint& lhs2, const bigint& rhs)
- -> int {
- auto minimum = [](int a, int b) { return a < b ? a : b; };
- auto maximum = [](int a, int b) { return a > b ? a : b; };
- int max_lhs_bigits = maximum(lhs1.num_bigits(), lhs2.num_bigits());
+ friend FMT_CONSTEXPR auto add_compare(const bigint& lhs1, const bigint& lhs2,
+ const bigint& rhs) -> int {
+ int max_lhs_bigits = max_of(lhs1.num_bigits(), lhs2.num_bigits());
int num_rhs_bigits = rhs.num_bigits();
if (max_lhs_bigits + 1 < num_rhs_bigits) return -1;
if (max_lhs_bigits > num_rhs_bigits) return 1;
- auto get_bigit = [](const bigint& n, int i) -> bigit {
- return i >= n.exp_ && i < n.num_bigits() ? n[i - n.exp_] : 0;
- };
double_bigit borrow = 0;
- int min_exp = minimum(minimum(lhs1.exp_, lhs2.exp_), rhs.exp_);
+ int min_exp = min_of(min_of(lhs1.exp_, lhs2.exp_), rhs.exp_);
for (int i = num_rhs_bigits - 1; i >= min_exp; --i) {
- double_bigit sum =
- static_cast<double_bigit>(get_bigit(lhs1, i)) + get_bigit(lhs2, i);
- bigit rhs_bigit = get_bigit(rhs, i);
+ double_bigit sum = double_bigit(lhs1.get_bigit(i)) + lhs2.get_bigit(i);
+ bigit rhs_bigit = rhs.get_bigit(i);
if (sum > rhs_bigit + borrow) return 1;
borrow = rhs_bigit + borrow - sum;
if (borrow > 1) return -1;
FMT_CONSTEXPR20 void assign_pow10(int exp) {
FMT_ASSERT(exp >= 0, "");
if (exp == 0) return *this = 1;
- // Find the top bit.
- int bitmask = 1;
- while (exp >= bitmask) bitmask <<= 1;
- bitmask >>= 1;
+ int bitmask = 1 << (num_bits<unsigned>() -
+ countl_zero(static_cast<uint32_t>(exp)) - 1);
// pow(10, exp) = pow(5, exp) * pow(2, exp). First compute pow(5, exp) by
// repeated squaring and multiplication.
*this = 5;
// cross-product terms n[i] * n[j] such that i + j == bigit_index.
for (int i = 0, j = bigit_index; j >= 0; ++i, --j) {
// Most terms are multiplied twice which can be optimized in the future.
- sum += static_cast<double_bigit>(n[i]) * n[j];
+ sum += double_bigit(n[i]) * n[j];
}
- (*this)[bigit_index] = static_cast<bigit>(sum);
+ bigits_[bigit_index] = static_cast<bigit>(sum);
sum >>= num_bits<bigit>(); // Compute the carry.
}
// Do the same for the top half.
for (int bigit_index = num_bigits; bigit_index < num_result_bigits;
++bigit_index) {
for (int j = num_bigits - 1, i = bigit_index - j; i < num_bigits;)
- sum += static_cast<double_bigit>(n[i++]) * n[j--];
- (*this)[bigit_index] = static_cast<bigit>(sum);
+ sum += double_bigit(n[i++]) * n[j--];
+ bigits_[bigit_index] = static_cast<bigit>(sum);
sum >>= num_bits<bigit>();
}
remove_leading_zeros();
// If this bigint has a bigger exponent than other, adds trailing zero to make
// exponents equal. This simplifies some operations such as subtraction.
- FMT_CONSTEXPR20 void align(const bigint& other) {
+ FMT_CONSTEXPR void align(const bigint& other) {
int exp_difference = exp_ - other.exp_;
if (exp_difference <= 0) return;
int num_bigits = static_cast<int>(bigits_.size());
bigits_.resize(to_unsigned(num_bigits + exp_difference));
for (int i = num_bigits - 1, j = i + exp_difference; i >= 0; --i, --j)
bigits_[j] = bigits_[i];
- std::uninitialized_fill_n(bigits_.data(), exp_difference, 0u);
+ memset(bigits_.data(), 0, to_unsigned(exp_difference) * sizeof(bigit));
exp_ -= exp_difference;
}
// Divides this bignum by divisor, assigning the remainder to this and
// returning the quotient.
- FMT_CONSTEXPR20 auto divmod_assign(const bigint& divisor) -> int {
+ FMT_CONSTEXPR auto divmod_assign(const bigint& divisor) -> int {
FMT_ASSERT(this != &divisor, "");
if (compare(*this, divisor) < 0) return 0;
FMT_ASSERT(divisor.bigits_[divisor.bigits_.size() - 1u] != 0, "");
// Generate the given number of digits.
exp10 -= num_digits - 1;
if (num_digits <= 0) {
- denominator *= 10;
- auto digit = add_compare(numerator, numerator, denominator) > 0 ? '1' : '0';
+ auto digit = '0';
+ if (num_digits == 0) {
+ denominator *= 10;
+ digit = add_compare(numerator, numerator, denominator) > 0 ? '1' : '0';
+ }
buf.push_back(digit);
return;
}
// Formats a floating-point number using the hexfloat format.
template <typename Float, FMT_ENABLE_IF(!is_double_double<Float>::value)>
-FMT_CONSTEXPR20 void format_hexfloat(Float value, int precision,
- float_specs specs, buffer<char>& buf) {
+FMT_CONSTEXPR20 void format_hexfloat(Float value, format_specs specs,
+ buffer<char>& buf) {
// float is passed as double to reduce the number of instantiations and to
// simplify implementation.
static_assert(!std::is_same<Float, float>::value, "");
// Assume Float is in the format [sign][exponent][significand].
using carrier_uint = typename info::carrier_uint;
- constexpr auto num_float_significand_bits =
- detail::num_significand_bits<Float>();
+ const auto num_float_significand_bits = detail::num_significand_bits<Float>();
basic_fp<carrier_uint> f(value);
f.e += num_float_significand_bits;
if (!has_implicit_bit<Float>()) --f.e;
- constexpr auto num_fraction_bits =
+ const auto num_fraction_bits =
num_float_significand_bits + (has_implicit_bit<Float>() ? 1 : 0);
- constexpr auto num_xdigits = (num_fraction_bits + 3) / 4;
+ const auto num_xdigits = (num_fraction_bits + 3) / 4;
- constexpr auto leading_shift = ((num_xdigits - 1) * 4);
+ const auto leading_shift = ((num_xdigits - 1) * 4);
const auto leading_mask = carrier_uint(0xF) << leading_shift;
const auto leading_xdigit =
static_cast<uint32_t>((f.f & leading_mask) >> leading_shift);
if (leading_xdigit > 1) f.e -= (32 - countl_zero(leading_xdigit) - 1);
int print_xdigits = num_xdigits - 1;
- if (precision >= 0 && print_xdigits > precision) {
- const int shift = ((print_xdigits - precision - 1) * 4);
+ if (specs.precision >= 0 && print_xdigits > specs.precision) {
+ const int shift = ((print_xdigits - specs.precision - 1) * 4);
const auto mask = carrier_uint(0xF) << shift;
const auto v = static_cast<uint32_t>((f.f & mask) >> shift);
}
}
- print_xdigits = precision;
+ print_xdigits = specs.precision;
}
char xdigits[num_bits<carrier_uint>() / 4];
detail::fill_n(xdigits, sizeof(xdigits), '0');
- format_uint<4>(xdigits, f.f, num_xdigits, specs.upper);
+ format_base2e(4, xdigits, f.f, num_xdigits, specs.upper());
// Remove zero tail
while (print_xdigits > 0 && xdigits[print_xdigits] == '0') --print_xdigits;
buf.push_back('0');
- buf.push_back(specs.upper ? 'X' : 'x');
+ buf.push_back(specs.upper() ? 'X' : 'x');
buf.push_back(xdigits[0]);
- if (specs.showpoint || print_xdigits > 0 || print_xdigits < precision)
+ if (specs.alt() || print_xdigits > 0 || print_xdigits < specs.precision)
buf.push_back('.');
buf.append(xdigits + 1, xdigits + 1 + print_xdigits);
- for (; print_xdigits < precision; ++print_xdigits) buf.push_back('0');
+ for (; print_xdigits < specs.precision; ++print_xdigits) buf.push_back('0');
- buf.push_back(specs.upper ? 'P' : 'p');
+ buf.push_back(specs.upper() ? 'P' : 'p');
uint32_t abs_e;
if (f.e < 0) {
}
template <typename Float, FMT_ENABLE_IF(is_double_double<Float>::value)>
-FMT_CONSTEXPR20 void format_hexfloat(Float value, int precision,
- float_specs specs, buffer<char>& buf) {
- format_hexfloat(static_cast<double>(value), precision, specs, buf);
+FMT_CONSTEXPR20 void format_hexfloat(Float value, format_specs specs,
+ buffer<char>& buf) {
+ format_hexfloat(static_cast<double>(value), specs, buf);
}
constexpr auto fractional_part_rounding_thresholds(int index) -> uint32_t {
}
template <typename Float>
-FMT_CONSTEXPR20 auto format_float(Float value, int precision, float_specs specs,
+FMT_CONSTEXPR20 auto format_float(Float value, int precision,
+ const format_specs& specs, bool binary32,
buffer<char>& buf) -> int {
// float is passed as double to reduce the number of instantiations.
static_assert(!std::is_same<Float, float>::value, "");
- FMT_ASSERT(value >= 0, "value is negative");
auto converted_value = convert_float(value);
- const bool fixed = specs.format == float_format::fixed;
- if (value <= 0) { // <= instead of == to silence a warning.
+ const bool fixed = specs.type() == presentation_type::fixed;
+ if (value == 0) {
if (precision <= 0 || !fixed) {
buf.push_back('0');
return 0;
exp = static_cast<int>(e);
if (e > exp) ++exp; // Compute ceil.
dragon_flags = dragon::fixup;
- } else if (precision < 0) {
- // Use Dragonbox for the shortest format.
- if (specs.binary32) {
- auto dec = dragonbox::to_decimal(static_cast<float>(value));
- write<char>(buffer_appender<char>(buf), dec.significand);
- return dec.exponent;
- }
- auto dec = dragonbox::to_decimal(static_cast<double>(value));
- write<char>(buffer_appender<char>(buf), dec.significand);
- return dec.exponent;
} else {
// Extract significand bits and exponent bits.
using info = dragonbox::float_info<double>;
uint64_t prod;
uint32_t digits;
bool should_round_up;
- int number_of_digits_to_print = precision > 9 ? 9 : precision;
+ int number_of_digits_to_print = min_of(precision, 9);
// Print a 9-digits subsegment, either the first or the second.
auto print_subsegment = [&](uint32_t subsegment, char* buffer) {
// for details.
prod = ((subsegment * static_cast<uint64_t>(450359963)) >> 20) + 1;
digits = static_cast<uint32_t>(prod >> 32);
- copy2(buffer, digits2(digits));
+ write2digits(buffer, digits);
number_of_digits_printed += 2;
}
while (number_of_digits_printed < number_of_digits_to_print) {
prod = static_cast<uint32_t>(prod) * static_cast<uint64_t>(100);
digits = static_cast<uint32_t>(prod >> 32);
- copy2(buffer + number_of_digits_printed, digits2(digits));
+ write2digits(buffer + number_of_digits_printed, digits);
number_of_digits_printed += 2;
}
};
}
if (use_dragon) {
auto f = basic_fp<uint128_t>();
- bool is_predecessor_closer = specs.binary32
- ? f.assign(static_cast<float>(value))
- : f.assign(converted_value);
+ bool is_predecessor_closer = binary32 ? f.assign(static_cast<float>(value))
+ : f.assign(converted_value);
if (is_predecessor_closer) dragon_flags |= dragon::predecessor_closer;
if (fixed) dragon_flags |= dragon::fixed;
// Limit precision to the maximum possible number of significant digits in
if (precision > max_double_digits) precision = max_double_digits;
format_dragon(f, dragon_flags, precision, buf, exp);
}
- if (!fixed && !specs.showpoint) {
+ if (!fixed && !specs.alt()) {
// Remove trailing zeros.
auto num_digits = buf.size();
while (num_digits > 0 && buf[num_digits - 1] == '0') {
}
return exp;
}
+
+// Numbers with exponents greater or equal to the returned value will use
+// the exponential notation.
+template <typename T> constexpr auto exp_upper() -> int {
+ return std::numeric_limits<T>::digits10 != 0
+ ? min_of(16, std::numeric_limits<T>::digits10 + 1)
+ : 16;
+}
+
template <typename Char, typename OutputIt, typename T>
-FMT_CONSTEXPR20 auto write_float(OutputIt out, T value,
- format_specs<Char> specs, locale_ref loc)
- -> OutputIt {
- float_specs fspecs = parse_float_type_spec(specs);
- fspecs.sign = specs.sign;
- if (detail::signbit(value)) { // value < 0 is false for NaN so use signbit.
- fspecs.sign = sign::minus;
- value = -value;
- } else if (fspecs.sign == sign::minus) {
- fspecs.sign = sign::none;
- }
+FMT_CONSTEXPR20 auto write_float(OutputIt out, T value, format_specs specs,
+ locale_ref loc) -> OutputIt {
+ // Use signbit because value < 0 is false for NaN.
+ sign s = detail::signbit(value) ? sign::minus : specs.sign();
if (!detail::isfinite(value))
- return write_nonfinite(out, detail::isnan(value), specs, fspecs);
+ return write_nonfinite<Char>(out, detail::isnan(value), specs, s);
- if (specs.align == align::numeric && fspecs.sign) {
- auto it = reserve(out, 1);
- *it++ = detail::sign<Char>(fspecs.sign);
- out = base_iterator(out, it);
- fspecs.sign = sign::none;
+ if (specs.align() == align::numeric && s != sign::none) {
+ *out++ = detail::getsign<Char>(s);
+ s = sign::none;
if (specs.width != 0) --specs.width;
}
+ constexpr int exp_upper = detail::exp_upper<T>();
+ int precision = specs.precision;
+ if (precision < 0) {
+ if (specs.type() != presentation_type::none) {
+ precision = 6;
+ } else if (is_fast_float<T>::value && !is_constant_evaluated()) {
+ // Use Dragonbox for the shortest format.
+ using floaty = conditional_t<sizeof(T) >= sizeof(double), double, float>;
+ auto dec = dragonbox::to_decimal(static_cast<floaty>(value));
+ return write_float<Char>(out, dec, specs, s, exp_upper, loc);
+ }
+ }
+
memory_buffer buffer;
- if (fspecs.format == float_format::hex) {
- if (fspecs.sign) buffer.push_back(detail::sign<char>(fspecs.sign));
- format_hexfloat(convert_float(value), specs.precision, fspecs, buffer);
- return write_bytes<align::right>(out, {buffer.data(), buffer.size()},
- specs);
- }
- int precision = specs.precision >= 0 || specs.type == presentation_type::none
- ? specs.precision
- : 6;
- if (fspecs.format == float_format::exp) {
+ if (specs.type() == presentation_type::hexfloat) {
+ if (s != sign::none) buffer.push_back(detail::getsign<char>(s));
+ format_hexfloat(convert_float(value), specs, buffer);
+ return write_bytes<Char, align::right>(out, {buffer.data(), buffer.size()},
+ specs);
+ }
+
+ if (specs.type() == presentation_type::exp) {
if (precision == max_value<int>())
- throw_format_error("number is too big");
+ report_error("number is too big");
else
++precision;
- } else if (fspecs.format != float_format::fixed && precision == 0) {
+ if (specs.precision != 0) specs.set_alt();
+ } else if (specs.type() == presentation_type::fixed) {
+ if (specs.precision != 0) specs.set_alt();
+ } else if (precision == 0) {
precision = 1;
}
- if (const_check(std::is_same<T, float>())) fspecs.binary32 = true;
- int exp = format_float(convert_float(value), precision, fspecs, buffer);
- fspecs.precision = precision;
+ int exp = format_float(convert_float(value), precision, specs,
+ std::is_same<T, float>(), buffer);
+
+ specs.precision = precision;
auto f = big_decimal_fp{buffer.data(), static_cast<int>(buffer.size()), exp};
- return write_float(out, f, specs, fspecs, loc);
+ return write_float<Char>(out, f, specs, s, exp_upper, loc);
}
template <typename Char, typename OutputIt, typename T,
FMT_ENABLE_IF(is_floating_point<T>::value)>
-FMT_CONSTEXPR20 auto write(OutputIt out, T value, format_specs<Char> specs,
+FMT_CONSTEXPR20 auto write(OutputIt out, T value, format_specs specs,
locale_ref loc = {}) -> OutputIt {
- if (const_check(!is_supported_floating_point(value))) return out;
- return specs.localized && write_loc(out, value, specs, loc)
+ return specs.localized() && write_loc(out, value, specs, loc)
? out
- : write_float(out, value, specs, loc);
+ : write_float<Char>(out, value, specs, loc);
}
template <typename Char, typename OutputIt, typename T,
FMT_ENABLE_IF(is_fast_float<T>::value)>
FMT_CONSTEXPR20 auto write(OutputIt out, T value) -> OutputIt {
- if (is_constant_evaluated()) return write(out, value, format_specs<Char>());
- if (const_check(!is_supported_floating_point(value))) return out;
+ if (is_constant_evaluated()) return write<Char>(out, value, format_specs());
- auto fspecs = float_specs();
- if (detail::signbit(value)) {
- fspecs.sign = sign::minus;
- value = -value;
- }
+ auto s = detail::signbit(value) ? sign::minus : sign::none;
- constexpr auto specs = format_specs<Char>();
- using floaty = conditional_t<std::is_same<T, long double>::value, double, T>;
+ constexpr auto specs = format_specs();
+ using floaty = conditional_t<sizeof(T) >= sizeof(double), double, float>;
using floaty_uint = typename dragonbox::float_info<floaty>::carrier_uint;
floaty_uint mask = exponent_mask<floaty>();
if ((bit_cast<floaty_uint>(value) & mask) == mask)
- return write_nonfinite(out, std::isnan(value), specs, fspecs);
+ return write_nonfinite<Char>(out, std::isnan(value), specs, s);
auto dec = dragonbox::to_decimal(static_cast<floaty>(value));
- return write_float(out, dec, specs, fspecs, {});
+ return write_float<Char>(out, dec, specs, s, exp_upper<T>(), {});
}
template <typename Char, typename OutputIt, typename T,
FMT_ENABLE_IF(is_floating_point<T>::value &&
!is_fast_float<T>::value)>
inline auto write(OutputIt out, T value) -> OutputIt {
- return write(out, value, format_specs<Char>());
+ return write<Char>(out, value, format_specs());
}
template <typename Char, typename OutputIt>
-auto write(OutputIt out, monostate, format_specs<Char> = {}, locale_ref = {})
+auto write(OutputIt out, monostate, format_specs = {}, locale_ref = {})
-> OutputIt {
FMT_ASSERT(false, "");
return out;
template <typename Char, typename OutputIt>
FMT_CONSTEXPR auto write(OutputIt out, basic_string_view<Char> value)
-> OutputIt {
- auto it = reserve(out, value.size());
- it = copy_str_noinline<Char>(value.begin(), value.end(), it);
- return base_iterator(out, it);
+ return copy_noinline<Char>(value.begin(), value.end(), out);
}
template <typename Char, typename OutputIt, typename T,
- FMT_ENABLE_IF(is_string<T>::value)>
+ FMT_ENABLE_IF(has_to_string_view<T>::value)>
constexpr auto write(OutputIt out, const T& value) -> OutputIt {
return write<Char>(out, to_string_view(value));
}
// FMT_ENABLE_IF() condition separated to workaround an MSVC bug.
template <
typename Char, typename OutputIt, typename T,
- bool check =
- std::is_enum<T>::value && !std::is_same<T, Char>::value &&
- mapped_type_constant<T, basic_format_context<OutputIt, Char>>::value !=
- type::custom_type,
+ bool check = std::is_enum<T>::value && !std::is_same<T, Char>::value &&
+ mapped_type_constant<T, Char>::value != type::custom_type,
FMT_ENABLE_IF(check)>
FMT_CONSTEXPR auto write(OutputIt out, T value) -> OutputIt {
return write<Char>(out, static_cast<underlying_t<T>>(value));
template <typename Char, typename OutputIt, typename T,
FMT_ENABLE_IF(std::is_same<T, bool>::value)>
-FMT_CONSTEXPR auto write(OutputIt out, T value,
- const format_specs<Char>& specs = {}, locale_ref = {})
- -> OutputIt {
- return specs.type != presentation_type::none &&
- specs.type != presentation_type::string
- ? write(out, value ? 1 : 0, specs, {})
- : write_bytes(out, value ? "true" : "false", specs);
+FMT_CONSTEXPR auto write(OutputIt out, T value, const format_specs& specs = {},
+ locale_ref = {}) -> OutputIt {
+ return specs.type() != presentation_type::none &&
+ specs.type() != presentation_type::string
+ ? write<Char>(out, value ? 1 : 0, specs, {})
+ : write_bytes<Char>(out, value ? "true" : "false", specs);
}
template <typename Char, typename OutputIt>
}
template <typename Char, typename OutputIt>
-FMT_CONSTEXPR_CHAR_TRAITS auto write(OutputIt out, const Char* value)
- -> OutputIt {
+FMT_CONSTEXPR20 auto write(OutputIt out, const Char* value) -> OutputIt {
if (value) return write(out, basic_string_view<Char>(value));
- throw_format_error("string pointer is null");
+ report_error("string pointer is null");
return out;
}
template <typename Char, typename OutputIt, typename T,
FMT_ENABLE_IF(std::is_same<T, void>::value)>
-auto write(OutputIt out, const T* value, const format_specs<Char>& specs = {},
+auto write(OutputIt out, const T* value, const format_specs& specs = {},
locale_ref = {}) -> OutputIt {
return write_ptr<Char>(out, bit_cast<uintptr_t>(value), &specs);
}
-// A write overload that handles implicit conversions.
template <typename Char, typename OutputIt, typename T,
- typename Context = basic_format_context<OutputIt, Char>>
-FMT_CONSTEXPR auto write(OutputIt out, const T& value) -> enable_if_t<
- std::is_class<T>::value && !is_string<T>::value &&
- !is_floating_point<T>::value && !std::is_same<T, Char>::value &&
- !std::is_same<T, remove_cvref_t<decltype(arg_mapper<Context>().map(
- value))>>::value,
- OutputIt> {
- return write<Char>(out, arg_mapper<Context>().map(value));
+ FMT_ENABLE_IF(mapped_type_constant<T, Char>::value ==
+ type::custom_type &&
+ !std::is_fundamental<T>::value)>
+FMT_CONSTEXPR auto write(OutputIt out, const T& value) -> OutputIt {
+ auto f = formatter<T, Char>();
+ auto parse_ctx = parse_context<Char>({});
+ f.parse(parse_ctx);
+ auto ctx = basic_format_context<OutputIt, Char>(out, {}, {});
+ return f.format(value, ctx);
}
-template <typename Char, typename OutputIt, typename T,
- typename Context = basic_format_context<OutputIt, Char>>
-FMT_CONSTEXPR auto write(OutputIt out, const T& value)
- -> enable_if_t<mapped_type_constant<T, Context>::value == type::custom_type,
- OutputIt> {
- auto formatter = typename Context::template formatter_type<T>();
- auto parse_ctx = typename Context::parse_context_type({});
- formatter.parse(parse_ctx);
- auto ctx = Context(out, {}, {});
- return formatter.format(value, ctx);
-}
+template <typename T>
+using is_builtin =
+ bool_constant<std::is_same<T, int>::value || FMT_BUILTIN_TYPES>;
// An argument visitor that formats the argument and writes it via the output
// iterator. It's a class and not a generic lambda for compatibility with C++11.
template <typename Char> struct default_arg_formatter {
- using iterator = buffer_appender<Char>;
- using context = buffer_context<Char>;
+ using context = buffered_context<Char>;
- iterator out;
- basic_format_args<context> args;
- locale_ref loc;
+ basic_appender<Char> out;
- template <typename T> auto operator()(T value) -> iterator {
- return write<Char>(out, value);
+ void operator()(monostate) { report_error("argument not found"); }
+
+ template <typename T, FMT_ENABLE_IF(is_builtin<T>::value)>
+ void operator()(T value) {
+ write<Char>(out, value);
+ }
+
+ template <typename T, FMT_ENABLE_IF(!is_builtin<T>::value)>
+ void operator()(T) {
+ FMT_ASSERT(false, "");
}
- auto operator()(typename basic_format_arg<context>::handle h) -> iterator {
- basic_format_parse_context<Char> parse_ctx({});
- context format_ctx(out, args, loc);
+
+ void operator()(typename basic_format_arg<context>::handle h) {
+ // Use a null locale since the default format must be unlocalized.
+ auto parse_ctx = parse_context<Char>({});
+ auto format_ctx = context(out, {}, {});
h.format(parse_ctx, format_ctx);
- return format_ctx.out();
}
};
template <typename Char> struct arg_formatter {
- using iterator = buffer_appender<Char>;
- using context = buffer_context<Char>;
+ basic_appender<Char> out;
+ const format_specs& specs;
+ FMT_NO_UNIQUE_ADDRESS locale_ref locale;
- iterator out;
- const format_specs<Char>& specs;
- locale_ref locale;
-
- template <typename T>
- FMT_CONSTEXPR FMT_INLINE auto operator()(T value) -> iterator {
- return detail::write(out, value, specs, locale);
- }
- auto operator()(typename basic_format_arg<context>::handle) -> iterator {
- // User-defined types are handled separately because they require access
- // to the parse context.
- return out;
+ template <typename T, FMT_ENABLE_IF(is_builtin<T>::value)>
+ FMT_CONSTEXPR FMT_INLINE void operator()(T value) {
+ detail::write<Char>(out, value, specs, locale);
}
-};
-struct width_checker {
- template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
- FMT_CONSTEXPR auto operator()(T value) -> unsigned long long {
- if (is_negative(value)) throw_format_error("negative width");
- return static_cast<unsigned long long>(value);
+ template <typename T, FMT_ENABLE_IF(!is_builtin<T>::value)>
+ void operator()(T) {
+ FMT_ASSERT(false, "");
}
- template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
- FMT_CONSTEXPR auto operator()(T) -> unsigned long long {
- throw_format_error("width is not integer");
- return 0;
+ void operator()(typename basic_format_arg<buffered_context<Char>>::handle) {
+ // User-defined types are handled separately because they require access
+ // to the parse context.
}
};
-struct precision_checker {
+struct dynamic_spec_getter {
template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
FMT_CONSTEXPR auto operator()(T value) -> unsigned long long {
- if (is_negative(value)) throw_format_error("negative precision");
- return static_cast<unsigned long long>(value);
+ return is_negative(value) ? ~0ull : static_cast<unsigned long long>(value);
}
template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
FMT_CONSTEXPR auto operator()(T) -> unsigned long long {
- throw_format_error("precision is not integer");
+ report_error("width/precision is not integer");
return 0;
}
};
-template <typename Handler, typename FormatArg>
-FMT_CONSTEXPR auto get_dynamic_spec(FormatArg arg) -> int {
- unsigned long long value = visit_format_arg(Handler(), arg);
- if (value > to_unsigned(max_value<int>()))
- throw_format_error("number is too big");
- return static_cast<int>(value);
-}
-
template <typename Context, typename ID>
-FMT_CONSTEXPR auto get_arg(Context& ctx, ID id) -> decltype(ctx.arg(id)) {
+FMT_CONSTEXPR auto get_arg(Context& ctx, ID id) -> basic_format_arg<Context> {
auto arg = ctx.arg(id);
- if (!arg) ctx.on_error("argument not found");
+ if (!arg) report_error("argument not found");
return arg;
}
-template <typename Handler, typename Context>
-FMT_CONSTEXPR void handle_dynamic_spec(int& value,
- arg_ref<typename Context::char_type> ref,
- Context& ctx) {
- switch (ref.kind) {
- case arg_id_kind::none:
- break;
- case arg_id_kind::index:
- value = detail::get_dynamic_spec<Handler>(get_arg(ctx, ref.val.index));
- break;
- case arg_id_kind::name:
- value = detail::get_dynamic_spec<Handler>(get_arg(ctx, ref.val.name));
- break;
- }
+template <typename Context>
+FMT_CONSTEXPR int get_dynamic_spec(
+ arg_id_kind kind, const arg_ref<typename Context::char_type>& ref,
+ Context& ctx) {
+ FMT_ASSERT(kind != arg_id_kind::none, "");
+ auto arg =
+ kind == arg_id_kind::index ? ctx.arg(ref.index) : ctx.arg(ref.name);
+ if (!arg) report_error("argument not found");
+ unsigned long long value = arg.visit(dynamic_spec_getter());
+ if (value > to_unsigned(max_value<int>()))
+ report_error("width/precision is out of range");
+ return static_cast<int>(value);
}
-#if FMT_USE_USER_DEFINED_LITERALS
-# if FMT_USE_NONTYPE_TEMPLATE_ARGS
+template <typename Context>
+FMT_CONSTEXPR void handle_dynamic_spec(
+ arg_id_kind kind, int& value,
+ const arg_ref<typename Context::char_type>& ref, Context& ctx) {
+ if (kind != arg_id_kind::none) value = get_dynamic_spec(kind, ref, ctx);
+}
+
+#if FMT_USE_NONTYPE_TEMPLATE_ARGS
template <typename T, typename Char, size_t N,
- fmt::detail_exported::fixed_string<Char, N> Str>
-struct statically_named_arg : view {
+ fmt::detail::fixed_string<Char, N> Str>
+struct static_named_arg : view {
static constexpr auto name = Str.data;
const T& value;
- statically_named_arg(const T& v) : value(v) {}
+ static_named_arg(const T& v) : value(v) {}
};
template <typename T, typename Char, size_t N,
- fmt::detail_exported::fixed_string<Char, N> Str>
-struct is_named_arg<statically_named_arg<T, Char, N, Str>> : std::true_type {};
+ fmt::detail::fixed_string<Char, N> Str>
+struct is_named_arg<static_named_arg<T, Char, N, Str>> : std::true_type {};
template <typename T, typename Char, size_t N,
- fmt::detail_exported::fixed_string<Char, N> Str>
-struct is_statically_named_arg<statically_named_arg<T, Char, N, Str>>
- : std::true_type {};
+ fmt::detail::fixed_string<Char, N> Str>
+struct is_static_named_arg<static_named_arg<T, Char, N, Str>> : std::true_type {
+};
-template <typename Char, size_t N,
- fmt::detail_exported::fixed_string<Char, N> Str>
+template <typename Char, size_t N, fmt::detail::fixed_string<Char, N> Str>
struct udl_arg {
template <typename T> auto operator=(T&& value) const {
- return statically_named_arg<T, Char, N, Str>(std::forward<T>(value));
+ return static_named_arg<T, Char, N, Str>(std::forward<T>(value));
}
};
-# else
+#else
template <typename Char> struct udl_arg {
const Char* str;
return {str, std::forward<T>(value)};
}
};
-# endif
-#endif // FMT_USE_USER_DEFINED_LITERALS
+#endif // FMT_USE_NONTYPE_TEMPLATE_ARGS
-template <typename Locale, typename Char>
-auto vformat(const Locale& loc, basic_string_view<Char> fmt,
- basic_format_args<buffer_context<type_identity_t<Char>>> args)
- -> std::basic_string<Char> {
- auto buf = basic_memory_buffer<Char>();
- detail::vformat_to(buf, fmt, args, detail::locale_ref(loc));
- return {buf.data(), buf.size()};
-}
+template <typename Char> struct format_handler {
+ parse_context<Char> parse_ctx;
+ buffered_context<Char> ctx;
-using format_func = void (*)(detail::buffer<char>&, int, const char*);
+ void on_text(const Char* begin, const Char* end) {
+ copy_noinline<Char>(begin, end, ctx.out());
+ }
-FMT_API void format_error_code(buffer<char>& out, int error_code,
- string_view message) noexcept;
+ FMT_CONSTEXPR auto on_arg_id() -> int { return parse_ctx.next_arg_id(); }
+ FMT_CONSTEXPR auto on_arg_id(int id) -> int {
+ parse_ctx.check_arg_id(id);
+ return id;
+ }
+ FMT_CONSTEXPR auto on_arg_id(basic_string_view<Char> id) -> int {
+ parse_ctx.check_arg_id(id);
+ int arg_id = ctx.arg_id(id);
+ if (arg_id < 0) report_error("argument not found");
+ return arg_id;
+ }
-FMT_API void report_error(format_func func, int error_code,
- const char* message) noexcept;
-} // namespace detail
+ FMT_INLINE void on_replacement_field(int id, const Char*) {
+ ctx.arg(id).visit(default_arg_formatter<Char>{ctx.out()});
+ }
-FMT_API auto vsystem_error(int error_code, string_view format_str,
- format_args args) -> std::system_error;
+ auto on_format_specs(int id, const Char* begin, const Char* end)
+ -> const Char* {
+ auto arg = get_arg(ctx, id);
+ // Not using a visitor for custom types gives better codegen.
+ if (arg.format_custom(begin, parse_ctx, ctx)) return parse_ctx.begin();
-/**
- \rst
- Constructs :class:`std::system_error` with a message formatted with
- ``fmt::format(fmt, args...)``.
- *error_code* is a system error code as given by ``errno``.
-
- **Example**::
-
- // This throws std::system_error with the description
- // cannot open file 'madeup': No such file or directory
- // or similar (system message may vary).
- const char* filename = "madeup";
- std::FILE* file = std::fopen(filename, "r");
- if (!file)
- throw fmt::system_error(errno, "cannot open file '{}'", filename);
- \endrst
- */
-template <typename... T>
-auto system_error(int error_code, format_string<T...> fmt, T&&... args)
- -> std::system_error {
- return vsystem_error(error_code, fmt, fmt::make_format_args(args...));
-}
+ auto specs = dynamic_format_specs<Char>();
+ begin = parse_format_specs(begin, end, specs, parse_ctx, arg.type());
+ if (specs.dynamic()) {
+ handle_dynamic_spec(specs.dynamic_width(), specs.width, specs.width_ref,
+ ctx);
+ handle_dynamic_spec(specs.dynamic_precision(), specs.precision,
+ specs.precision_ref, ctx);
+ }
-/**
- \rst
- Formats an error message for an error returned by an operating system or a
- language runtime, for example a file opening error, and writes it to *out*.
- The format is the same as the one used by ``std::system_error(ec, message)``
- where ``ec`` is ``std::error_code(error_code, std::generic_category()})``.
- It is implementation-defined but normally looks like:
-
- .. parsed-literal::
- *<message>*: *<system-message>*
-
- where *<message>* is the passed message and *<system-message>* is the system
- message corresponding to the error code.
- *error_code* is a system error code as given by ``errno``.
- \endrst
- */
-FMT_API void format_system_error(detail::buffer<char>& out, int error_code,
- const char* message) noexcept;
+ arg.visit(arg_formatter<Char>{ctx.out(), specs, ctx.locale()});
+ return begin;
+ }
-// Reports a system error without throwing an exception.
-// Can be used to report errors from destructors.
-FMT_API void report_system_error(int error_code, const char* message) noexcept;
+ FMT_NORETURN void on_error(const char* message) { report_error(message); }
+};
-/** Fast integer formatter. */
-class format_int {
+using format_func = void (*)(detail::buffer<char>&, int, const char*);
+FMT_API void do_report_error(format_func func, int error_code,
+ const char* message) noexcept;
+
+FMT_API void format_error_code(buffer<char>& out, int error_code,
+ string_view message) noexcept;
+
+template <typename T, typename Char, type TYPE>
+template <typename FormatContext>
+FMT_CONSTEXPR auto native_formatter<T, Char, TYPE>::format(
+ const T& val, FormatContext& ctx) const -> decltype(ctx.out()) {
+ if (!specs_.dynamic())
+ return write<Char>(ctx.out(), val, specs_, ctx.locale());
+ auto specs = format_specs(specs_);
+ handle_dynamic_spec(specs.dynamic_width(), specs.width, specs_.width_ref,
+ ctx);
+ handle_dynamic_spec(specs.dynamic_precision(), specs.precision,
+ specs_.precision_ref, ctx);
+ return write<Char>(ctx.out(), val, specs, ctx.locale());
+}
+
+// DEPRECATED! https://github.com/fmtlib/fmt/issues/4292.
+template <typename T, typename Enable = void>
+struct is_locale : std::false_type {};
+template <typename T>
+struct is_locale<T, void_t<decltype(T::classic())>> : std::true_type {};
+
+// DEPRECATED!
+template <typename Char = char> struct vformat_args {
+ using type = basic_format_args<buffered_context<Char>>;
+};
+template <> struct vformat_args<char> {
+ using type = format_args;
+};
+
+template <typename Char>
+void vformat_to(buffer<Char>& buf, basic_string_view<Char> fmt,
+ typename vformat_args<Char>::type args, locale_ref loc = {}) {
+ auto out = basic_appender<Char>(buf);
+ parse_format_string(
+ fmt, format_handler<Char>{parse_context<Char>(fmt), {out, args, loc}});
+}
+} // namespace detail
+
+FMT_BEGIN_EXPORT
+
+// A generic formatting context with custom output iterator and character
+// (code unit) support. Char is the format string code unit type which can be
+// different from OutputIt::value_type.
+template <typename OutputIt, typename Char> class generic_context {
private:
- // Buffer should be large enough to hold all digits (digits10 + 1),
- // a sign and a null character.
- enum { buffer_size = std::numeric_limits<unsigned long long>::digits10 + 3 };
- mutable char buffer_[buffer_size];
- char* str_;
+ OutputIt out_;
+ basic_format_args<generic_context> args_;
+ detail::locale_ref loc_;
- template <typename UInt> auto format_unsigned(UInt value) -> char* {
- auto n = static_cast<detail::uint32_or_64_or_128_t<UInt>>(value);
- return detail::format_decimal(buffer_, n, buffer_size - 1).begin;
+ public:
+ using char_type = Char;
+ using iterator = OutputIt;
+ using parse_context_type FMT_DEPRECATED = parse_context<Char>;
+ template <typename T>
+ using formatter_type FMT_DEPRECATED = formatter<T, Char>;
+ enum { builtin_types = FMT_BUILTIN_TYPES };
+
+ constexpr generic_context(OutputIt out,
+ basic_format_args<generic_context> args,
+ detail::locale_ref loc = {})
+ : out_(out), args_(args), loc_(loc) {}
+ generic_context(generic_context&&) = default;
+ generic_context(const generic_context&) = delete;
+ void operator=(const generic_context&) = delete;
+
+ constexpr auto arg(int id) const -> basic_format_arg<generic_context> {
+ return args_.get(id);
+ }
+ auto arg(basic_string_view<Char> name) const
+ -> basic_format_arg<generic_context> {
+ return args_.get(name);
+ }
+ constexpr auto arg_id(basic_string_view<Char> name) const -> int {
+ return args_.get_id(name);
}
- template <typename Int> auto format_signed(Int value) -> char* {
- auto abs_value = static_cast<detail::uint32_or_64_or_128_t<Int>>(value);
- bool negative = value < 0;
- if (negative) abs_value = 0 - abs_value;
- auto begin = format_unsigned(abs_value);
- if (negative) *--begin = '-';
- return begin;
+ constexpr auto out() const -> iterator { return out_; }
+
+ void advance_to(iterator it) {
+ if (!detail::is_back_insert_iterator<iterator>()) out_ = it;
}
+ constexpr auto locale() const -> detail::locale_ref { return loc_; }
+};
+
+class loc_value {
+ private:
+ basic_format_arg<context> value_;
+
public:
- explicit format_int(int value) : str_(format_signed(value)) {}
- explicit format_int(long value) : str_(format_signed(value)) {}
- explicit format_int(long long value) : str_(format_signed(value)) {}
- explicit format_int(unsigned value) : str_(format_unsigned(value)) {}
- explicit format_int(unsigned long value) : str_(format_unsigned(value)) {}
- explicit format_int(unsigned long long value)
- : str_(format_unsigned(value)) {}
+ template <typename T, FMT_ENABLE_IF(!detail::is_float128<T>::value)>
+ loc_value(T value) : value_(value) {}
- /** Returns the number of characters written to the output buffer. */
- auto size() const -> size_t {
- return detail::to_unsigned(buffer_ - str_ + buffer_size - 1);
+ template <typename T, FMT_ENABLE_IF(detail::is_float128<T>::value)>
+ loc_value(T) {}
+
+ template <typename Visitor> auto visit(Visitor&& vis) -> decltype(vis(0)) {
+ return value_.visit(vis);
}
+};
- /**
- Returns a pointer to the output buffer content. No terminating null
- character is appended.
- */
- auto data() const -> const char* { return str_; }
+// A locale facet that formats values in UTF-8.
+// It is parameterized on the locale to avoid the heavy <locale> include.
+template <typename Locale> class format_facet : public Locale::facet {
+ private:
+ std::string separator_;
+ std::string grouping_;
+ std::string decimal_point_;
- /**
- Returns a pointer to the output buffer content with terminating null
- character appended.
- */
- auto c_str() const -> const char* {
- buffer_[buffer_size - 1] = '\0';
- return str_;
- }
+ protected:
+ virtual auto do_put(appender out, loc_value val,
+ const format_specs& specs) const -> bool;
- /**
- \rst
- Returns the content of the output buffer as an ``std::string``.
- \endrst
- */
- auto str() const -> std::string { return std::string(str_, size()); }
-};
+ public:
+ static FMT_API typename Locale::id id;
-template <typename T, typename Char>
-struct formatter<T, Char, enable_if_t<detail::has_format_as<T>::value>>
- : formatter<detail::format_as_t<T>, Char> {
- template <typename FormatContext>
- auto format(const T& value, FormatContext& ctx) const -> decltype(ctx.out()) {
- using base = formatter<detail::format_as_t<T>, Char>;
- return base::format(format_as(value), ctx);
+ explicit format_facet(Locale& loc);
+ explicit format_facet(string_view sep = "", std::string grouping = "\3",
+ std::string decimal_point = ".")
+ : separator_(sep.data(), sep.size()),
+ grouping_(grouping),
+ decimal_point_(decimal_point) {}
+
+ auto put(appender out, loc_value val, const format_specs& specs) const
+ -> bool {
+ return do_put(out, val, specs);
}
};
-#define FMT_FORMAT_AS(Type, Base) \
- template <typename Char> \
- struct formatter<Type, Char> : formatter<Base, Char> {}
+#define FMT_FORMAT_AS(Type, Base) \
+ template <typename Char> \
+ struct formatter<Type, Char> : formatter<Base, Char> { \
+ template <typename FormatContext> \
+ FMT_CONSTEXPR auto format(Type value, FormatContext& ctx) const \
+ -> decltype(ctx.out()) { \
+ return formatter<Base, Char>::format(value, ctx); \
+ } \
+ }
FMT_FORMAT_AS(signed char, int);
FMT_FORMAT_AS(unsigned char, unsigned);
FMT_FORMAT_AS(long, detail::long_type);
FMT_FORMAT_AS(unsigned long, detail::ulong_type);
FMT_FORMAT_AS(Char*, const Char*);
-FMT_FORMAT_AS(std::basic_string<Char>, basic_string_view<Char>);
-FMT_FORMAT_AS(std::nullptr_t, const void*);
FMT_FORMAT_AS(detail::std_string_view<Char>, basic_string_view<Char>);
+FMT_FORMAT_AS(std::nullptr_t, const void*);
FMT_FORMAT_AS(void*, const void*);
template <typename Char, size_t N>
struct formatter<Char[N], Char> : formatter<basic_string_view<Char>, Char> {};
-/**
- \rst
- Converts ``p`` to ``const void*`` for pointer formatting.
+template <typename Char, typename Traits, typename Allocator>
+class formatter<std::basic_string<Char, Traits, Allocator>, Char>
+ : public formatter<basic_string_view<Char>, Char> {};
- **Example**::
+template <int N, typename Char>
+struct formatter<detail::bitint<N>, Char> : formatter<long long, Char> {};
+template <int N, typename Char>
+struct formatter<detail::ubitint<N>, Char>
+ : formatter<unsigned long long, Char> {};
- auto s = fmt::format("{}", fmt::ptr(p));
- \endrst
+template <typename Char>
+struct formatter<detail::float128, Char>
+ : detail::native_formatter<detail::float128, Char,
+ detail::type::float_type> {};
+
+template <typename T, typename Char>
+struct formatter<T, Char, void_t<detail::format_as_result<T>>>
+ : formatter<detail::format_as_result<T>, Char> {
+ template <typename FormatContext>
+ FMT_CONSTEXPR auto format(const T& value, FormatContext& ctx) const
+ -> decltype(ctx.out()) {
+ auto&& val = format_as(value); // Make an lvalue reference for format.
+ return formatter<detail::format_as_result<T>, Char>::format(val, ctx);
+ }
+};
+
+/**
+ * Converts `p` to `const void*` for pointer formatting.
+ *
+ * **Example**:
+ *
+ * auto s = fmt::format("{}", fmt::ptr(p));
*/
template <typename T> auto ptr(T p) -> const void* {
static_assert(std::is_pointer<T>::value, "");
return detail::bit_cast<const void*>(p);
}
-template <typename T, typename Deleter>
-auto ptr(const std::unique_ptr<T, Deleter>& p) -> const void* {
- return p.get();
-}
-template <typename T> auto ptr(const std::shared_ptr<T>& p) -> const void* {
- return p.get();
-}
/**
- \rst
- Converts ``e`` to the underlying type.
-
- **Example**::
-
- enum class color { red, green, blue };
- auto s = fmt::format("{}", fmt::underlying(color::red));
- \endrst
+ * Converts `e` to the underlying type.
+ *
+ * **Example**:
+ *
+ * enum class color { red, green, blue };
+ * auto s = fmt::format("{}", fmt::underlying(color::red)); // s == "0"
*/
template <typename Enum>
constexpr auto underlying(Enum e) noexcept -> underlying_t<Enum> {
}
} // namespace enums
-class bytes {
- private:
- string_view data_;
- friend struct formatter<bytes>;
+#ifdef __cpp_lib_byte
+template <> struct formatter<std::byte> : formatter<unsigned> {
+ static auto format_as(std::byte b) -> unsigned char {
+ return static_cast<unsigned char>(b);
+ }
+ template <typename Context>
+ auto format(std::byte b, Context& ctx) const -> decltype(ctx.out()) {
+ return formatter<unsigned>::format(format_as(b), ctx);
+ }
+};
+#endif
- public:
- explicit bytes(string_view data) : data_(data) {}
+struct bytes {
+ string_view data;
+
+ inline explicit bytes(string_view s) : data(s) {}
};
template <> struct formatter<bytes> {
detail::dynamic_format_specs<> specs_;
public:
- template <typename ParseContext>
- FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const char* {
+ FMT_CONSTEXPR auto parse(parse_context<>& ctx) -> const char* {
return parse_format_specs(ctx.begin(), ctx.end(), specs_, ctx,
detail::type::string_type);
}
template <typename FormatContext>
- auto format(bytes b, FormatContext& ctx) -> decltype(ctx.out()) {
- detail::handle_dynamic_spec<detail::width_checker>(specs_.width,
- specs_.width_ref, ctx);
- detail::handle_dynamic_spec<detail::precision_checker>(
- specs_.precision, specs_.precision_ref, ctx);
- return detail::write_bytes(ctx.out(), b.data_, specs_);
+ auto format(bytes b, FormatContext& ctx) const -> decltype(ctx.out()) {
+ auto specs = specs_;
+ detail::handle_dynamic_spec(specs.dynamic_width(), specs.width,
+ specs.width_ref, ctx);
+ detail::handle_dynamic_spec(specs.dynamic_precision(), specs.precision,
+ specs.precision_ref, ctx);
+ return detail::write_bytes<char>(ctx.out(), b.data, specs);
}
};
};
/**
- \rst
- Returns a view that formats an integer value using ',' as a locale-independent
- thousands separator.
-
- **Example**::
-
- fmt::print("{}", fmt::group_digits(12345));
- // Output: "12,345"
- \endrst
+ * Returns a view that formats an integer value using ',' as a
+ * locale-independent thousands separator.
+ *
+ * **Example**:
+ *
+ * fmt::print("{}", fmt::group_digits(12345));
+ * // Output: "12,345"
*/
template <typename T> auto group_digits(T value) -> group_digits_view<T> {
return {value};
detail::dynamic_format_specs<> specs_;
public:
- template <typename ParseContext>
- FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const char* {
+ FMT_CONSTEXPR auto parse(parse_context<>& ctx) -> const char* {
return parse_format_specs(ctx.begin(), ctx.end(), specs_, ctx,
detail::type::int_type);
}
template <typename FormatContext>
- auto format(group_digits_view<T> t, FormatContext& ctx)
+ auto format(group_digits_view<T> view, FormatContext& ctx) const
-> decltype(ctx.out()) {
- detail::handle_dynamic_spec<detail::width_checker>(specs_.width,
- specs_.width_ref, ctx);
- detail::handle_dynamic_spec<detail::precision_checker>(
- specs_.precision, specs_.precision_ref, ctx);
+ auto specs = specs_;
+ detail::handle_dynamic_spec(specs.dynamic_width(), specs.width,
+ specs.width_ref, ctx);
+ detail::handle_dynamic_spec(specs.dynamic_precision(), specs.precision,
+ specs.precision_ref, ctx);
+ auto arg = detail::make_write_int_arg(view.value, specs.sign());
return detail::write_int(
- ctx.out(), static_cast<detail::uint64_or_128_t<T>>(t.value), 0, specs_,
- detail::digit_grouping<char>("\3", ","));
+ ctx.out(), static_cast<detail::uint64_or_128_t<T>>(arg.abs_value),
+ arg.prefix, specs, detail::digit_grouping<char>("\3", ","));
}
};
-template <typename T> struct nested_view {
- const formatter<T>* fmt;
+template <typename T, typename Char> struct nested_view {
+ const formatter<T, Char>* fmt;
const T* value;
};
-template <typename T> struct formatter<nested_view<T>> {
- FMT_CONSTEXPR auto parse(format_parse_context& ctx) -> const char* {
+template <typename T, typename Char>
+struct formatter<nested_view<T, Char>, Char> {
+ FMT_CONSTEXPR auto parse(parse_context<Char>& ctx) -> const Char* {
return ctx.begin();
}
- auto format(nested_view<T> view, format_context& ctx) const
+ template <typename FormatContext>
+ auto format(nested_view<T, Char> view, FormatContext& ctx) const
-> decltype(ctx.out()) {
return view.fmt->format(*view.value, ctx);
}
};
-template <typename T> struct nested_formatter {
+template <typename T, typename Char = char> struct nested_formatter {
private:
+ basic_specs specs_;
int width_;
- detail::fill_t<char> fill_;
- align_t align_ : 4;
- formatter<T> formatter_;
+ formatter<T, Char> formatter_;
public:
- constexpr nested_formatter() : width_(0), align_(align_t::none) {}
-
- FMT_CONSTEXPR auto parse(format_parse_context& ctx) -> const char* {
- auto specs = detail::dynamic_format_specs<char>();
- auto it = parse_format_specs(ctx.begin(), ctx.end(), specs, ctx,
- detail::type::none_type);
- width_ = specs.width;
- fill_ = specs.fill;
- align_ = specs.align;
+ constexpr nested_formatter() : width_(0) {}
+
+ FMT_CONSTEXPR auto parse(parse_context<Char>& ctx) -> const Char* {
+ auto it = ctx.begin(), end = ctx.end();
+ if (it == end) return it;
+ auto specs = format_specs();
+ it = detail::parse_align(it, end, specs);
+ specs_ = specs;
+ Char c = *it;
+ auto width_ref = detail::arg_ref<Char>();
+ if ((c >= '0' && c <= '9') || c == '{') {
+ it = detail::parse_width(it, end, specs, width_ref, ctx);
+ width_ = specs.width;
+ }
ctx.advance_to(it);
return formatter_.parse(ctx);
}
- template <typename F>
- auto write_padded(format_context& ctx, F write) const -> decltype(ctx.out()) {
+ template <typename FormatContext, typename F>
+ auto write_padded(FormatContext& ctx, F write) const -> decltype(ctx.out()) {
if (width_ == 0) return write(ctx.out());
- auto buf = memory_buffer();
- write(std::back_inserter(buf));
- auto specs = format_specs<>();
+ auto buf = basic_memory_buffer<Char>();
+ write(basic_appender<Char>(buf));
+ auto specs = format_specs();
specs.width = width_;
- specs.fill = fill_;
- specs.align = align_;
- return detail::write(ctx.out(), string_view(buf.data(), buf.size()), specs);
+ specs.copy_fill_from(specs_);
+ specs.set_align(specs_.align());
+ return detail::write<Char>(
+ ctx.out(), basic_string_view<Char>(buf.data(), buf.size()), specs);
}
- auto nested(const T& value) const -> nested_view<T> {
- return nested_view<T>{&formatter_, &value};
+ auto nested(const T& value) const -> nested_view<T, Char> {
+ return nested_view<T, Char>{&formatter_, &value};
}
};
-// DEPRECATED! join_view will be moved to ranges.h.
-template <typename It, typename Sentinel, typename Char = char>
-struct join_view : detail::view {
- It begin;
- Sentinel end;
- basic_string_view<Char> sep;
-
- join_view(It b, Sentinel e, basic_string_view<Char> s)
- : begin(b), end(e), sep(s) {}
-};
-
-template <typename It, typename Sentinel, typename Char>
-struct formatter<join_view<It, Sentinel, Char>, Char> {
- private:
- using value_type =
-#ifdef __cpp_lib_ranges
- std::iter_value_t<It>;
-#else
- typename std::iterator_traits<It>::value_type;
-#endif
- formatter<remove_cvref_t<value_type>, Char> value_formatter_;
-
- public:
- template <typename ParseContext>
- FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const Char* {
- return value_formatter_.parse(ctx);
- }
-
- template <typename FormatContext>
- auto format(const join_view<It, Sentinel, Char>& value,
- FormatContext& ctx) const -> decltype(ctx.out()) {
- auto it = value.begin;
- auto out = ctx.out();
- if (it != value.end) {
- out = value_formatter_.format(*it, ctx);
- ++it;
- while (it != value.end) {
- out = detail::copy_str<Char>(value.sep.begin(), value.sep.end(), out);
- ctx.advance_to(out);
- out = value_formatter_.format(*it, ctx);
- ++it;
- }
- }
- return out;
- }
-};
-
-/**
- Returns a view that formats the iterator range `[begin, end)` with elements
- separated by `sep`.
- */
-template <typename It, typename Sentinel>
-auto join(It begin, Sentinel end, string_view sep) -> join_view<It, Sentinel> {
- return {begin, end, sep};
+inline namespace literals {
+#if FMT_USE_NONTYPE_TEMPLATE_ARGS
+template <detail::fixed_string S> constexpr auto operator""_a() {
+ using char_t = remove_cvref_t<decltype(*S.data)>;
+ return detail::udl_arg<char_t, sizeof(S.data) / sizeof(char_t), S>();
}
-
+#else
/**
- \rst
- Returns a view that formats `range` with elements separated by `sep`.
-
- **Example**::
-
- std::vector<int> v = {1, 2, 3};
- fmt::print("{}", fmt::join(v, ", "));
- // Output: "1, 2, 3"
-
- ``fmt::join`` applies passed format specifiers to the range elements::
-
- fmt::print("{:02}", fmt::join(v, ", "));
- // Output: "01, 02, 03"
- \endrst
+ * User-defined literal equivalent of `fmt::arg`.
+ *
+ * **Example**:
+ *
+ * using namespace fmt::literals;
+ * fmt::print("The answer is {answer}.", "answer"_a=42);
*/
-template <typename Range>
-auto join(Range&& range, string_view sep)
- -> join_view<detail::iterator_t<Range>, detail::sentinel_t<Range>> {
- return join(std::begin(range), std::end(range), sep);
+constexpr auto operator""_a(const char* s, size_t) -> detail::udl_arg<char> {
+ return {s};
}
+#endif // FMT_USE_NONTYPE_TEMPLATE_ARGS
+} // namespace literals
-/**
- \rst
- Converts *value* to ``std::string`` using the default format for type *T*.
-
- **Example**::
-
- #include <fmt/format.h>
-
- std::string answer = fmt::to_string(42);
- \endrst
- */
-template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value &&
- !detail::has_format_as<T>::value)>
-inline auto to_string(const T& value) -> std::string {
- auto buffer = memory_buffer();
- detail::write<char>(appender(buffer), value);
- return {buffer.data(), buffer.size()};
-}
+/// A fast integer formatter.
+class format_int {
+ private:
+ // Buffer should be large enough to hold all digits (digits10 + 1),
+ // a sign and a null character.
+ enum { buffer_size = std::numeric_limits<unsigned long long>::digits10 + 3 };
+ mutable char buffer_[buffer_size];
+ char* str_;
-template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
-FMT_NODISCARD inline auto to_string(T value) -> std::string {
- // The buffer should be large enough to store the number including the sign
- // or "false" for bool.
- constexpr int max_size = detail::digits10<T>() + 2;
- char buffer[max_size > 5 ? static_cast<unsigned>(max_size) : 5];
- char* begin = buffer;
- return std::string(begin, detail::write<char>(begin, value));
-}
+ template <typename UInt>
+ FMT_CONSTEXPR20 auto format_unsigned(UInt value) -> char* {
+ auto n = static_cast<detail::uint32_or_64_or_128_t<UInt>>(value);
+ return detail::do_format_decimal(buffer_, n, buffer_size - 1);
+ }
-template <typename Char, size_t SIZE>
-FMT_NODISCARD auto to_string(const basic_memory_buffer<Char, SIZE>& buf)
- -> std::basic_string<Char> {
- auto size = buf.size();
- detail::assume(size < std::basic_string<Char>().max_size());
- return std::basic_string<Char>(buf.data(), size);
-}
+ template <typename Int>
+ FMT_CONSTEXPR20 auto format_signed(Int value) -> char* {
+ auto abs_value = static_cast<detail::uint32_or_64_or_128_t<Int>>(value);
+ bool negative = value < 0;
+ if (negative) abs_value = 0 - abs_value;
+ auto begin = format_unsigned(abs_value);
+ if (negative) *--begin = '-';
+ return begin;
+ }
-template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value &&
- detail::has_format_as<T>::value)>
-inline auto to_string(const T& value) -> std::string {
- return to_string(format_as(value));
-}
+ public:
+ FMT_CONSTEXPR20 explicit format_int(int value) : str_(format_signed(value)) {}
+ FMT_CONSTEXPR20 explicit format_int(long value)
+ : str_(format_signed(value)) {}
+ FMT_CONSTEXPR20 explicit format_int(long long value)
+ : str_(format_signed(value)) {}
+ FMT_CONSTEXPR20 explicit format_int(unsigned value)
+ : str_(format_unsigned(value)) {}
+ FMT_CONSTEXPR20 explicit format_int(unsigned long value)
+ : str_(format_unsigned(value)) {}
+ FMT_CONSTEXPR20 explicit format_int(unsigned long long value)
+ : str_(format_unsigned(value)) {}
-FMT_END_EXPORT
+ /// Returns the number of characters written to the output buffer.
+ FMT_CONSTEXPR20 auto size() const -> size_t {
+ return detail::to_unsigned(buffer_ - str_ + buffer_size - 1);
+ }
-namespace detail {
+ /// Returns a pointer to the output buffer content. No terminating null
+ /// character is appended.
+ FMT_CONSTEXPR20 auto data() const -> const char* { return str_; }
-template <typename Char>
-void vformat_to(buffer<Char>& buf, basic_string_view<Char> fmt,
- typename vformat_args<Char>::type args, locale_ref loc) {
- auto out = buffer_appender<Char>(buf);
- if (fmt.size() == 2 && equal2(fmt.data(), "{}")) {
- auto arg = args.get(0);
- if (!arg) throw_format_error("argument not found");
- visit_format_arg(default_arg_formatter<Char>{out, args, loc}, arg);
- return;
+ /// Returns a pointer to the output buffer content with terminating null
+ /// character appended.
+ FMT_CONSTEXPR20 auto c_str() const -> const char* {
+ buffer_[buffer_size - 1] = '\0';
+ return str_;
}
- struct format_handler : error_handler {
- basic_format_parse_context<Char> parse_context;
- buffer_context<Char> context;
-
- format_handler(buffer_appender<Char> p_out, basic_string_view<Char> str,
- basic_format_args<buffer_context<Char>> p_args,
- locale_ref p_loc)
- : parse_context(str), context(p_out, p_args, p_loc) {}
+ /// Returns the content of the output buffer as an `std::string`.
+ inline auto str() const -> std::string { return {str_, size()}; }
+};
- void on_text(const Char* begin, const Char* end) {
- auto text = basic_string_view<Char>(begin, to_unsigned(end - begin));
- context.advance_to(write<Char>(context.out(), text));
- }
+#define FMT_STRING_IMPL(s, base) \
+ [] { \
+ /* Use the hidden visibility as a workaround for a GCC bug (#1973). */ \
+ /* Use a macro-like name to avoid shadowing warnings. */ \
+ struct FMT_VISIBILITY("hidden") FMT_COMPILE_STRING : base { \
+ using char_type = fmt::remove_cvref_t<decltype(s[0])>; \
+ constexpr explicit operator fmt::basic_string_view<char_type>() const { \
+ return fmt::detail::compile_string_to_view<char_type>(s); \
+ } \
+ }; \
+ using FMT_STRING_VIEW = \
+ fmt::basic_string_view<typename FMT_COMPILE_STRING::char_type>; \
+ fmt::detail::ignore_unused(FMT_STRING_VIEW(FMT_COMPILE_STRING())); \
+ return FMT_COMPILE_STRING(); \
+ }()
- FMT_CONSTEXPR auto on_arg_id() -> int {
- return parse_context.next_arg_id();
- }
- FMT_CONSTEXPR auto on_arg_id(int id) -> int {
- return parse_context.check_arg_id(id), id;
- }
- FMT_CONSTEXPR auto on_arg_id(basic_string_view<Char> id) -> int {
- int arg_id = context.arg_id(id);
- if (arg_id < 0) throw_format_error("argument not found");
- return arg_id;
- }
+/**
+ * Constructs a legacy compile-time format string from a string literal `s`.
+ *
+ * **Example**:
+ *
+ * // A compile-time error because 'd' is an invalid specifier for strings.
+ * std::string s = fmt::format(FMT_STRING("{:d}"), "foo");
+ */
+#define FMT_STRING(s) FMT_STRING_IMPL(s, fmt::detail::compile_string)
- FMT_INLINE void on_replacement_field(int id, const Char*) {
- auto arg = get_arg(context, id);
- context.advance_to(visit_format_arg(
- default_arg_formatter<Char>{context.out(), context.args(),
- context.locale()},
- arg));
- }
+FMT_API auto vsystem_error(int error_code, string_view fmt, format_args args)
+ -> std::system_error;
- auto on_format_specs(int id, const Char* begin, const Char* end)
- -> const Char* {
- auto arg = get_arg(context, id);
- // Not using a visitor for custom types gives better codegen.
- if (arg.format_custom(begin, parse_context, context))
- return parse_context.begin();
- auto specs = detail::dynamic_format_specs<Char>();
- begin = parse_format_specs(begin, end, specs, parse_context, arg.type());
- detail::handle_dynamic_spec<detail::width_checker>(
- specs.width, specs.width_ref, context);
- detail::handle_dynamic_spec<detail::precision_checker>(
- specs.precision, specs.precision_ref, context);
- if (begin == end || *begin != '}')
- throw_format_error("missing '}' in format string");
- auto f = arg_formatter<Char>{context.out(), specs, context.locale()};
- context.advance_to(visit_format_arg(f, arg));
- return begin;
- }
- };
- detail::parse_format_string<false>(fmt, format_handler(out, fmt, args, loc));
+/**
+ * Constructs `std::system_error` with a message formatted with
+ * `fmt::format(fmt, args...)`.
+ * `error_code` is a system error code as given by `errno`.
+ *
+ * **Example**:
+ *
+ * // This throws std::system_error with the description
+ * // cannot open file 'madeup': No such file or directory
+ * // or similar (system message may vary).
+ * const char* filename = "madeup";
+ * FILE* file = fopen(filename, "r");
+ * if (!file)
+ * throw fmt::system_error(errno, "cannot open file '{}'", filename);
+ */
+template <typename... T>
+auto system_error(int error_code, format_string<T...> fmt, T&&... args)
+ -> std::system_error {
+ return vsystem_error(error_code, fmt.str, vargs<T...>{{args...}});
}
-FMT_BEGIN_EXPORT
-
-#ifndef FMT_HEADER_ONLY
-extern template FMT_API void vformat_to(buffer<char>&, string_view,
- typename vformat_args<>::type,
- locale_ref);
-extern template FMT_API auto thousands_sep_impl<char>(locale_ref)
- -> thousands_sep_result<char>;
-extern template FMT_API auto thousands_sep_impl<wchar_t>(locale_ref)
- -> thousands_sep_result<wchar_t>;
-extern template FMT_API auto decimal_point_impl(locale_ref) -> char;
-extern template FMT_API auto decimal_point_impl(locale_ref) -> wchar_t;
-#endif // FMT_HEADER_ONLY
-
-} // namespace detail
-
-#if FMT_USE_USER_DEFINED_LITERALS
-inline namespace literals {
/**
- \rst
- User-defined literal equivalent of :func:`fmt::arg`.
-
- **Example**::
-
- using namespace fmt::literals;
- fmt::print("Elapsed time: {s:.2f} seconds", "s"_a=1.23);
- \endrst
+ * Formats an error message for an error returned by an operating system or a
+ * language runtime, for example a file opening error, and writes it to `out`.
+ * The format is the same as the one used by `std::system_error(ec, message)`
+ * where `ec` is `std::error_code(error_code, std::generic_category())`.
+ * It is implementation-defined but normally looks like:
+ *
+ * <message>: <system-message>
+ *
+ * where `<message>` is the passed message and `<system-message>` is the system
+ * message corresponding to the error code.
+ * `error_code` is a system error code as given by `errno`.
*/
-# if FMT_USE_NONTYPE_TEMPLATE_ARGS
-template <detail_exported::fixed_string Str> constexpr auto operator""_a() {
- using char_t = remove_cvref_t<decltype(Str.data[0])>;
- return detail::udl_arg<char_t, sizeof(Str.data) / sizeof(char_t), Str>();
-}
-# else
-constexpr auto operator""_a(const char* s, size_t) -> detail::udl_arg<char> {
- return {s};
-}
-# endif
-} // namespace literals
-#endif // FMT_USE_USER_DEFINED_LITERALS
+FMT_API void format_system_error(detail::buffer<char>& out, int error_code,
+ const char* message) noexcept;
+
+// Reports a system error without throwing an exception.
+// Can be used to report errors from destructors.
+FMT_API void report_system_error(int error_code, const char* message) noexcept;
template <typename Locale, FMT_ENABLE_IF(detail::is_locale<Locale>::value)>
inline auto vformat(const Locale& loc, string_view fmt, format_args args)
-> std::string {
- return detail::vformat(loc, fmt, args);
+ auto buf = memory_buffer();
+ detail::vformat_to(buf, fmt, args, detail::locale_ref(loc));
+ return {buf.data(), buf.size()};
}
template <typename Locale, typename... T,
FMT_ENABLE_IF(detail::is_locale<Locale>::value)>
-inline auto format(const Locale& loc, format_string<T...> fmt, T&&... args)
+FMT_INLINE auto format(const Locale& loc, format_string<T...> fmt, T&&... args)
-> std::string {
- return fmt::vformat(loc, string_view(fmt), fmt::make_format_args(args...));
+ return vformat(loc, fmt.str, vargs<T...>{{args...}});
}
template <typename OutputIt, typename Locale,
- FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value&&
- detail::is_locale<Locale>::value)>
+ FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
auto vformat_to(OutputIt out, const Locale& loc, string_view fmt,
format_args args) -> OutputIt {
- using detail::get_buffer;
- auto&& buf = get_buffer<char>(out);
+ auto&& buf = detail::get_buffer<char>(out);
detail::vformat_to(buf, fmt, args, detail::locale_ref(loc));
return detail::get_iterator(buf, out);
}
detail::is_locale<Locale>::value)>
FMT_INLINE auto format_to(OutputIt out, const Locale& loc,
format_string<T...> fmt, T&&... args) -> OutputIt {
- return vformat_to(out, loc, fmt, fmt::make_format_args(args...));
+ return fmt::vformat_to(out, loc, fmt.str, vargs<T...>{{args...}});
}
template <typename Locale, typename... T,
format_string<T...> fmt,
T&&... args) -> size_t {
auto buf = detail::counting_buffer<>();
- detail::vformat_to<char>(buf, fmt, fmt::make_format_args(args...),
- detail::locale_ref(loc));
+ detail::vformat_to(buf, fmt.str, vargs<T...>{{args...}},
+ detail::locale_ref(loc));
return buf.count();
}
-FMT_END_EXPORT
+FMT_API auto vformat(string_view fmt, format_args args) -> std::string;
-template <typename T, typename Char>
-template <typename FormatContext>
-FMT_CONSTEXPR FMT_INLINE auto
-formatter<T, Char,
- enable_if_t<detail::type_constant<T, Char>::value !=
- detail::type::custom_type>>::format(const T& val,
- FormatContext& ctx)
- const -> decltype(ctx.out()) {
- if (specs_.width_ref.kind == detail::arg_id_kind::none &&
- specs_.precision_ref.kind == detail::arg_id_kind::none) {
- return detail::write<Char>(ctx.out(), val, specs_, ctx.locale());
- }
- auto specs = specs_;
- detail::handle_dynamic_spec<detail::width_checker>(specs.width,
- specs.width_ref, ctx);
- detail::handle_dynamic_spec<detail::precision_checker>(
- specs.precision, specs.precision_ref, ctx);
- return detail::write<Char>(ctx.out(), val, specs, ctx.locale());
+/**
+ * Formats `args` according to specifications in `fmt` and returns the result
+ * as a string.
+ *
+ * **Example**:
+ *
+ * #include <fmt/format.h>
+ * std::string message = fmt::format("The answer is {}.", 42);
+ */
+template <typename... T>
+FMT_NODISCARD FMT_INLINE auto format(format_string<T...> fmt, T&&... args)
+ -> std::string {
+ return vformat(fmt.str, vargs<T...>{{args...}});
}
+/**
+ * Converts `value` to `std::string` using the default format for type `T`.
+ *
+ * **Example**:
+ *
+ * std::string answer = fmt::to_string(42);
+ */
+template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+FMT_NODISCARD auto to_string(T value) -> std::string {
+ // The buffer should be large enough to store the number including the sign
+ // or "false" for bool.
+ char buffer[max_of(detail::digits10<T>() + 2, 5)];
+ return {buffer, detail::write<char>(buffer, value)};
+}
+
+template <typename T, FMT_ENABLE_IF(detail::use_format_as<T>::value)>
+FMT_NODISCARD auto to_string(const T& value) -> std::string {
+ return to_string(format_as(value));
+}
+
+template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value &&
+ !detail::use_format_as<T>::value)>
+FMT_NODISCARD auto to_string(const T& value) -> std::string {
+ auto buffer = memory_buffer();
+ detail::write<char>(appender(buffer), value);
+ return {buffer.data(), buffer.size()};
+}
+
+FMT_END_EXPORT
FMT_END_NAMESPACE
#ifdef FMT_HEADER_ONLY
# define FMT_FUNC inline
# include "format-inl.h"
-#else
-# define FMT_FUNC
+#endif
+
+// Restore _LIBCPP_REMOVE_TRANSITIVE_INCLUDES.
+#ifdef FMT_REMOVE_TRANSITIVE_INCLUDES
+# undef _LIBCPP_REMOVE_TRANSITIVE_INCLUDES
#endif
#endif // FMT_FORMAT_H_
#ifndef FMT_OSTREAM_H_
#define FMT_OSTREAM_H_
-#include <fstream> // std::filebuf
+#ifndef FMT_MODULE
+# include <fstream> // std::filebuf
+#endif
#ifdef _WIN32
# ifdef __GLIBCXX__
# include <io.h>
#endif
-#include "format.h"
+#include "chrono.h" // formatbuf
+
+#ifdef _MSVC_STL_UPDATE
+# define FMT_MSVC_STL_UPDATE _MSVC_STL_UPDATE
+#elif defined(_MSC_VER) && _MSC_VER < 1912 // VS 15.5
+# define FMT_MSVC_STL_UPDATE _MSVC_LANG
+#else
+# define FMT_MSVC_STL_UPDATE 0
+#endif
FMT_BEGIN_NAMESPACE
namespace detail {
-template <typename Streambuf> class formatbuf : public Streambuf {
- private:
- using char_type = typename Streambuf::char_type;
- using streamsize = decltype(std::declval<Streambuf>().sputn(nullptr, 0));
- using int_type = typename Streambuf::int_type;
- using traits_type = typename Streambuf::traits_type;
-
- buffer<char_type>& buffer_;
-
- public:
- explicit formatbuf(buffer<char_type>& buf) : buffer_(buf) {}
-
- protected:
- // The put area is always empty. This makes the implementation simpler and has
- // the advantage that the streambuf and the buffer are always in sync and
- // sputc never writes into uninitialized memory. A disadvantage is that each
- // call to sputc always results in a (virtual) call to overflow. There is no
- // disadvantage here for sputn since this always results in a call to xsputn.
-
- auto overflow(int_type ch) -> int_type override {
- if (!traits_type::eq_int_type(ch, traits_type::eof()))
- buffer_.push_back(static_cast<char_type>(ch));
- return ch;
- }
-
- auto xsputn(const char_type* s, streamsize count) -> streamsize override {
- buffer_.append(s, s + count);
- return count;
- }
-};
-
// Generate a unique explicit instantion in every translation unit using a tag
// type in an anonymous namespace.
namespace {
friend auto get_file(BufType& obj) -> FILE* { return obj.*FileMemberPtr; }
};
-#if FMT_MSC_VERSION
+#if FMT_MSVC_STL_UPDATE
template class file_access<file_access_tag, std::filebuf,
&std::filebuf::_Myfile>;
auto get_file(std::filebuf&) -> FILE*;
#endif
-inline auto write_ostream_unicode(std::ostream& os, fmt::string_view data)
- -> bool {
- FILE* f = nullptr;
-#if FMT_MSC_VERSION
- if (auto* buf = dynamic_cast<std::filebuf*>(os.rdbuf()))
- f = get_file(*buf);
- else
- return false;
-#elif defined(_WIN32) && defined(__GLIBCXX__)
- auto* rdbuf = os.rdbuf();
- if (auto* sfbuf = dynamic_cast<__gnu_cxx::stdio_sync_filebuf<char>*>(rdbuf))
- f = sfbuf->file();
- else if (auto* fbuf = dynamic_cast<__gnu_cxx::stdio_filebuf<char>*>(rdbuf))
- f = fbuf->file();
- else
- return false;
-#else
- ignore_unused(os, data, f);
-#endif
-#ifdef _WIN32
- if (f) {
- int fd = _fileno(f);
- if (_isatty(fd)) {
- os.flush();
- return write_console(fd, data);
- }
- }
-#endif
- return false;
-}
-inline auto write_ostream_unicode(std::wostream&,
- fmt::basic_string_view<wchar_t>) -> bool {
- return false;
-}
-
// Write the content of buf to os.
// It is a separate function rather than a part of vprint to simplify testing.
template <typename Char>
void write_buffer(std::basic_ostream<Char>& os, buffer<Char>& buf) {
const Char* buf_data = buf.data();
- using unsigned_streamsize = std::make_unsigned<std::streamsize>::type;
+ using unsigned_streamsize = make_unsigned_t<std::streamsize>;
unsigned_streamsize size = buf.size();
unsigned_streamsize max_size = to_unsigned(max_value<std::streamsize>());
do {
} while (size != 0);
}
-template <typename Char, typename T>
-void format_value(buffer<Char>& buf, const T& value) {
- auto&& format_buf = formatbuf<std::basic_streambuf<Char>>(buf);
- auto&& output = std::basic_ostream<Char>(&format_buf);
-#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)
- output.imbue(std::locale::classic()); // The default is always unlocalized.
-#endif
- output << value;
- output.exceptions(std::ios_base::failbit | std::ios_base::badbit);
-}
-
template <typename T> struct streamed_view {
const T& value;
};
-
} // namespace detail
// Formats an object of type T that has an overloaded ostream operator<<.
struct basic_ostream_formatter : formatter<basic_string_view<Char>, Char> {
void set_debug_format() = delete;
- template <typename T, typename OutputIt>
- auto format(const T& value, basic_format_context<OutputIt, Char>& ctx) const
- -> OutputIt {
+ template <typename T, typename Context>
+ auto format(const T& value, Context& ctx) const -> decltype(ctx.out()) {
auto buffer = basic_memory_buffer<Char>();
- detail::format_value(buffer, value);
+ auto&& formatbuf = detail::formatbuf<std::basic_streambuf<Char>>(buffer);
+ auto&& output = std::basic_ostream<Char>(&formatbuf);
+ output.imbue(std::locale::classic()); // The default is always unlocalized.
+ output << value;
+ output.exceptions(std::ios_base::failbit | std::ios_base::badbit);
return formatter<basic_string_view<Char>, Char>::format(
{buffer.data(), buffer.size()}, ctx);
}
template <typename T, typename Char>
struct formatter<detail::streamed_view<T>, Char>
: basic_ostream_formatter<Char> {
- template <typename OutputIt>
- auto format(detail::streamed_view<T> view,
- basic_format_context<OutputIt, Char>& ctx) const -> OutputIt {
+ template <typename Context>
+ auto format(detail::streamed_view<T> view, Context& ctx) const
+ -> decltype(ctx.out()) {
return basic_ostream_formatter<Char>::format(view.value, ctx);
}
};
/**
- \rst
- Returns a view that formats `value` via an ostream ``operator<<``.
-
- **Example**::
-
- fmt::print("Current thread id: {}\n",
- fmt::streamed(std::this_thread::get_id()));
- \endrst
+ * Returns a view that formats `value` via an ostream `operator<<`.
+ *
+ * **Example**:
+ *
+ * fmt::print("Current thread id: {}\n",
+ * fmt::streamed(std::this_thread::get_id()));
*/
template <typename T>
constexpr auto streamed(const T& value) -> detail::streamed_view<T> {
return {value};
}
-namespace detail {
-
-inline void vprint_directly(std::ostream& os, string_view format_str,
- format_args args) {
+inline void vprint(std::ostream& os, string_view fmt, format_args args) {
auto buffer = memory_buffer();
- detail::vformat_to(buffer, format_str, args);
- detail::write_buffer(os, buffer);
-}
-
-} // namespace detail
-
-FMT_EXPORT template <typename Char>
-void vprint(std::basic_ostream<Char>& os,
- basic_string_view<type_identity_t<Char>> format_str,
- basic_format_args<buffer_context<type_identity_t<Char>>> args) {
- auto buffer = basic_memory_buffer<Char>();
- detail::vformat_to(buffer, format_str, args);
- if (detail::write_ostream_unicode(os, {buffer.data(), buffer.size()})) return;
+ detail::vformat_to(buffer, fmt, args);
+ FILE* f = nullptr;
+#if FMT_MSVC_STL_UPDATE && FMT_USE_RTTI
+ if (auto* buf = dynamic_cast<std::filebuf*>(os.rdbuf()))
+ f = detail::get_file(*buf);
+#elif defined(_WIN32) && defined(__GLIBCXX__) && FMT_USE_RTTI
+ auto* rdbuf = os.rdbuf();
+ if (auto* sfbuf = dynamic_cast<__gnu_cxx::stdio_sync_filebuf<char>*>(rdbuf))
+ f = sfbuf->file();
+ else if (auto* fbuf = dynamic_cast<__gnu_cxx::stdio_filebuf<char>*>(rdbuf))
+ f = fbuf->file();
+#endif
+#ifdef _WIN32
+ if (f) {
+ int fd = _fileno(f);
+ if (_isatty(fd)) {
+ os.flush();
+ if (detail::write_console(fd, {buffer.data(), buffer.size()})) return;
+ }
+ }
+#endif
+ detail::ignore_unused(f);
detail::write_buffer(os, buffer);
}
/**
- \rst
- Prints formatted data to the stream *os*.
-
- **Example**::
-
- fmt::print(cerr, "Don't {}!", "panic");
- \endrst
+ * Prints formatted data to the stream `os`.
+ *
+ * **Example**:
+ *
+ * fmt::print(cerr, "Don't {}!", "panic");
*/
FMT_EXPORT template <typename... T>
void print(std::ostream& os, format_string<T...> fmt, T&&... args) {
- const auto& vargs = fmt::make_format_args(args...);
- if (detail::is_utf8())
- vprint(os, fmt, vargs);
- else
- detail::vprint_directly(os, fmt, vargs);
-}
-
-FMT_EXPORT
-template <typename... Args>
-void print(std::wostream& os,
- basic_format_string<wchar_t, type_identity_t<Args>...> fmt,
- Args&&... args) {
- vprint(os, fmt, fmt::make_format_args<buffer_context<wchar_t>>(args...));
+ fmt::vargs<T...> vargs = {{args...}};
+ if (detail::const_check(detail::use_utf8)) return vprint(os, fmt.str, vargs);
+ auto buffer = memory_buffer();
+ detail::vformat_to(buffer, fmt.str, vargs);
+ detail::write_buffer(os, buffer);
}
FMT_EXPORT template <typename... T>
fmt::print(os, "{}\n", fmt::format(fmt, std::forward<T>(args)...));
}
-FMT_EXPORT
-template <typename... Args>
-void println(std::wostream& os,
- basic_format_string<wchar_t, type_identity_t<Args>...> fmt,
- Args&&... args) {
- print(os, L"{}\n", fmt::format(fmt, std::forward<Args>(args)...));
-}
-
FMT_END_NAMESPACE
#endif // FMT_OSTREAM_H_
#ifndef FMT_STD_H_
#define FMT_STD_H_
-#include <atomic>
-#include <bitset>
-#include <cstdlib>
-#include <exception>
-#include <memory>
-#include <thread>
-#include <type_traits>
-#include <typeinfo>
-#include <utility>
-#include <vector>
-
#include "format.h"
#include "ostream.h"
-#if FMT_HAS_INCLUDE(<version>)
-# include <version>
-#endif
-// Checking FMT_CPLUSPLUS for warning suppression in MSVC.
-#if FMT_CPLUSPLUS >= 201703L
-# if FMT_HAS_INCLUDE(<filesystem>)
-# include <filesystem>
+#ifndef FMT_MODULE
+# include <atomic>
+# include <bitset>
+# include <complex>
+# include <cstdlib>
+# include <exception>
+# include <functional>
+# include <memory>
+# include <thread>
+# include <type_traits>
+# include <typeinfo>
+# include <utility>
+# include <vector>
+
+// Check FMT_CPLUSPLUS to suppress a bogus warning in MSVC.
+# if FMT_CPLUSPLUS >= 201703L
+# if FMT_HAS_INCLUDE(<filesystem>) && \
+ (!defined(FMT_CPP_LIB_FILESYSTEM) || FMT_CPP_LIB_FILESYSTEM != 0)
+# include <filesystem>
+# endif
+# if FMT_HAS_INCLUDE(<variant>)
+# include <variant>
+# endif
+# if FMT_HAS_INCLUDE(<optional>)
+# include <optional>
+# endif
# endif
-# if FMT_HAS_INCLUDE(<variant>)
-# include <variant>
+// Use > instead of >= in the version check because <source_location> may be
+// available after C++17 but before C++20 is marked as implemented.
+# if FMT_CPLUSPLUS > 201703L && FMT_HAS_INCLUDE(<source_location>)
+# include <source_location>
# endif
-# if FMT_HAS_INCLUDE(<optional>)
-# include <optional>
+# if FMT_CPLUSPLUS > 202002L && FMT_HAS_INCLUDE(<expected>)
+# include <expected>
# endif
-#endif
+#endif // FMT_MODULE
-#if FMT_CPLUSPLUS > 201703L && FMT_HAS_INCLUDE(<source_location>)
-# include <source_location>
+#if FMT_HAS_INCLUDE(<version>)
+# include <version>
#endif
// GCC 4 does not support FMT_HAS_INCLUDE.
# endif
#endif
-// Check if typeid is available.
-#ifndef FMT_USE_TYPEID
-// __RTTI is for EDG compilers. In MSVC typeid is available without RTTI.
-# if defined(__GXX_RTTI) || FMT_HAS_FEATURE(cxx_rtti) || FMT_MSC_VERSION || \
- defined(__INTEL_RTTI__) || defined(__RTTI)
-# define FMT_USE_TYPEID 1
-# else
-# define FMT_USE_TYPEID 0
-# endif
-#endif
-
// For older Xcode versions, __cpp_lib_xxx flags are inaccurately defined.
#ifndef FMT_CPP_LIB_FILESYSTEM
# ifdef __cpp_lib_filesystem
FMT_EXPORT
template <typename Char> struct formatter<std::filesystem::path, Char> {
private:
- format_specs<Char> specs_;
+ format_specs specs_;
detail::arg_ref<Char> width_ref_;
bool debug_ = false;
char path_type_ = 0;
public:
FMT_CONSTEXPR void set_debug_format(bool set = true) { debug_ = set; }
- template <typename ParseContext> FMT_CONSTEXPR auto parse(ParseContext& ctx) {
+ FMT_CONSTEXPR auto parse(parse_context<Char>& ctx) {
auto it = ctx.begin(), end = ctx.end();
if (it == end) return it;
it = detail::parse_align(it, end, specs_);
if (it == end) return it;
- it = detail::parse_dynamic_spec(it, end, specs_.width, width_ref_, ctx);
+ Char c = *it;
+ if ((c >= '0' && c <= '9') || c == '{')
+ it = detail::parse_width(it, end, specs_, width_ref_, ctx);
if (it != end && *it == '?') {
debug_ = true;
++it;
}
- if (it != end && (*it == 'g')) path_type_ = *it++;
+ if (it != end && (*it == 'g')) path_type_ = detail::to_ascii(*it++);
return it;
}
template <typename FormatContext>
auto format(const std::filesystem::path& p, FormatContext& ctx) const {
auto specs = specs_;
-# ifdef _WIN32
- auto path_string = !path_type_ ? p.native() : p.generic_wstring();
-# else
- auto path_string = !path_type_ ? p.native() : p.generic_string();
-# endif
+ auto path_string =
+ !path_type_ ? p.native()
+ : p.generic_string<std::filesystem::path::value_type>();
- detail::handle_dynamic_spec<detail::width_checker>(specs.width, width_ref_,
- ctx);
+ detail::handle_dynamic_spec(specs.dynamic_width(), specs.width, width_ref_,
+ ctx);
if (!debug_) {
auto s = detail::get_path_string<Char>(p, path_string);
return detail::write(ctx.out(), basic_string_view<Char>(s), specs);
specs);
}
};
+
+class path : public std::filesystem::path {
+ public:
+ auto display_string() const -> std::string {
+ const std::filesystem::path& base = *this;
+ return fmt::format(FMT_STRING("{}"), base);
+ }
+ auto system_string() const -> std::string { return string(); }
+
+ auto generic_display_string() const -> std::string {
+ const std::filesystem::path& base = *this;
+ return fmt::format(FMT_STRING("{:g}"), base);
+ }
+ auto generic_system_string() const -> std::string { return generic_string(); }
+};
+
FMT_END_NAMESPACE
#endif // FMT_CPP_LIB_FILESYSTEM
FMT_BEGIN_NAMESPACE
FMT_EXPORT
template <std::size_t N, typename Char>
-struct formatter<std::bitset<N>, Char> : nested_formatter<string_view> {
+struct formatter<std::bitset<N>, Char>
+ : nested_formatter<basic_string_view<Char>, Char> {
private:
// Functor because C++11 doesn't support generic lambdas.
struct writer {
template <typename FormatContext>
auto format(const std::bitset<N>& bs, FormatContext& ctx) const
-> decltype(ctx.out()) {
- return write_padded(ctx, writer{bs});
+ return this->write_padded(ctx, writer{bs});
}
};
FMT_CONSTEXPR static void maybe_set_debug_format(U&, ...) {}
public:
- template <typename ParseContext> FMT_CONSTEXPR auto parse(ParseContext& ctx) {
+ FMT_CONSTEXPR auto parse(parse_context<Char>& ctx) {
maybe_set_debug_format(underlying_, true);
return underlying_.parse(ctx);
}
FMT_END_NAMESPACE
#endif // __cpp_lib_optional
-#ifdef __cpp_lib_source_location
+#if defined(__cpp_lib_expected) || FMT_CPP_LIB_VARIANT
+
+FMT_BEGIN_NAMESPACE
+namespace detail {
+
+template <typename Char, typename OutputIt, typename T>
+auto write_escaped_alternative(OutputIt out, const T& v) -> OutputIt {
+ if constexpr (has_to_string_view<T>::value)
+ return write_escaped_string<Char>(out, detail::to_string_view(v));
+ if constexpr (std::is_same_v<T, Char>) return write_escaped_char(out, v);
+ return write<Char>(out, v);
+}
+
+} // namespace detail
+
+FMT_END_NAMESPACE
+#endif
+
+#ifdef __cpp_lib_expected
FMT_BEGIN_NAMESPACE
+
FMT_EXPORT
-template <> struct formatter<std::source_location> {
- template <typename ParseContext> FMT_CONSTEXPR auto parse(ParseContext& ctx) {
+template <typename T, typename E, typename Char>
+struct formatter<std::expected<T, E>, Char,
+ std::enable_if_t<(std::is_void<T>::value ||
+ is_formattable<T, Char>::value) &&
+ is_formattable<E, Char>::value>> {
+ FMT_CONSTEXPR auto parse(parse_context<Char>& ctx) -> const Char* {
return ctx.begin();
}
+ template <typename FormatContext>
+ auto format(const std::expected<T, E>& value, FormatContext& ctx) const
+ -> decltype(ctx.out()) {
+ auto out = ctx.out();
+
+ if (value.has_value()) {
+ out = detail::write<Char>(out, "expected(");
+ if constexpr (!std::is_void<T>::value)
+ out = detail::write_escaped_alternative<Char>(out, *value);
+ } else {
+ out = detail::write<Char>(out, "unexpected(");
+ out = detail::write_escaped_alternative<Char>(out, value.error());
+ }
+ *out++ = ')';
+ return out;
+ }
+};
+FMT_END_NAMESPACE
+#endif // __cpp_lib_expected
+
+#ifdef __cpp_lib_source_location
+FMT_BEGIN_NAMESPACE
+FMT_EXPORT
+template <> struct formatter<std::source_location> {
+ FMT_CONSTEXPR auto parse(parse_context<>& ctx) { return ctx.begin(); }
+
template <typename FormatContext>
auto format(const std::source_location& loc, FormatContext& ctx) const
-> decltype(ctx.out()) {
decltype(check(variant_index_sequence<T>{}))::value;
};
-template <typename Char, typename OutputIt, typename T>
-auto write_variant_alternative(OutputIt out, const T& v) -> OutputIt {
- if constexpr (is_string<T>::value)
- return write_escaped_string<Char>(out, detail::to_string_view(v));
- else if constexpr (std::is_same_v<T, Char>)
- return write_escaped_char(out, v);
- else
- return write<Char>(out, v);
-}
-
} // namespace detail
template <typename T> struct is_variant_like {
FMT_EXPORT
template <typename Char> struct formatter<std::monostate, Char> {
- template <typename ParseContext>
- FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+ FMT_CONSTEXPR auto parse(parse_context<Char>& ctx) -> const Char* {
return ctx.begin();
}
Variant, Char,
std::enable_if_t<std::conjunction_v<
is_variant_like<Variant>, is_variant_formattable<Variant, Char>>>> {
- template <typename ParseContext>
- FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+ FMT_CONSTEXPR auto parse(parse_context<Char>& ctx) -> const Char* {
return ctx.begin();
}
FMT_TRY {
std::visit(
[&](const auto& v) {
- out = detail::write_variant_alternative<Char>(out, v);
+ out = detail::write_escaped_alternative<Char>(out, v);
},
value);
}
FMT_BEGIN_NAMESPACE
FMT_EXPORT
-template <typename Char> struct formatter<std::error_code, Char> {
- template <typename ParseContext>
- FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
- return ctx.begin();
+template <> struct formatter<std::error_code> {
+ private:
+ format_specs specs_;
+ detail::arg_ref<char> width_ref_;
+
+ public:
+ FMT_CONSTEXPR auto parse(parse_context<>& ctx) -> const char* {
+ auto it = ctx.begin(), end = ctx.end();
+ if (it == end) return it;
+
+ it = detail::parse_align(it, end, specs_);
+ if (it == end) return it;
+
+ char c = *it;
+ if ((c >= '0' && c <= '9') || c == '{')
+ it = detail::parse_width(it, end, specs_, width_ref_, ctx);
+ return it;
}
template <typename FormatContext>
- FMT_CONSTEXPR auto format(const std::error_code& ec, FormatContext& ctx) const
+ FMT_CONSTEXPR20 auto format(const std::error_code& ec,
+ FormatContext& ctx) const -> decltype(ctx.out()) {
+ auto specs = specs_;
+ detail::handle_dynamic_spec(specs.dynamic_width(), specs.width, width_ref_,
+ ctx);
+ memory_buffer buf;
+ buf.append(string_view(ec.category().name()));
+ buf.push_back(':');
+ detail::write<char>(appender(buf), ec.value());
+ return detail::write<char>(ctx.out(), string_view(buf.data(), buf.size()),
+ specs);
+ }
+};
+
+#if FMT_USE_RTTI
+namespace detail {
+
+template <typename Char, typename OutputIt>
+auto write_demangled_name(OutputIt out, const std::type_info& ti) -> OutputIt {
+# ifdef FMT_HAS_ABI_CXA_DEMANGLE
+ int status = 0;
+ std::size_t size = 0;
+ std::unique_ptr<char, void (*)(void*)> demangled_name_ptr(
+ abi::__cxa_demangle(ti.name(), nullptr, &size, &status), &std::free);
+
+ string_view demangled_name_view;
+ if (demangled_name_ptr) {
+ demangled_name_view = demangled_name_ptr.get();
+
+ // Normalization of stdlib inline namespace names.
+ // libc++ inline namespaces.
+ // std::__1::* -> std::*
+ // std::__1::__fs::* -> std::*
+ // libstdc++ inline namespaces.
+ // std::__cxx11::* -> std::*
+ // std::filesystem::__cxx11::* -> std::filesystem::*
+ if (demangled_name_view.starts_with("std::")) {
+ char* begin = demangled_name_ptr.get();
+ char* to = begin + 5; // std::
+ for (char *from = to, *end = begin + demangled_name_view.size();
+ from < end;) {
+ // This is safe, because demangled_name is NUL-terminated.
+ if (from[0] == '_' && from[1] == '_') {
+ char* next = from + 1;
+ while (next < end && *next != ':') next++;
+ if (next[0] == ':' && next[1] == ':') {
+ from = next + 2;
+ continue;
+ }
+ }
+ *to++ = *from++;
+ }
+ demangled_name_view = {begin, detail::to_unsigned(to - begin)};
+ }
+ } else {
+ demangled_name_view = string_view(ti.name());
+ }
+ return detail::write_bytes<Char>(out, demangled_name_view);
+# elif FMT_MSC_VERSION
+ const string_view demangled_name(ti.name());
+ for (std::size_t i = 0; i < demangled_name.size(); ++i) {
+ auto sub = demangled_name;
+ sub.remove_prefix(i);
+ if (sub.starts_with("enum ")) {
+ i += 4;
+ continue;
+ }
+ if (sub.starts_with("class ") || sub.starts_with("union ")) {
+ i += 5;
+ continue;
+ }
+ if (sub.starts_with("struct ")) {
+ i += 6;
+ continue;
+ }
+ if (*sub.begin() != ' ') *out++ = *sub.begin();
+ }
+ return out;
+# else
+ return detail::write_bytes<Char>(out, string_view(ti.name()));
+# endif
+}
+
+} // namespace detail
+
+FMT_EXPORT
+template <typename Char>
+struct formatter<std::type_info, Char // DEPRECATED! Mixing code unit types.
+ > {
+ public:
+ FMT_CONSTEXPR auto parse(parse_context<Char>& ctx) -> const Char* {
+ return ctx.begin();
+ }
+
+ template <typename Context>
+ auto format(const std::type_info& ti, Context& ctx) const
-> decltype(ctx.out()) {
- auto out = ctx.out();
- out = detail::write_bytes(out, ec.category().name(), format_specs<Char>());
- out = detail::write<Char>(out, Char(':'));
- out = detail::write<Char>(out, ec.value());
- return out;
+ return detail::write_demangled_name<Char>(ctx.out(), ti);
}
};
+#endif
FMT_EXPORT
template <typename T, typename Char>
bool with_typename_ = false;
public:
- FMT_CONSTEXPR auto parse(basic_format_parse_context<Char>& ctx)
- -> decltype(ctx.begin()) {
+ FMT_CONSTEXPR auto parse(parse_context<Char>& ctx) -> const Char* {
auto it = ctx.begin();
auto end = ctx.end();
if (it == end || *it == '}') return it;
if (*it == 't') {
++it;
- with_typename_ = FMT_USE_TYPEID != 0;
+ with_typename_ = FMT_USE_RTTI != 0;
}
return it;
}
- template <typename OutputIt>
- auto format(const std::exception& ex,
- basic_format_context<OutputIt, Char>& ctx) const -> OutputIt {
- format_specs<Char> spec;
+ template <typename Context>
+ auto format(const std::exception& ex, Context& ctx) const
+ -> decltype(ctx.out()) {
auto out = ctx.out();
- if (!with_typename_)
- return detail::write_bytes(out, string_view(ex.what()), spec);
-
-#if FMT_USE_TYPEID
- const std::type_info& ti = typeid(ex);
-# ifdef FMT_HAS_ABI_CXA_DEMANGLE
- int status = 0;
- std::size_t size = 0;
- std::unique_ptr<char, void (*)(void*)> demangled_name_ptr(
- abi::__cxa_demangle(ti.name(), nullptr, &size, &status), &std::free);
-
- string_view demangled_name_view;
- if (demangled_name_ptr) {
- demangled_name_view = demangled_name_ptr.get();
-
- // Normalization of stdlib inline namespace names.
- // libc++ inline namespaces.
- // std::__1::* -> std::*
- // std::__1::__fs::* -> std::*
- // libstdc++ inline namespaces.
- // std::__cxx11::* -> std::*
- // std::filesystem::__cxx11::* -> std::filesystem::*
- if (demangled_name_view.starts_with("std::")) {
- char* begin = demangled_name_ptr.get();
- char* to = begin + 5; // std::
- for (char *from = to, *end = begin + demangled_name_view.size();
- from < end;) {
- // This is safe, because demangled_name is NUL-terminated.
- if (from[0] == '_' && from[1] == '_') {
- char* next = from + 1;
- while (next < end && *next != ':') next++;
- if (next[0] == ':' && next[1] == ':') {
- from = next + 2;
- continue;
- }
- }
- *to++ = *from++;
- }
- demangled_name_view = {begin, detail::to_unsigned(to - begin)};
- }
- } else {
- demangled_name_view = string_view(ti.name());
+#if FMT_USE_RTTI
+ if (with_typename_) {
+ out = detail::write_demangled_name<Char>(out, typeid(ex));
+ *out++ = ':';
+ *out++ = ' ';
}
- out = detail::write_bytes(out, demangled_name_view, spec);
-# elif FMT_MSC_VERSION
- string_view demangled_name_view(ti.name());
- if (demangled_name_view.starts_with("class "))
- demangled_name_view.remove_prefix(6);
- else if (demangled_name_view.starts_with("struct "))
- demangled_name_view.remove_prefix(7);
- out = detail::write_bytes(out, demangled_name_view, spec);
-# else
- out = detail::write_bytes(out, string_view(ti.name()), spec);
-# endif
- *out++ = ':';
- *out++ = ' ';
- return detail::write_bytes(out, string_view(ex.what()), spec);
#endif
+ return detail::write_bytes<Char>(out, string_view(ex.what()));
}
};
}
};
+template <typename T, typename Deleter>
+auto ptr(const std::unique_ptr<T, Deleter>& p) -> const void* {
+ return p.get();
+}
+template <typename T> auto ptr(const std::shared_ptr<T>& p) -> const void* {
+ return p.get();
+}
+
FMT_EXPORT
template <typename T, typename Char>
struct formatter<std::atomic<T>, Char,
};
#endif // __cpp_lib_atomic_flag_test
+FMT_EXPORT
+template <typename T, typename Char> struct formatter<std::complex<T>, Char> {
+ private:
+ detail::dynamic_format_specs<Char> specs_;
+
+ template <typename FormatContext, typename OutputIt>
+ FMT_CONSTEXPR auto do_format(const std::complex<T>& c,
+ detail::dynamic_format_specs<Char>& specs,
+ FormatContext& ctx, OutputIt out) const
+ -> OutputIt {
+ if (c.real() != 0) {
+ *out++ = Char('(');
+ out = detail::write<Char>(out, c.real(), specs, ctx.locale());
+ specs.set_sign(sign::plus);
+ out = detail::write<Char>(out, c.imag(), specs, ctx.locale());
+ if (!detail::isfinite(c.imag())) *out++ = Char(' ');
+ *out++ = Char('i');
+ *out++ = Char(')');
+ return out;
+ }
+ out = detail::write<Char>(out, c.imag(), specs, ctx.locale());
+ if (!detail::isfinite(c.imag())) *out++ = Char(' ');
+ *out++ = Char('i');
+ return out;
+ }
+
+ public:
+ FMT_CONSTEXPR auto parse(parse_context<Char>& ctx) -> const Char* {
+ if (ctx.begin() == ctx.end() || *ctx.begin() == '}') return ctx.begin();
+ return parse_format_specs(ctx.begin(), ctx.end(), specs_, ctx,
+ detail::type_constant<T, Char>::value);
+ }
+
+ template <typename FormatContext>
+ auto format(const std::complex<T>& c, FormatContext& ctx) const
+ -> decltype(ctx.out()) {
+ auto specs = specs_;
+ if (specs.dynamic()) {
+ detail::handle_dynamic_spec(specs.dynamic_width(), specs.width,
+ specs.width_ref, ctx);
+ detail::handle_dynamic_spec(specs.dynamic_precision(), specs.precision,
+ specs.precision_ref, ctx);
+ }
+
+ if (specs.width == 0) return do_format(c, specs, ctx, ctx.out());
+ auto buf = basic_memory_buffer<Char>();
+
+ auto outer_specs = format_specs();
+ outer_specs.width = specs.width;
+ outer_specs.copy_fill_from(specs);
+ outer_specs.set_align(specs.align());
+
+ specs.width = 0;
+ specs.set_fill({});
+ specs.set_align(align::none);
+
+ do_format(c, specs, ctx, basic_appender<Char>(buf));
+ return detail::write<Char>(ctx.out(),
+ basic_string_view<Char>(buf.data(), buf.size()),
+ outer_specs);
+ }
+};
+
+FMT_EXPORT
+template <typename T, typename Char>
+struct formatter<std::reference_wrapper<T>, Char,
+ enable_if_t<is_formattable<remove_cvref_t<T>, Char>::value>>
+ : formatter<remove_cvref_t<T>, Char> {
+ template <typename FormatContext>
+ auto format(std::reference_wrapper<T> ref, FormatContext& ctx) const
+ -> decltype(ctx.out()) {
+ return formatter<remove_cvref_t<T>, Char>::format(ref.get(), ctx);
+ }
+};
+
FMT_END_NAMESPACE
#endif // FMT_STD_H_
projects / thirdparty / ccache.git / commitdiff
