#include <type_traits>
// The fmt library version in the form major * 10000 + minor * 100 + patch.
-#define FMT_VERSION 50300
+#define FMT_VERSION 60000
#ifdef __has_feature
-# define FMT_HAS_FEATURE(x) __has_feature(x)
+# define FMT_HAS_FEATURE(x) __has_feature(x)
#else
-# define FMT_HAS_FEATURE(x) 0
+# define FMT_HAS_FEATURE(x) 0
#endif
#if defined(__has_include) && !defined(__INTELLISENSE__) && \
!(defined(__INTEL_COMPILER) && __INTEL_COMPILER < 1600)
-# define FMT_HAS_INCLUDE(x) __has_include(x)
+# define FMT_HAS_INCLUDE(x) __has_include(x)
#else
-# define FMT_HAS_INCLUDE(x) 0
+# define FMT_HAS_INCLUDE(x) 0
#endif
#ifdef __has_cpp_attribute
-# define FMT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
+# define FMT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
#else
-# define FMT_HAS_CPP_ATTRIBUTE(x) 0
+# define FMT_HAS_CPP_ATTRIBUTE(x) 0
#endif
#if defined(__GNUC__) && !defined(__clang__)
-# define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
+# define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
#else
-# define FMT_GCC_VERSION 0
+# define FMT_GCC_VERSION 0
#endif
#if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__)
-# define FMT_HAS_GXX_CXX11 FMT_GCC_VERSION
+# define FMT_HAS_GXX_CXX11 FMT_GCC_VERSION
#else
-# define FMT_HAS_GXX_CXX11 0
+# define FMT_HAS_GXX_CXX11 0
#endif
#ifdef _MSC_VER
-# define FMT_MSC_VER _MSC_VER
+# define FMT_MSC_VER _MSC_VER
#else
-# define FMT_MSC_VER 0
+# define FMT_MSC_VER 0
#endif
// Check if relaxed C++14 constexpr is supported.
// GCC doesn't allow throw in constexpr until version 6 (bug 67371).
#ifndef FMT_USE_CONSTEXPR
-# define FMT_USE_CONSTEXPR \
- (FMT_HAS_FEATURE(cxx_relaxed_constexpr) || FMT_MSC_VER >= 1910 || \
- (FMT_GCC_VERSION >= 600 && __cplusplus >= 201402L))
+# define FMT_USE_CONSTEXPR \
+ (FMT_HAS_FEATURE(cxx_relaxed_constexpr) || FMT_MSC_VER >= 1910 || \
+ (FMT_GCC_VERSION >= 600 && __cplusplus >= 201402L))
#endif
#if FMT_USE_CONSTEXPR
-# define FMT_CONSTEXPR constexpr
-# define FMT_CONSTEXPR_DECL constexpr
+# define FMT_CONSTEXPR constexpr
+# define FMT_CONSTEXPR_DECL constexpr
#else
-# define FMT_CONSTEXPR inline
-# define FMT_CONSTEXPR_DECL
-#endif
-
-#ifndef FMT_USE_CONSTEXPR11
-# define FMT_USE_CONSTEXPR11 \
- (FMT_USE_CONSTEXPR || FMT_GCC_VERSION >= 406 || FMT_MSC_VER >= 1900)
-#endif
-#if FMT_USE_CONSTEXPR11
-# define FMT_CONSTEXPR11 constexpr
-#else
-# define FMT_CONSTEXPR11
+# define FMT_CONSTEXPR inline
+# define FMT_CONSTEXPR_DECL
#endif
#ifndef FMT_OVERRIDE
-# if FMT_HAS_FEATURE(cxx_override) || \
- (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1900
-# define FMT_OVERRIDE override
-# else
-# define FMT_OVERRIDE
-# endif
-#endif
-
-#if FMT_HAS_FEATURE(cxx_explicit_conversions) || \
- FMT_GCC_VERSION >= 405 || FMT_MSC_VER >= 1800
-# define FMT_USE_EXPLICIT 1
-# define FMT_EXPLICIT explicit
-#else
-# define FMT_USE_EXPLICIT 0
-# define FMT_EXPLICIT
-#endif
-
-#ifndef FMT_NULL
-# if FMT_HAS_FEATURE(cxx_nullptr) || \
- (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1600
-# define FMT_NULL nullptr
-# define FMT_USE_NULLPTR 1
-# else
-# define FMT_NULL NULL
-# endif
-#endif
-#ifndef FMT_USE_NULLPTR
-# define FMT_USE_NULLPTR 0
+# if FMT_HAS_FEATURE(cxx_override) || \
+ (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1900
+# define FMT_OVERRIDE override
+# else
+# define FMT_OVERRIDE
+# endif
#endif
// Check if exceptions are disabled.
#ifndef FMT_EXCEPTIONS
-# if (defined(__GNUC__) && !defined(__EXCEPTIONS)) || \
- FMT_MSC_VER && !_HAS_EXCEPTIONS
-# define FMT_EXCEPTIONS 0
-# else
-# define FMT_EXCEPTIONS 1
-# endif
+# if (defined(__GNUC__) && !defined(__EXCEPTIONS)) || \
+ FMT_MSC_VER && !_HAS_EXCEPTIONS
+# define FMT_EXCEPTIONS 0
+# else
+# define FMT_EXCEPTIONS 1
+# endif
#endif
// Define FMT_USE_NOEXCEPT to make fmt use noexcept (C++11 feature).
#ifndef FMT_USE_NOEXCEPT
-# define FMT_USE_NOEXCEPT 0
+# define FMT_USE_NOEXCEPT 0
#endif
#if FMT_USE_NOEXCEPT || FMT_HAS_FEATURE(cxx_noexcept) || \
(FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1900
-# define FMT_DETECTED_NOEXCEPT noexcept
-# define FMT_HAS_CXX11_NOEXCEPT 1
+# define FMT_DETECTED_NOEXCEPT noexcept
+# define FMT_HAS_CXX11_NOEXCEPT 1
#else
-# define FMT_DETECTED_NOEXCEPT throw()
-# define FMT_HAS_CXX11_NOEXCEPT 0
+# define FMT_DETECTED_NOEXCEPT throw()
+# define FMT_HAS_CXX11_NOEXCEPT 0
#endif
#ifndef FMT_NOEXCEPT
-# if FMT_EXCEPTIONS || FMT_HAS_CXX11_NOEXCEPT
-# define FMT_NOEXCEPT FMT_DETECTED_NOEXCEPT
-# else
-# define FMT_NOEXCEPT
-# endif
+# if FMT_EXCEPTIONS || FMT_HAS_CXX11_NOEXCEPT
+# define FMT_NOEXCEPT FMT_DETECTED_NOEXCEPT
+# else
+# define FMT_NOEXCEPT
+# endif
+#endif
+
+// [[noreturn]] is disabled on MSVC because of bogus unreachable code warnings.
+#if FMT_EXCEPTIONS && FMT_HAS_CPP_ATTRIBUTE(noreturn) && !FMT_MSC_VER
+# define FMT_NORETURN [[noreturn]]
+#else
+# define FMT_NORETURN
+#endif
+
+#ifndef FMT_DEPRECATED
+# if (FMT_HAS_CPP_ATTRIBUTE(deprecated) && __cplusplus >= 201402L) || \
+ FMT_MSC_VER >= 1900
+# define FMT_DEPRECATED [[deprecated]]
+# else
+# if defined(__GNUC__) || defined(__clang__)
+# define FMT_DEPRECATED __attribute__((deprecated))
+# elif FMT_MSC_VER
+# define FMT_DEPRECATED __declspec(deprecated)
+# else
+# define FMT_DEPRECATED /* deprecated */
+# endif
+# endif
#endif
#ifndef FMT_BEGIN_NAMESPACE
-# if FMT_HAS_FEATURE(cxx_inline_namespaces) || FMT_GCC_VERSION >= 404 || \
- FMT_MSC_VER >= 1900
-# define FMT_INLINE_NAMESPACE inline namespace
-# define FMT_END_NAMESPACE }}
-# else
-# define FMT_INLINE_NAMESPACE namespace
-# define FMT_END_NAMESPACE } using namespace v5; }
-# endif
-# define FMT_BEGIN_NAMESPACE namespace fmt { FMT_INLINE_NAMESPACE v5 {
+# if FMT_HAS_FEATURE(cxx_inline_namespaces) || FMT_GCC_VERSION >= 404 || \
+ FMT_MSC_VER >= 1900
+# define FMT_INLINE_NAMESPACE inline namespace
+# define FMT_END_NAMESPACE \
+ } \
+ }
+# else
+# define FMT_INLINE_NAMESPACE namespace
+# define FMT_END_NAMESPACE \
+ } \
+ using namespace v6; \
+ }
+# endif
+# define FMT_BEGIN_NAMESPACE \
+ namespace fmt { \
+ FMT_INLINE_NAMESPACE v6 {
#endif
#if !defined(FMT_HEADER_ONLY) && defined(_WIN32)
-# ifdef FMT_EXPORT
-# define FMT_API __declspec(dllexport)
-# elif defined(FMT_SHARED)
-# define FMT_API __declspec(dllimport)
-# endif
+# ifdef FMT_EXPORT
+# define FMT_API __declspec(dllexport)
+# elif defined(FMT_SHARED)
+# define FMT_API __declspec(dllimport)
+# define FMT_EXTERN_TEMPLATE_API FMT_API
+# endif
#endif
#ifndef FMT_API
-# define FMT_API
+# define FMT_API
+#endif
+#ifndef FMT_EXTERN_TEMPLATE_API
+# define FMT_EXTERN_TEMPLATE_API
+#endif
+
+#ifndef FMT_HEADER_ONLY
+# define FMT_EXTERN extern
+#else
+# define FMT_EXTERN
#endif
#ifndef FMT_ASSERT
-# define FMT_ASSERT(condition, message) assert((condition) && message)
+# define FMT_ASSERT(condition, message) assert((condition) && message)
#endif
// libc++ supports string_view in pre-c++17.
-#if (FMT_HAS_INCLUDE(<string_view>) && \
- (__cplusplus > 201402L || defined(_LIBCPP_VERSION))) || \
+#if (FMT_HAS_INCLUDE(<string_view>) && \
+ (__cplusplus > 201402L || defined(_LIBCPP_VERSION))) || \
(defined(_MSVC_LANG) && _MSVC_LANG > 201402L && _MSC_VER >= 1910)
-# include <string_view>
-# define FMT_STRING_VIEW std::basic_string_view
-#elif FMT_HAS_INCLUDE(<experimental/string_view>) && __cplusplus >= 201402L
-# include <experimental/string_view>
-# define FMT_STRING_VIEW std::experimental::basic_string_view
-#endif
-
-// std::result_of is defined in <functional> in gcc 4.4.
-#if FMT_GCC_VERSION && FMT_GCC_VERSION <= 404
-# include <functional>
+# include <string_view>
+# define FMT_USE_STRING_VIEW
+#elif FMT_HAS_INCLUDE("experimental/string_view") && __cplusplus >= 201402L
+# include <experimental/string_view>
+# define FMT_USE_EXPERIMENTAL_STRING_VIEW
#endif
FMT_BEGIN_NAMESPACE
-namespace internal {
-// An implementation of declval for pre-C++11 compilers such as gcc 4.
+// Implementations of enable_if_t and other types for pre-C++14 systems.
+template <bool B, class T = void>
+using enable_if_t = typename std::enable_if<B, T>::type;
+template <bool B, class T, class 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>
-typename std::add_rvalue_reference<T>::type declval() FMT_NOEXCEPT;
+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>
-struct result_of;
+struct monostate {};
-template <typename F, typename... Args>
-struct result_of<F(Args...)> {
- // A workaround for gcc 4.4 that doesn't allow F to be a reference.
- typedef typename std::result_of<
- typename std::remove_reference<F>::type(Args...)>::type type;
-};
+// 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).
+#define FMT_ENABLE_IF(...) enable_if_t<(__VA_ARGS__), int> = 0
+
+namespace internal {
+
+// A workaround for gcc 4.8 to make void_t work in a SFINAE context.
+template <typename... Ts> struct void_t_impl { using type = void; };
+
+#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
// Casts nonnegative integer to unsigned.
template <typename Int>
FMT_ASSERT(value >= 0, "negative value");
return static_cast<typename std::make_unsigned<Int>::type>(value);
}
-
-/** A contiguous memory buffer with an optional growing ability. */
-template <typename T>
-class basic_buffer {
- private:
- basic_buffer(const basic_buffer &) = delete;
- void operator=(const basic_buffer &) = delete;
-
- T *ptr_;
- std::size_t size_;
- std::size_t capacity_;
-
- protected:
- // Don't initialize ptr_ since it is not accessed to save a few cycles.
- basic_buffer(std::size_t sz) FMT_NOEXCEPT: size_(sz), capacity_(sz) {}
-
- basic_buffer(T *p = FMT_NULL, std::size_t sz = 0, std::size_t cap = 0)
- FMT_NOEXCEPT: ptr_(p), size_(sz), capacity_(cap) {}
-
- /** Sets the buffer data and capacity. */
- void set(T *buf_data, std::size_t buf_capacity) FMT_NOEXCEPT {
- ptr_ = buf_data;
- capacity_ = buf_capacity;
- }
-
- /** Increases the buffer capacity to hold at least *capacity* elements. */
- virtual void grow(std::size_t capacity) = 0;
-
- public:
- typedef T value_type;
- typedef const T &const_reference;
-
- virtual ~basic_buffer() {}
-
- T *begin() FMT_NOEXCEPT { return ptr_; }
- T *end() FMT_NOEXCEPT { return ptr_ + size_; }
-
- /** Returns the size of this buffer. */
- std::size_t size() const FMT_NOEXCEPT { return size_; }
-
- /** Returns the capacity of this buffer. */
- std::size_t capacity() const FMT_NOEXCEPT { return capacity_; }
-
- /** Returns a pointer to the buffer data. */
- T *data() FMT_NOEXCEPT { return ptr_; }
-
- /** Returns a pointer to the buffer data. */
- const T *data() const FMT_NOEXCEPT { return ptr_; }
-
- /**
- Resizes the buffer. If T is a POD type new elements may not be initialized.
- */
- void resize(std::size_t new_size) {
- reserve(new_size);
- size_ = new_size;
- }
-
- /** Clears this buffer. */
- void clear() { size_ = 0; }
-
- /** Reserves space to store at least *capacity* elements. */
- void reserve(std::size_t new_capacity) {
- if (new_capacity > capacity_)
- grow(new_capacity);
- }
-
- void push_back(const T &value) {
- 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);
-
- T &operator[](std::size_t index) { return ptr_[index]; }
- const T &operator[](std::size_t index) const { return ptr_[index]; }
-};
-
-typedef basic_buffer<char> buffer;
-typedef basic_buffer<wchar_t> wbuffer;
-
-// A container-backed buffer.
-template <typename Container>
-class container_buffer : public basic_buffer<typename Container::value_type> {
- private:
- Container &container_;
-
- protected:
- void grow(std::size_t capacity) FMT_OVERRIDE {
- container_.resize(capacity);
- this->set(&container_[0], capacity);
- }
-
- public:
- explicit container_buffer(Container &c)
- : basic_buffer<typename Container::value_type>(c.size()), container_(c) {}
-};
-
-// Extracts a reference to the container from back_insert_iterator.
-template <typename Container>
-inline Container &get_container(std::back_insert_iterator<Container> it) {
- typedef std::back_insert_iterator<Container> bi_iterator;
- struct accessor: bi_iterator {
- accessor(bi_iterator iter) : bi_iterator(iter) {}
- using bi_iterator::container;
- };
- return *accessor(it).container;
-}
-
-struct error_handler {
- FMT_CONSTEXPR error_handler() {}
- FMT_CONSTEXPR error_handler(const error_handler &) {}
-
- // This function is intentionally not constexpr to give a compile-time error.
- FMT_API void on_error(const char *message);
-};
-
-template <typename T>
-struct no_formatter_error : std::false_type {};
} // namespace internal
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 405
-template <typename... T>
-struct is_constructible: std::false_type {};
-#else
-template <typename... T>
-struct is_constructible : std::is_constructible<T...> {};
-#endif
+template <typename... Ts>
+using void_t = typename internal::void_t_impl<Ts...>::type;
/**
An implementation of ``std::basic_string_view`` for pre-C++17. It provides a
compiled with a different ``-std`` option than the client code (which is not
recommended).
*/
-template <typename Char>
-class basic_string_view {
+template <typename Char> class basic_string_view {
private:
- const Char *data_;
+ const Char* data_;
size_t size_;
public:
- typedef Char char_type;
- typedef const Char *iterator;
+ using char_type = Char;
+ using iterator = const Char*;
- FMT_CONSTEXPR basic_string_view() FMT_NOEXCEPT : data_(FMT_NULL), size_(0) {}
+ FMT_CONSTEXPR basic_string_view() FMT_NOEXCEPT : data_(nullptr), size_(0) {}
/** Constructs a string reference object from a C string and a size. */
- FMT_CONSTEXPR basic_string_view(const Char *s, size_t count) FMT_NOEXCEPT
- : data_(s), size_(count) {}
+ FMT_CONSTEXPR basic_string_view(const Char* s, size_t count) FMT_NOEXCEPT
+ : data_(s),
+ size_(count) {}
/**
\rst
the size with ``std::char_traits<Char>::length``.
\endrst
*/
- basic_string_view(const Char *s)
- : data_(s), size_(std::char_traits<Char>::length(s)) {}
+ basic_string_view(const Char* s)
+ : data_(s), size_(std::char_traits<Char>::length(s)) {}
/** Constructs a string reference from a ``std::basic_string`` object. */
template <typename Alloc>
- FMT_CONSTEXPR basic_string_view(
- const std::basic_string<Char, Alloc> &s) FMT_NOEXCEPT
- : data_(s.data()), size_(s.size()) {}
+ FMT_CONSTEXPR basic_string_view(const std::basic_string<Char, Alloc>& s)
+ FMT_NOEXCEPT : data_(s.data()),
+ size_(s.size()) {}
-#ifdef FMT_STRING_VIEW
- FMT_CONSTEXPR basic_string_view(FMT_STRING_VIEW<Char> s) FMT_NOEXCEPT
- : data_(s.data()), size_(s.size()) {}
-#endif
+ template <
+ typename S,
+ FMT_ENABLE_IF(std::is_same<S, internal::std_string_view<Char>>::value)>
+ FMT_CONSTEXPR basic_string_view(S s) FMT_NOEXCEPT : data_(s.data()),
+ size_(s.size()) {}
/** Returns a pointer to the string data. */
- FMT_CONSTEXPR const Char *data() const { return data_; }
+ FMT_CONSTEXPR const Char* data() const { return data_; }
/** Returns the string size. */
FMT_CONSTEXPR size_t size() const { return size_; }
}
};
-typedef basic_string_view<char> string_view;
-typedef basic_string_view<wchar_t> wstring_view;
+using string_view = basic_string_view<char>;
+using wstring_view = basic_string_view<wchar_t>;
+
+#ifndef __cpp_char8_t
+// A UTF-8 code unit type.
+enum char8_t : unsigned char {};
+#endif
+
+/** Specifies if ``T`` is a character type. Can be specialized by users. */
+template <typename T> struct is_char : std::false_type {};
+template <> struct is_char<char> : std::true_type {};
+template <> struct is_char<wchar_t> : std::true_type {};
+template <> struct is_char<char8_t> : std::true_type {};
+template <> struct is_char<char16_t> : std::true_type {};
+template <> struct is_char<char32_t> : std::true_type {};
/**
\rst
- The function ``to_string_view`` adapts non-intrusively any kind of string or
- string-like type if the user provides a (possibly templated) overload of
- ``to_string_view`` which takes an instance of the string class
- ``StringType<Char>`` and returns a ``fmt::basic_string_view<Char>``.
- The conversion function must live in the very same namespace as
- ``StringType<Char>`` to be picked up by ADL. Non-templated string types
- like f.e. QString must return a ``basic_string_view`` with a fixed matching
- char type.
+ Returns a string view of `s`. In order to add custom string type support to
+ {fmt} provide an overload of `to_string_view` for it in the same namespace as
+ the type for the argument-dependent lookup to work.
**Example**::
namespace my_ns {
- inline string_view to_string_view(const my_string &s) {
+ inline string_view to_string_view(const my_string& s) {
return {s.data(), s.length()};
}
}
-
std::string message = fmt::format(my_string("The answer is {}"), 42);
\endrst
*/
-template <typename Char>
-inline basic_string_view<Char>
- to_string_view(basic_string_view<Char> s) { return s; }
+template <typename Char, FMT_ENABLE_IF(is_char<Char>::value)>
+inline basic_string_view<Char> to_string_view(const Char* s) {
+ return s;
+}
-template <typename Char>
-inline basic_string_view<Char>
- to_string_view(const std::basic_string<Char> &s) { return s; }
+template <typename Char, typename Traits, typename Allocator>
+inline basic_string_view<Char> to_string_view(
+ const std::basic_string<Char, Traits, Allocator>& s) {
+ return {s.data(), s.size()};
+}
template <typename Char>
-inline basic_string_view<Char> to_string_view(const Char *s) { return s; }
+inline basic_string_view<Char> to_string_view(basic_string_view<Char> s) {
+ return s;
+}
-#ifdef FMT_STRING_VIEW
-template <typename Char>
-inline basic_string_view<Char>
- to_string_view(FMT_STRING_VIEW<Char> s) { return s; }
-#endif
+template <typename Char,
+ FMT_ENABLE_IF(!std::is_empty<internal::std_string_view<Char>>::value)>
+inline basic_string_view<Char> to_string_view(
+ internal::std_string_view<Char> s) {
+ return s;
+}
// A base class for compile-time strings. It is defined in the fmt namespace to
// make formatting functions visible via ADL, e.g. format(fmt("{}"), 42).
template <typename S>
struct is_compile_string : std::is_base_of<compile_string, S> {};
-template <
- typename S,
- typename Enable = typename std::enable_if<is_compile_string<S>::value>::type>
-FMT_CONSTEXPR basic_string_view<typename S::char_type>
- to_string_view(const S &s) { return s; }
+template <typename S, FMT_ENABLE_IF(is_compile_string<S>::value)>
+constexpr basic_string_view<typename S::char_type> to_string_view(const S& s) {
+ return s;
+}
+
+namespace internal {
+void to_string_view(...);
+using fmt::v6::to_string_view;
-template <typename Context>
-class basic_format_arg;
+// 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.
+template <typename S>
+struct is_string : std::is_class<decltype(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::char_type;
+};
-template <typename Context>
-class basic_format_args;
+struct error_handler {
+ FMT_CONSTEXPR error_handler() {}
+ FMT_CONSTEXPR error_handler(const error_handler&) {}
+
+ // This function is intentionally not constexpr to give a compile-time error.
+ FMT_NORETURN FMT_API void on_error(const char* message);
+};
+} // namespace internal
+
+/** String's character type. */
+template <typename S> using char_t = typename internal::char_t_impl<S>::type;
+
+// Parsing context consisting of a format string range being parsed and an
+// argument counter for automatic indexing.
+template <typename Char, typename ErrorHandler = internal::error_handler>
+class basic_parse_context : private ErrorHandler {
+ private:
+ basic_string_view<Char> format_str_;
+ int next_arg_id_;
+
+ public:
+ using char_type = Char;
+ using iterator = typename basic_string_view<Char>::iterator;
+
+ explicit FMT_CONSTEXPR basic_parse_context(basic_string_view<Char> format_str,
+ ErrorHandler eh = ErrorHandler())
+ : ErrorHandler(eh), format_str_(format_str), next_arg_id_(0) {}
+
+ // Returns an iterator to the beginning of the format string range being
+ // parsed.
+ FMT_CONSTEXPR iterator begin() const FMT_NOEXCEPT {
+ return format_str_.begin();
+ }
+
+ // Returns an iterator past the end of the format string range being parsed.
+ FMT_CONSTEXPR iterator end() const FMT_NOEXCEPT { return format_str_.end(); }
+
+ // Advances the begin iterator to ``it``.
+ FMT_CONSTEXPR void advance_to(iterator it) {
+ format_str_.remove_prefix(internal::to_unsigned(it - begin()));
+ }
+
+ // Returns the next argument index.
+ FMT_CONSTEXPR int next_arg_id() {
+ if (next_arg_id_ >= 0) return next_arg_id_++;
+ on_error("cannot switch from manual to automatic argument indexing");
+ return 0;
+ }
+
+ FMT_CONSTEXPR bool check_arg_id(int) {
+ if (next_arg_id_ > 0) {
+ on_error("cannot switch from automatic to manual argument indexing");
+ return false;
+ }
+ next_arg_id_ = -1;
+ return true;
+ }
+
+ FMT_CONSTEXPR void check_arg_id(basic_string_view<Char>) {}
+
+ FMT_CONSTEXPR void on_error(const char* message) {
+ ErrorHandler::on_error(message);
+ }
+
+ FMT_CONSTEXPR ErrorHandler error_handler() const { return *this; }
+};
+
+using format_parse_context = basic_parse_context<char>;
+using wformat_parse_context = basic_parse_context<wchar_t>;
+
+using parse_context FMT_DEPRECATED = basic_parse_context<char>;
+using wparse_context FMT_DEPRECATED = basic_parse_context<wchar_t>;
+
+template <typename Context> class basic_format_arg;
+template <typename Context> class basic_format_args;
// A formatter for objects of type T.
template <typename T, typename Char = char, typename Enable = void>
struct formatter {
- static_assert(internal::no_formatter_error<T>::value,
- "don't know how to format the type, include fmt/ostream.h if it provides "
- "an operator<< that should be used");
-
- // The following functions are not defined intentionally.
- template <typename ParseContext>
- typename ParseContext::iterator parse(ParseContext &);
- template <typename FormatContext>
- auto format(const T &val, FormatContext &ctx) -> decltype(ctx.out());
+ // A deleted default constructor indicates a disabled formatter.
+ formatter() = delete;
};
template <typename T, typename Char, typename Enable = void>
-struct convert_to_int: std::integral_constant<
- bool, !std::is_arithmetic<T>::value && std::is_convertible<T, int>::value> {};
+struct FMT_DEPRECATED convert_to_int
+ : bool_constant<!std::is_arithmetic<T>::value &&
+ std::is_convertible<T, int>::value> {};
namespace internal {
-struct dummy_string_view { typedef void char_type; };
-dummy_string_view to_string_view(...);
-using fmt::v5::to_string_view;
+// 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>>;
-// Specifies whether S is a string type convertible to fmt::basic_string_view.
-template <typename S>
-struct is_string : std::integral_constant<bool, !std::is_same<
- dummy_string_view, decltype(to_string_view(declval<S>()))>::value> {};
+/** A contiguous memory buffer with an optional growing ability. */
+template <typename T> class buffer {
+ private:
+ buffer(const buffer&) = delete;
+ void operator=(const buffer&) = delete;
-template <typename S>
-struct char_t {
- typedef decltype(to_string_view(declval<S>())) result;
- typedef typename result::char_type type;
+ T* ptr_;
+ std::size_t size_;
+ std::size_t capacity_;
+
+ protected:
+ // Don't initialize ptr_ since it is not accessed to save a few cycles.
+ buffer(std::size_t sz) FMT_NOEXCEPT : size_(sz), capacity_(sz) {}
+
+ buffer(T* p = nullptr, std::size_t sz = 0, std::size_t cap = 0) FMT_NOEXCEPT
+ : ptr_(p),
+ size_(sz),
+ capacity_(cap) {}
+
+ /** Sets the buffer data and capacity. */
+ void set(T* buf_data, std::size_t buf_capacity) FMT_NOEXCEPT {
+ ptr_ = buf_data;
+ capacity_ = buf_capacity;
+ }
+
+ /** Increases the buffer capacity to hold at least *capacity* elements. */
+ virtual void grow(std::size_t capacity) = 0;
+
+ public:
+ using value_type = T;
+ using const_reference = const T&;
+
+ virtual ~buffer() {}
+
+ T* begin() FMT_NOEXCEPT { return ptr_; }
+ T* end() FMT_NOEXCEPT { return ptr_ + size_; }
+
+ /** Returns the size of this buffer. */
+ std::size_t size() const FMT_NOEXCEPT { return size_; }
+
+ /** Returns the capacity of this buffer. */
+ std::size_t capacity() const FMT_NOEXCEPT { return capacity_; }
+
+ /** Returns a pointer to the buffer data. */
+ T* data() FMT_NOEXCEPT { return ptr_; }
+
+ /** Returns a pointer to the buffer data. */
+ const T* data() const FMT_NOEXCEPT { return ptr_; }
+
+ /**
+ Resizes the buffer. If T is a POD type new elements may not be initialized.
+ */
+ void resize(std::size_t new_size) {
+ reserve(new_size);
+ size_ = new_size;
+ }
+
+ /** Clears this buffer. */
+ void clear() { size_ = 0; }
+
+ /** Reserves space to store at least *capacity* elements. */
+ void reserve(std::size_t new_capacity) {
+ if (new_capacity > capacity_) grow(new_capacity);
+ }
+
+ void push_back(const T& value) {
+ 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);
+
+ T& operator[](std::size_t index) { return ptr_[index]; }
+ const T& operator[](std::size_t index) const { return ptr_[index]; }
};
-template <typename Char>
-struct named_arg_base;
+// A container-backed buffer.
+template <typename Container>
+class container_buffer : public buffer<typename Container::value_type> {
+ private:
+ Container& container_;
-template <typename T, typename Char>
-struct named_arg;
+ protected:
+ void grow(std::size_t capacity) FMT_OVERRIDE {
+ container_.resize(capacity);
+ this->set(&container_[0], capacity);
+ }
+
+ public:
+ explicit container_buffer(Container& c)
+ : buffer<typename Container::value_type>(c.size()), container_(c) {}
+};
+
+// Extracts a reference to the container from back_insert_iterator.
+template <typename Container>
+inline Container& get_container(std::back_insert_iterator<Container> it) {
+ using bi_iterator = std::back_insert_iterator<Container>;
+ struct accessor : bi_iterator {
+ accessor(bi_iterator iter) : bi_iterator(iter) {}
+ using bi_iterator::container;
+ };
+ return *accessor(it).container;
+}
+
+template <typename T, typename Char = char, typename Enable = void>
+struct fallback_formatter {
+ fallback_formatter() = delete;
+};
+
+// Specifies if T has an enabled fallback_formatter specialization.
+template <typename T, typename Context>
+using has_fallback_formatter =
+ std::is_constructible<fallback_formatter<T, typename Context::char_type>>;
+
+template <typename Char> struct named_arg_base;
+template <typename T, typename Char> struct named_arg;
enum type {
- none_type, named_arg_type,
+ none_type,
+ named_arg_type,
// Integer types should go first,
- int_type, uint_type, long_long_type, ulong_long_type, bool_type, char_type,
+ int_type,
+ uint_type,
+ long_long_type,
+ ulong_long_type,
+ bool_type,
+ char_type,
last_integer_type = char_type,
// followed by floating-point types.
- double_type, long_double_type, last_numeric_type = long_double_type,
- cstring_type, string_type, pointer_type, custom_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, custom_type> {};
+
+#define FMT_TYPE_CONSTANT(Type, constant) \
+ template <typename Char> \
+ struct type_constant<Type, Char> : std::integral_constant<type, constant> {}
+
+FMT_TYPE_CONSTANT(const named_arg_base<Char>&, named_arg_type);
+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(bool, bool_type);
+FMT_TYPE_CONSTANT(Char, char_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);
+
FMT_CONSTEXPR bool is_integral(type t) {
- FMT_ASSERT(t != internal::named_arg_type, "invalid argument type");
- return t > internal::none_type && t <= internal::last_integer_type;
+ FMT_ASSERT(t != named_arg_type, "invalid argument type");
+ return t > none_type && t <= last_integer_type;
}
FMT_CONSTEXPR bool is_arithmetic(type t) {
- FMT_ASSERT(t != internal::named_arg_type, "invalid argument type");
- return t > internal::none_type && t <= internal::last_numeric_type;
+ FMT_ASSERT(t != named_arg_type, "invalid argument type");
+ return t > none_type && t <= last_numeric_type;
}
-template <typename Char>
-struct string_value {
- const Char *value;
+template <typename Char> struct string_value {
+ const Char* data;
std::size_t size;
};
-template <typename Context>
-struct custom_value {
- const void *value;
- void (*format)(const void *arg, Context &ctx);
+template <typename Context> struct custom_value {
+ using parse_context = basic_parse_context<typename Context::char_type>;
+ const void* value;
+ void (*format)(const void* arg, parse_context& parse_ctx, Context& ctx);
};
// A formatting argument value.
-template <typename Context>
-class value {
+template <typename Context> class value {
public:
- typedef typename Context::char_type char_type;
+ using char_type = typename Context::char_type;
union {
int int_value;
unsigned uint_value;
long long long_long_value;
unsigned long long ulong_long_value;
+ bool bool_value;
+ char_type char_value;
double double_value;
long double long_double_value;
- const void *pointer;
+ const void* pointer;
string_value<char_type> string;
- string_value<signed char> sstring;
- string_value<unsigned char> ustring;
custom_value<Context> custom;
+ const named_arg_base<char_type>* named_arg;
};
FMT_CONSTEXPR value(int val = 0) : int_value(val) {}
- value(unsigned val) { uint_value = val; }
- value(long long val) { long_long_value = val; }
- value(unsigned long long val) { ulong_long_value = val; }
- value(double val) { double_value = val; }
- value(long double val) { long_double_value = val; }
- value(const char_type *val) { string.value = val; }
- value(const signed char *val) {
- static_assert(std::is_same<char, char_type>::value,
- "incompatible string types");
- sstring.value = val;
- }
- value(const unsigned char *val) {
- static_assert(std::is_same<char, char_type>::value,
- "incompatible string types");
- ustring.value = val;
- }
+ FMT_CONSTEXPR value(unsigned val) : uint_value(val) {}
+ value(long long val) : long_long_value(val) {}
+ value(unsigned long long val) : ulong_long_value(val) {}
+ value(double val) : double_value(val) {}
+ value(long double val) : long_double_value(val) {}
+ value(bool val) : bool_value(val) {}
+ value(char_type val) : char_value(val) {}
+ value(const char_type* val) { string.data = val; }
value(basic_string_view<char_type> val) {
- string.value = val.data();
+ string.data = val.data();
string.size = val.size();
}
- value(const void *val) { pointer = val; }
+ value(const void* val) : pointer(val) {}
- template <typename T>
- explicit value(const T &val) {
+ template <typename T> value(const T& val) {
custom.value = &val;
- custom.format = &format_custom_arg<T>;
+ // 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<
+ T, conditional_t<has_formatter<T, Context>::value,
+ typename Context::template formatter_type<T>,
+ fallback_formatter<T, char_type>>>;
}
- const named_arg_base<char_type> &as_named_arg() {
- return *static_cast<const named_arg_base<char_type>*>(pointer);
- }
+ value(const named_arg_base<char_type>& val) { named_arg = &val; }
private:
// Formats an argument of a custom type, such as a user-defined class.
- template <typename T>
- static void format_custom_arg(const void *arg, Context &ctx) {
- // 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`.
- typename Context::template formatter_type<T>::type f;
- auto &&parse_ctx = ctx.parse_context();
+ template <typename T, typename Formatter>
+ static void format_custom_arg(const void* arg,
+ basic_parse_context<char_type>& parse_ctx,
+ Context& ctx) {
+ Formatter f;
parse_ctx.advance_to(f.parse(parse_ctx));
ctx.advance_to(f.format(*static_cast<const T*>(arg), ctx));
}
};
-// Value initializer used to delay conversion to value and reduce memory churn.
-template <typename Context, typename T, type TYPE>
-struct init {
- T val;
- static const type type_tag = TYPE;
-
- FMT_CONSTEXPR init(const T &v) : val(v) {}
- FMT_CONSTEXPR operator value<Context>() const { return value<Context>(val); }
-};
-
template <typename Context, typename T>
-FMT_CONSTEXPR basic_format_arg<Context> make_arg(const T &value);
+FMT_CONSTEXPR basic_format_arg<Context> make_arg(const T& value);
-#define FMT_MAKE_VALUE(TAG, ArgType, ValueType) \
- template <typename C> \
- FMT_CONSTEXPR init<C, ValueType, TAG> make_value(ArgType val) { \
- return static_cast<ValueType>(val); \
+// 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>;
+
+// Maps formatting arguments to core types.
+template <typename Context> struct arg_mapper {
+ using char_type = typename Context::char_type;
+
+ FMT_CONSTEXPR int map(signed char val) { return val; }
+ FMT_CONSTEXPR unsigned map(unsigned char val) { return val; }
+ FMT_CONSTEXPR int map(short val) { return val; }
+ FMT_CONSTEXPR unsigned map(unsigned short val) { return val; }
+ FMT_CONSTEXPR int map(int val) { return val; }
+ FMT_CONSTEXPR unsigned map(unsigned val) { return val; }
+ FMT_CONSTEXPR long_type map(long val) { return val; }
+ FMT_CONSTEXPR ulong_type map(unsigned long val) { return val; }
+ FMT_CONSTEXPR long long map(long long val) { return val; }
+ FMT_CONSTEXPR unsigned long long map(unsigned long long val) { return val; }
+ FMT_CONSTEXPR bool map(bool val) { return val; }
+
+ template <typename T, FMT_ENABLE_IF(is_char<T>::value)>
+ FMT_CONSTEXPR char_type map(T val) {
+ static_assert(
+ std::is_same<T, char>::value || std::is_same<T, char_type>::value,
+ "mixing character types is disallowed");
+ return val;
}
-#define FMT_MAKE_VALUE_SAME(TAG, Type) \
- template <typename C> \
- FMT_CONSTEXPR init<C, Type, TAG> make_value(Type val) { return val; }
-
-FMT_MAKE_VALUE(bool_type, bool, int)
-FMT_MAKE_VALUE(int_type, short, int)
-FMT_MAKE_VALUE(uint_type, unsigned short, unsigned)
-FMT_MAKE_VALUE_SAME(int_type, int)
-FMT_MAKE_VALUE_SAME(uint_type, unsigned)
+ FMT_CONSTEXPR double map(float val) { return static_cast<double>(val); }
+ FMT_CONSTEXPR double map(double val) { return val; }
+ FMT_CONSTEXPR long double map(long double val) { return val; }
+
+ FMT_CONSTEXPR const char_type* map(char_type* val) { return val; }
+ FMT_CONSTEXPR const char_type* map(const char_type* val) { return val; }
+ template <typename T, FMT_ENABLE_IF(is_string<T>::value)>
+ FMT_CONSTEXPR basic_string_view<char_type> map(const T& val) {
+ static_assert(std::is_same<char_type, char_t<T>>::value,
+ "mixing character types is disallowed");
+ return to_string_view(val);
+ }
+ template <typename T,
+ FMT_ENABLE_IF(
+ std::is_constructible<basic_string_view<char_type>, T>::value &&
+ !is_string<T>::value)>
+ FMT_CONSTEXPR basic_string_view<char_type> map(const T& val) {
+ return basic_string_view<char_type>(val);
+ }
+ FMT_CONSTEXPR const char* map(const signed char* val) {
+ static_assert(std::is_same<char_type, char>::value, "invalid string type");
+ return reinterpret_cast<const char*>(val);
+ }
+ FMT_CONSTEXPR const char* map(const unsigned char* val) {
+ static_assert(std::is_same<char_type, char>::value, "invalid string type");
+ return reinterpret_cast<const char*>(val);
+ }
-// 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.
-typedef std::conditional<sizeof(long) == sizeof(int), int, long long>::type
- long_type;
-FMT_MAKE_VALUE(
- (sizeof(long) == sizeof(int) ? int_type : long_long_type), long, long_type)
-typedef std::conditional<sizeof(unsigned long) == sizeof(unsigned),
- unsigned, unsigned long long>::type ulong_type;
-FMT_MAKE_VALUE(
- (sizeof(unsigned long) == sizeof(unsigned) ? uint_type : ulong_long_type),
- unsigned long, ulong_type)
-
-FMT_MAKE_VALUE_SAME(long_long_type, long long)
-FMT_MAKE_VALUE_SAME(ulong_long_type, unsigned long long)
-FMT_MAKE_VALUE(int_type, signed char, int)
-FMT_MAKE_VALUE(uint_type, unsigned char, unsigned)
-
-// This doesn't use FMT_MAKE_VALUE because of ambiguity in gcc 4.4.
-template <typename C, typename Char>
-FMT_CONSTEXPR typename std::enable_if<
- std::is_same<typename C::char_type, Char>::value,
- init<C, int, char_type>>::type make_value(Char val) { return val; }
-
-template <typename C>
-FMT_CONSTEXPR typename std::enable_if<
- !std::is_same<typename C::char_type, char>::value,
- init<C, int, char_type>>::type make_value(char val) { return val; }
-
-FMT_MAKE_VALUE(double_type, float, double)
-FMT_MAKE_VALUE_SAME(double_type, double)
-FMT_MAKE_VALUE_SAME(long_double_type, long double)
-
-// Formatting of wide strings into a narrow buffer and multibyte strings
-// into a wide buffer is disallowed (https://github.com/fmtlib/fmt/pull/606).
-FMT_MAKE_VALUE(cstring_type, typename C::char_type*,
- const typename C::char_type*)
-FMT_MAKE_VALUE(cstring_type, const typename C::char_type*,
- const typename C::char_type*)
-
-FMT_MAKE_VALUE(cstring_type, signed char*, const signed char*)
-FMT_MAKE_VALUE_SAME(cstring_type, const signed char*)
-FMT_MAKE_VALUE(cstring_type, unsigned char*, const unsigned char*)
-FMT_MAKE_VALUE_SAME(cstring_type, const unsigned char*)
-FMT_MAKE_VALUE_SAME(string_type, basic_string_view<typename C::char_type>)
-FMT_MAKE_VALUE(string_type,
- typename basic_string_view<typename C::char_type>::type,
- basic_string_view<typename C::char_type>)
-FMT_MAKE_VALUE(string_type, const std::basic_string<typename C::char_type>&,
- basic_string_view<typename C::char_type>)
-FMT_MAKE_VALUE(pointer_type, void*, const void*)
-FMT_MAKE_VALUE_SAME(pointer_type, const void*)
-
-#if FMT_USE_NULLPTR
-FMT_MAKE_VALUE(pointer_type, std::nullptr_t, const void*)
-#endif
+ FMT_CONSTEXPR const void* map(void* val) { return val; }
+ FMT_CONSTEXPR const void* map(const void* val) { return val; }
+ FMT_CONSTEXPR const void* map(std::nullptr_t val) { return val; }
+ template <typename T> FMT_CONSTEXPR int map(const T*) {
+ // Formatting of arbitrary pointers is disallowed. If you want to output
+ // a pointer cast it to "void *" or "const void *". In particular, this
+ // forbids formatting of "[const] volatile char *" which is printed as bool
+ // by iostreams.
+ static_assert(!sizeof(T), "formatting of non-void pointers is disallowed");
+ return 0;
+ }
-// Formatting of arbitrary pointers is disallowed. If you want to output a
-// pointer cast it to "void *" or "const void *". In particular, this forbids
-// formatting of "[const] volatile char *" which is printed as bool by
-// iostreams.
-template <typename C, typename T>
-typename std::enable_if<!std::is_same<T, typename C::char_type>::value>::type
- make_value(const T *) {
- static_assert(!sizeof(T), "formatting of non-void pointers is disallowed");
-}
+ template <typename T,
+ FMT_ENABLE_IF(std::is_enum<T>::value &&
+ !has_formatter<T, Context>::value &&
+ !has_fallback_formatter<T, Context>::value)>
+ FMT_CONSTEXPR int map(const T& val) {
+ return static_cast<int>(val);
+ }
+ template <typename T,
+ FMT_ENABLE_IF(!is_string<T>::value && !is_char<T>::value &&
+ (has_formatter<T, Context>::value ||
+ has_fallback_formatter<T, Context>::value))>
+ FMT_CONSTEXPR const T& map(const T& val) {
+ return val;
+ }
-template <typename C, typename T>
-inline typename std::enable_if<
- std::is_enum<T>::value && convert_to_int<T, typename C::char_type>::value,
- init<C, int, int_type>>::type
- make_value(const T &val) { return static_cast<int>(val); }
-
-template <typename C, typename T, typename Char = typename C::char_type>
-inline typename std::enable_if<
- is_constructible<basic_string_view<Char>, T>::value &&
- !internal::is_string<T>::value,
- init<C, basic_string_view<Char>, string_type>>::type
- make_value(const T &val) { return basic_string_view<Char>(val); }
-
-template <typename C, typename T, typename Char = typename C::char_type>
-inline typename std::enable_if<
- !convert_to_int<T, Char>::value && !std::is_same<T, Char>::value &&
- !std::is_convertible<T, basic_string_view<Char>>::value &&
- !is_constructible<basic_string_view<Char>, T>::value &&
- !internal::is_string<T>::value,
- // Implicit conversion to std::string is not handled here because it's
- // unsafe: https://github.com/fmtlib/fmt/issues/729
- init<C, const T &, custom_type>>::type
- make_value(const T &val) { return val; }
-
-template <typename C, typename T>
-init<C, const void*, named_arg_type>
- make_value(const named_arg<T, typename C::char_type> &val) {
- basic_format_arg<C> arg = make_arg<C>(val.value);
- std::memcpy(val.data, &arg, sizeof(arg));
- return static_cast<const void*>(&val);
-}
+ template <typename T>
+ FMT_CONSTEXPR const named_arg_base<char_type>& map(
+ const named_arg<T, char_type>& val) {
+ auto arg = make_arg<Context>(val.value);
+ std::memcpy(val.data, &arg, sizeof(arg));
+ return val;
+ }
+};
-template <typename C, typename S>
-FMT_CONSTEXPR11 typename std::enable_if<
- internal::is_string<S>::value,
- init<C, basic_string_view<typename C::char_type>, string_type>>::type
- make_value(const S &val) {
- // Handle adapted strings.
- static_assert(std::is_same<
- typename C::char_type, typename internal::char_t<S>::type>::value,
- "mismatch between char-types of context and argument");
- return to_string_view(val);
-}
+// 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<T>())),
+ typename Context::char_type>;
// Maximum number of arguments with packed types.
enum { max_packed_args = 15 };
enum : unsigned long long { is_unpacked_bit = 1ull << 63 };
-template <typename Context>
-class arg_map;
+template <typename Context> class arg_map;
} // namespace internal
// A formatting argument. It is a trivially copyable/constructible type to
// allow storage in basic_memory_buffer.
-template <typename Context>
-class basic_format_arg {
+template <typename Context> class basic_format_arg {
private:
internal::value<Context> value_;
internal::type type_;
template <typename ContextType, typename T>
- friend FMT_CONSTEXPR basic_format_arg<ContextType>
- internal::make_arg(const T &value);
+ friend FMT_CONSTEXPR basic_format_arg<ContextType> internal::make_arg(
+ const T& value);
template <typename Visitor, typename Ctx>
- friend FMT_CONSTEXPR typename internal::result_of<Visitor(int)>::type
- visit_format_arg(Visitor &&vis, const basic_format_arg<Ctx> &arg);
+ 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 internal::arg_map<Context>;
- typedef typename Context::char_type char_type;
+ using char_type = typename Context::char_type;
public:
class handle {
public:
- explicit handle(internal::custom_value<Context> custom): custom_(custom) {}
+ explicit handle(internal::custom_value<Context> custom) : custom_(custom) {}
- void format(Context &ctx) const { custom_.format(custom_.value, ctx); }
+ void format(basic_parse_context<char_type>& parse_ctx, Context& ctx) const {
+ custom_.format(custom_.value, parse_ctx, ctx);
+ }
private:
internal::custom_value<Context> custom_;
FMT_CONSTEXPR basic_format_arg() : type_(internal::none_type) {}
- FMT_EXPLICIT operator bool() const FMT_NOEXCEPT {
+ FMT_CONSTEXPR explicit operator bool() const FMT_NOEXCEPT {
return type_ != internal::none_type;
}
bool is_arithmetic() const { return internal::is_arithmetic(type_); }
};
-struct monostate {};
-
/**
\rst
Visits an argument dispatching to the appropriate visit method based on
\endrst
*/
template <typename Visitor, typename Context>
-FMT_CONSTEXPR typename internal::result_of<Visitor(int)>::type
- visit_format_arg(Visitor &&vis, const basic_format_arg<Context> &arg) {
- typedef typename Context::char_type char_type;
+FMT_CONSTEXPR auto visit_format_arg(Visitor&& vis,
+ const basic_format_arg<Context>& arg)
+ -> decltype(vis(0)) {
+ using char_type = typename Context::char_type;
switch (arg.type_) {
case internal::none_type:
break;
case internal::ulong_long_type:
return vis(arg.value_.ulong_long_value);
case internal::bool_type:
- return vis(arg.value_.int_value != 0);
+ return vis(arg.value_.bool_value);
case internal::char_type:
- return vis(static_cast<char_type>(arg.value_.int_value));
+ return vis(arg.value_.char_value);
case internal::double_type:
return vis(arg.value_.double_value);
case internal::long_double_type:
return vis(arg.value_.long_double_value);
case internal::cstring_type:
- return vis(arg.value_.string.value);
+ return vis(arg.value_.string.data);
case internal::string_type:
- return vis(basic_string_view<char_type>(
- arg.value_.string.value, arg.value_.string.size));
+ return vis(basic_string_view<char_type>(arg.value_.string.data,
+ arg.value_.string.size));
case internal::pointer_type:
return vis(arg.value_.pointer);
case internal::custom_type:
return vis(monostate());
}
-// DEPRECATED!
-template <typename Visitor, typename Context>
-FMT_CONSTEXPR typename internal::result_of<Visitor(int)>::type
- visit(Visitor &&vis, const basic_format_arg<Context> &arg) {
- return visit_format_arg(std::forward<Visitor>(vis), arg);
-}
-
-// Parsing context consisting of a format string range being parsed and an
-// argument counter for automatic indexing.
-template <typename Char, typename ErrorHandler = internal::error_handler>
-class basic_parse_context : private ErrorHandler {
- private:
- basic_string_view<Char> format_str_;
- int next_arg_id_;
-
- public:
- typedef Char char_type;
- typedef typename basic_string_view<Char>::iterator iterator;
-
- explicit FMT_CONSTEXPR basic_parse_context(
- basic_string_view<Char> format_str, ErrorHandler eh = ErrorHandler())
- : ErrorHandler(eh), format_str_(format_str), next_arg_id_(0) {}
-
- // Returns an iterator to the beginning of the format string range being
- // parsed.
- FMT_CONSTEXPR iterator begin() const FMT_NOEXCEPT {
- return format_str_.begin();
- }
-
- // Returns an iterator past the end of the format string range being parsed.
- FMT_CONSTEXPR iterator end() const FMT_NOEXCEPT { return format_str_.end(); }
-
- // Advances the begin iterator to ``it``.
- FMT_CONSTEXPR void advance_to(iterator it) {
- format_str_.remove_prefix(internal::to_unsigned(it - begin()));
- }
-
- // Returns the next argument index.
- FMT_CONSTEXPR unsigned next_arg_id();
-
- FMT_CONSTEXPR bool check_arg_id(unsigned) {
- if (next_arg_id_ > 0) {
- on_error("cannot switch from automatic to manual argument indexing");
- return false;
- }
- next_arg_id_ = -1;
- return true;
- }
- void check_arg_id(basic_string_view<Char>) {}
-
- FMT_CONSTEXPR void on_error(const char *message) {
- ErrorHandler::on_error(message);
- }
-
- FMT_CONSTEXPR ErrorHandler error_handler() const { return *this; }
-};
-
-typedef basic_parse_context<char> format_parse_context;
-typedef basic_parse_context<wchar_t> wformat_parse_context;
-
-// DEPRECATED!
-typedef basic_parse_context<char> parse_context;
-typedef basic_parse_context<wchar_t> wparse_context;
-
namespace internal {
// A map from argument names to their values for named arguments.
-template <typename Context>
-class arg_map {
+template <typename Context> class arg_map {
private:
- arg_map(const arg_map &) = delete;
- void operator=(const arg_map &) = delete;
+ arg_map(const arg_map&) = delete;
+ void operator=(const arg_map&) = delete;
- typedef typename Context::char_type char_type;
+ using char_type = typename Context::char_type;
struct entry {
basic_string_view<char_type> name;
basic_format_arg<Context> arg;
};
- entry *map_;
+ entry* map_;
unsigned size_;
void push_back(value<Context> val) {
- const internal::named_arg_base<char_type> &named = val.as_named_arg();
- map_[size_] = entry{named.name, named.template deserialize<Context>()};
+ const auto& named = *val.named_arg;
+ map_[size_] = {named.name, named.template deserialize<Context>()};
++size_;
}
public:
- arg_map() : map_(FMT_NULL), size_(0) {}
- void init(const basic_format_args<Context> &args);
- ~arg_map() { delete [] map_; }
+ arg_map() : map_(nullptr), size_(0) {}
+ void init(const basic_format_args<Context>& args);
+ ~arg_map() { delete[] map_; }
basic_format_arg<Context> find(basic_string_view<char_type> name) const {
// The list is unsorted, so just return the first matching name.
for (entry *it = map_, *end = map_ + size_; it != end; ++it) {
- if (it->name == name)
- return it->arg;
+ if (it->name == name) return it->arg;
}
return {};
}
// A type-erased reference to an std::locale to avoid heavy <locale> include.
class locale_ref {
private:
- const void *locale_; // A type-erased pointer to std::locale.
- friend class locale;
-
- public:
- locale_ref() : locale_(FMT_NULL) {}
-
- template <typename Locale>
- explicit locale_ref(const Locale &loc);
-
- template <typename Locale>
- Locale get() const;
-};
-
-template <typename OutputIt, typename Context, typename Char>
-class context_base {
- public:
- typedef OutputIt iterator;
-
- private:
- basic_parse_context<Char> parse_context_;
- iterator out_;
- basic_format_args<Context> args_;
- locale_ref loc_;
-
- protected:
- typedef Char char_type;
- typedef basic_format_arg<Context> format_arg;
-
- context_base(OutputIt out, basic_string_view<char_type> format_str,
- basic_format_args<Context> ctx_args,
- locale_ref loc = locale_ref())
- : parse_context_(format_str), out_(out), args_(ctx_args), loc_(loc) {}
-
- // Returns the argument with specified index.
- format_arg do_get_arg(unsigned arg_id) {
- format_arg arg = args_.get(arg_id);
- if (!arg)
- parse_context_.on_error("argument index out of range");
- return arg;
- }
-
- // Checks if manual indexing is used and returns the argument with
- // specified index.
- format_arg get_arg(unsigned arg_id) {
- return this->parse_context().check_arg_id(arg_id) ?
- this->do_get_arg(arg_id) : format_arg();
- }
+ const void* locale_; // A type-erased pointer to std::locale.
public:
- basic_parse_context<char_type> &parse_context() { return parse_context_; }
- basic_format_args<Context> args() const { return args_; } // DEPRECATED!
- basic_format_arg<Context> arg(unsigned id) const { return args_.get(id); }
-
- internal::error_handler error_handler() {
- return parse_context_.error_handler();
- }
-
- void on_error(const char *message) { parse_context_.on_error(message); }
-
- // Returns an iterator to the beginning of the output range.
- iterator out() { return out_; }
- iterator begin() { return out_; } // deprecated
-
- // Advances the begin iterator to ``it``.
- void advance_to(iterator it) { out_ = it; }
-
- locale_ref locale() { return loc_; }
-};
+ locale_ref() : locale_(nullptr) {}
+ template <typename Locale> explicit locale_ref(const Locale& loc);
-template <typename Context, typename T>
-struct get_type {
- typedef decltype(make_value<Context>(
- declval<typename std::decay<T>::type&>())) value_type;
- static const type value = value_type::type_tag;
+ template <typename Locale> Locale get() const;
};
-template <typename Context>
-FMT_CONSTEXPR11 unsigned long long get_types() { return 0; }
+template <typename> constexpr unsigned long long encode_types() { return 0; }
template <typename Context, typename Arg, typename... Args>
-FMT_CONSTEXPR11 unsigned long long get_types() {
- return get_type<Context, Arg>::value | (get_types<Context, Args...>() << 4);
+constexpr unsigned long long encode_types() {
+ return mapped_type_constant<Arg, Context>::value |
+ (encode_types<Context, Args...>() << 4);
}
template <typename Context, typename T>
-FMT_CONSTEXPR basic_format_arg<Context> make_arg(const T &value) {
+FMT_CONSTEXPR basic_format_arg<Context> make_arg(const T& value) {
basic_format_arg<Context> arg;
- arg.type_ = get_type<Context, T>::value;
- arg.value_ = make_value<Context>(value);
+ arg.type_ = mapped_type_constant<T, Context>::value;
+ arg.value_ = arg_mapper<Context>().map(value);
return arg;
}
-template <bool IS_PACKED, typename Context, typename T>
-inline typename std::enable_if<IS_PACKED, value<Context>>::type
- make_arg(const T &value) {
- return make_value<Context>(value);
+template <bool IS_PACKED, typename Context, typename T,
+ FMT_ENABLE_IF(IS_PACKED)>
+inline value<Context> make_arg(const T& val) {
+ return arg_mapper<Context>().map(val);
}
-template <bool IS_PACKED, typename Context, typename T>
-inline typename std::enable_if<!IS_PACKED, basic_format_arg<Context>>::type
- make_arg(const T &value) {
+template <bool IS_PACKED, typename Context, typename T,
+ FMT_ENABLE_IF(!IS_PACKED)>
+inline basic_format_arg<Context> make_arg(const T& value) {
return make_arg<Context>(value);
}
} // namespace internal
// Formatting context.
-template <typename OutputIt, typename Char>
-class basic_format_context :
- public internal::context_base<
- OutputIt, basic_format_context<OutputIt, Char>, Char> {
+template <typename OutputIt, typename Char> class basic_format_context {
public:
/** The character type for the output. */
- typedef Char char_type;
-
- // using formatter_type = formatter<T, char_type>;
- template <typename T>
- struct formatter_type { typedef formatter<T, char_type> type; };
+ using char_type = Char;
private:
+ OutputIt out_;
+ basic_format_args<basic_format_context> args_;
internal::arg_map<basic_format_context> map_;
+ internal::locale_ref loc_;
- basic_format_context(const basic_format_context &) = delete;
- void operator=(const basic_format_context &) = delete;
-
- typedef internal::context_base<OutputIt, basic_format_context, Char> base;
- typedef typename base::format_arg format_arg;
- using base::get_arg;
+ basic_format_context(const basic_format_context&) = delete;
+ void operator=(const basic_format_context&) = delete;
public:
- using typename base::iterator;
+ using iterator = OutputIt;
+ using format_arg = basic_format_arg<basic_format_context>;
+ template <typename T> using formatter_type = formatter<T, char_type>;
/**
Constructs a ``basic_format_context`` object. References to the arguments are
stored in the object so make sure they have appropriate lifetimes.
*/
- basic_format_context(OutputIt out, basic_string_view<char_type> format_str,
+ basic_format_context(OutputIt out,
basic_format_args<basic_format_context> ctx_args,
internal::locale_ref loc = internal::locale_ref())
- : base(out, format_str, ctx_args, loc) {}
+ : out_(out), args_(ctx_args), loc_(loc) {}
- format_arg next_arg() {
- return this->do_get_arg(this->parse_context().next_arg_id());
- }
- format_arg get_arg(unsigned arg_id) { return this->do_get_arg(arg_id); }
+ format_arg arg(int id) const { return args_.get(id); }
// Checks if manual indexing is used and returns the argument with the
// specified name.
- format_arg get_arg(basic_string_view<char_type> name);
+ format_arg arg(basic_string_view<char_type> name);
+
+ internal::error_handler error_handler() { return {}; }
+ void on_error(const char* message) { error_handler().on_error(message); }
+
+ // Returns an iterator to the beginning of the output range.
+ iterator out() { return out_; }
+
+ // Advances the begin iterator to ``it``.
+ void advance_to(iterator it) { out_ = it; }
+
+ internal::locale_ref locale() { return loc_; }
};
template <typename Char>
-struct buffer_context {
- typedef basic_format_context<
- std::back_insert_iterator<internal::basic_buffer<Char>>, Char> type;
-};
-typedef buffer_context<char>::type format_context;
-typedef buffer_context<wchar_t>::type wformat_context;
+using buffer_context =
+ basic_format_context<std::back_insert_iterator<internal::buffer<Char>>,
+ Char>;
+using format_context = buffer_context<char>;
+using wformat_context = buffer_context<wchar_t>;
/**
\rst
such as `~fmt::vformat`.
\endrst
*/
-template <typename Context, typename ...Args>
-class format_arg_store {
+template <typename Context, typename... Args> class format_arg_store {
private:
- static const size_t NUM_ARGS = sizeof...(Args);
+ static const size_t num_args = sizeof...(Args);
+ static const bool is_packed = num_args < internal::max_packed_args;
- // Packed is a macro on MinGW so use IS_PACKED instead.
- static const bool IS_PACKED = NUM_ARGS < internal::max_packed_args;
-
- typedef typename std::conditional<IS_PACKED,
- internal::value<Context>, basic_format_arg<Context>>::type value_type;
+ using value_type = conditional_t<is_packed, internal::value<Context>,
+ basic_format_arg<Context>>;
// If the arguments are not packed, add one more element to mark the end.
- static const size_t DATA_SIZE =
- NUM_ARGS + (IS_PACKED && NUM_ARGS != 0 ? 0 : 1);
- value_type data_[DATA_SIZE];
+ value_type data_[num_args + (num_args == 0 ? 1 : 0)];
friend class basic_format_args<Context>;
- static FMT_CONSTEXPR11 unsigned long long get_types() {
- return IS_PACKED ?
- internal::get_types<Context, Args...>() :
- internal::is_unpacked_bit | NUM_ARGS;
- }
-
public:
-#if FMT_USE_CONSTEXPR11
- static FMT_CONSTEXPR11 unsigned long long TYPES = get_types();
-#else
- static const unsigned long long TYPES;
-#endif
+ static constexpr unsigned long long types =
+ is_packed ? internal::encode_types<Context, Args...>()
+ : internal::is_unpacked_bit | num_args;
+ FMT_DEPRECATED static constexpr unsigned long long TYPES = types;
-#if (FMT_GCC_VERSION && FMT_GCC_VERSION <= 405) || \
- (FMT_MSC_VER && FMT_MSC_VER <= 1800)
- // Workaround array initialization issues in gcc <= 4.5 and MSVC <= 2013.
- format_arg_store(const Args &... args) {
- value_type init[DATA_SIZE] =
- {internal::make_arg<IS_PACKED, Context>(args)...};
- std::memcpy(data_, init, sizeof(init));
- }
-#else
- format_arg_store(const Args &... args)
- : data_{internal::make_arg<IS_PACKED, Context>(args)...} {}
-#endif
+ format_arg_store(const Args&... args)
+ : data_{internal::make_arg<is_packed, Context>(args)...} {}
};
-#if !FMT_USE_CONSTEXPR11
-template <typename Context, typename ...Args>
-const unsigned long long format_arg_store<Context, Args...>::TYPES =
- get_types();
-#endif
-
/**
\rst
Constructs an `~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::context`.
+ See `~fmt::arg` for lifetime considerations.
\endrst
*/
-template <typename Context = format_context, typename ...Args>
-inline format_arg_store<Context, Args...>
- make_format_args(const Args &... args) { return {args...}; }
+template <typename Context = format_context, typename... Args>
+inline format_arg_store<Context, Args...> make_format_args(
+ const Args&... args) {
+ return {args...};
+}
/** Formatting arguments. */
-template <typename Context>
-class basic_format_args {
+template <typename Context> class basic_format_args {
public:
- typedef unsigned size_type;
- typedef basic_format_arg<Context> format_arg;
+ using size_type = int;
+ using format_arg = basic_format_arg<Context>;
private:
// To reduce compiled code size per formatting function call, types of first
// This is done to reduce compiled code size as 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 internal::value<Context> *values_;
- const format_arg *args_;
+ const internal::value<Context>* values_;
+ const format_arg* args_;
};
bool is_packed() const { return (types_ & internal::is_unpacked_bit) == 0; }
- typename internal::type type(unsigned index) const {
- unsigned shift = index * 4;
- return static_cast<typename internal::type>(
- (types_ & (0xfull << shift)) >> shift);
+ internal::type type(int index) const {
+ int shift = index * 4;
+ return static_cast<internal::type>((types_ & (0xfull << shift)) >> shift);
}
friend class internal::arg_map<Context>;
- void set_data(const internal::value<Context> *values) { values_ = values; }
- void set_data(const format_arg *args) { args_ = args; }
+ void set_data(const internal::value<Context>* values) { values_ = values; }
+ void set_data(const format_arg* args) { args_ = args; }
- format_arg do_get(size_type index) const {
+ format_arg do_get(int index) const {
format_arg arg;
if (!is_packed()) {
auto num_args = max_size();
- if (index < num_args)
- arg = args_[index];
+ if (index < num_args) arg = args_[index];
return arg;
}
- if (index > internal::max_packed_args)
- return arg;
+ if (index > internal::max_packed_args) return arg;
arg.type_ = type(index);
- if (arg.type_ == internal::none_type)
- return arg;
- internal::value<Context> &val = arg.value_;
+ if (arg.type_ == internal::none_type) return arg;
+ internal::value<Context>& val = arg.value_;
val = values_[index];
return arg;
}
\endrst
*/
template <typename... Args>
- basic_format_args(const format_arg_store<Context, Args...> &store)
- : types_(static_cast<unsigned long long>(store.TYPES)) {
+ basic_format_args(const format_arg_store<Context, Args...>& store)
+ : types_(static_cast<unsigned long long>(store.types)) {
set_data(store.data_);
}
Constructs a `basic_format_args` object from a dynamic set of arguments.
\endrst
*/
- basic_format_args(const format_arg *args, size_type count)
- : types_(internal::is_unpacked_bit | count) {
+ basic_format_args(const format_arg* args, int count)
+ : types_(internal::is_unpacked_bit | internal::to_unsigned(count)) {
set_data(args);
}
/** Returns the argument at specified index. */
- format_arg get(size_type index) const {
+ format_arg get(int index) const {
format_arg arg = do_get(index);
if (arg.type_ == internal::named_arg_type)
- arg = arg.value_.as_named_arg().template deserialize<Context>();
+ arg = arg.value_.named_arg->template deserialize<Context>();
return arg;
}
- size_type max_size() const {
+ int max_size() const {
unsigned long long max_packed = internal::max_packed_args;
- return static_cast<size_type>(
- is_packed() ? max_packed : types_ & ~internal::is_unpacked_bit);
+ return static_cast<int>(is_packed() ? max_packed
+ : types_ & ~internal::is_unpacked_bit);
}
};
/** An alias to ``basic_format_args<context>``. */
-// It is a separate type rather than a typedef to make symbols readable.
+// It is a separate type rather than an alias to make symbols readable.
struct format_args : basic_format_args<format_context> {
- template <typename ...Args>
- format_args(Args &&... arg)
- : basic_format_args<format_context>(std::forward<Args>(arg)...) {}
+ template <typename... Args>
+ format_args(Args&&... args)
+ : basic_format_args<format_context>(std::forward<Args>(args)...) {}
};
struct wformat_args : basic_format_args<wformat_context> {
- template <typename ...Args>
- wformat_args(Args &&... arg)
- : basic_format_args<wformat_context>(std::forward<Args>(arg)...) {}
+ template <typename... Args>
+ wformat_args(Args&&... args)
+ : basic_format_args<wformat_context>(std::forward<Args>(args)...) {}
};
-#define FMT_ENABLE_IF_T(B, T) typename std::enable_if<B, T>::type
+template <typename Container> struct is_contiguous : std::false_type {};
-#ifndef FMT_USE_ALIAS_TEMPLATES
-# define FMT_USE_ALIAS_TEMPLATES FMT_HAS_FEATURE(cxx_alias_templates)
-#endif
-#if FMT_USE_ALIAS_TEMPLATES
-/** String's character type. */
-template <typename S>
-using char_t = FMT_ENABLE_IF_T(
- internal::is_string<S>::value, typename internal::char_t<S>::type);
-#define FMT_CHAR(S) fmt::char_t<S>
-#else
-template <typename S>
-struct char_t : std::enable_if<
- internal::is_string<S>::value, typename internal::char_t<S>::type> {};
-#define FMT_CHAR(S) typename char_t<S>::type
-#endif
+template <typename Char>
+struct is_contiguous<std::basic_string<Char>> : std::true_type {};
-namespace internal {
template <typename Char>
-struct named_arg_base {
+struct is_contiguous<internal::buffer<Char>> : std::true_type {};
+
+namespace internal {
+
+template <typename OutputIt>
+struct is_contiguous_back_insert_iterator : std::false_type {};
+template <typename Container>
+struct is_contiguous_back_insert_iterator<std::back_insert_iterator<Container>>
+ : is_contiguous<Container> {};
+
+template <typename Char> struct named_arg_base {
basic_string_view<Char> name;
// Serialized value<context>.
- mutable char data[
- sizeof(basic_format_arg<typename buffer_context<Char>::type>)];
+ mutable char data[sizeof(basic_format_arg<buffer_context<Char>>)];
named_arg_base(basic_string_view<Char> nm) : name(nm) {}
- template <typename Context>
- basic_format_arg<Context> deserialize() const {
+ template <typename Context> basic_format_arg<Context> deserialize() const {
basic_format_arg<Context> arg;
std::memcpy(&arg, data, sizeof(basic_format_arg<Context>));
return arg;
}
};
-template <typename T, typename Char>
-struct named_arg : named_arg_base<Char> {
- const T &value;
+template <typename T, typename Char> struct named_arg : named_arg_base<Char> {
+ const T& value;
- named_arg(basic_string_view<Char> name, const T &val)
- : named_arg_base<Char>(name), value(val) {}
+ named_arg(basic_string_view<Char> name, const T& val)
+ : named_arg_base<Char>(name), value(val) {}
};
-template <typename... Args, typename S>
-inline typename std::enable_if<!is_compile_string<S>::value>::type
- check_format_string(const S &) {}
-template <typename... Args, typename S>
-typename std::enable_if<is_compile_string<S>::value>::type
- check_format_string(S);
-
-template <typename S, typename... Args>
-struct checked_args : format_arg_store<
- typename buffer_context<FMT_CHAR(S)>::type, Args...> {
- typedef typename buffer_context<FMT_CHAR(S)>::type context;
-
- checked_args(const S &format_str, const Args &... args):
- format_arg_store<context, Args...>(args...) {
- internal::check_format_string<Args...>(format_str);
- }
-
- basic_format_args<context> operator*() const { return *this; }
-};
+template <typename..., typename S, FMT_ENABLE_IF(!is_compile_string<S>::value)>
+inline void check_format_string(const S&) {
+#if defined(FMT_ENFORCE_COMPILE_STRING)
+ static_assert(is_compile_string<S>::value,
+ "FMT_ENFORCE_COMPILE_STRING requires all format strings to "
+ "utilize FMT_STRING() or fmt().");
+#endif
+}
+template <typename..., typename S, FMT_ENABLE_IF(is_compile_string<S>::value)>
+void check_format_string(S);
+
+struct view {};
+template <bool...> struct bool_pack;
+template <bool... Args>
+using all_true =
+ std::is_same<bool_pack<Args..., true>, bool_pack<true, Args...>>;
+
+template <typename... Args, typename S, typename Char = char_t<S>>
+inline format_arg_store<buffer_context<Char>, remove_reference_t<Args>...>
+make_args_checked(const S& format_str,
+ const remove_reference_t<Args>&... args) {
+ static_assert(all_true<(!std::is_base_of<view, remove_reference_t<Args>>() ||
+ !std::is_reference<Args>())...>::value,
+ "passing views as lvalues is disallowed");
+ check_format_string<remove_const_t<remove_reference_t<Args>>...>(format_str);
+ return {args...};
+}
template <typename Char>
-std::basic_string<Char> vformat(
- basic_string_view<Char> format_str,
- basic_format_args<typename buffer_context<Char>::type> args);
+std::basic_string<Char> vformat(basic_string_view<Char> format_str,
+ basic_format_args<buffer_context<Char>> args);
template <typename Char>
-typename buffer_context<Char>::type::iterator vformat_to(
- internal::basic_buffer<Char> &buf, basic_string_view<Char> format_str,
- basic_format_args<typename buffer_context<Char>::type> args);
-}
+typename buffer_context<Char>::iterator vformat_to(
+ buffer<Char>& buf, basic_string_view<Char> format_str,
+ basic_format_args<buffer_context<Char>> args);
+} // namespace internal
/**
\rst
Returns a named argument to be used in a formatting function.
+ The named argument holds a reference and does not extend the lifetime
+ of its arguments.
+ Consequently, a dangling reference can accidentally be created.
+ The user should take care to only pass this function temporaries when
+ the named argument is itself a temporary, as per the following example.
+
**Example**::
fmt::print("Elapsed time: {s:.2f} seconds", fmt::arg("s", 1.23));
\endrst
*/
-template <typename T>
-inline internal::named_arg<T, char> arg(string_view name, const T &arg) {
- return {name, arg};
-}
-
-template <typename T>
-inline internal::named_arg<T, wchar_t> arg(wstring_view name, const T &arg) {
+template <typename S, typename T, typename Char = char_t<S>>
+inline internal::named_arg<T, Char> arg(const S& name, const T& arg) {
+ static_assert(internal::is_string<S>::value, "");
return {name, arg};
}
template <typename S, typename T, typename Char>
void arg(S, internal::named_arg<T, Char>) = delete;
-template <typename Container>
-struct is_contiguous: std::false_type {};
-
-template <typename Char>
-struct is_contiguous<std::basic_string<Char> >: std::true_type {};
-
-template <typename Char>
-struct is_contiguous<internal::basic_buffer<Char> >: std::true_type {};
-
/** Formats a string and writes the output to ``out``. */
-template <typename Container, typename S>
-typename std::enable_if<
- is_contiguous<Container>::value, std::back_insert_iterator<Container>>::type
- vformat_to(
- std::back_insert_iterator<Container> out,
- const S &format_str,
- basic_format_args<typename buffer_context<FMT_CHAR(S)>::type> args) {
- internal::container_buffer<Container> buf(internal::get_container(out));
+// GCC 8 and earlier cannot handle std::back_insert_iterator<Container> with
+// vformat_to<ArgFormatter>(...) overload, so SFINAE on iterator type instead.
+template <typename OutputIt, typename S, typename Char = char_t<S>,
+ FMT_ENABLE_IF(
+ internal::is_contiguous_back_insert_iterator<OutputIt>::value)>
+OutputIt vformat_to(OutputIt out, const S& format_str,
+ basic_format_args<buffer_context<Char>> args) {
+ using container = remove_reference_t<decltype(internal::get_container(out))>;
+ internal::container_buffer<container> buf((internal::get_container(out)));
internal::vformat_to(buf, to_string_view(format_str), args);
return out;
}
-template <typename Container, typename S, typename... Args>
-inline typename std::enable_if<
- is_contiguous<Container>::value && internal::is_string<S>::value,
- std::back_insert_iterator<Container>>::type
- format_to(std::back_insert_iterator<Container> out, const S &format_str,
- const Args &... args) {
- internal::checked_args<S, Args...> ca(format_str, args...);
- return vformat_to(out, to_string_view(format_str), *ca);
+template <typename Container, typename S, typename... Args,
+ FMT_ENABLE_IF(
+ is_contiguous<Container>::value&& internal::is_string<S>::value)>
+inline std::back_insert_iterator<Container> format_to(
+ std::back_insert_iterator<Container> out, const S& format_str,
+ Args&&... args) {
+ return vformat_to(
+ out, to_string_view(format_str),
+ {internal::make_args_checked<Args...>(format_str, args...)});
}
-template <typename S, typename Char = FMT_CHAR(S)>
+template <typename S, typename Char = char_t<S>>
inline std::basic_string<Char> vformat(
- const S &format_str,
- basic_format_args<typename buffer_context<Char>::type> args) {
+ const S& format_str, basic_format_args<buffer_context<Char>> args) {
return internal::vformat(to_string_view(format_str), args);
}
std::string message = fmt::format("The answer is {}", 42);
\endrst
*/
-template <typename S, typename... Args>
-inline std::basic_string<FMT_CHAR(S)> format(
- const S &format_str, const Args &... args) {
+// Pass char_t as a default template parameter instead of using
+// std::basic_string<char_t<S>> to reduce the symbol size.
+template <typename S, typename... Args, typename Char = char_t<S>>
+inline std::basic_string<Char> format(const S& format_str, Args&&... args) {
return internal::vformat(
- to_string_view(format_str),
- *internal::checked_args<S, Args...>(format_str, args...));
+ to_string_view(format_str),
+ {internal::make_args_checked<Args...>(format_str, args...)});
}
-FMT_API void vprint(std::FILE *f, string_view format_str, format_args args);
-FMT_API void vprint(std::FILE *f, wstring_view format_str, wformat_args args);
+FMT_API void vprint(std::FILE* f, string_view format_str, format_args args);
+FMT_API void vprint(std::FILE* f, wstring_view format_str, wformat_args args);
/**
\rst
fmt::print(stderr, "Don't {}!", "panic");
\endrst
*/
-template <typename S, typename... Args>
-inline FMT_ENABLE_IF_T(internal::is_string<S>::value, void)
- print(std::FILE *f, const S &format_str, const Args &... args) {
+template <typename S, typename... Args,
+ FMT_ENABLE_IF(internal::is_string<S>::value)>
+inline void print(std::FILE* f, const S& format_str, Args&&... args) {
vprint(f, to_string_view(format_str),
- internal::checked_args<S, Args...>(format_str, args...));
+ internal::make_args_checked<Args...>(format_str, args...));
}
FMT_API void vprint(string_view format_str, format_args args);
fmt::print("Elapsed time: {0:.2f} seconds", 1.23);
\endrst
*/
-template <typename S, typename... Args>
-inline FMT_ENABLE_IF_T(internal::is_string<S>::value, void)
- print(const S &format_str, const Args &... args) {
+template <typename S, typename... Args,
+ FMT_ENABLE_IF(internal::is_string<S>::value)>
+inline void print(const S& format_str, Args&&... args) {
vprint(to_string_view(format_str),
- internal::checked_args<S, Args...>(format_str, args...));
+ internal::make_args_checked<Args...>(format_str, args...));
}
FMT_END_NAMESPACE
#include <cstdarg>
#include <cstddef> // for std::ptrdiff_t
#include <cstring> // for std::memmove
+#include <cwchar>
#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)
-# include <locale>
+# include <locale>
#endif
#if FMT_USE_WINDOWS_H
-# if !defined(FMT_HEADER_ONLY) && !defined(WIN32_LEAN_AND_MEAN)
-# define WIN32_LEAN_AND_MEAN
-# endif
-# if defined(NOMINMAX) || defined(FMT_WIN_MINMAX)
-# include <windows.h>
-# else
-# define NOMINMAX
-# include <windows.h>
-# undef NOMINMAX
-# endif
+# if !defined(FMT_HEADER_ONLY) && !defined(WIN32_LEAN_AND_MEAN)
+# define WIN32_LEAN_AND_MEAN
+# endif
+# if defined(NOMINMAX) || defined(FMT_WIN_MINMAX)
+# include <windows.h>
+# else
+# define NOMINMAX
+# include <windows.h>
+# undef NOMINMAX
+# endif
#endif
#if FMT_EXCEPTIONS
-# define FMT_TRY try
-# define FMT_CATCH(x) catch (x)
+# define FMT_TRY try
+# define FMT_CATCH(x) catch (x)
#else
-# define FMT_TRY if (true)
-# define FMT_CATCH(x) if (false)
+# define FMT_TRY if (true)
+# define FMT_CATCH(x) if (false)
#endif
#ifdef _MSC_VER
-# pragma warning(push)
-# pragma warning(disable: 4127) // conditional expression is constant
-# pragma warning(disable: 4702) // unreachable code
+# pragma warning(push)
+# pragma warning(disable : 4127) // conditional expression is constant
+# pragma warning(disable : 4702) // unreachable code
// Disable deprecation warning for strerror. The latter is not called but
// MSVC fails to detect it.
-# pragma warning(disable: 4996)
+# pragma warning(disable : 4996)
#endif
// Dummy implementations of strerror_r and strerror_s called if corresponding
// system functions are not available.
-inline fmt::internal::null<> strerror_r(int, char *, ...) {
+inline fmt::internal::null<> strerror_r(int, char*, ...) {
return fmt::internal::null<>();
}
-inline fmt::internal::null<> strerror_s(char *, std::size_t, ...) {
+inline fmt::internal::null<> strerror_s(char*, std::size_t, ...) {
return fmt::internal::null<>();
}
FMT_BEGIN_NAMESPACE
-
-namespace {
+namespace internal {
#ifndef _MSC_VER
-# define FMT_SNPRINTF snprintf
+# define FMT_SNPRINTF snprintf
#else // _MSC_VER
-inline int fmt_snprintf(char *buffer, size_t size, const char *format, ...) {
+inline int fmt_snprintf(char* buffer, size_t size, const char* format, ...) {
va_list args;
va_start(args, format);
int result = vsnprintf_s(buffer, size, _TRUNCATE, format, args);
va_end(args);
return result;
}
-# define FMT_SNPRINTF fmt_snprintf
+# define FMT_SNPRINTF fmt_snprintf
#endif // _MSC_VER
-#if defined(_WIN32) && defined(__MINGW32__) && !defined(__NO_ISOCEXT)
-# define FMT_SWPRINTF snwprintf
-#else
-# define FMT_SWPRINTF swprintf
-#endif // defined(_WIN32) && defined(__MINGW32__) && !defined(__NO_ISOCEXT)
-
-typedef void (*FormatFunc)(internal::buffer &, int, string_view);
+using format_func = void (*)(internal::buffer<char>&, int, string_view);
// Portable thread-safe version of strerror.
// Sets buffer to point to a string describing the error code.
// ERANGE - buffer is not large enough to store the error message
// other - failure
// Buffer should be at least of size 1.
-int safe_strerror(
- int error_code, char *&buffer, std::size_t buffer_size) FMT_NOEXCEPT {
- FMT_ASSERT(buffer != FMT_NULL && buffer_size != 0, "invalid buffer");
+FMT_FUNC int safe_strerror(int error_code, char*& buffer,
+ std::size_t buffer_size) FMT_NOEXCEPT {
+ FMT_ASSERT(buffer != nullptr && buffer_size != 0, "invalid buffer");
class dispatcher {
private:
int error_code_;
- char *&buffer_;
+ char*& buffer_;
std::size_t buffer_size_;
// A noop assignment operator to avoid bogus warnings.
- void operator=(const dispatcher &) {}
+ void operator=(const dispatcher&) {}
// Handle the result of XSI-compliant version of strerror_r.
int handle(int result) {
}
// Handle the result of GNU-specific version of strerror_r.
- int handle(char *message) {
+ int handle(char* message) {
// If the buffer is full then the message is probably truncated.
if (message == buffer_ && strlen(buffer_) == buffer_size_ - 1)
return ERANGE;
// Fallback to strerror_s when strerror_r is not available.
int fallback(int result) {
// If the buffer is full then the message is probably truncated.
- return result == 0 && strlen(buffer_) == buffer_size_ - 1 ?
- ERANGE : result;
+ return result == 0 && strlen(buffer_) == buffer_size_ - 1 ? ERANGE
+ : result;
}
#if !FMT_MSC_VER
#endif
public:
- dispatcher(int err_code, char *&buf, std::size_t buf_size)
- : error_code_(err_code), buffer_(buf), buffer_size_(buf_size) {}
+ dispatcher(int err_code, char*& buf, std::size_t buf_size)
+ : error_code_(err_code), buffer_(buf), buffer_size_(buf_size) {}
- int run() {
- return handle(strerror_r(error_code_, buffer_, buffer_size_));
- }
+ int run() { return handle(strerror_r(error_code_, buffer_, buffer_size_)); }
};
return dispatcher(error_code, buffer, buffer_size).run();
}
-void format_error_code(internal::buffer &out, int error_code,
- string_view message) FMT_NOEXCEPT {
+FMT_FUNC void format_error_code(internal::buffer<char>& out, int error_code,
+ string_view message) FMT_NOEXCEPT {
// Report error code making sure that the output fits into
// inline_buffer_size to avoid dynamic memory allocation and potential
// bad_alloc.
static const char ERROR_STR[] = "error ";
// Subtract 2 to account for terminating null characters in SEP and ERROR_STR.
std::size_t error_code_size = sizeof(SEP) + sizeof(ERROR_STR) - 2;
- typedef internal::int_traits<int>::main_type main_type;
- main_type abs_value = static_cast<main_type>(error_code);
+ auto abs_value = static_cast<uint32_or_64_t<int>>(error_code);
if (internal::is_negative(error_code)) {
abs_value = 0 - abs_value;
++error_code_size;
}
error_code_size += internal::to_unsigned(internal::count_digits(abs_value));
- writer w(out);
+ internal::writer w(out);
if (message.size() <= inline_buffer_size - error_code_size) {
w.write(message);
w.write(SEP);
assert(out.size() <= inline_buffer_size);
}
-void report_error(FormatFunc func, int error_code,
- string_view message) FMT_NOEXCEPT {
+// A wrapper around fwrite that throws on error.
+FMT_FUNC void fwrite_fully(const void* ptr, size_t size, size_t count,
+ FILE* stream) {
+ size_t written = std::fwrite(ptr, size, count, stream);
+ if (written < count) {
+ FMT_THROW(system_error(errno, "cannot write to file"));
+ }
+}
+
+FMT_FUNC void report_error(format_func func, int error_code,
+ string_view message) FMT_NOEXCEPT {
memory_buffer full_message;
func(full_message, error_code, message);
- // Use Writer::data instead of Writer::c_str to avoid potential memory
- // allocation.
- std::fwrite(full_message.data(), full_message.size(), 1, stderr);
+ // Don't use fwrite_fully because the latter may throw.
+ (void)std::fwrite(full_message.data(), full_message.size(), 1, stderr);
std::fputc('\n', stderr);
}
-} // namespace
-
-FMT_FUNC size_t internal::count_code_points(basic_string_view<char8_t> s) {
- const char8_t *data = s.data();
- size_t num_code_points = 0;
- for (size_t i = 0, size = s.size(); i != size; ++i) {
- if ((data[i] & 0xc0) != 0x80)
- ++num_code_points;
- }
- return num_code_points;
-}
+} // namespace internal
#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)
namespace internal {
template <typename Locale>
-locale_ref::locale_ref(const Locale &loc) : locale_(&loc) {
+locale_ref::locale_ref(const Locale& loc) : locale_(&loc) {
static_assert(std::is_same<Locale, std::locale>::value, "");
}
-template <typename Locale>
-Locale locale_ref::get() const {
+template <typename Locale> Locale locale_ref::get() const {
static_assert(std::is_same<Locale, std::locale>::value, "");
return locale_ ? *static_cast<const std::locale*>(locale_) : std::locale();
}
-template <typename Char>
-FMT_FUNC Char thousands_sep_impl(locale_ref loc) {
- return std::use_facet<std::numpunct<Char> >(
- loc.get<std::locale>()).thousands_sep();
+template <typename Char> FMT_FUNC Char thousands_sep_impl(locale_ref loc) {
+ return std::use_facet<std::numpunct<Char>>(loc.get<std::locale>())
+ .thousands_sep();
}
+template <typename Char> FMT_FUNC Char decimal_point_impl(locale_ref loc) {
+ return std::use_facet<std::numpunct<Char>>(loc.get<std::locale>())
+ .decimal_point();
}
+} // namespace internal
#else
template <typename Char>
FMT_FUNC Char internal::thousands_sep_impl(locale_ref) {
return FMT_STATIC_THOUSANDS_SEPARATOR;
}
+template <typename Char>
+FMT_FUNC Char internal::decimal_point_impl(locale_ref) {
+ return '.';
+}
#endif
-FMT_FUNC void system_error::init(
- int err_code, string_view format_str, format_args args) {
+FMT_API FMT_FUNC format_error::~format_error() FMT_NOEXCEPT {}
+FMT_API FMT_FUNC system_error::~system_error() FMT_NOEXCEPT {}
+
+FMT_FUNC void system_error::init(int err_code, string_view format_str,
+ format_args args) {
error_code_ = err_code;
memory_buffer buffer;
format_system_error(buffer, err_code, vformat(format_str, args));
- std::runtime_error &base = *this;
+ std::runtime_error& base = *this;
base = std::runtime_error(to_string(buffer));
}
namespace internal {
-template <typename T>
-int char_traits<char>::format_float(
- char *buf, std::size_t size, const char *format, int precision, T value) {
- return precision < 0 ?
- FMT_SNPRINTF(buf, size, format, value) :
- FMT_SNPRINTF(buf, size, format, precision, value);
+
+template <> FMT_FUNC int count_digits<4>(internal::fallback_uintptr n) {
+ // Assume little endian; pointer formatting is implementation-defined anyway.
+ int i = static_cast<int>(sizeof(void*)) - 1;
+ while (i > 0 && n.value[i] == 0) --i;
+ auto char_digits = std::numeric_limits<unsigned char>::digits / 4;
+ return i >= 0 ? i * char_digits + count_digits<4, unsigned>(n.value[i]) : 1;
}
template <typename T>
-int char_traits<wchar_t>::format_float(
- wchar_t *buf, std::size_t size, const wchar_t *format, int precision,
- T value) {
- return precision < 0 ?
- FMT_SWPRINTF(buf, size, format, value) :
- FMT_SWPRINTF(buf, size, format, precision, value);
+int format_float(char* buf, std::size_t size, const char* format, int precision,
+ T value) {
+#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
+ if (precision > 100000)
+ throw std::runtime_error(
+ "fuzz mode - avoid large allocation inside snprintf");
+#endif
+ // Suppress the warning about nonliteral format string.
+ auto snprintf_ptr = FMT_SNPRINTF;
+ return precision < 0 ? snprintf_ptr(buf, size, format, value)
+ : snprintf_ptr(buf, size, format, precision, value);
}
template <typename T>
-const char basic_data<T>::DIGITS[] =
+const char basic_data<T>::digits[] =
"0001020304050607080910111213141516171819"
"2021222324252627282930313233343536373839"
"4041424344454647484950515253545556575859"
"6061626364656667686970717273747576777879"
"8081828384858687888990919293949596979899";
-#define FMT_POWERS_OF_10(factor) \
- factor * 10, \
- factor * 100, \
- factor * 1000, \
- factor * 10000, \
- factor * 100000, \
- factor * 1000000, \
- factor * 10000000, \
- factor * 100000000, \
- factor * 1000000000
+template <typename T>
+const char basic_data<T>::hex_digits[] = "0123456789abcdef";
+
+#define FMT_POWERS_OF_10(factor) \
+ factor * 10, factor * 100, factor * 1000, factor * 10000, factor * 100000, \
+ factor * 1000000, factor * 10000000, factor * 100000000, \
+ factor * 1000000000
template <typename T>
-const uint32_t basic_data<T>::POWERS_OF_10_32[] = {
- 1, FMT_POWERS_OF_10(1)
-};
+const uint64_t basic_data<T>::powers_of_10_64[] = {
+ 1, FMT_POWERS_OF_10(1), FMT_POWERS_OF_10(1000000000ull),
+ 10000000000000000000ull};
template <typename T>
-const uint32_t basic_data<T>::ZERO_OR_POWERS_OF_10_32[] = {
- 0, FMT_POWERS_OF_10(1)
-};
+const uint32_t basic_data<T>::zero_or_powers_of_10_32[] = {0,
+ FMT_POWERS_OF_10(1)};
template <typename T>
-const uint64_t basic_data<T>::ZERO_OR_POWERS_OF_10_64[] = {
- 0,
- FMT_POWERS_OF_10(1),
- FMT_POWERS_OF_10(1000000000ull),
- 10000000000000000000ull
-};
+const uint64_t basic_data<T>::zero_or_powers_of_10_64[] = {
+ 0, FMT_POWERS_OF_10(1), FMT_POWERS_OF_10(1000000000ull),
+ 10000000000000000000ull};
// Normalized 64-bit significands of pow(10, k), for k = -348, -340, ..., 340.
// These are generated by support/compute-powers.py.
template <typename T>
-const uint64_t basic_data<T>::POW10_SIGNIFICANDS[] = {
- 0xfa8fd5a0081c0288, 0xbaaee17fa23ebf76, 0x8b16fb203055ac76,
- 0xcf42894a5dce35ea, 0x9a6bb0aa55653b2d, 0xe61acf033d1a45df,
- 0xab70fe17c79ac6ca, 0xff77b1fcbebcdc4f, 0xbe5691ef416bd60c,
- 0x8dd01fad907ffc3c, 0xd3515c2831559a83, 0x9d71ac8fada6c9b5,
- 0xea9c227723ee8bcb, 0xaecc49914078536d, 0x823c12795db6ce57,
- 0xc21094364dfb5637, 0x9096ea6f3848984f, 0xd77485cb25823ac7,
- 0xa086cfcd97bf97f4, 0xef340a98172aace5, 0xb23867fb2a35b28e,
- 0x84c8d4dfd2c63f3b, 0xc5dd44271ad3cdba, 0x936b9fcebb25c996,
- 0xdbac6c247d62a584, 0xa3ab66580d5fdaf6, 0xf3e2f893dec3f126,
- 0xb5b5ada8aaff80b8, 0x87625f056c7c4a8b, 0xc9bcff6034c13053,
- 0x964e858c91ba2655, 0xdff9772470297ebd, 0xa6dfbd9fb8e5b88f,
- 0xf8a95fcf88747d94, 0xb94470938fa89bcf, 0x8a08f0f8bf0f156b,
- 0xcdb02555653131b6, 0x993fe2c6d07b7fac, 0xe45c10c42a2b3b06,
- 0xaa242499697392d3, 0xfd87b5f28300ca0e, 0xbce5086492111aeb,
- 0x8cbccc096f5088cc, 0xd1b71758e219652c, 0x9c40000000000000,
- 0xe8d4a51000000000, 0xad78ebc5ac620000, 0x813f3978f8940984,
- 0xc097ce7bc90715b3, 0x8f7e32ce7bea5c70, 0xd5d238a4abe98068,
- 0x9f4f2726179a2245, 0xed63a231d4c4fb27, 0xb0de65388cc8ada8,
- 0x83c7088e1aab65db, 0xc45d1df942711d9a, 0x924d692ca61be758,
- 0xda01ee641a708dea, 0xa26da3999aef774a, 0xf209787bb47d6b85,
- 0xb454e4a179dd1877, 0x865b86925b9bc5c2, 0xc83553c5c8965d3d,
- 0x952ab45cfa97a0b3, 0xde469fbd99a05fe3, 0xa59bc234db398c25,
- 0xf6c69a72a3989f5c, 0xb7dcbf5354e9bece, 0x88fcf317f22241e2,
- 0xcc20ce9bd35c78a5, 0x98165af37b2153df, 0xe2a0b5dc971f303a,
- 0xa8d9d1535ce3b396, 0xfb9b7cd9a4a7443c, 0xbb764c4ca7a44410,
- 0x8bab8eefb6409c1a, 0xd01fef10a657842c, 0x9b10a4e5e9913129,
- 0xe7109bfba19c0c9d, 0xac2820d9623bf429, 0x80444b5e7aa7cf85,
- 0xbf21e44003acdd2d, 0x8e679c2f5e44ff8f, 0xd433179d9c8cb841,
- 0x9e19db92b4e31ba9, 0xeb96bf6ebadf77d9, 0xaf87023b9bf0ee6b,
+const uint64_t basic_data<T>::pow10_significands[] = {
+ 0xfa8fd5a0081c0288, 0xbaaee17fa23ebf76, 0x8b16fb203055ac76,
+ 0xcf42894a5dce35ea, 0x9a6bb0aa55653b2d, 0xe61acf033d1a45df,
+ 0xab70fe17c79ac6ca, 0xff77b1fcbebcdc4f, 0xbe5691ef416bd60c,
+ 0x8dd01fad907ffc3c, 0xd3515c2831559a83, 0x9d71ac8fada6c9b5,
+ 0xea9c227723ee8bcb, 0xaecc49914078536d, 0x823c12795db6ce57,
+ 0xc21094364dfb5637, 0x9096ea6f3848984f, 0xd77485cb25823ac7,
+ 0xa086cfcd97bf97f4, 0xef340a98172aace5, 0xb23867fb2a35b28e,
+ 0x84c8d4dfd2c63f3b, 0xc5dd44271ad3cdba, 0x936b9fcebb25c996,
+ 0xdbac6c247d62a584, 0xa3ab66580d5fdaf6, 0xf3e2f893dec3f126,
+ 0xb5b5ada8aaff80b8, 0x87625f056c7c4a8b, 0xc9bcff6034c13053,
+ 0x964e858c91ba2655, 0xdff9772470297ebd, 0xa6dfbd9fb8e5b88f,
+ 0xf8a95fcf88747d94, 0xb94470938fa89bcf, 0x8a08f0f8bf0f156b,
+ 0xcdb02555653131b6, 0x993fe2c6d07b7fac, 0xe45c10c42a2b3b06,
+ 0xaa242499697392d3, 0xfd87b5f28300ca0e, 0xbce5086492111aeb,
+ 0x8cbccc096f5088cc, 0xd1b71758e219652c, 0x9c40000000000000,
+ 0xe8d4a51000000000, 0xad78ebc5ac620000, 0x813f3978f8940984,
+ 0xc097ce7bc90715b3, 0x8f7e32ce7bea5c70, 0xd5d238a4abe98068,
+ 0x9f4f2726179a2245, 0xed63a231d4c4fb27, 0xb0de65388cc8ada8,
+ 0x83c7088e1aab65db, 0xc45d1df942711d9a, 0x924d692ca61be758,
+ 0xda01ee641a708dea, 0xa26da3999aef774a, 0xf209787bb47d6b85,
+ 0xb454e4a179dd1877, 0x865b86925b9bc5c2, 0xc83553c5c8965d3d,
+ 0x952ab45cfa97a0b3, 0xde469fbd99a05fe3, 0xa59bc234db398c25,
+ 0xf6c69a72a3989f5c, 0xb7dcbf5354e9bece, 0x88fcf317f22241e2,
+ 0xcc20ce9bd35c78a5, 0x98165af37b2153df, 0xe2a0b5dc971f303a,
+ 0xa8d9d1535ce3b396, 0xfb9b7cd9a4a7443c, 0xbb764c4ca7a44410,
+ 0x8bab8eefb6409c1a, 0xd01fef10a657842c, 0x9b10a4e5e9913129,
+ 0xe7109bfba19c0c9d, 0xac2820d9623bf429, 0x80444b5e7aa7cf85,
+ 0xbf21e44003acdd2d, 0x8e679c2f5e44ff8f, 0xd433179d9c8cb841,
+ 0x9e19db92b4e31ba9, 0xeb96bf6ebadf77d9, 0xaf87023b9bf0ee6b,
};
// Binary exponents of pow(10, k), for k = -348, -340, ..., 340, corresponding
// to significands above.
template <typename T>
-const int16_t basic_data<T>::POW10_EXPONENTS[] = {
- -1220, -1193, -1166, -1140, -1113, -1087, -1060, -1034, -1007, -980, -954,
- -927, -901, -874, -847, -821, -794, -768, -741, -715, -688, -661,
- -635, -608, -582, -555, -529, -502, -475, -449, -422, -396, -369,
- -343, -316, -289, -263, -236, -210, -183, -157, -130, -103, -77,
- -50, -24, 3, 30, 56, 83, 109, 136, 162, 189, 216,
- 242, 269, 295, 322, 348, 375, 402, 428, 455, 481, 508,
- 534, 561, 588, 614, 641, 667, 694, 720, 747, 774, 800,
- 827, 853, 880, 907, 933, 960, 986, 1013, 1039, 1066
-};
+const int16_t basic_data<T>::pow10_exponents[] = {
+ -1220, -1193, -1166, -1140, -1113, -1087, -1060, -1034, -1007, -980, -954,
+ -927, -901, -874, -847, -821, -794, -768, -741, -715, -688, -661,
+ -635, -608, -582, -555, -529, -502, -475, -449, -422, -396, -369,
+ -343, -316, -289, -263, -236, -210, -183, -157, -130, -103, -77,
+ -50, -24, 3, 30, 56, 83, 109, 136, 162, 189, 216,
+ 242, 269, 295, 322, 348, 375, 402, 428, 455, 481, 508,
+ 534, 561, 588, 614, 641, 667, 694, 720, 747, 774, 800,
+ 827, 853, 880, 907, 933, 960, 986, 1013, 1039, 1066};
-template <typename T> const char basic_data<T>::FOREGROUND_COLOR[] = "\x1b[38;2;";
-template <typename T> const char basic_data<T>::BACKGROUND_COLOR[] = "\x1b[48;2;";
-template <typename T> const char basic_data<T>::RESET_COLOR[] = "\x1b[0m";
-template <typename T> const wchar_t basic_data<T>::WRESET_COLOR[] = L"\x1b[0m";
+template <typename T>
+const char basic_data<T>::foreground_color[] = "\x1b[38;2;";
+template <typename T>
+const char basic_data<T>::background_color[] = "\x1b[48;2;";
+template <typename T> const char basic_data<T>::reset_color[] = "\x1b[0m";
+template <typename T> const wchar_t basic_data<T>::wreset_color[] = L"\x1b[0m";
+
+template <typename T> struct bits {
+ static FMT_CONSTEXPR_DECL const int value =
+ static_cast<int>(sizeof(T) * std::numeric_limits<unsigned char>::digits);
+};
// A handmade floating-point number f * pow(2, e).
class fp {
private:
- typedef uint64_t significand_type;
+ using significand_type = uint64_t;
// All sizes are in bits.
- static FMT_CONSTEXPR_DECL const int char_size =
- std::numeric_limits<unsigned char>::digits;
// Subtract 1 to account for an implicit most significant bit in the
// normalized form.
static FMT_CONSTEXPR_DECL const int double_significand_size =
- std::numeric_limits<double>::digits - 1;
+ std::numeric_limits<double>::digits - 1;
static FMT_CONSTEXPR_DECL const uint64_t implicit_bit =
- 1ull << double_significand_size;
+ 1ull << double_significand_size;
public:
significand_type f;
int e;
static FMT_CONSTEXPR_DECL const int significand_size =
- sizeof(significand_type) * char_size;
+ bits<significand_type>::value;
- fp(): f(0), e(0) {}
- fp(uint64_t f_val, int e_val): f(f_val), e(e_val) {}
+ fp() : f(0), e(0) {}
+ fp(uint64_t f_val, int e_val) : f(f_val), e(e_val) {}
// Constructs fp from an IEEE754 double. It is a template to prevent compile
// errors on platforms where double is not IEEE754.
- template <typename Double>
- explicit fp(Double d) {
+ template <typename Double> explicit fp(Double d) {
// Assume double is in the format [sign][exponent][significand].
- typedef std::numeric_limits<Double> limits;
- const int double_size = static_cast<int>(sizeof(Double) * char_size);
+ using limits = std::numeric_limits<Double>;
const int exponent_size =
- double_size - double_significand_size - 1; // -1 for sign
+ bits<Double>::value - double_significand_size - 1; // -1 for sign
const uint64_t significand_mask = implicit_bit - 1;
const uint64_t exponent_mask = (~0ull >> 1) & ~significand_mask;
const int exponent_bias = (1 << exponent_size) - limits::max_exponent - 1;
}
// Normalizes the value converted from double and multiplied by (1 << SHIFT).
- template <int SHIFT = 0>
- void normalize() {
+ template <int SHIFT = 0> void normalize() {
// Handle subnormals.
auto shifted_implicit_bit = implicit_bit << SHIFT;
while ((f & shifted_implicit_bit) == 0) {
// a boundary is a value half way between the number and its predecessor
// (lower) or successor (upper). The upper boundary is normalized and lower
// has the same exponent but may be not normalized.
- void compute_boundaries(fp &lower, fp &upper) const {
- lower = f == implicit_bit ?
- fp((f << 2) - 1, e - 2) : fp((f << 1) - 1, e - 1);
+ void compute_boundaries(fp& lower, fp& upper) const {
+ lower =
+ f == implicit_bit ? fp((f << 2) - 1, e - 2) : fp((f << 1) - 1, e - 1);
upper = fp((f << 1) + 1, e - 1);
upper.normalize<1>(); // 1 is to account for the exponent shift above.
lower.f <<= lower.e - upper.e;
}
// Computes an fp number r with r.f = x.f * y.f / pow(2, 64) rounded to nearest
-// with half-up tie breaking, r.e = x.e + y.e + 64. Result may not be normalized.
-FMT_API fp operator*(fp x, fp y);
-
-// Returns cached power (of 10) c_k = c_k.f * pow(2, c_k.e) such that its
-// (binary) exponent satisfies min_exponent <= c_k.e <= min_exponent + 3.
-FMT_API fp get_cached_power(int min_exponent, int &pow10_exponent);
-
+// with half-up tie breaking, r.e = x.e + y.e + 64. Result may not be
+// normalized.
FMT_FUNC fp operator*(fp x, fp y) {
+ int exp = x.e + y.e + 64;
+#if FMT_USE_INT128
+ auto product = static_cast<__uint128_t>(x.f) * y.f;
+ auto f = static_cast<uint64_t>(product >> 64);
+ if ((static_cast<uint64_t>(product) & (1ULL << 63)) != 0) ++f;
+ return fp(f, exp);
+#else
// Multiply 32-bit parts of significands.
uint64_t mask = (1ULL << 32) - 1;
uint64_t a = x.f >> 32, b = x.f & mask;
uint64_t ac = a * c, bc = b * c, ad = a * d, bd = b * d;
// Compute mid 64-bit of result and round.
uint64_t mid = (bd >> 32) + (ad & mask) + (bc & mask) + (1U << 31);
- return fp(ac + (ad >> 32) + (bc >> 32) + (mid >> 32), x.e + y.e + 64);
+ return fp(ac + (ad >> 32) + (bc >> 32) + (mid >> 32), exp);
+#endif
}
-FMT_FUNC fp get_cached_power(int min_exponent, int &pow10_exponent) {
+// Returns cached power (of 10) c_k = c_k.f * pow(2, c_k.e) such that its
+// (binary) exponent satisfies min_exponent <= c_k.e <= min_exponent + 28.
+FMT_FUNC fp get_cached_power(int min_exponent, int& pow10_exponent) {
const double one_over_log2_10 = 0.30102999566398114; // 1 / log2(10)
- int index = static_cast<int>(std::ceil(
- (min_exponent + fp::significand_size - 1) * one_over_log2_10));
+ int index = static_cast<int>(
+ std::ceil((min_exponent + fp::significand_size - 1) * one_over_log2_10));
// Decimal exponent of the first (smallest) cached power of 10.
const int first_dec_exp = -348;
// Difference between 2 consecutive decimal exponents in cached powers of 10.
const int dec_exp_step = 8;
index = (index - first_dec_exp - 1) / dec_exp_step + 1;
pow10_exponent = first_dec_exp + index * dec_exp_step;
- return fp(data::POW10_SIGNIFICANDS[index], data::POW10_EXPONENTS[index]);
+ return fp(data::pow10_significands[index], data::pow10_exponents[index]);
+}
+
+enum round_direction { unknown, up, down };
+
+// Given the divisor (normally a power of 10), the remainder = v % divisor for
+// some number v and the error, returns whether v should be rounded up, down, or
+// whether the rounding direction can't be determined due to error.
+// error should be less than divisor / 2.
+inline round_direction get_round_direction(uint64_t divisor, uint64_t remainder,
+ uint64_t error) {
+ FMT_ASSERT(remainder < divisor, ""); // divisor - remainder won't overflow.
+ FMT_ASSERT(error < divisor, ""); // divisor - error won't overflow.
+ FMT_ASSERT(error < divisor - error, ""); // error * 2 won't overflow.
+ // Round down if (remainder + error) * 2 <= divisor.
+ if (remainder <= divisor - remainder && error * 2 <= divisor - remainder * 2)
+ return down;
+ // Round up if (remainder - error) * 2 >= divisor.
+ if (remainder >= error &&
+ remainder - error >= divisor - (remainder - error)) {
+ return up;
+ }
+ return unknown;
}
-FMT_FUNC bool grisu2_round(
- char *buf, int &size, int max_digits, uint64_t delta,
- uint64_t remainder, uint64_t exp, uint64_t diff, int &exp10) {
- while (remainder < diff && delta - remainder >= exp &&
- (remainder + exp < diff || diff - remainder > remainder + exp - diff)) {
- --buf[size - 1];
- remainder += exp;
- }
- if (size > max_digits) {
- --size;
- ++exp10;
- if (buf[size] >= '5')
- return false;
- }
- return true;
+namespace digits {
+enum result {
+ more, // Generate more digits.
+ done, // Done generating digits.
+ error // Digit generation cancelled due to an error.
+};
}
-// Generates output using Grisu2 digit-gen algorithm.
-FMT_FUNC bool grisu2_gen_digits(
- char *buf, int &size, uint32_t hi, uint64_t lo, int &exp,
- uint64_t delta, const fp &one, const fp &diff, int max_digits) {
- // Generate digits for the most significant part (hi).
- while (exp > 0) {
+// Generates output using the Grisu digit-gen algorithm.
+// error: the size of the region (lower, upper) outside of which numbers
+// definitely do not round to value (Delta in Grisu3).
+template <typename Handler>
+digits::result grisu_gen_digits(fp value, uint64_t error, int& exp,
+ Handler& handler) {
+ fp one(1ull << -value.e, value.e);
+ // The integral part of scaled value (p1 in Grisu) = value / one. It cannot be
+ // zero because it contains a product of two 64-bit numbers with MSB set (due
+ // to normalization) - 1, shifted right by at most 60 bits.
+ uint32_t integral = static_cast<uint32_t>(value.f >> -one.e);
+ FMT_ASSERT(integral != 0, "");
+ FMT_ASSERT(integral == value.f >> -one.e, "");
+ // The fractional part of scaled value (p2 in Grisu) c = value % one.
+ uint64_t fractional = value.f & (one.f - 1);
+ exp = count_digits(integral); // kappa in Grisu.
+ // Divide by 10 to prevent overflow.
+ auto result = handler.on_start(data::powers_of_10_64[exp - 1] << -one.e,
+ value.f / 10, error * 10, exp);
+ if (result != digits::more) return result;
+ // Generate digits for the integral part. This can produce up to 10 digits.
+ do {
uint32_t digit = 0;
// This optimization by miloyip reduces the number of integer divisions by
// one per iteration.
switch (exp) {
- case 10: digit = hi / 1000000000; hi %= 1000000000; break;
- case 9: digit = hi / 100000000; hi %= 100000000; break;
- case 8: digit = hi / 10000000; hi %= 10000000; break;
- case 7: digit = hi / 1000000; hi %= 1000000; break;
- case 6: digit = hi / 100000; hi %= 100000; break;
- case 5: digit = hi / 10000; hi %= 10000; break;
- case 4: digit = hi / 1000; hi %= 1000; break;
- case 3: digit = hi / 100; hi %= 100; break;
- case 2: digit = hi / 10; hi %= 10; break;
- case 1: digit = hi; hi = 0; break;
+ case 10:
+ digit = integral / 1000000000;
+ integral %= 1000000000;
+ break;
+ case 9:
+ digit = integral / 100000000;
+ integral %= 100000000;
+ break;
+ case 8:
+ digit = integral / 10000000;
+ integral %= 10000000;
+ break;
+ case 7:
+ digit = integral / 1000000;
+ integral %= 1000000;
+ break;
+ case 6:
+ digit = integral / 100000;
+ integral %= 100000;
+ break;
+ case 5:
+ digit = integral / 10000;
+ integral %= 10000;
+ break;
+ case 4:
+ digit = integral / 1000;
+ integral %= 1000;
+ break;
+ case 3:
+ digit = integral / 100;
+ integral %= 100;
+ break;
+ case 2:
+ digit = integral / 10;
+ integral %= 10;
+ break;
+ case 1:
+ digit = integral;
+ integral = 0;
+ break;
default:
FMT_ASSERT(false, "invalid number of digits");
}
- if (digit != 0 || size != 0)
- buf[size++] = static_cast<char>('0' + digit);
--exp;
- uint64_t remainder = (static_cast<uint64_t>(hi) << -one.e) + lo;
- if (remainder <= delta || size > max_digits) {
- return grisu2_round(
- buf, size, max_digits, delta, remainder,
- static_cast<uint64_t>(data::POWERS_OF_10_32[exp]) << -one.e,
- diff.f, exp);
- }
- }
- // Generate digits for the least significant part (lo).
+ uint64_t remainder =
+ (static_cast<uint64_t>(integral) << -one.e) + fractional;
+ result = handler.on_digit(static_cast<char>('0' + digit),
+ data::powers_of_10_64[exp] << -one.e, remainder,
+ error, exp, true);
+ if (result != digits::more) return result;
+ } while (exp > 0);
+ // Generate digits for the fractional part.
for (;;) {
- lo *= 10;
- delta *= 10;
- char digit = static_cast<char>(lo >> -one.e);
- if (digit != 0 || size != 0)
- buf[size++] = static_cast<char>('0' + digit);
- lo &= one.f - 1;
+ fractional *= 10;
+ error *= 10;
+ char digit =
+ static_cast<char>('0' + static_cast<char>(fractional >> -one.e));
+ fractional &= one.f - 1;
--exp;
- if (lo < delta || size > max_digits) {
- return grisu2_round(buf, size, max_digits, delta, lo, one.f,
- diff.f * data::POWERS_OF_10_32[-exp], exp);
- }
+ result = handler.on_digit(digit, one.f, fractional, error, exp, false);
+ if (result != digits::more) return result;
}
}
-#if FMT_CLANG_VERSION
-# define FMT_FALLTHROUGH [[clang::fallthrough]];
-#elif FMT_GCC_VERSION >= 700
-# define FMT_FALLTHROUGH [[gnu::fallthrough]];
-#else
-# define FMT_FALLTHROUGH
-#endif
-
-struct gen_digits_params {
- int num_digits;
+// The fixed precision digit handler.
+struct fixed_handler {
+ char* buf;
+ int size;
+ int precision;
+ int exp10;
bool fixed;
- bool upper;
- bool trailing_zeros;
-};
-
-struct prettify_handler {
- char *data;
- ptrdiff_t size;
- buffer &buf;
-
- explicit prettify_handler(buffer &b, ptrdiff_t n)
- : data(b.data()), size(n), buf(b) {}
- ~prettify_handler() {
- assert(buf.size() >= to_unsigned(size));
- buf.resize(to_unsigned(size));
- }
-
- template <typename F>
- void insert(ptrdiff_t pos, ptrdiff_t n, F f) {
- std::memmove(data + pos + n, data + pos, to_unsigned(size - pos));
- f(data + pos);
- size += n;
- }
- void insert(ptrdiff_t pos, char c) {
- std::memmove(data + pos + 1, data + pos, to_unsigned(size - pos));
- data[pos] = c;
- ++size;
+ digits::result on_start(uint64_t divisor, uint64_t remainder, uint64_t error,
+ int& exp) {
+ // Non-fixed formats require at least one digit and no precision adjustment.
+ if (!fixed) return digits::more;
+ // Adjust fixed precision by exponent because it is relative to decimal
+ // point.
+ precision += exp + exp10;
+ // Check if precision is satisfied just by leading zeros, e.g.
+ // format("{:.2f}", 0.001) gives "0.00" without generating any digits.
+ if (precision > 0) return digits::more;
+ if (precision < 0) return digits::done;
+ auto dir = get_round_direction(divisor, remainder, error);
+ if (dir == unknown) return digits::error;
+ buf[size++] = dir == up ? '1' : '0';
+ return digits::done;
}
- void append(ptrdiff_t n, char c) {
- std::uninitialized_fill_n(data + size, n, c);
- size += n;
- }
-
- void append(char c) { data[size++] = c; }
-
- void remove_trailing(char c) {
- while (data[size - 1] == c) --size;
+ digits::result on_digit(char digit, uint64_t divisor, uint64_t remainder,
+ uint64_t error, int, bool integral) {
+ FMT_ASSERT(remainder < divisor, "");
+ buf[size++] = digit;
+ if (size < precision) return digits::more;
+ if (!integral) {
+ // Check if error * 2 < divisor with overflow prevention.
+ // The check is not needed for the integral part because error = 1
+ // and divisor > (1 << 32) there.
+ if (error >= divisor || error >= divisor - error) return digits::error;
+ } else {
+ FMT_ASSERT(error == 1 && divisor > 2, "");
+ }
+ auto dir = get_round_direction(divisor, remainder, error);
+ if (dir != up) return dir == down ? digits::done : digits::error;
+ ++buf[size - 1];
+ for (int i = size - 1; i > 0 && buf[i] > '9'; --i) {
+ buf[i] = '0';
+ ++buf[i - 1];
+ }
+ if (buf[0] > '9') {
+ buf[0] = '1';
+ buf[size++] = '0';
+ }
+ return digits::done;
}
};
-// Writes the exponent exp in the form "[+-]d{2,3}" to buffer.
-template <typename Handler>
-FMT_FUNC void write_exponent(int exp, Handler &&h) {
- FMT_ASSERT(-1000 < exp && exp < 1000, "exponent out of range");
- if (exp < 0) {
- h.append('-');
- exp = -exp;
- } else {
- h.append('+');
- }
- if (exp >= 100) {
- h.append(static_cast<char>('0' + exp / 100));
- exp %= 100;
- const char *d = data::DIGITS + exp * 2;
- h.append(d[0]);
- h.append(d[1]);
- } else {
- const char *d = data::DIGITS + exp * 2;
- h.append(d[0]);
- h.append(d[1]);
- }
-}
+// The shortest representation digit handler.
+template <int GRISU_VERSION> struct grisu_shortest_handler {
+ char* buf;
+ int size;
+ // Distance between scaled value and upper bound (wp_W in Grisu3).
+ uint64_t diff;
-struct fill {
- size_t n;
- void operator()(char *buf) const {
- buf[0] = '0';
- buf[1] = '.';
- std::uninitialized_fill_n(buf + 2, n, '0');
+ digits::result on_start(uint64_t, uint64_t, uint64_t, int&) {
+ return digits::more;
}
-};
-// The number is given as v = f * pow(10, exp), where f has size digits.
-template <typename Handler>
-FMT_FUNC void grisu2_prettify(const gen_digits_params ¶ms,
- int size, int exp, Handler &&handler) {
- if (!params.fixed) {
- // Insert a decimal point after the first digit and add an exponent.
- handler.insert(1, '.');
- exp += size - 1;
- if (size < params.num_digits)
- handler.append(params.num_digits - size, '0');
- handler.append(params.upper ? 'E' : 'e');
- write_exponent(exp, handler);
- return;
- }
- // pow(10, full_exp - 1) <= v <= pow(10, full_exp).
- int full_exp = size + exp;
- const int exp_threshold = 21;
- if (size <= full_exp && full_exp <= exp_threshold) {
- // 1234e7 -> 12340000000[.0+]
- handler.append(full_exp - size, '0');
- int num_zeros = params.num_digits - full_exp;
- if (num_zeros > 0 && params.trailing_zeros) {
- handler.append('.');
- handler.append(num_zeros, '0');
- }
- } else if (full_exp > 0) {
- // 1234e-2 -> 12.34[0+]
- handler.insert(full_exp, '.');
- if (!params.trailing_zeros) {
- // Remove trailing zeros.
- handler.remove_trailing('0');
- } else if (params.num_digits > size) {
- // Add trailing zeros.
- ptrdiff_t num_zeros = params.num_digits - size;
- handler.append(num_zeros, '0');
+ // Decrement the generated number approaching value from above.
+ void round(uint64_t d, uint64_t divisor, uint64_t& remainder,
+ uint64_t error) {
+ while (
+ remainder < d && error - remainder >= divisor &&
+ (remainder + divisor < d || d - remainder >= remainder + divisor - d)) {
+ --buf[size - 1];
+ remainder += divisor;
}
- } else {
- // 1234e-6 -> 0.001234
- handler.insert(0, 2 - full_exp, fill{to_unsigned(-full_exp)});
}
-}
-struct char_counter {
- ptrdiff_t size;
-
- template <typename F>
- void insert(ptrdiff_t, ptrdiff_t n, F) { size += n; }
- void insert(ptrdiff_t, char) { ++size; }
- void append(ptrdiff_t n, char) { size += n; }
- void append(char) { ++size; }
- void remove_trailing(char) {}
-};
-
-// Converts format specifiers into parameters for digit generation and computes
-// output buffer size for a number in the range [pow(10, exp - 1), pow(10, exp)
-// or 0 if exp == 1.
-FMT_FUNC gen_digits_params process_specs(const core_format_specs &specs,
- int exp, buffer &buf) {
- auto params = gen_digits_params();
- int num_digits = specs.precision >= 0 ? specs.precision : 6;
- switch (specs.type) {
- case 'G':
- params.upper = true;
- FMT_FALLTHROUGH
- case '\0': case 'g':
- params.trailing_zeros = (specs.flags & HASH_FLAG) != 0;
- if (-4 <= exp && exp < num_digits + 1) {
- params.fixed = true;
- if (!specs.type && params.trailing_zeros && exp >= 0)
- num_digits = exp + 1;
+ // Implements Grisu's round_weed.
+ digits::result on_digit(char digit, uint64_t divisor, uint64_t remainder,
+ uint64_t error, int exp, bool integral) {
+ buf[size++] = digit;
+ if (remainder >= error) return digits::more;
+ if (GRISU_VERSION != 3) {
+ uint64_t d = integral ? diff : diff * data::powers_of_10_64[-exp];
+ round(d, divisor, remainder, error);
+ return digits::done;
}
- break;
- case 'F':
- params.upper = true;
- FMT_FALLTHROUGH
- case 'f': {
- params.fixed = true;
- params.trailing_zeros = true;
- int adjusted_min_digits = num_digits + exp;
- if (adjusted_min_digits > 0)
- num_digits = adjusted_min_digits;
- break;
- }
- case 'E':
- params.upper = true;
- FMT_FALLTHROUGH
- case 'e':
- ++num_digits;
- break;
+ uint64_t unit = integral ? 1 : data::powers_of_10_64[-exp];
+ uint64_t up = (diff - 1) * unit; // wp_Wup
+ round(up, divisor, remainder, error);
+ uint64_t down = (diff + 1) * unit; // wp_Wdown
+ if (remainder < down && error - remainder >= divisor &&
+ (remainder + divisor < down ||
+ down - remainder > remainder + divisor - down)) {
+ return digits::error;
+ }
+ return 2 * unit <= remainder && remainder <= error - 4 * unit
+ ? digits::done
+ : digits::error;
}
- params.num_digits = num_digits;
- char_counter counter{num_digits};
- grisu2_prettify(params, params.num_digits, exp - num_digits, counter);
- buf.resize(to_unsigned(counter.size));
- return params;
-}
+};
-template <typename Double>
-FMT_FUNC typename std::enable_if<sizeof(Double) == sizeof(uint64_t), bool>::type
- grisu2_format(Double value, buffer &buf, core_format_specs specs) {
+template <typename Double,
+ enable_if_t<(sizeof(Double) == sizeof(uint64_t)), int>>
+FMT_API bool grisu_format(Double value, buffer<char>& buf, int precision,
+ unsigned options, int& exp) {
FMT_ASSERT(value >= 0, "value is negative");
- if (value == 0) {
- gen_digits_params params = process_specs(specs, 1, buf);
- const size_t size = 1;
- buf[0] = '0';
- grisu2_prettify(params, size, 0, prettify_handler(buf, size));
+ bool fixed = (options & grisu_options::fixed) != 0;
+ if (value <= 0) { // <= instead of == to silence a warning.
+ if (precision <= 0 || !fixed) {
+ exp = 0;
+ buf.push_back('0');
+ } else {
+ exp = -precision;
+ buf.resize(precision);
+ std::uninitialized_fill_n(buf.data(), precision, '0');
+ }
return true;
}
fp fp_value(value);
- fp lower, upper; // w^- and w^+ in the Grisu paper.
- fp_value.compute_boundaries(lower, upper);
-
- // Find a cached power of 10 close to 1 / upper and use it to scale upper.
const int min_exp = -60; // alpha in Grisu.
- int cached_exp = 0; // K in Grisu.
- auto cached_pow = get_cached_power( // \tilde{c}_{-k} in Grisu.
- min_exp - (upper.e + fp::significand_size), cached_exp);
- cached_exp = -cached_exp;
- upper = upper * cached_pow; // \tilde{M}^+ in Grisu.
- --upper.f; // \tilde{M}^+ - 1 ulp -> M^+_{\downarrow}.
- fp one(1ull << -upper.e, upper.e);
- // hi (p1 in Grisu) contains the most significant digits of scaled_upper.
- // hi = floor(upper / one).
- uint32_t hi = static_cast<uint32_t>(upper.f >> -one.e);
- int exp = count_digits(hi); // kappa in Grisu.
- gen_digits_params params = process_specs(specs, cached_exp + exp, buf);
- fp_value.normalize();
- fp scaled_value = fp_value * cached_pow;
- lower = lower * cached_pow; // \tilde{M}^- in Grisu.
- ++lower.f; // \tilde{M}^- + 1 ulp -> M^-_{\uparrow}.
- uint64_t delta = upper.f - lower.f;
- fp diff = upper - scaled_value; // wp_w in Grisu.
- // lo (p2 in Grisu) contains the least significants digits of scaled_upper.
- // lo = supper % one.
- uint64_t lo = upper.f & (one.f - 1);
- int size = 0;
- if (!grisu2_gen_digits(buf.data(), size, hi, lo, exp, delta, one, diff,
- params.num_digits)) {
- buf.clear();
- return false;
+ int cached_exp10 = 0; // K in Grisu.
+ if (precision != -1) {
+ if (precision > 17) return false;
+ fp_value.normalize();
+ auto cached_pow = get_cached_power(
+ min_exp - (fp_value.e + fp::significand_size), cached_exp10);
+ fp_value = fp_value * cached_pow;
+ fixed_handler handler{buf.data(), 0, precision, -cached_exp10, fixed};
+ if (grisu_gen_digits(fp_value, 1, exp, handler) == digits::error)
+ return false;
+ buf.resize(to_unsigned(handler.size));
+ } else {
+ fp lower, upper; // w^- and w^+ in the Grisu paper.
+ fp_value.compute_boundaries(lower, upper);
+ // Find a cached power of 10 such that multiplying upper by it will bring
+ // the exponent in the range [min_exp, -32].
+ auto cached_pow = get_cached_power( // \tilde{c}_{-k} in Grisu.
+ min_exp - (upper.e + fp::significand_size), cached_exp10);
+ fp_value.normalize();
+ fp_value = fp_value * cached_pow;
+ lower = lower * cached_pow; // \tilde{M}^- in Grisu.
+ upper = upper * cached_pow; // \tilde{M}^+ in Grisu.
+ assert(min_exp <= upper.e && upper.e <= -32);
+ auto result = digits::result();
+ int size = 0;
+ if ((options & grisu_options::grisu3) != 0) {
+ --lower.f; // \tilde{M}^- - 1 ulp -> M^-_{\downarrow}.
+ ++upper.f; // \tilde{M}^+ + 1 ulp -> M^+_{\uparrow}.
+ // Numbers outside of (lower, upper) definitely do not round to value.
+ grisu_shortest_handler<3> handler{buf.data(), 0, (upper - fp_value).f};
+ result = grisu_gen_digits(upper, upper.f - lower.f, exp, handler);
+ size = handler.size;
+ } else {
+ ++lower.f; // \tilde{M}^- + 1 ulp -> M^-_{\uparrow}.
+ --upper.f; // \tilde{M}^+ - 1 ulp -> M^+_{\downarrow}.
+ grisu_shortest_handler<2> handler{buf.data(), 0, (upper - fp_value).f};
+ result = grisu_gen_digits(upper, upper.f - lower.f, exp, handler);
+ size = handler.size;
+ }
+ if (result == digits::error) return false;
+ buf.resize(to_unsigned(size));
}
- grisu2_prettify(params, size, cached_exp + exp, prettify_handler(buf, size));
+ exp -= cached_exp10;
return true;
}
template <typename Double>
-void sprintf_format(Double value, internal::buffer &buf,
- core_format_specs spec) {
+char* sprintf_format(Double value, internal::buffer<char>& buf,
+ sprintf_specs specs) {
// Buffer capacity must be non-zero, otherwise MSVC's vsnprintf_s will fail.
FMT_ASSERT(buf.capacity() != 0, "empty buffer");
// Build format string.
- enum { MAX_FORMAT_SIZE = 10}; // longest format: %#-*.*Lg
- char format[MAX_FORMAT_SIZE];
- char *format_ptr = format;
+ enum { max_format_size = 10 }; // longest format: %#-*.*Lg
+ char format[max_format_size];
+ char* format_ptr = format;
*format_ptr++ = '%';
- if (spec.has(HASH_FLAG))
- *format_ptr++ = '#';
- if (spec.precision >= 0) {
+ if (specs.alt || !specs.type) *format_ptr++ = '#';
+ if (specs.precision >= 0) {
*format_ptr++ = '.';
*format_ptr++ = '*';
}
- if (std::is_same<Double, long double>::value)
- *format_ptr++ = 'L';
- *format_ptr++ = spec.type;
+ if (std::is_same<Double, long double>::value) *format_ptr++ = 'L';
+
+ char type = specs.type;
+
+ if (type == '%')
+ type = 'f';
+ else if (type == 0 || type == 'n')
+ type = 'g';
+#if FMT_MSC_VER
+ if (type == 'F') {
+ // MSVC's printf doesn't support 'F'.
+ type = 'f';
+ }
+#endif
+ *format_ptr++ = type;
*format_ptr = '\0';
// Format using snprintf.
- char *start = FMT_NULL;
+ char* start = nullptr;
+ char* decimal_point_pos = nullptr;
for (;;) {
std::size_t buffer_size = buf.capacity();
start = &buf[0];
- int result = internal::char_traits<char>::format_float(
- start, buffer_size, format, spec.precision, value);
+ int result =
+ format_float(start, buffer_size, format, specs.precision, value);
if (result >= 0) {
unsigned n = internal::to_unsigned(result);
if (n < buf.capacity()) {
+ // Find the decimal point.
+ auto p = buf.data(), end = p + n;
+ if (*p == '+' || *p == '-') ++p;
+ if (specs.type != 'a' && specs.type != 'A') {
+ while (p < end && *p >= '0' && *p <= '9') ++p;
+ if (p < end && *p != 'e' && *p != 'E') {
+ decimal_point_pos = p;
+ if (!specs.type) {
+ // Keep only one trailing zero after the decimal point.
+ ++p;
+ if (*p == '0') ++p;
+ while (p != end && *p >= '1' && *p <= '9') ++p;
+ char* where = p;
+ while (p != end && *p == '0') ++p;
+ if (p == end || *p < '0' || *p > '9') {
+ if (p != end) std::memmove(where, p, to_unsigned(end - p));
+ n -= static_cast<unsigned>(p - where);
+ }
+ }
+ }
+ }
buf.resize(n);
break; // The buffer is large enough - continue with formatting.
}
buf.reserve(buf.capacity() + 1);
}
}
+ return decimal_point_pos;
}
} // namespace internal
return;
}
- int length = MultiByteToWideChar(
- CP_UTF8, MB_ERR_INVALID_CHARS, s.data(), s_size, FMT_NULL, 0);
- if (length == 0)
- FMT_THROW(windows_error(GetLastError(), ERROR_MSG));
+ int length = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, s.data(),
+ s_size, nullptr, 0);
+ if (length == 0) FMT_THROW(windows_error(GetLastError(), ERROR_MSG));
buffer_.resize(length + 1);
- length = MultiByteToWideChar(
- CP_UTF8, MB_ERR_INVALID_CHARS, s.data(), s_size, &buffer_[0], length);
- if (length == 0)
- FMT_THROW(windows_error(GetLastError(), ERROR_MSG));
+ length = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, s.data(), s_size,
+ &buffer_[0], length);
+ if (length == 0) FMT_THROW(windows_error(GetLastError(), ERROR_MSG));
buffer_[length] = 0;
}
FMT_FUNC internal::utf16_to_utf8::utf16_to_utf8(wstring_view s) {
if (int error_code = convert(s)) {
FMT_THROW(windows_error(error_code,
- "cannot convert string from UTF-16 to UTF-8"));
+ "cannot convert string from UTF-16 to UTF-8"));
}
}
FMT_FUNC int internal::utf16_to_utf8::convert(wstring_view s) {
- if (s.size() > INT_MAX)
- return ERROR_INVALID_PARAMETER;
+ if (s.size() > INT_MAX) return ERROR_INVALID_PARAMETER;
int s_size = static_cast<int>(s.size());
if (s_size == 0) {
// WideCharToMultiByte does not support zero length, handle separately.
return 0;
}
- int length = WideCharToMultiByte(
- CP_UTF8, 0, s.data(), s_size, FMT_NULL, 0, FMT_NULL, FMT_NULL);
- if (length == 0)
- return GetLastError();
+ int length = WideCharToMultiByte(CP_UTF8, 0, s.data(), s_size, nullptr, 0,
+ nullptr, nullptr);
+ if (length == 0) return GetLastError();
buffer_.resize(length + 1);
- length = WideCharToMultiByte(
- CP_UTF8, 0, s.data(), s_size, &buffer_[0], length, FMT_NULL, FMT_NULL);
- if (length == 0)
- return GetLastError();
+ length = WideCharToMultiByte(CP_UTF8, 0, s.data(), s_size, &buffer_[0],
+ length, nullptr, nullptr);
+ if (length == 0) return GetLastError();
buffer_[length] = 0;
return 0;
}
-FMT_FUNC void windows_error::init(
- int err_code, string_view format_str, format_args args) {
+FMT_FUNC void windows_error::init(int err_code, string_view format_str,
+ format_args args) {
error_code_ = err_code;
memory_buffer buffer;
internal::format_windows_error(buffer, err_code, vformat(format_str, args));
- std::runtime_error &base = *this;
+ std::runtime_error& base = *this;
base = std::runtime_error(to_string(buffer));
}
-FMT_FUNC void internal::format_windows_error(
- internal::buffer &out, int error_code, string_view message) FMT_NOEXCEPT {
+FMT_FUNC void internal::format_windows_error(internal::buffer<char>& out,
+ int error_code,
+ string_view message) FMT_NOEXCEPT {
FMT_TRY {
wmemory_buffer buf;
buf.resize(inline_buffer_size);
for (;;) {
- wchar_t *system_message = &buf[0];
+ wchar_t* system_message = &buf[0];
int result = FormatMessageW(
- FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
- FMT_NULL, error_code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
- system_message, static_cast<uint32_t>(buf.size()), FMT_NULL);
+ FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, nullptr,
+ error_code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), system_message,
+ static_cast<uint32_t>(buf.size()), nullptr);
if (result != 0) {
utf16_to_utf8 utf8_message;
if (utf8_message.convert(system_message) == ERROR_SUCCESS) {
- writer w(out);
+ internal::writer w(out);
w.write(message);
w.write(": ");
w.write(utf8_message);
break; // Can't get error message, report error code instead.
buf.resize(buf.size() * 2);
}
- } FMT_CATCH(...) {}
+ }
+ FMT_CATCH(...) {}
format_error_code(out, error_code, message);
}
#endif // FMT_USE_WINDOWS_H
-FMT_FUNC void format_system_error(
- internal::buffer &out, int error_code, string_view message) FMT_NOEXCEPT {
+FMT_FUNC void format_system_error(internal::buffer<char>& out, int error_code,
+ string_view message) FMT_NOEXCEPT {
FMT_TRY {
memory_buffer buf;
buf.resize(inline_buffer_size);
for (;;) {
- char *system_message = &buf[0];
- int result = safe_strerror(error_code, system_message, buf.size());
+ char* system_message = &buf[0];
+ int result =
+ internal::safe_strerror(error_code, system_message, buf.size());
if (result == 0) {
- writer w(out);
+ internal::writer w(out);
w.write(message);
w.write(": ");
w.write(system_message);
break; // Can't get error message, report error code instead.
buf.resize(buf.size() * 2);
}
- } FMT_CATCH(...) {}
+ }
+ FMT_CATCH(...) {}
format_error_code(out, error_code, message);
}
-FMT_FUNC void internal::error_handler::on_error(const char *message) {
+FMT_FUNC void internal::error_handler::on_error(const char* message) {
FMT_THROW(format_error(message));
}
-FMT_FUNC void report_system_error(
- int error_code, fmt::string_view message) FMT_NOEXCEPT {
+FMT_FUNC void report_system_error(int error_code,
+ fmt::string_view message) FMT_NOEXCEPT {
report_error(format_system_error, error_code, message);
}
#if FMT_USE_WINDOWS_H
-FMT_FUNC void report_windows_error(
- int error_code, fmt::string_view message) FMT_NOEXCEPT {
+FMT_FUNC void report_windows_error(int error_code,
+ fmt::string_view message) FMT_NOEXCEPT {
report_error(internal::format_windows_error, error_code, message);
}
#endif
-FMT_FUNC void vprint(std::FILE *f, string_view format_str, format_args args) {
+FMT_FUNC void vprint(std::FILE* f, string_view format_str, format_args args) {
memory_buffer buffer;
internal::vformat_to(buffer, format_str,
- basic_format_args<buffer_context<char>::type>(args));
- std::fwrite(buffer.data(), 1, buffer.size(), f);
+ basic_format_args<buffer_context<char>>(args));
+ internal::fwrite_fully(buffer.data(), 1, buffer.size(), f);
}
-FMT_FUNC void vprint(std::FILE *f, wstring_view format_str, wformat_args args) {
+FMT_FUNC void vprint(std::FILE* f, wstring_view format_str, wformat_args args) {
wmemory_buffer buffer;
internal::vformat_to(buffer, format_str, args);
- std::fwrite(buffer.data(), sizeof(wchar_t), buffer.size(), f);
+ buffer.push_back(L'\0');
+ if (std::fputws(buffer.data(), f) == -1) {
+ FMT_THROW(system_error(errno, "cannot write to file"));
+ }
}
FMT_FUNC void vprint(string_view format_str, format_args args) {
FMT_END_NAMESPACE
#ifdef _MSC_VER
-# pragma warning(pop)
+# pragma warning(pop)
#endif
#endif // FMT_FORMAT_INL_H_
Formatting library for C++
Copyright (c) 2012 - present, Victor Zverovich
- All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are met:
-
- 1. Redistributions of source code must retain the above copyright notice, this
- list of conditions and the following disclaimer.
- 2. Redistributions in binary form must reproduce the above copyright notice,
- this list of conditions and the following disclaimer in the documentation
- and/or other materials provided with the distribution.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
- ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
- ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+ --- Optional exception to the license ---
+
+ As an exception, if, as a result of your compiling your source code, portions
+ of this Software are embedded into a machine-executable object form of such
+ source code, you may redistribute such embedded portions in such object form
+ without including the above copyright and permission notices.
*/
#ifndef FMT_FORMAT_H_
#include <algorithm>
#include <cassert>
#include <cmath>
+#include <cstdint>
#include <cstring>
+#include <iterator>
#include <limits>
#include <memory>
#include <stdexcept>
-#include <stdint.h>
+
+#include "core.h"
#ifdef __clang__
-# define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__)
+# define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__)
#else
-# define FMT_CLANG_VERSION 0
+# define FMT_CLANG_VERSION 0
#endif
#ifdef __INTEL_COMPILER
-# define FMT_ICC_VERSION __INTEL_COMPILER
+# define FMT_ICC_VERSION __INTEL_COMPILER
#elif defined(__ICL)
-# define FMT_ICC_VERSION __ICL
+# define FMT_ICC_VERSION __ICL
#else
-# define FMT_ICC_VERSION 0
+# define FMT_ICC_VERSION 0
#endif
#ifdef __NVCC__
-# define FMT_CUDA_VERSION (__CUDACC_VER_MAJOR__ * 100 + __CUDACC_VER_MINOR__)
-#else
-# define FMT_CUDA_VERSION 0
-#endif
-
-#include "core.h"
-
-#if FMT_GCC_VERSION >= 406 || FMT_CLANG_VERSION
-# pragma GCC diagnostic push
-
-// Disable the warning about declaration shadowing because it affects too
-// many valid cases.
-# pragma GCC diagnostic ignored "-Wshadow"
-
-// Disable the warning about nonliteral format strings because we construct
-// them dynamically when falling back to snprintf for FP formatting.
-# pragma GCC diagnostic ignored "-Wformat-nonliteral"
-#endif
-
-# if FMT_CLANG_VERSION
-# pragma GCC diagnostic ignored "-Wgnu-string-literal-operator-template"
-# endif
-
-#ifdef _SECURE_SCL
-# define FMT_SECURE_SCL _SECURE_SCL
+# define FMT_CUDA_VERSION (__CUDACC_VER_MAJOR__ * 100 + __CUDACC_VER_MINOR__)
#else
-# define FMT_SECURE_SCL 0
-#endif
-
-#if FMT_SECURE_SCL
-# include <iterator>
+# define FMT_CUDA_VERSION 0
#endif
#ifdef __has_builtin
-# define FMT_HAS_BUILTIN(x) __has_builtin(x)
+# define FMT_HAS_BUILTIN(x) __has_builtin(x)
#else
-# define FMT_HAS_BUILTIN(x) 0
-#endif
-
-#ifdef __GNUC_LIBSTD__
-# define FMT_GNUC_LIBSTD_VERSION (__GNUC_LIBSTD__ * 100 + __GNUC_LIBSTD_MINOR__)
+# define FMT_HAS_BUILTIN(x) 0
#endif
#ifndef FMT_THROW
-# if FMT_EXCEPTIONS
-# if FMT_MSC_VER
+# if FMT_EXCEPTIONS
+# if FMT_MSC_VER
FMT_BEGIN_NAMESPACE
namespace internal {
-template <typename Exception>
-inline void do_throw(const Exception &x) {
+template <typename Exception> inline void do_throw(const Exception& x) {
// Silence unreachable code warnings in MSVC because these are nearly
// impossible to fix in a generic code.
volatile bool b = true;
- if (b)
- throw x;
-}
+ if (b) throw x;
}
+} // namespace internal
FMT_END_NAMESPACE
-# define FMT_THROW(x) fmt::internal::do_throw(x)
+# define FMT_THROW(x) fmt::internal::do_throw(x)
+# else
+# define FMT_THROW(x) throw x
+# endif
# else
-# define FMT_THROW(x) throw x
+# define FMT_THROW(x) \
+ do { \
+ static_cast<void>(sizeof(x)); \
+ assert(false); \
+ } while (false)
# endif
-# else
-# define FMT_THROW(x) do { static_cast<void>(sizeof(x)); assert(false); } while(false);
-# endif
#endif
#ifndef FMT_USE_USER_DEFINED_LITERALS
-// For Intel's compiler and NVIDIA's compiler both it and the system gcc/msc
-// must support UDLs.
-# if (FMT_HAS_FEATURE(cxx_user_literals) || \
- FMT_GCC_VERSION >= 407 || FMT_MSC_VER >= 1900) && \
- (!(FMT_ICC_VERSION || FMT_CUDA_VERSION) || \
- FMT_ICC_VERSION >= 1500 || FMT_CUDA_VERSION >= 700)
-# define FMT_USE_USER_DEFINED_LITERALS 1
-# else
-# define FMT_USE_USER_DEFINED_LITERALS 0
-# endif
-#endif
-
-// EDG C++ Front End based compilers (icc, nvcc) do not currently support UDL
-// templates.
-#if FMT_USE_USER_DEFINED_LITERALS && \
- FMT_ICC_VERSION == 0 && \
- FMT_CUDA_VERSION == 0 && \
- ((FMT_GCC_VERSION >= 600 && __cplusplus >= 201402L) || \
- (defined(FMT_CLANG_VERSION) && FMT_CLANG_VERSION >= 304))
-# define FMT_UDL_TEMPLATE 1
-#else
-# define FMT_UDL_TEMPLATE 0
+// For Intel and NVIDIA compilers both they and the system gcc/msc support UDLs.
+# if (FMT_HAS_FEATURE(cxx_user_literals) || FMT_GCC_VERSION >= 407 || \
+ FMT_MSC_VER >= 1900) && \
+ (!(FMT_ICC_VERSION || FMT_CUDA_VERSION) || FMT_ICC_VERSION >= 1500 || \
+ FMT_CUDA_VERSION >= 700)
+# define FMT_USE_USER_DEFINED_LITERALS 1
+# else
+# define FMT_USE_USER_DEFINED_LITERALS 0
+# endif
#endif
-#ifndef FMT_USE_EXTERN_TEMPLATES
-# ifndef FMT_HEADER_ONLY
-# define FMT_USE_EXTERN_TEMPLATES \
- ((FMT_CLANG_VERSION >= 209 && __cplusplus >= 201103L) || \
- (FMT_GCC_VERSION >= 303 && FMT_HAS_GXX_CXX11))
-# else
-# define FMT_USE_EXTERN_TEMPLATES 0
-# endif
+#ifndef FMT_USE_UDL_TEMPLATE
+// EDG front end based compilers (icc, nvcc) do not support UDL templates yet
+// and GCC 9 warns about them.
+# if FMT_USE_USER_DEFINED_LITERALS && FMT_ICC_VERSION == 0 && \
+ FMT_CUDA_VERSION == 0 && \
+ ((FMT_GCC_VERSION >= 600 && FMT_GCC_VERSION <= 900 && \
+ __cplusplus >= 201402L) || \
+ FMT_CLANG_VERSION >= 304)
+# define FMT_USE_UDL_TEMPLATE 1
+# else
+# define FMT_USE_UDL_TEMPLATE 0
+# endif
#endif
-#if FMT_HAS_GXX_CXX11 || FMT_HAS_FEATURE(cxx_trailing_return) || \
- FMT_MSC_VER >= 1600
-# define FMT_USE_TRAILING_RETURN 1
+#ifdef FMT_USE_INT128
+// Do nothing.
+#elif defined(__SIZEOF_INT128__)
+# define FMT_USE_INT128 1
#else
-# define FMT_USE_TRAILING_RETURN 0
-#endif
-
-#ifndef FMT_USE_GRISU
-# define FMT_USE_GRISU 0
-//# define FMT_USE_GRISU std::numeric_limits<double>::is_iec559
+# define FMT_USE_INT128 0
#endif
// __builtin_clz is broken in clang with Microsoft CodeGen:
// https://github.com/fmtlib/fmt/issues/519
-#ifndef _MSC_VER
-# if FMT_GCC_VERSION >= 400 || FMT_HAS_BUILTIN(__builtin_clz)
+#if (FMT_GCC_VERSION || FMT_HAS_BUILTIN(__builtin_clz)) && !FMT_MSC_VER
# define FMT_BUILTIN_CLZ(n) __builtin_clz(n)
-# endif
-
-# if FMT_GCC_VERSION >= 400 || FMT_HAS_BUILTIN(__builtin_clzll)
+#endif
+#if (FMT_GCC_VERSION || FMT_HAS_BUILTIN(__builtin_clzll)) && !FMT_MSC_VER
# define FMT_BUILTIN_CLZLL(n) __builtin_clzll(n)
-# endif
#endif
// Some compilers masquerade as both MSVC and GCC-likes or 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_VER && !defined(FMT_BUILTIN_CLZLL) && !defined(_MANAGED)
-# include <intrin.h> // _BitScanReverse, _BitScanReverse64
+# include <intrin.h> // _BitScanReverse, _BitScanReverse64
FMT_BEGIN_NAMESPACE
namespace internal {
// Avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning.
-# ifndef __clang__
-# pragma intrinsic(_BitScanReverse)
-# endif
+# ifndef __clang__
+# pragma intrinsic(_BitScanReverse)
+# endif
inline uint32_t clz(uint32_t x) {
unsigned long r = 0;
_BitScanReverse(&r, x);
// 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.
-# pragma warning(suppress: 6102)
+# pragma warning(suppress : 6102)
return 31 - r;
}
-# define FMT_BUILTIN_CLZ(n) fmt::internal::clz(n)
+# define FMT_BUILTIN_CLZ(n) fmt::internal::clz(n)
-# if defined(_WIN64) && !defined(__clang__)
-# pragma intrinsic(_BitScanReverse64)
-# endif
+# if defined(_WIN64) && !defined(__clang__)
+# pragma intrinsic(_BitScanReverse64)
+# endif
inline uint32_t clzll(uint64_t x) {
unsigned long r = 0;
-# ifdef _WIN64
+# ifdef _WIN64
_BitScanReverse64(&r, x);
-# else
+# else
// Scan the high 32 bits.
- if (_BitScanReverse(&r, static_cast<uint32_t>(x >> 32)))
- return 63 - (r + 32);
+ if (_BitScanReverse(&r, static_cast<uint32_t>(x >> 32))) return 63 - (r + 32);
// Scan the low 32 bits.
_BitScanReverse(&r, static_cast<uint32_t>(x));
-# endif
+# endif
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.
-# pragma warning(suppress: 6102)
+# pragma warning(suppress : 6102)
return 63 - r;
}
-# define FMT_BUILTIN_CLZLL(n) fmt::internal::clzll(n)
-}
+# define FMT_BUILTIN_CLZLL(n) fmt::internal::clzll(n)
+} // namespace internal
FMT_END_NAMESPACE
#endif
FMT_BEGIN_NAMESPACE
namespace internal {
+// A fallback implementation of uintptr_t for systems that lack it.
+struct fallback_uintptr {
+ unsigned char value[sizeof(void*)];
+};
+#ifdef UINTPTR_MAX
+using uintptr_t = ::uintptr_t;
+#else
+using uintptr_t = fallback_uintptr;
+#endif
+
// An equivalent of `*reinterpret_cast<Dest*>(&source)` that doesn't produce
// undefined behavior (e.g. due to type aliasing).
// Example: uint64_t d = bit_cast<uint64_t>(2.718);
return dest;
}
-// An implementation of begin and end for pre-C++11 compilers such as gcc 4.
-template <typename C>
-FMT_CONSTEXPR auto begin(const C &c) -> decltype(c.begin()) {
- return c.begin();
-}
-template <typename T, std::size_t N>
-FMT_CONSTEXPR T *begin(T (&array)[N]) FMT_NOEXCEPT { return array; }
-template <typename C>
-FMT_CONSTEXPR auto end(const C &c) -> decltype(c.end()) { return c.end(); }
-template <typename T, std::size_t N>
-FMT_CONSTEXPR T *end(T (&array)[N]) FMT_NOEXCEPT { return array + N; }
+// An approximation of iterator_t for pre-C++20 systems.
+template <typename T>
+using iterator_t = decltype(std::begin(std::declval<T&>()));
+
+// Detect the iterator category of *any* given type in a SFINAE-friendly way.
+// Unfortunately, older implementations of std::iterator_traits are not safe
+// for use in a SFINAE-context.
+template <typename It, typename Enable = void>
+struct iterator_category : std::false_type {};
-// For std::result_of in gcc 4.4.
-template <typename Result>
-struct function {
- template <typename T>
- struct result { typedef Result type; };
+template <typename T> struct iterator_category<T*> {
+ using type = std::random_access_iterator_tag;
};
-struct dummy_int {
- int data[2];
- operator int() const { return 0; }
+template <typename It>
+struct iterator_category<It, void_t<typename It::iterator_category>> {
+ using type = typename It::iterator_category;
+};
+
+// Detect if *any* given type models the OutputIterator concept.
+template <typename It> class is_output_iterator {
+ // Check for mutability because all iterator categories derived from
+ // std::input_iterator_tag *may* also meet the requirements of an
+ // OutputIterator, thereby falling into the category of 'mutable iterators'
+ // [iterator.requirements.general] clause 4. The compiler reveals this
+ // property only at the point of *actually dereferencing* the iterator!
+ template <typename U>
+ static decltype(*(std::declval<U>())) test(std::input_iterator_tag);
+ template <typename U> static char& test(std::output_iterator_tag);
+ template <typename U> static const char& test(...);
+
+ using type = decltype(test<It>(typename iterator_category<It>::type{}));
+
+ public:
+ static const bool value = !std::is_const<remove_reference_t<type>>::value;
};
-typedef std::numeric_limits<internal::dummy_int> fputil;
-
-// Dummy implementations of system functions called if the latter are not
-// available.
-inline dummy_int isinf(...) { return dummy_int(); }
-inline dummy_int _finite(...) { return dummy_int(); }
-inline dummy_int isnan(...) { return dummy_int(); }
-inline dummy_int _isnan(...) { return dummy_int(); }
-
-template <typename Allocator>
-typename Allocator::value_type *allocate(Allocator& alloc, std::size_t n) {
-#if __cplusplus >= 201103L || FMT_MSC_VER >= 1700
- return std::allocator_traits<Allocator>::allocate(alloc, n);
+
+// A workaround for std::string not having mutable data() until C++17.
+template <typename Char> inline Char* get_data(std::basic_string<Char>& s) {
+ return &s[0];
+}
+template <typename Container>
+inline typename Container::value_type* get_data(Container& c) {
+ return c.data();
+}
+
+#ifdef _SECURE_SCL
+// Make a checked iterator to avoid MSVC warnings.
+template <typename T> using checked_ptr = stdext::checked_array_iterator<T*>;
+template <typename T> checked_ptr<T> make_checked(T* p, std::size_t size) {
+ return {p, size};
+}
#else
- return alloc.allocate(n);
+template <typename T> using checked_ptr = T*;
+template <typename T> inline T* make_checked(T* p, std::size_t) { return p; }
#endif
+
+template <typename Container, FMT_ENABLE_IF(is_contiguous<Container>::value)>
+inline checked_ptr<typename Container::value_type> reserve(
+ std::back_insert_iterator<Container>& it, std::size_t n) {
+ Container& c = get_container(it);
+ std::size_t size = c.size();
+ c.resize(size + n);
+ return make_checked(get_data(c) + size, n);
}
-// A helper function to suppress bogus "conditional expression is constant"
-// warnings.
-template <typename T>
-inline T const_check(T value) { return value; }
-} // namespace internal
-FMT_END_NAMESPACE
+template <typename Iterator>
+inline Iterator& reserve(Iterator& it, std::size_t) {
+ return it;
+}
+
+// An output iterator that counts the number of objects written to it and
+// discards them.
+template <typename T> class counting_iterator {
+ private:
+ std::size_t count_;
+ mutable T blackhole_;
-namespace std {
-// Standard permits specialization of std::numeric_limits. This specialization
-// is used to resolve ambiguity between isinf and std::isinf in glibc:
-// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48891
-// and the same for isnan.
-template <>
-class numeric_limits<fmt::internal::dummy_int> :
- public std::numeric_limits<int> {
public:
- // Portable version of isinf.
- template <typename T>
- static bool isinfinity(T x) {
- using namespace fmt::internal;
- // The resolution "priority" is:
- // isinf macro > std::isinf > ::isinf > fmt::internal::isinf
- if (const_check(sizeof(isinf(x)) != sizeof(fmt::internal::dummy_int)))
- return isinf(x) != 0;
- return !_finite(static_cast<double>(x));
- }
-
- // Portable version of isnan.
- template <typename T>
- static bool isnotanumber(T x) {
- using namespace fmt::internal;
- if (const_check(sizeof(isnan(x)) != sizeof(fmt::internal::dummy_int)))
- return isnan(x) != 0;
- return _isnan(static_cast<double>(x)) != 0;
+ using iterator_category = std::output_iterator_tag;
+ using value_type = T;
+ using difference_type = std::ptrdiff_t;
+ using pointer = T*;
+ using reference = T&;
+ using _Unchecked_type = counting_iterator; // Mark iterator as checked.
+
+ counting_iterator() : count_(0) {}
+
+ std::size_t count() const { return count_; }
+
+ counting_iterator& operator++() {
+ ++count_;
+ return *this;
+ }
+
+ counting_iterator operator++(int) {
+ auto it = *this;
+ ++*this;
+ return it;
}
+
+ T& operator*() const { return blackhole_; }
};
-} // namespace std
-FMT_BEGIN_NAMESPACE
-template <typename Range>
-class basic_writer;
+template <typename OutputIt> class truncating_iterator_base {
+ protected:
+ OutputIt out_;
+ std::size_t limit_;
+ std::size_t count_;
-template <typename OutputIt, typename T = typename OutputIt::value_type>
-class output_range {
- private:
- OutputIt it_;
+ truncating_iterator_base(OutputIt out, std::size_t limit)
+ : out_(out), limit_(limit), count_(0) {}
+
+ public:
+ using iterator_category = std::output_iterator_tag;
+ using difference_type = void;
+ using pointer = void;
+ using reference = void;
+ using _Unchecked_type =
+ truncating_iterator_base; // Mark iterator as checked.
+
+ OutputIt base() const { return out_; }
+ std::size_t count() const { return count_; }
+};
+
+// An output iterator that truncates the output and counts the number of objects
+// written to it.
+template <typename OutputIt,
+ typename Enable = typename std::is_void<
+ typename std::iterator_traits<OutputIt>::value_type>::type>
+class truncating_iterator;
+
+template <typename OutputIt>
+class truncating_iterator<OutputIt, std::false_type>
+ : public truncating_iterator_base<OutputIt> {
+ using traits = std::iterator_traits<OutputIt>;
- // Unused yet.
- typedef void sentinel;
- sentinel end() const;
+ mutable typename traits::value_type blackhole_;
public:
- typedef OutputIt iterator;
- typedef T value_type;
+ using value_type = typename traits::value_type;
- explicit output_range(OutputIt it): it_(it) {}
- OutputIt begin() const { return it_; }
+ truncating_iterator(OutputIt out, std::size_t limit)
+ : truncating_iterator_base<OutputIt>(out, limit) {}
+
+ truncating_iterator& operator++() {
+ if (this->count_++ < this->limit_) ++this->out_;
+ return *this;
+ }
+
+ truncating_iterator operator++(int) {
+ auto it = *this;
+ ++*this;
+ return it;
+ }
+
+ value_type& operator*() const {
+ return this->count_ < this->limit_ ? *this->out_ : blackhole_;
+ }
};
-// A range where begin() returns back_insert_iterator.
-template <typename Container>
-class back_insert_range:
- public output_range<std::back_insert_iterator<Container>> {
- typedef output_range<std::back_insert_iterator<Container>> base;
+template <typename OutputIt>
+class truncating_iterator<OutputIt, std::true_type>
+ : public truncating_iterator_base<OutputIt> {
public:
- typedef typename Container::value_type value_type;
+ using value_type = typename OutputIt::container_type::value_type;
+
+ truncating_iterator(OutputIt out, std::size_t limit)
+ : truncating_iterator_base<OutputIt>(out, limit) {}
+
+ truncating_iterator& operator=(value_type val) {
+ if (this->count_++ < this->limit_) this->out_ = val;
+ return *this;
+ }
- back_insert_range(Container &c): base(std::back_inserter(c)) {}
- back_insert_range(typename base::iterator it): base(it) {}
+ truncating_iterator& operator++() { return *this; }
+ truncating_iterator& operator++(int) { return *this; }
+ truncating_iterator& operator*() { return *this; }
};
-typedef basic_writer<back_insert_range<internal::buffer>> writer;
-typedef basic_writer<back_insert_range<internal::wbuffer>> wwriter;
+// A range with the specified output iterator and value type.
+template <typename OutputIt, typename T = typename OutputIt::value_type>
+class output_range {
+ private:
+ OutputIt it_;
-/** A formatting error such as invalid format string. */
-class format_error : public std::runtime_error {
public:
- explicit format_error(const char *message)
- : std::runtime_error(message) {}
+ using value_type = T;
+ using iterator = OutputIt;
+ struct sentinel {};
- explicit format_error(const std::string &message)
- : std::runtime_error(message) {}
+ explicit output_range(OutputIt it) : it_(it) {}
+ OutputIt begin() const { return it_; }
+ sentinel end() const { return {}; } // Sentinel is not used yet.
};
-namespace internal {
-
-#if FMT_SECURE_SCL
+// A range with an iterator appending to a buffer.
template <typename T>
-struct checked { typedef stdext::checked_array_iterator<T*> type; };
+class buffer_range
+ : public output_range<std::back_insert_iterator<buffer<T>>, T> {
+ public:
+ using iterator = std::back_insert_iterator<buffer<T>>;
+ using output_range<iterator, T>::output_range;
+ buffer_range(buffer<T>& buf)
+ : output_range<iterator, T>(std::back_inserter(buf)) {}
+};
-// Make a checked iterator to avoid warnings on MSVC.
-template <typename T>
-inline stdext::checked_array_iterator<T*> make_checked(T *p, std::size_t size) {
- return {p, size};
+template <typename Char>
+inline size_t count_code_points(basic_string_view<Char> s) {
+ return s.size();
}
-#else
-template <typename T>
-struct checked { typedef T *type; };
-template <typename T>
-inline T *make_checked(T *p, std::size_t) { return p; }
+
+// Counts the number of code points in a UTF-8 string.
+inline size_t count_code_points(basic_string_view<char8_t> s) {
+ const char8_t* data = s.data();
+ size_t num_code_points = 0;
+ for (size_t i = 0, size = s.size(); i != size; ++i) {
+ if ((data[i] & 0xc0) != 0x80) ++num_code_points;
+ }
+ return num_code_points;
+}
+
+inline char8_t to_char8_t(char c) { return static_cast<char8_t>(c); }
+
+template <typename InputIt, typename OutChar>
+using needs_conversion = bool_constant<
+ std::is_same<typename std::iterator_traits<InputIt>::value_type,
+ char>::value &&
+ std::is_same<OutChar, char8_t>::value>;
+
+template <typename OutChar, typename InputIt, typename OutputIt,
+ FMT_ENABLE_IF(!needs_conversion<InputIt, OutChar>::value)>
+OutputIt copy_str(InputIt begin, InputIt end, OutputIt it) {
+ return std::copy(begin, end, it);
+}
+
+template <typename OutChar, typename InputIt, typename OutputIt,
+ FMT_ENABLE_IF(needs_conversion<InputIt, OutChar>::value)>
+OutputIt copy_str(InputIt begin, InputIt end, OutputIt it) {
+ return std::transform(begin, end, it, to_char8_t);
+}
+
+#ifndef FMT_USE_GRISU
+# define FMT_USE_GRISU 0
#endif
+template <typename T> constexpr bool use_grisu() {
+ return FMT_USE_GRISU && std::numeric_limits<double>::is_iec559 &&
+ sizeof(T) <= sizeof(double);
+}
+
template <typename T>
template <typename U>
-void basic_buffer<T>::append(const U *begin, const U *end) {
- std::size_t new_size = size_ + internal::to_unsigned(end - begin);
+void buffer<T>::append(const U* begin, const U* end) {
+ std::size_t new_size = size_ + to_unsigned(end - begin);
reserve(new_size);
- std::uninitialized_copy(begin, end,
- internal::make_checked(ptr_, capacity_) + size_);
+ std::uninitialized_copy(begin, end, make_checked(ptr_, capacity_) + size_);
size_ = new_size;
}
} // namespace internal
-// C++20 feature test, since r346892 Clang considers char8_t a fundamental
-// type in this mode. If this is the case __cpp_char8_t will be defined.
-#if !defined(__cpp_char8_t)
-// A UTF-8 code unit type.
-enum char8_t: unsigned char {};
-#endif
-
// A UTF-8 string view.
class u8string_view : public basic_string_view<char8_t> {
public:
- typedef char8_t char_type;
-
- u8string_view(const char *s):
- basic_string_view<char8_t>(reinterpret_cast<const char8_t*>(s)) {}
- u8string_view(const char *s, size_t count) FMT_NOEXCEPT:
- basic_string_view<char8_t>(reinterpret_cast<const char8_t*>(s), count) {}
+ u8string_view(const char* s)
+ : basic_string_view<char8_t>(reinterpret_cast<const char8_t*>(s)) {}
+ u8string_view(const char* s, size_t count) FMT_NOEXCEPT
+ : basic_string_view<char8_t>(reinterpret_cast<const char8_t*>(s), count) {
+ }
};
#if FMT_USE_USER_DEFINED_LITERALS
inline namespace literals {
-inline u8string_view operator"" _u(const char *s, std::size_t n) {
+inline u8string_view operator"" _u(const char* s, std::size_t n) {
return {s, n};
}
-}
+} // namespace literals
#endif
// The number of characters to store in the basic_memory_buffer object itself
A dynamically growing memory buffer for trivially copyable/constructible types
with the first ``SIZE`` elements stored in the object itself.
- You can use one of the following typedefs for common character types:
+ You can use one of the following type aliases for common character types:
+----------------+------------------------------+
| Type | Definition |
\endrst
*/
template <typename T, std::size_t SIZE = inline_buffer_size,
- typename Allocator = std::allocator<T> >
-class basic_memory_buffer: private Allocator, public internal::basic_buffer<T> {
+ typename Allocator = std::allocator<T>>
+class basic_memory_buffer : private Allocator, public internal::buffer<T> {
private:
T store_[SIZE];
void grow(std::size_t size) FMT_OVERRIDE;
public:
- typedef T value_type;
- typedef const T &const_reference;
+ using value_type = T;
+ using const_reference = const T&;
- explicit basic_memory_buffer(const Allocator &alloc = Allocator())
+ explicit basic_memory_buffer(const Allocator& alloc = Allocator())
: Allocator(alloc) {
this->set(store_, SIZE);
}
private:
// Move data from other to this buffer.
- void move(basic_memory_buffer &other) {
+ void move(basic_memory_buffer& other) {
Allocator &this_alloc = *this, &other_alloc = other;
this_alloc = std::move(other_alloc);
T* data = other.data();
of the other object to it.
\endrst
*/
- basic_memory_buffer(basic_memory_buffer &&other) {
- move(other);
- }
+ basic_memory_buffer(basic_memory_buffer&& other) { move(other); }
/**
\rst
Moves the content of the other ``basic_memory_buffer`` object to this one.
\endrst
*/
- basic_memory_buffer &operator=(basic_memory_buffer &&other) {
+ basic_memory_buffer& operator=(basic_memory_buffer&& other) {
assert(this != &other);
deallocate();
move(other);
template <typename T, std::size_t SIZE, typename Allocator>
void basic_memory_buffer<T, SIZE, Allocator>::grow(std::size_t size) {
+#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
+ if (size > 1000) throw std::runtime_error("fuzz mode - won't grow that much");
+#endif
std::size_t old_capacity = this->capacity();
std::size_t new_capacity = old_capacity + old_capacity / 2;
- if (size > new_capacity)
- new_capacity = size;
- T *old_data = this->data();
- T *new_data = internal::allocate<Allocator>(*this, new_capacity);
+ if (size > new_capacity) new_capacity = size;
+ T* old_data = this->data();
+ T* new_data = std::allocator_traits<Allocator>::allocate(*this, new_capacity);
// The following code doesn't throw, so the raw pointer above doesn't leak.
std::uninitialized_copy(old_data, old_data + this->size(),
internal::make_checked(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_)
- Allocator::deallocate(old_data, old_capacity);
+ if (old_data != store_) Allocator::deallocate(old_data, old_capacity);
}
-typedef basic_memory_buffer<char> memory_buffer;
-typedef basic_memory_buffer<wchar_t> wmemory_buffer;
-
-namespace internal {
-
-template <typename Char>
-struct char_traits;
-
-template <>
-struct char_traits<char> {
- // Formats a floating-point number.
- template <typename T>
- FMT_API static int format_float(char *buffer, std::size_t size,
- const char *format, int precision, T value);
-};
+using memory_buffer = basic_memory_buffer<char>;
+using wmemory_buffer = basic_memory_buffer<wchar_t>;
-template <>
-struct char_traits<wchar_t> {
- template <typename T>
- FMT_API static int format_float(wchar_t *buffer, std::size_t size,
- const wchar_t *format, int precision, T value);
+/** A formatting error such as invalid format string. */
+class FMT_API format_error : public std::runtime_error {
+ public:
+ explicit format_error(const char* message) : std::runtime_error(message) {}
+ explicit format_error(const std::string& message)
+ : std::runtime_error(message) {}
+ ~format_error() FMT_NOEXCEPT;
};
-#if FMT_USE_EXTERN_TEMPLATES
-extern template int char_traits<char>::format_float<double>(
- char *buffer, std::size_t size, const char* format, int precision,
- double value);
-extern template int char_traits<char>::format_float<long double>(
- char *buffer, std::size_t size, const char* format, int precision,
- long double value);
-
-extern template int char_traits<wchar_t>::format_float<double>(
- wchar_t *buffer, std::size_t size, const wchar_t* format, int precision,
- double value);
-extern template int char_traits<wchar_t>::format_float<long double>(
- wchar_t *buffer, std::size_t size, const wchar_t* format, int precision,
- long double value);
-#endif
+namespace internal {
-template <typename Container>
-inline typename std::enable_if<
- is_contiguous<Container>::value,
- typename checked<typename Container::value_type>::type>::type
- reserve(std::back_insert_iterator<Container> &it, std::size_t n) {
- Container &c = internal::get_container(it);
- std::size_t size = c.size();
- c.resize(size + n);
- return make_checked(&c[size], n);
+// Returns true if value is negative, false otherwise.
+// Same as `value < 0` but doesn't produce warnings if T is an unsigned type.
+template <typename T, FMT_ENABLE_IF(std::numeric_limits<T>::is_signed)>
+FMT_CONSTEXPR bool is_negative(T value) {
+ return value < 0;
+}
+template <typename T, FMT_ENABLE_IF(!std::numeric_limits<T>::is_signed)>
+FMT_CONSTEXPR bool is_negative(T) {
+ return false;
}
-template <typename Iterator>
-inline Iterator &reserve(Iterator &it, std::size_t) { return it; }
-
-template <typename Char>
-class null_terminating_iterator;
-
-template <typename Char>
-FMT_CONSTEXPR_DECL const Char *pointer_from(null_terminating_iterator<Char> it);
-
-// An output iterator that counts the number of objects written to it and
-// discards them.
+// Smallest of uint32_t and uint64_t that is large enough to represent all
+// values of T.
template <typename T>
-class counting_iterator {
- private:
- std::size_t count_;
- mutable T blackhole_;
+using uint32_or_64_t =
+ conditional_t<std::numeric_limits<T>::digits <= 32, uint32_t, uint64_t>;
- public:
- typedef std::output_iterator_tag iterator_category;
- typedef T value_type;
- typedef std::ptrdiff_t difference_type;
- typedef T* pointer;
- typedef T& reference;
- typedef counting_iterator _Unchecked_type; // Mark iterator as checked.
+// Static data is placed in this class template for the header-only config.
+template <typename T = void> struct FMT_EXTERN_TEMPLATE_API basic_data {
+ static const uint64_t powers_of_10_64[];
+ static const uint32_t zero_or_powers_of_10_32[];
+ static const uint64_t zero_or_powers_of_10_64[];
+ static const uint64_t pow10_significands[];
+ static const int16_t pow10_exponents[];
+ static const char digits[];
+ static const char hex_digits[];
+ static const char foreground_color[];
+ static const char background_color[];
+ static const char reset_color[5];
+ static const wchar_t wreset_color[5];
+};
- counting_iterator(): count_(0) {}
+FMT_EXTERN template struct basic_data<void>;
- std::size_t count() const { return count_; }
+// This is a struct rather than an alias to avoid shadowing warnings in gcc.
+struct data : basic_data<> {};
- counting_iterator& operator++() {
- ++count_;
- return *this;
+#ifdef FMT_BUILTIN_CLZLL
+// Returns the number of decimal digits in n. Leading zeros are not counted
+// except for n == 0 in which case count_digits returns 1.
+inline int count_digits(uint64_t n) {
+ // Based on http://graphics.stanford.edu/~seander/bithacks.html#IntegerLog10
+ // and the benchmark https://github.com/localvoid/cxx-benchmark-count-digits.
+ int t = (64 - FMT_BUILTIN_CLZLL(n | 1)) * 1233 >> 12;
+ return t - (n < data::zero_or_powers_of_10_64[t]) + 1;
+}
+#else
+// Fallback version of count_digits used when __builtin_clz is not available.
+inline int count_digits(uint64_t n) {
+ int count = 1;
+ for (;;) {
+ // Integer division is slow so do it for a group of four 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.
+ if (n < 10) return count;
+ if (n < 100) return count + 1;
+ if (n < 1000) return count + 2;
+ if (n < 10000) return count + 3;
+ n /= 10000u;
+ count += 4;
}
+}
+#endif
- counting_iterator operator++(int) {
- auto it = *this;
- ++*this;
- return it;
- }
+// Counts the number of digits in n. BITS = log2(radix).
+template <unsigned BITS, typename UInt> inline int count_digits(UInt n) {
+ int num_digits = 0;
+ do {
+ ++num_digits;
+ } while ((n >>= BITS) != 0);
+ return num_digits;
+}
- T &operator*() const { return blackhole_; }
-};
-
-template <typename OutputIt>
-class truncating_iterator_base {
- protected:
- OutputIt out_;
- std::size_t limit_;
- std::size_t count_;
-
- truncating_iterator_base(OutputIt out, std::size_t limit)
- : out_(out), limit_(limit), count_(0) {}
-
- public:
- typedef std::output_iterator_tag iterator_category;
- typedef void difference_type;
- typedef void pointer;
- typedef void reference;
- typedef truncating_iterator_base _Unchecked_type; // Mark iterator as checked.
-
- OutputIt base() const { return out_; }
- std::size_t count() const { return count_; }
-};
-
-// An output iterator that truncates the output and counts the number of objects
-// written to it.
-template <typename OutputIt, typename Enable = typename std::is_void<
- typename std::iterator_traits<OutputIt>::value_type>::type>
-class truncating_iterator;
-
-template <typename OutputIt>
-class truncating_iterator<OutputIt, std::false_type>:
- public truncating_iterator_base<OutputIt> {
- typedef std::iterator_traits<OutputIt> traits;
-
- mutable typename traits::value_type blackhole_;
-
- public:
- typedef typename traits::value_type value_type;
-
- truncating_iterator(OutputIt out, std::size_t limit)
- : truncating_iterator_base<OutputIt>(out, limit) {}
-
- truncating_iterator& operator++() {
- if (this->count_++ < this->limit_)
- ++this->out_;
- return *this;
- }
-
- truncating_iterator operator++(int) {
- auto it = *this;
- ++*this;
- return it;
- }
-
- value_type& operator*() const {
- return this->count_ < this->limit_ ? *this->out_ : blackhole_;
- }
-};
-
-template <typename OutputIt>
-class truncating_iterator<OutputIt, std::true_type>:
- public truncating_iterator_base<OutputIt> {
- public:
- typedef typename OutputIt::container_type::value_type value_type;
-
- truncating_iterator(OutputIt out, std::size_t limit)
- : truncating_iterator_base<OutputIt>(out, limit) {}
-
- truncating_iterator& operator=(value_type val) {
- if (this->count_++ < this->limit_)
- this->out_ = val;
- return *this;
- }
-
- truncating_iterator& operator++() { return *this; }
- truncating_iterator& operator++(int) { return *this; }
- truncating_iterator& operator*() { return *this; }
-};
-
-// Returns true if value is negative, false otherwise.
-// Same as (value < 0) but doesn't produce warnings if T is an unsigned type.
-template <typename T>
-FMT_CONSTEXPR typename std::enable_if<
- std::numeric_limits<T>::is_signed, bool>::type is_negative(T value) {
- return value < 0;
-}
-template <typename T>
-FMT_CONSTEXPR typename std::enable_if<
- !std::numeric_limits<T>::is_signed, bool>::type is_negative(T) {
- return false;
-}
-
-template <typename T>
-struct int_traits {
- // Smallest of uint32_t and uint64_t that is large enough to represent
- // all values of T.
- typedef typename std::conditional<
- std::numeric_limits<T>::digits <= 32, uint32_t, uint64_t>::type main_type;
-};
-
-// Static data is placed in this class template to allow header-only
-// configuration.
-template <typename T = void>
-struct FMT_API basic_data {
- static const uint32_t POWERS_OF_10_32[];
- static const uint32_t ZERO_OR_POWERS_OF_10_32[];
- static const uint64_t ZERO_OR_POWERS_OF_10_64[];
- static const uint64_t POW10_SIGNIFICANDS[];
- static const int16_t POW10_EXPONENTS[];
- static const char DIGITS[];
- static const char FOREGROUND_COLOR[];
- static const char BACKGROUND_COLOR[];
- static const char RESET_COLOR[];
- static const wchar_t WRESET_COLOR[];
-};
-
-#if FMT_USE_EXTERN_TEMPLATES
-extern template struct basic_data<void>;
-#endif
-
-typedef basic_data<> data;
-
-#ifdef FMT_BUILTIN_CLZLL
-// Returns the number of decimal digits in n. Leading zeros are not counted
-// except for n == 0 in which case count_digits returns 1.
-inline int count_digits(uint64_t n) {
- // Based on http://graphics.stanford.edu/~seander/bithacks.html#IntegerLog10
- // and the benchmark https://github.com/localvoid/cxx-benchmark-count-digits.
- int t = (64 - FMT_BUILTIN_CLZLL(n | 1)) * 1233 >> 12;
- return t - (n < data::ZERO_OR_POWERS_OF_10_64[t]) + 1;
-}
-#else
-// Fallback version of count_digits used when __builtin_clz is not available.
-inline int count_digits(uint64_t n) {
- int count = 1;
- for (;;) {
- // Integer division is slow so do it for a group of four 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.
- if (n < 10) return count;
- if (n < 100) return count + 1;
- if (n < 1000) return count + 2;
- if (n < 10000) return count + 3;
- n /= 10000u;
- count += 4;
- }
-}
-#endif
-
-template <typename Char>
-inline size_t count_code_points(basic_string_view<Char> s) { return s.size(); }
-
-// Counts the number of code points in a UTF-8 string.
-FMT_API size_t count_code_points(basic_string_view<char8_t> s);
-
-inline char8_t to_char8_t(char c) { return static_cast<char8_t>(c); }
-
-template <typename InputIt, typename OutChar>
-struct needs_conversion: std::integral_constant<bool,
- std::is_same<
- typename std::iterator_traits<InputIt>::value_type, char>::value &&
- std::is_same<OutChar, char8_t>::value> {};
-
-template <typename OutChar, typename InputIt, typename OutputIt>
-typename std::enable_if<
- !needs_conversion<InputIt, OutChar>::value, OutputIt>::type
- copy_str(InputIt begin, InputIt end, OutputIt it) {
- return std::copy(begin, end, it);
-}
-
-template <typename OutChar, typename InputIt, typename OutputIt>
-typename std::enable_if<
- needs_conversion<InputIt, OutChar>::value, OutputIt>::type
- copy_str(InputIt begin, InputIt end, OutputIt it) {
- return std::transform(begin, end, it, to_char8_t);
-}
+template <> int count_digits<4>(internal::fallback_uintptr n);
#if FMT_HAS_CPP_ATTRIBUTE(always_inline)
-# define FMT_ALWAYS_INLINE __attribute__((always_inline))
+# define FMT_ALWAYS_INLINE __attribute__((always_inline))
#else
-# define FMT_ALWAYS_INLINE
+# define FMT_ALWAYS_INLINE
#endif
template <typename Handler>
-inline char *lg(uint32_t n, Handler h) FMT_ALWAYS_INLINE;
+inline char* lg(uint32_t n, Handler h) FMT_ALWAYS_INLINE;
// Computes g = floor(log10(n)) and calls h.on<g>(n);
-template <typename Handler>
-inline char *lg(uint32_t n, Handler h) {
+template <typename Handler> inline char* lg(uint32_t n, Handler h) {
return n < 100 ? n < 10 ? h.template on<0>(n) : h.template on<1>(n)
: n < 1000000
? n < 10000 ? n < 1000 ? h.template on<2>(n)
// Usage: lg(n, decimal_formatter(buffer));
class decimal_formatter {
private:
- char *buffer_;
+ char* buffer_;
void write_pair(unsigned N, uint32_t index) {
- std::memcpy(buffer_ + N, data::DIGITS + index * 2, 2);
+ std::memcpy(buffer_ + N, data::digits + index * 2, 2);
}
public:
- explicit decimal_formatter(char *buf) : buffer_(buf) {}
+ explicit decimal_formatter(char* buf) : buffer_(buf) {}
- template <unsigned N> char *on(uint32_t u) {
+ template <unsigned N> char* on(uint32_t u) {
if (N == 0) {
*buffer_ = static_cast<char>(u) + '0';
} else if (N == 1) {
// https://github.com/jeaiii/itoa
unsigned n = N - 1;
unsigned a = n / 5 * n * 53 / 16;
- uint64_t t = ((1ULL << (32 + a)) /
- data::ZERO_OR_POWERS_OF_10_32[n] + 1 - n / 9);
+ uint64_t t =
+ ((1ULL << (32 + a)) / data::zero_or_powers_of_10_32[n] + 1 - n / 9);
t = ((t * u) >> a) + n / 5 * 4;
write_pair(0, t >> 32);
for (unsigned i = 2; i < N; i += 2) {
write_pair(i, t >> 32);
}
if (N % 2 == 0) {
- buffer_[N] = static_cast<char>(
- (10ULL * static_cast<uint32_t>(t)) >> 32) + '0';
+ buffer_[N] =
+ static_cast<char>((10ULL * static_cast<uint32_t>(t)) >> 32) + '0';
}
}
return buffer_ += N + 1;
}
};
-// An lg handler that formats a decimal number with a terminating null.
-class decimal_formatter_null : public decimal_formatter {
- public:
- explicit decimal_formatter_null(char *buf) : decimal_formatter(buf) {}
-
- template <unsigned N> char *on(uint32_t u) {
- char *buf = decimal_formatter::on<N>(u);
- *buf = '\0';
- return buf;
- }
-};
-
#ifdef FMT_BUILTIN_CLZ
// Optional version of count_digits for better performance on 32-bit platforms.
inline int count_digits(uint32_t n) {
int t = (32 - FMT_BUILTIN_CLZ(n | 1)) * 1233 >> 12;
- return t - (n < data::ZERO_OR_POWERS_OF_10_32[t]) + 1;
+ return t - (n < data::zero_or_powers_of_10_32[t]) + 1;
}
#endif
-// A functor that doesn't add a thousands separator.
-struct no_thousands_sep {
- typedef char char_type;
-
- template <typename Char>
- void operator()(Char *) {}
-
- enum { size = 0 };
-};
-
-// A functor that adds a thousands separator.
-template <typename Char>
-class add_thousands_sep {
- private:
- basic_string_view<Char> sep_;
-
- // Index of a decimal digit with the least significant digit having index 0.
- unsigned digit_index_;
-
- public:
- typedef Char char_type;
-
- explicit add_thousands_sep(basic_string_view<Char> sep)
- : sep_(sep), digit_index_(0) {}
-
- void operator()(Char *&buffer) {
- if (++digit_index_ % 3 != 0)
- return;
- buffer -= sep_.size();
- std::uninitialized_copy(sep_.data(), sep_.data() + sep_.size(),
- internal::make_checked(buffer, sep_.size()));
- }
-
- enum { size = 1 };
-};
-
-template <typename Char>
-FMT_API Char thousands_sep_impl(locale_ref loc);
-
-template <typename Char>
-inline Char thousands_sep(locale_ref loc) {
+template <typename Char> FMT_API Char thousands_sep_impl(locale_ref loc);
+template <typename Char> inline Char thousands_sep(locale_ref loc) {
return Char(thousands_sep_impl<char>(loc));
}
-
-template <>
-inline wchar_t thousands_sep(locale_ref loc) {
+template <> inline wchar_t thousands_sep(locale_ref loc) {
return thousands_sep_impl<wchar_t>(loc);
}
+template <typename Char> FMT_API Char decimal_point_impl(locale_ref loc);
+template <typename Char> inline Char decimal_point(locale_ref loc) {
+ return Char(decimal_point_impl<char>(loc));
+}
+template <> inline wchar_t decimal_point(locale_ref loc) {
+ return decimal_point_impl<wchar_t>(loc);
+}
+
// Formats a decimal unsigned integer value writing into buffer.
-// thousands_sep is a functor that is called after writing each char to
-// add a thousands separator if necessary.
-template <typename UInt, typename Char, typename ThousandsSep>
-inline Char *format_decimal(Char *buffer, UInt value, int num_digits,
- ThousandsSep thousands_sep) {
+// add_thousands_sep is called after writing each char to add a thousands
+// separator if necessary.
+template <typename UInt, typename Char, typename F>
+inline Char* format_decimal(Char* buffer, UInt value, int num_digits,
+ F add_thousands_sep) {
FMT_ASSERT(num_digits >= 0, "invalid digit count");
buffer += num_digits;
- Char *end = buffer;
+ Char* end = buffer;
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.
unsigned index = static_cast<unsigned>((value % 100) * 2);
value /= 100;
- *--buffer = static_cast<Char>(data::DIGITS[index + 1]);
- thousands_sep(buffer);
- *--buffer = static_cast<Char>(data::DIGITS[index]);
- thousands_sep(buffer);
+ *--buffer = static_cast<Char>(data::digits[index + 1]);
+ add_thousands_sep(buffer);
+ *--buffer = static_cast<Char>(data::digits[index]);
+ add_thousands_sep(buffer);
}
if (value < 10) {
*--buffer = static_cast<Char>('0' + value);
return end;
}
unsigned index = static_cast<unsigned>(value * 2);
- *--buffer = static_cast<Char>(data::DIGITS[index + 1]);
- thousands_sep(buffer);
- *--buffer = static_cast<Char>(data::DIGITS[index]);
+ *--buffer = static_cast<Char>(data::digits[index + 1]);
+ add_thousands_sep(buffer);
+ *--buffer = static_cast<Char>(data::digits[index]);
return end;
}
-template <typename OutChar, typename UInt, typename Iterator,
- typename ThousandsSep>
-inline Iterator format_decimal(
- Iterator out, UInt value, int num_digits, ThousandsSep sep) {
+template <typename Char, typename UInt, typename Iterator, typename F>
+inline Iterator format_decimal(Iterator out, UInt value, int num_digits,
+ F add_thousands_sep) {
FMT_ASSERT(num_digits >= 0, "invalid digit count");
- typedef typename ThousandsSep::char_type char_type;
// Buffer should be large enough to hold all digits (<= digits10 + 1).
enum { max_size = std::numeric_limits<UInt>::digits10 + 1 };
- FMT_ASSERT(ThousandsSep::size <= 1, "invalid separator");
- char_type buffer[max_size + max_size / 3];
- auto end = format_decimal(buffer, value, num_digits, sep);
- return internal::copy_str<OutChar>(buffer, end, out);
+ Char buffer[max_size + max_size / 3];
+ auto end = format_decimal(buffer, value, num_digits, add_thousands_sep);
+ return internal::copy_str<Char>(buffer, end, out);
}
-template <typename OutChar, typename It, typename UInt>
+template <typename Char, typename It, typename UInt>
inline It format_decimal(It out, UInt value, int num_digits) {
- return format_decimal<OutChar>(out, value, num_digits, no_thousands_sep());
+ return format_decimal<Char>(out, value, num_digits, [](Char*) {});
}
template <unsigned BASE_BITS, typename Char, typename UInt>
-inline Char *format_uint(Char *buffer, UInt value, int num_digits,
+inline Char* format_uint(Char* buffer, UInt value, int num_digits,
bool upper = false) {
buffer += num_digits;
- Char *end = buffer;
+ Char* end = buffer;
do {
- const char *digits = upper ? "0123456789ABCDEF" : "0123456789abcdef";
+ const char* digits = upper ? "0123456789ABCDEF" : data::hex_digits;
unsigned digit = (value & ((1 << BASE_BITS) - 1));
*--buffer = static_cast<Char>(BASE_BITS < 4 ? static_cast<char>('0' + digit)
: digits[digit]);
return end;
}
+template <unsigned BASE_BITS, typename Char>
+Char* format_uint(Char* buffer, internal::fallback_uintptr n, int num_digits,
+ bool = false) {
+ auto char_digits = std::numeric_limits<unsigned char>::digits / 4;
+ int start = (num_digits + char_digits - 1) / char_digits - 1;
+ if (int start_digits = num_digits % char_digits) {
+ unsigned value = n.value[start--];
+ buffer = format_uint<BASE_BITS>(buffer, value, start_digits);
+ }
+ for (; start >= 0; --start) {
+ unsigned value = n.value[start];
+ buffer += char_digits;
+ auto p = buffer;
+ for (int i = 0; i < char_digits; ++i) {
+ unsigned digit = (value & ((1 << BASE_BITS) - 1));
+ *--p = static_cast<Char>(data::hex_digits[digit]);
+ value >>= BASE_BITS;
+ }
+ }
+ return buffer;
+}
+
template <unsigned BASE_BITS, typename Char, typename It, typename UInt>
-inline It format_uint(It out, UInt value, int num_digits,
- bool upper = false) {
- // Buffer should be large enough to hold all digits (digits / BASE_BITS + 1)
- // and null.
- char buffer[std::numeric_limits<UInt>::digits / BASE_BITS + 2];
+inline It format_uint(It out, UInt value, int num_digits, bool upper = false) {
+ // Buffer should be large enough to hold all digits (digits / BASE_BITS + 1).
+ char buffer[std::numeric_limits<UInt>::digits / BASE_BITS + 1];
format_uint<BASE_BITS>(buffer, value, num_digits, upper);
return internal::copy_str<Char>(buffer, buffer + num_digits, out);
}
#ifndef _WIN32
-# define FMT_USE_WINDOWS_H 0
+# define FMT_USE_WINDOWS_H 0
#elif !defined(FMT_USE_WINDOWS_H)
-# define FMT_USE_WINDOWS_H 1
+# define FMT_USE_WINDOWS_H 1
#endif
// Define FMT_USE_WINDOWS_H to 0 to disable use of windows.h.
FMT_API explicit utf8_to_utf16(string_view s);
operator wstring_view() const { return wstring_view(&buffer_[0], size()); }
size_t size() const { return buffer_.size() - 1; }
- const wchar_t *c_str() const { return &buffer_[0]; }
+ const wchar_t* c_str() const { return &buffer_[0]; }
std::wstring str() const { return std::wstring(&buffer_[0], size()); }
};
FMT_API explicit utf16_to_utf8(wstring_view s);
operator string_view() const { return string_view(&buffer_[0], size()); }
size_t size() const { return buffer_.size() - 1; }
- const char *c_str() const { return &buffer_[0]; }
+ const char* c_str() const { return &buffer_[0]; }
std::string str() const { return std::string(&buffer_[0], size()); }
// Performs conversion returning a system error code instead of
FMT_API int convert(wstring_view s);
};
-FMT_API void format_windows_error(fmt::internal::buffer &out, int error_code,
+FMT_API void format_windows_error(fmt::internal::buffer<char>& out,
+ int error_code,
fmt::string_view message) FMT_NOEXCEPT;
#endif
-template <typename T = void>
-struct null {};
-} // namespace internal
+template <typename T = void> struct null {};
-enum alignment {
- ALIGN_DEFAULT, ALIGN_LEFT, ALIGN_RIGHT, ALIGN_CENTER, ALIGN_NUMERIC
-};
+// Workaround an array initialization issue in gcc 4.8.
+template <typename Char> struct fill_t {
+ private:
+ Char data_[6];
-// Flags.
-enum { SIGN_FLAG = 1, PLUS_FLAG = 2, MINUS_FLAG = 4, HASH_FLAG = 8 };
-
-// An alignment specifier.
-struct align_spec {
- unsigned width_;
- // Fill is always wchar_t and cast to char if necessary to avoid having
- // two specialization of AlignSpec and its subclasses.
- wchar_t fill_;
- alignment align_;
-
- FMT_CONSTEXPR align_spec() : width_(0), fill_(' '), align_(ALIGN_DEFAULT) {}
- FMT_CONSTEXPR unsigned width() const { return width_; }
- FMT_CONSTEXPR wchar_t fill() const { return fill_; }
- FMT_CONSTEXPR alignment align() const { return align_; }
+ public:
+ FMT_CONSTEXPR Char& operator[](size_t index) { return data_[index]; }
+ FMT_CONSTEXPR const Char& operator[](size_t index) const {
+ return data_[index];
+ }
+
+ static FMT_CONSTEXPR fill_t<Char> make() {
+ auto fill = fill_t<Char>();
+ fill[0] = Char(' ');
+ return fill;
+ }
};
+} // namespace internal
+
+// We cannot use enum classes as bit fields because of a gcc bug
+// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61414.
+namespace align {
+enum type { none, left, right, center, numeric };
+}
+using align_t = align::type;
+
+namespace sign {
+enum type { none, minus, plus, space };
+}
+using sign_t = sign::type;
-struct core_format_specs {
+// Format specifiers for built-in and string types.
+template <typename Char> struct basic_format_specs {
+ int width;
int precision;
- uint_least8_t flags;
char type;
+ align_t align : 4;
+ sign_t sign : 3;
+ bool alt : 1; // Alternate form ('#').
+ internal::fill_t<Char> fill;
- FMT_CONSTEXPR core_format_specs() : precision(-1), flags(0), type(0) {}
- FMT_CONSTEXPR bool has(unsigned f) const { return (flags & f) != 0; }
+ constexpr basic_format_specs()
+ : width(0),
+ precision(-1),
+ type(0),
+ align(align::none),
+ sign(sign::none),
+ alt(false),
+ fill(internal::fill_t<Char>::make()) {}
};
-// Format specifiers.
-template <typename Char>
-struct basic_format_specs : align_spec, core_format_specs {
- FMT_CONSTEXPR basic_format_specs() {}
-};
+using format_specs = basic_format_specs<char>;
+
+namespace internal {
-typedef basic_format_specs<char> format_specs;
+// Writes the exponent exp in the form "[+-]d{2,3}" to buffer.
+template <typename Char, typename It> It write_exponent(int exp, It it) {
+ FMT_ASSERT(-1000 < exp && exp < 1000, "exponent out of range");
+ if (exp < 0) {
+ *it++ = static_cast<Char>('-');
+ exp = -exp;
+ } else {
+ *it++ = static_cast<Char>('+');
+ }
+ if (exp >= 100) {
+ *it++ = static_cast<Char>(static_cast<char>('0' + exp / 100));
+ exp %= 100;
+ }
+ const char* d = data::digits + exp * 2;
+ *it++ = static_cast<Char>(d[0]);
+ *it++ = static_cast<Char>(d[1]);
+ return it;
+}
-template <typename Char, typename ErrorHandler>
-FMT_CONSTEXPR unsigned basic_parse_context<Char, ErrorHandler>::next_arg_id() {
- if (next_arg_id_ >= 0)
- return internal::to_unsigned(next_arg_id_++);
- on_error("cannot switch from manual to automatic argument indexing");
- return 0;
+struct gen_digits_params {
+ int num_digits;
+ bool fixed;
+ bool upper;
+ bool trailing_zeros;
+};
+
+// The number is given as v = digits * pow(10, exp).
+template <typename Char, typename It>
+It grisu_prettify(const char* digits, int size, int exp, It it,
+ gen_digits_params params, Char decimal_point) {
+ // pow(10, full_exp - 1) <= v <= pow(10, full_exp).
+ int full_exp = size + exp;
+ if (!params.fixed) {
+ // Insert a decimal point after the first digit and add an exponent.
+ *it++ = static_cast<Char>(*digits);
+ if (size > 1) *it++ = decimal_point;
+ exp += size - 1;
+ it = copy_str<Char>(digits + 1, digits + size, it);
+ if (size < params.num_digits)
+ it = std::fill_n(it, params.num_digits - size, static_cast<Char>('0'));
+ *it++ = static_cast<Char>(params.upper ? 'E' : 'e');
+ return write_exponent<Char>(exp, it);
+ }
+ if (size <= full_exp) {
+ // 1234e7 -> 12340000000[.0+]
+ it = copy_str<Char>(digits, digits + size, it);
+ it = std::fill_n(it, full_exp - size, static_cast<Char>('0'));
+ int num_zeros = (std::max)(params.num_digits - full_exp, 1);
+ if (params.trailing_zeros) {
+ *it++ = decimal_point;
+#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
+ if (num_zeros > 1000)
+ throw std::runtime_error("fuzz mode - avoiding excessive cpu use");
+#endif
+ it = std::fill_n(it, num_zeros, static_cast<Char>('0'));
+ }
+ } else if (full_exp > 0) {
+ // 1234e-2 -> 12.34[0+]
+ it = copy_str<Char>(digits, digits + full_exp, it);
+ if (!params.trailing_zeros) {
+ // Remove trailing zeros.
+ while (size > full_exp && digits[size - 1] == '0') --size;
+ if (size != full_exp) *it++ = decimal_point;
+ return copy_str<Char>(digits + full_exp, digits + size, it);
+ }
+ *it++ = decimal_point;
+ it = copy_str<Char>(digits + full_exp, digits + size, it);
+ if (params.num_digits > size) {
+ // Add trailing zeros.
+ int num_zeros = params.num_digits - size;
+ it = std::fill_n(it, num_zeros, static_cast<Char>('0'));
+ }
+ } else {
+ // 1234e-6 -> 0.001234
+ *it++ = static_cast<Char>('0');
+ int num_zeros = -full_exp;
+ if (params.num_digits >= 0 && params.num_digits < num_zeros)
+ num_zeros = params.num_digits;
+ if (!params.trailing_zeros)
+ while (size > 0 && digits[size - 1] == '0') --size;
+ if (num_zeros != 0 || size != 0) {
+ *it++ = decimal_point;
+ it = std::fill_n(it, num_zeros, static_cast<Char>('0'));
+ it = copy_str<Char>(digits, digits + size, it);
+ }
+ }
+ return it;
}
-namespace internal {
+namespace grisu_options {
+enum { fixed = 1, grisu3 = 2 };
+}
-// Formats value using Grisu2 algorithm:
+// Formats value using the Grisu algorithm:
// https://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf
-template <typename Double>
-FMT_API typename std::enable_if<sizeof(Double) == sizeof(uint64_t), bool>::type
- grisu2_format(Double value, buffer &buf, core_format_specs);
-template <typename Double>
-inline typename std::enable_if<sizeof(Double) != sizeof(uint64_t), bool>::type
- grisu2_format(Double, buffer &, core_format_specs) { return false; }
+template <typename Double, FMT_ENABLE_IF(sizeof(Double) == sizeof(uint64_t))>
+FMT_API bool grisu_format(Double, buffer<char>&, int, unsigned, int&);
+template <typename Double, FMT_ENABLE_IF(sizeof(Double) != sizeof(uint64_t))>
+inline bool grisu_format(Double, buffer<char>&, int, unsigned, int&) {
+ return false;
+}
+
+struct sprintf_specs {
+ int precision;
+ char type;
+ bool alt : 1;
+
+ template <typename Char>
+ constexpr sprintf_specs(basic_format_specs<Char> specs)
+ : precision(specs.precision), type(specs.type), alt(specs.alt) {}
+
+ constexpr bool has_precision() const { return precision >= 0; }
+};
template <typename Double>
-void sprintf_format(Double, internal::buffer &, core_format_specs);
+char* sprintf_format(Double, internal::buffer<char>&, sprintf_specs);
template <typename Handler>
-FMT_CONSTEXPR void handle_int_type_spec(char spec, Handler &&handler) {
+FMT_CONSTEXPR void handle_int_type_spec(char spec, Handler&& handler) {
switch (spec) {
- case 0: case 'd':
+ case 0:
+ case 'd':
handler.on_dec();
break;
- case 'x': case 'X':
+ case 'x':
+ case 'X':
handler.on_hex();
break;
- case 'b': case 'B':
+ case 'b':
+ case 'B':
handler.on_bin();
break;
case 'o':
}
template <typename Handler>
-FMT_CONSTEXPR void handle_float_type_spec(char spec, Handler &&handler) {
+FMT_CONSTEXPR void handle_float_type_spec(char spec, Handler&& handler) {
switch (spec) {
- case 0: case 'g': case 'G':
+ case 0:
+ case 'g':
+ case 'G':
handler.on_general();
break;
- case 'e': case 'E':
+ case 'e':
+ case 'E':
handler.on_exp();
break;
- case 'f': case 'F':
+ case 'f':
+ case 'F':
handler.on_fixed();
break;
- case 'a': case 'A':
+ case '%':
+ handler.on_percent();
+ break;
+ case 'a':
+ case 'A':
handler.on_hex();
break;
+ case 'n':
+ handler.on_num();
+ break;
default:
handler.on_error();
break;
}
template <typename Char, typename Handler>
-FMT_CONSTEXPR void handle_char_specs(
- const basic_format_specs<Char> *specs, Handler &&handler) {
+FMT_CONSTEXPR void handle_char_specs(const basic_format_specs<Char>* specs,
+ Handler&& handler) {
if (!specs) return handler.on_char();
if (specs->type && specs->type != 'c') return handler.on_int();
- if (specs->align() == ALIGN_NUMERIC || specs->flags != 0)
+ if (specs->align == align::numeric || specs->sign != sign::none || specs->alt)
handler.on_error("invalid format specifier for char");
handler.on_char();
}
template <typename Char, typename Handler>
-FMT_CONSTEXPR void handle_cstring_type_spec(Char spec, Handler &&handler) {
+FMT_CONSTEXPR void handle_cstring_type_spec(Char spec, Handler&& handler) {
if (spec == 0 || spec == 's')
handler.on_string();
else if (spec == 'p')
}
template <typename Char, typename ErrorHandler>
-FMT_CONSTEXPR void check_string_type_spec(Char spec, ErrorHandler &&eh) {
- if (spec != 0 && spec != 's')
- eh.on_error("invalid type specifier");
+FMT_CONSTEXPR void check_string_type_spec(Char spec, ErrorHandler&& eh) {
+ if (spec != 0 && spec != 's') eh.on_error("invalid type specifier");
}
template <typename Char, typename ErrorHandler>
-FMT_CONSTEXPR void check_pointer_type_spec(Char spec, ErrorHandler &&eh) {
- if (spec != 0 && spec != 'p')
- eh.on_error("invalid type specifier");
+FMT_CONSTEXPR void check_pointer_type_spec(Char spec, ErrorHandler&& eh) {
+ if (spec != 0 && spec != 'p') eh.on_error("invalid type specifier");
}
-template <typename ErrorHandler>
-class int_type_checker : private ErrorHandler {
+template <typename ErrorHandler> class int_type_checker : private ErrorHandler {
public:
FMT_CONSTEXPR explicit int_type_checker(ErrorHandler eh) : ErrorHandler(eh) {}
class float_type_checker : private ErrorHandler {
public:
FMT_CONSTEXPR explicit float_type_checker(ErrorHandler eh)
- : ErrorHandler(eh) {}
+ : ErrorHandler(eh) {}
FMT_CONSTEXPR void on_general() {}
FMT_CONSTEXPR void on_exp() {}
FMT_CONSTEXPR void on_fixed() {}
+ FMT_CONSTEXPR void on_percent() {}
FMT_CONSTEXPR void on_hex() {}
+ FMT_CONSTEXPR void on_num() {}
FMT_CONSTEXPR void on_error() {
ErrorHandler::on_error("invalid type specifier");
public:
FMT_CONSTEXPR char_specs_checker(char type, ErrorHandler eh)
- : ErrorHandler(eh), type_(type) {}
+ : ErrorHandler(eh), type_(type) {}
FMT_CONSTEXPR void on_int() {
handle_int_type_spec(type_, int_type_checker<ErrorHandler>(*this));
class cstring_type_checker : public ErrorHandler {
public:
FMT_CONSTEXPR explicit cstring_type_checker(ErrorHandler eh)
- : ErrorHandler(eh) {}
+ : ErrorHandler(eh) {}
FMT_CONSTEXPR void on_string() {}
FMT_CONSTEXPR void on_pointer() {}
};
template <typename Context>
-void arg_map<Context>::init(const basic_format_args<Context> &args) {
- if (map_)
- return;
- map_ = new entry[args.max_size()];
+void arg_map<Context>::init(const basic_format_args<Context>& args) {
+ if (map_) return;
+ map_ = new entry[internal::to_unsigned(args.max_size())];
if (args.is_packed()) {
- for (unsigned i = 0;/*nothing*/; ++i) {
+ for (int i = 0;; ++i) {
internal::type arg_type = args.type(i);
- switch (arg_type) {
- case internal::none_type:
- return;
- case internal::named_arg_type:
- push_back(args.values_[i]);
- break;
- default:
- break; // Do nothing.
- }
+ if (arg_type == internal::none_type) return;
+ if (arg_type == internal::named_arg_type) push_back(args.values_[i]);
}
}
- for (unsigned i = 0; ; ++i) {
- switch (args.args_[i].type_) {
- case internal::none_type:
- return;
- case internal::named_arg_type:
- push_back(args.args_[i].value_);
- break;
- default:
- break; // Do nothing.
- }
+ for (int i = 0, n = args.max_size(); i < n; ++i) {
+ auto type = args.args_[i].type_;
+ if (type == internal::named_arg_type) push_back(args.args_[i].value_);
}
}
-template <typename Range>
-class arg_formatter_base {
+// This template provides operations for formatting and writing data into a
+// character range.
+template <typename Range> class basic_writer {
public:
- typedef typename Range::value_type char_type;
- typedef decltype(internal::declval<Range>().begin()) iterator;
- typedef basic_format_specs<char_type> format_specs;
+ using char_type = typename Range::value_type;
+ using iterator = typename Range::iterator;
+ using format_specs = basic_format_specs<char_type>;
private:
- typedef basic_writer<Range> writer_type;
- writer_type writer_;
- format_specs *specs_;
+ iterator out_; // Output iterator.
+ internal::locale_ref locale_;
- struct char_writer {
- char_type value;
+ // Attempts to reserve space for n extra characters in the output range.
+ // Returns a pointer to the reserved range or a reference to out_.
+ auto reserve(std::size_t n) -> decltype(internal::reserve(out_, n)) {
+ return internal::reserve(out_, n);
+ }
- size_t size() const { return 1; }
- size_t width() const { return 1; }
+ template <typename F> struct padded_int_writer {
+ size_t size_;
+ string_view prefix;
+ char_type fill;
+ std::size_t padding;
+ F f;
- template <typename It>
- void operator()(It &&it) const { *it++ = value; }
+ size_t size() const { return size_; }
+ size_t width() const { return size_; }
+
+ template <typename It> void operator()(It&& it) const {
+ if (prefix.size() != 0)
+ it = internal::copy_str<char_type>(prefix.begin(), prefix.end(), it);
+ it = std::fill_n(it, padding, fill);
+ f(it);
+ }
};
- void write_char(char_type value) {
- if (specs_)
- writer_.write_padded(*specs_, char_writer{value});
- else
- writer_.write(value);
+ // Writes an integer in the format
+ // <left-padding><prefix><numeric-padding><digits><right-padding>
+ // where <digits> are written by f(it).
+ template <typename F>
+ void write_int(int num_digits, string_view prefix, format_specs specs, F f) {
+ std::size_t size = prefix.size() + internal::to_unsigned(num_digits);
+ char_type fill = specs.fill[0];
+ std::size_t padding = 0;
+ if (specs.align == align::numeric) {
+ auto unsiged_width = internal::to_unsigned(specs.width);
+ if (unsiged_width > size) {
+ padding = unsiged_width - size;
+ size = unsiged_width;
+ }
+ } else if (specs.precision > num_digits) {
+ size = prefix.size() + internal::to_unsigned(specs.precision);
+ padding = internal::to_unsigned(specs.precision - num_digits);
+ fill = static_cast<char_type>('0');
+ }
+ if (specs.align == align::none) specs.align = align::right;
+ write_padded(specs, padded_int_writer<F>{size, prefix, fill, padding, f});
}
- void write_pointer(const void *p) {
- format_specs specs = specs_ ? *specs_ : format_specs();
- specs.flags = HASH_FLAG;
- specs.type = 'x';
- writer_.write_int(reinterpret_cast<uintptr_t>(p), specs);
+ // Writes a decimal integer.
+ template <typename Int> void write_decimal(Int value) {
+ auto abs_value = static_cast<uint32_or_64_t<Int>>(value);
+ bool is_negative = internal::is_negative(value);
+ if (is_negative) abs_value = 0 - abs_value;
+ int num_digits = internal::count_digits(abs_value);
+ auto&& it =
+ reserve((is_negative ? 1 : 0) + static_cast<size_t>(num_digits));
+ if (is_negative) *it++ = static_cast<char_type>('-');
+ it = internal::format_decimal<char_type>(it, abs_value, num_digits);
}
- protected:
- writer_type &writer() { return writer_; }
- format_specs *spec() { return specs_; }
- iterator out() { return writer_.out(); }
+ // The handle_int_type_spec handler that writes an integer.
+ template <typename Int, typename Specs> struct int_writer {
+ using unsigned_type = uint32_or_64_t<Int>;
- void write(bool value) {
- string_view sv(value ? "true" : "false");
- specs_ ? writer_.write(sv, *specs_) : writer_.write(sv);
- }
+ basic_writer<Range>& writer;
+ const Specs& specs;
+ unsigned_type abs_value;
+ char prefix[4];
+ unsigned prefix_size;
- void write(const char_type *value) {
- if (!value)
- FMT_THROW(format_error("string pointer is null"));
- auto length = std::char_traits<char_type>::length(value);
- basic_string_view<char_type> sv(value, length);
- specs_ ? writer_.write(sv, *specs_) : writer_.write(sv);
- }
+ string_view get_prefix() const { return string_view(prefix, prefix_size); }
+
+ int_writer(basic_writer<Range>& w, Int value, const Specs& s)
+ : writer(w),
+ specs(s),
+ abs_value(static_cast<unsigned_type>(value)),
+ prefix_size(0) {
+ if (internal::is_negative(value)) {
+ prefix[0] = '-';
+ ++prefix_size;
+ abs_value = 0 - abs_value;
+ } else if (specs.sign != sign::none && specs.sign != sign::minus) {
+ prefix[0] = specs.sign == sign::plus ? '+' : ' ';
+ ++prefix_size;
+ }
+ }
+
+ struct dec_writer {
+ unsigned_type abs_value;
+ int num_digits;
+
+ template <typename It> void operator()(It&& it) const {
+ it = internal::format_decimal<char_type>(it, abs_value, num_digits);
+ }
+ };
+
+ void on_dec() {
+ int num_digits = internal::count_digits(abs_value);
+ writer.write_int(num_digits, get_prefix(), specs,
+ dec_writer{abs_value, num_digits});
+ }
+
+ struct hex_writer {
+ int_writer& self;
+ int num_digits;
+
+ template <typename It> void operator()(It&& it) const {
+ it = internal::format_uint<4, char_type>(it, self.abs_value, num_digits,
+ self.specs.type != 'x');
+ }
+ };
+
+ void on_hex() {
+ if (specs.alt) {
+ prefix[prefix_size++] = '0';
+ prefix[prefix_size++] = specs.type;
+ }
+ int num_digits = internal::count_digits<4>(abs_value);
+ writer.write_int(num_digits, get_prefix(), specs,
+ hex_writer{*this, num_digits});
+ }
+
+ template <int BITS> struct bin_writer {
+ unsigned_type abs_value;
+ int num_digits;
+
+ template <typename It> void operator()(It&& it) const {
+ it = internal::format_uint<BITS, char_type>(it, abs_value, num_digits);
+ }
+ };
+
+ void on_bin() {
+ if (specs.alt) {
+ prefix[prefix_size++] = '0';
+ prefix[prefix_size++] = static_cast<char>(specs.type);
+ }
+ int num_digits = internal::count_digits<1>(abs_value);
+ writer.write_int(num_digits, get_prefix(), specs,
+ bin_writer<1>{abs_value, num_digits});
+ }
+
+ void on_oct() {
+ int num_digits = internal::count_digits<3>(abs_value);
+ if (specs.alt && specs.precision <= num_digits) {
+ // Octal prefix '0' is counted as a digit, so only add it if precision
+ // is not greater than the number of digits.
+ prefix[prefix_size++] = '0';
+ }
+ writer.write_int(num_digits, get_prefix(), specs,
+ bin_writer<3>{abs_value, num_digits});
+ }
+
+ enum { sep_size = 1 };
+
+ struct num_writer {
+ unsigned_type abs_value;
+ int size;
+ char_type sep;
+
+ template <typename It> void operator()(It&& it) const {
+ basic_string_view<char_type> s(&sep, sep_size);
+ // Index of a decimal digit with the least significant digit having
+ // index 0.
+ unsigned digit_index = 0;
+ it = internal::format_decimal<char_type>(
+ it, abs_value, size, [s, &digit_index](char_type*& buffer) {
+ if (++digit_index % 3 != 0) return;
+ buffer -= s.size();
+ std::uninitialized_copy(s.data(), s.data() + s.size(),
+ internal::make_checked(buffer, s.size()));
+ });
+ }
+ };
+
+ void on_num() {
+ char_type sep = internal::thousands_sep<char_type>(writer.locale_);
+ if (!sep) return on_dec();
+ int num_digits = internal::count_digits(abs_value);
+ int size = num_digits + sep_size * ((num_digits - 1) / 3);
+ writer.write_int(size, get_prefix(), specs,
+ num_writer{abs_value, size, sep});
+ }
+
+ FMT_NORETURN void on_error() {
+ FMT_THROW(format_error("invalid type specifier"));
+ }
+ };
+
+ enum { inf_size = 3 }; // This is an enum to workaround a bug in MSVC.
+
+ struct inf_or_nan_writer {
+ char sign;
+ bool as_percentage;
+ const char* str;
+
+ size_t size() const {
+ return static_cast<std::size_t>(inf_size + (sign ? 1 : 0) +
+ (as_percentage ? 1 : 0));
+ }
+ size_t width() const { return size(); }
+
+ template <typename It> void operator()(It&& it) const {
+ if (sign) *it++ = static_cast<char_type>(sign);
+ it = internal::copy_str<char_type>(
+ str, str + static_cast<std::size_t>(inf_size), it);
+ if (as_percentage) *it++ = static_cast<char_type>('%');
+ }
+ };
+
+ struct double_writer {
+ char sign;
+ internal::buffer<char>& buffer;
+ char* decimal_point_pos;
+ char_type decimal_point;
+
+ size_t size() const { return buffer.size() + (sign ? 1 : 0); }
+ size_t width() const { return size(); }
+
+ template <typename It> void operator()(It&& it) {
+ if (sign) *it++ = static_cast<char_type>(sign);
+ auto begin = buffer.begin();
+ if (decimal_point_pos) {
+ it = internal::copy_str<char_type>(begin, decimal_point_pos, it);
+ *it++ = decimal_point;
+ begin = decimal_point_pos + 1;
+ }
+ it = internal::copy_str<char_type>(begin, buffer.end(), it);
+ }
+ };
+
+ class grisu_writer {
+ private:
+ internal::buffer<char>& digits_;
+ size_t size_;
+ char sign_;
+ int exp_;
+ internal::gen_digits_params params_;
+ char_type decimal_point_;
+
+ public:
+ grisu_writer(char sign, internal::buffer<char>& digits, int exp,
+ const internal::gen_digits_params& params,
+ char_type decimal_point)
+ : digits_(digits),
+ sign_(sign),
+ exp_(exp),
+ params_(params),
+ decimal_point_(decimal_point) {
+ int num_digits = static_cast<int>(digits.size());
+ int full_exp = num_digits + exp - 1;
+ int precision = params.num_digits > 0 ? params.num_digits : 11;
+ params_.fixed |= full_exp >= -4 && full_exp < precision;
+ auto it = internal::grisu_prettify<char>(
+ digits.data(), num_digits, exp, internal::counting_iterator<char>(),
+ params_, '.');
+ size_ = it.count();
+ }
+
+ size_t size() const { return size_ + (sign_ ? 1 : 0); }
+ size_t width() const { return size(); }
+
+ template <typename It> void operator()(It&& it) {
+ if (sign_) *it++ = static_cast<char_type>(sign_);
+ int num_digits = static_cast<int>(digits_.size());
+ it = internal::grisu_prettify<char_type>(digits_.data(), num_digits, exp_,
+ it, params_, decimal_point_);
+ }
+ };
+
+ template <typename Char> struct str_writer {
+ const Char* s;
+ size_t size_;
+
+ size_t size() const { return size_; }
+ size_t width() const {
+ return internal::count_code_points(basic_string_view<Char>(s, size_));
+ }
+
+ template <typename It> void operator()(It&& it) const {
+ it = internal::copy_str<char_type>(s, s + size_, it);
+ }
+ };
+
+ template <typename UIntPtr> struct pointer_writer {
+ UIntPtr value;
+ int num_digits;
+
+ size_t size() const { return to_unsigned(num_digits) + 2; }
+ size_t width() const { return size(); }
+
+ template <typename It> void operator()(It&& it) const {
+ *it++ = static_cast<char_type>('0');
+ *it++ = static_cast<char_type>('x');
+ it = internal::format_uint<4, char_type>(it, value, num_digits);
+ }
+ };
+
+ public:
+ /** Constructs a ``basic_writer`` object. */
+ explicit basic_writer(Range out,
+ internal::locale_ref loc = internal::locale_ref())
+ : out_(out.begin()), locale_(loc) {}
+
+ iterator out() const { return out_; }
+
+ // Writes a value in the format
+ // <left-padding><value><right-padding>
+ // where <value> is written by f(it).
+ template <typename F> void write_padded(const format_specs& specs, F&& f) {
+ // User-perceived width (in code points).
+ unsigned width = to_unsigned(specs.width);
+ size_t size = f.size(); // The number of code units.
+ size_t num_code_points = width != 0 ? f.width() : size;
+ if (width <= num_code_points) return f(reserve(size));
+ auto&& it = reserve(width + (size - num_code_points));
+ char_type fill = specs.fill[0];
+ std::size_t padding = width - num_code_points;
+ if (specs.align == align::right) {
+ it = std::fill_n(it, padding, fill);
+ f(it);
+ } else if (specs.align == align::center) {
+ std::size_t left_padding = padding / 2;
+ it = std::fill_n(it, left_padding, fill);
+ f(it);
+ it = std::fill_n(it, padding - left_padding, fill);
+ } else {
+ f(it);
+ it = std::fill_n(it, padding, fill);
+ }
+ }
+
+ void write(int value) { write_decimal(value); }
+ void write(long value) { write_decimal(value); }
+ void write(long long value) { write_decimal(value); }
+
+ void write(unsigned value) { write_decimal(value); }
+ void write(unsigned long value) { write_decimal(value); }
+ void write(unsigned long long value) { write_decimal(value); }
+
+ // Writes a formatted integer.
+ template <typename T, typename Spec>
+ void write_int(T value, const Spec& spec) {
+ internal::handle_int_type_spec(spec.type,
+ int_writer<T, Spec>(*this, value, spec));
+ }
+
+ void write(double value, const format_specs& specs = format_specs()) {
+ write_double(value, specs);
+ }
+
+ /**
+ \rst
+ Formats *value* using the general format for floating-point numbers
+ (``'g'``) and writes it to the buffer.
+ \endrst
+ */
+ void write(long double value, const format_specs& specs = format_specs()) {
+ write_double(value, specs);
+ }
+
+ // Formats a floating-point number (double or long double).
+ template <typename T, bool USE_GRISU = fmt::internal::use_grisu<T>()>
+ void write_double(T value, const format_specs& specs);
+
+ /** Writes a character to the buffer. */
+ void write(char value) {
+ auto&& it = reserve(1);
+ *it++ = value;
+ }
+
+ template <typename Char, FMT_ENABLE_IF(std::is_same<Char, char_type>::value)>
+ void write(Char value) {
+ auto&& it = reserve(1);
+ *it++ = value;
+ }
+
+ /**
+ \rst
+ Writes *value* to the buffer.
+ \endrst
+ */
+ void write(string_view value) {
+ auto&& it = reserve(value.size());
+ it = internal::copy_str<char_type>(value.begin(), value.end(), it);
+ }
+ void write(wstring_view value) {
+ static_assert(std::is_same<char_type, wchar_t>::value, "");
+ auto&& it = reserve(value.size());
+ it = std::copy(value.begin(), value.end(), it);
+ }
+
+ // Writes a formatted string.
+ template <typename Char>
+ void write(const Char* s, std::size_t size, const format_specs& specs) {
+ write_padded(specs, str_writer<Char>{s, size});
+ }
+
+ template <typename Char>
+ void write(basic_string_view<Char> s,
+ const format_specs& specs = format_specs()) {
+ const Char* data = s.data();
+ std::size_t size = s.size();
+ if (specs.precision >= 0 && internal::to_unsigned(specs.precision) < size)
+ size = internal::to_unsigned(specs.precision);
+ write(data, size, specs);
+ }
+
+ template <typename UIntPtr>
+ void write_pointer(UIntPtr value, const format_specs* specs) {
+ int num_digits = internal::count_digits<4>(value);
+ auto pw = pointer_writer<UIntPtr>{value, num_digits};
+ if (!specs) return pw(reserve(to_unsigned(num_digits) + 2));
+ format_specs specs_copy = *specs;
+ if (specs_copy.align == align::none) specs_copy.align = align::right;
+ write_padded(specs_copy, pw);
+ }
+};
+
+using writer = basic_writer<buffer_range<char>>;
+
+template <typename Range, typename ErrorHandler = internal::error_handler>
+class arg_formatter_base {
+ public:
+ using char_type = typename Range::value_type;
+ using iterator = typename Range::iterator;
+ using format_specs = basic_format_specs<char_type>;
+
+ private:
+ using writer_type = basic_writer<Range>;
+ writer_type writer_;
+ format_specs* specs_;
+
+ struct char_writer {
+ char_type value;
+
+ size_t size() const { return 1; }
+ size_t width() const { return 1; }
+
+ template <typename It> void operator()(It&& it) const { *it++ = value; }
+ };
+
+ void write_char(char_type value) {
+ if (specs_)
+ writer_.write_padded(*specs_, char_writer{value});
+ else
+ writer_.write(value);
+ }
+
+ void write_pointer(const void* p) {
+ writer_.write_pointer(internal::bit_cast<internal::uintptr_t>(p), specs_);
+ }
+
+ protected:
+ writer_type& writer() { return writer_; }
+ FMT_DEPRECATED format_specs* spec() { return specs_; }
+ format_specs* specs() { return specs_; }
+ iterator out() { return writer_.out(); }
+
+ void write(bool value) {
+ string_view sv(value ? "true" : "false");
+ specs_ ? writer_.write(sv, *specs_) : writer_.write(sv);
+ }
+
+ void write(const char_type* value) {
+ if (!value) {
+ FMT_THROW(format_error("string pointer is null"));
+ } else {
+ auto length = std::char_traits<char_type>::length(value);
+ basic_string_view<char_type> sv(value, length);
+ specs_ ? writer_.write(sv, *specs_) : writer_.write(sv);
+ }
+ }
public:
- arg_formatter_base(Range r, format_specs *s, locale_ref loc)
- : writer_(r, loc), specs_(s) {}
+ arg_formatter_base(Range r, format_specs* s, locale_ref loc)
+ : writer_(r, loc), specs_(s) {}
iterator operator()(monostate) {
FMT_ASSERT(false, "invalid argument type");
return out();
}
- template <typename T>
- typename std::enable_if<
- std::is_integral<T>::value || std::is_same<T, char_type>::value,
- iterator>::type operator()(T value) {
- // MSVC2013 fails to compile separate overloads for bool and char_type so
- // use std::is_same instead.
- if (std::is_same<T, bool>::value) {
- if (specs_ && specs_->type)
- return (*this)(value ? 1 : 0);
- write(value != 0);
- } else if (std::is_same<T, char_type>::value) {
- internal::handle_char_specs(
+ template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+ iterator operator()(T value) {
+ if (specs_)
+ writer_.write_int(value, *specs_);
+ else
+ writer_.write(value);
+ return out();
+ }
+
+ iterator operator()(char_type value) {
+ internal::handle_char_specs(
specs_, char_spec_handler(*this, static_cast<char_type>(value)));
- } else {
- specs_ ? writer_.write_int(value, *specs_) : writer_.write(value);
- }
return out();
}
- template <typename T>
- typename std::enable_if<std::is_floating_point<T>::value, iterator>::type
- operator()(T value) {
+ iterator operator()(bool value) {
+ if (specs_ && specs_->type) return (*this)(value ? 1 : 0);
+ write(value != 0);
+ return out();
+ }
+
+ template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
+ iterator operator()(T value) {
writer_.write_double(value, specs_ ? *specs_ : format_specs());
return out();
}
- struct char_spec_handler : internal::error_handler {
- arg_formatter_base &formatter;
+ struct char_spec_handler : ErrorHandler {
+ arg_formatter_base& formatter;
char_type value;
char_spec_handler(arg_formatter_base& f, char_type val)
- : formatter(f), value(val) {}
+ : formatter(f), value(val) {}
void on_int() {
if (formatter.specs_)
};
struct cstring_spec_handler : internal::error_handler {
- arg_formatter_base &formatter;
- const char_type *value;
+ arg_formatter_base& formatter;
+ const char_type* value;
- cstring_spec_handler(arg_formatter_base &f, const char_type *val)
- : formatter(f), value(val) {}
+ cstring_spec_handler(arg_formatter_base& f, const char_type* val)
+ : formatter(f), value(val) {}
void on_string() { formatter.write(value); }
void on_pointer() { formatter.write_pointer(value); }
};
- iterator operator()(const char_type *value) {
+ iterator operator()(const char_type* value) {
if (!specs_) return write(value), out();
- internal::handle_cstring_type_spec(
- specs_->type, cstring_spec_handler(*this, value));
+ internal::handle_cstring_type_spec(specs_->type,
+ cstring_spec_handler(*this, value));
return out();
}
iterator operator()(basic_string_view<char_type> value) {
if (specs_) {
- internal::check_string_type_spec(
- specs_->type, internal::error_handler());
+ internal::check_string_type_spec(specs_->type, internal::error_handler());
writer_.write(value, *specs_);
} else {
writer_.write(value);
return out();
}
- iterator operator()(const void *value) {
+ iterator operator()(const void* value) {
if (specs_)
check_pointer_type_spec(specs_->type, internal::error_handler());
write_pointer(value);
}
};
-template <typename Char>
-FMT_CONSTEXPR bool is_name_start(Char c) {
+template <typename Char> FMT_CONSTEXPR bool is_name_start(Char c) {
return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || '_' == c;
}
// 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, typename ErrorHandler>
-FMT_CONSTEXPR unsigned parse_nonnegative_int(
- const Char *&begin, const Char *end, ErrorHandler &&eh) {
+FMT_CONSTEXPR int parse_nonnegative_int(const Char*& begin, const Char* end,
+ ErrorHandler&& eh) {
assert(begin != end && '0' <= *begin && *begin <= '9');
if (*begin == '0') {
++begin;
}
unsigned value = 0;
// Convert to unsigned to prevent a warning.
- unsigned max_int = (std::numeric_limits<int>::max)();
+ constexpr unsigned max_int = (std::numeric_limits<int>::max)();
unsigned big = max_int / 10;
do {
// Check for overflow.
value = value * 10 + unsigned(*begin - '0');
++begin;
} while (begin != end && '0' <= *begin && *begin <= '9');
- if (value > max_int)
- eh.on_error("number is too big");
- return value;
+ if (value > max_int) eh.on_error("number is too big");
+ return static_cast<int>(value);
}
-template <typename Char, typename Context>
-class custom_formatter: public function<bool> {
+template <typename Context> class custom_formatter {
private:
- Context &ctx_;
+ using char_type = typename Context::char_type;
+
+ basic_parse_context<char_type>& parse_ctx_;
+ Context& ctx_;
public:
- explicit custom_formatter(Context &ctx): ctx_(ctx) {}
+ explicit custom_formatter(basic_parse_context<char_type>& parse_ctx,
+ Context& ctx)
+ : parse_ctx_(parse_ctx), ctx_(ctx) {}
bool operator()(typename basic_format_arg<Context>::handle h) const {
- h.format(ctx_);
+ h.format(parse_ctx_, ctx_);
return true;
}
- template <typename T>
- bool operator()(T) const { return false; }
+ template <typename T> bool operator()(T) const { return false; }
};
template <typename T>
-struct is_integer {
- enum {
- value = std::is_integral<T>::value && !std::is_same<T, bool>::value &&
- !std::is_same<T, char>::value && !std::is_same<T, wchar_t>::value
- };
-};
+using is_integer =
+ bool_constant<std::is_integral<T>::value && !std::is_same<T, bool>::value &&
+ !std::is_same<T, char>::value &&
+ !std::is_same<T, wchar_t>::value>;
-template <typename ErrorHandler>
-class width_checker: public function<unsigned long long> {
+template <typename ErrorHandler> class width_checker {
public:
- explicit FMT_CONSTEXPR width_checker(ErrorHandler &eh) : handler_(eh) {}
-
- template <typename T>
- FMT_CONSTEXPR
- typename std::enable_if<
- is_integer<T>::value, unsigned long long>::type operator()(T value) {
- if (is_negative(value))
- handler_.on_error("negative width");
+ explicit FMT_CONSTEXPR width_checker(ErrorHandler& eh) : handler_(eh) {}
+
+ template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
+ FMT_CONSTEXPR unsigned long long operator()(T value) {
+ if (is_negative(value)) handler_.on_error("negative width");
return static_cast<unsigned long long>(value);
}
- template <typename T>
- FMT_CONSTEXPR typename std::enable_if<
- !is_integer<T>::value, unsigned long long>::type operator()(T) {
+ template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
+ FMT_CONSTEXPR unsigned long long operator()(T) {
handler_.on_error("width is not integer");
return 0;
}
private:
- ErrorHandler &handler_;
+ ErrorHandler& handler_;
};
-template <typename ErrorHandler>
-class precision_checker: public function<unsigned long long> {
+template <typename ErrorHandler> class precision_checker {
public:
- explicit FMT_CONSTEXPR precision_checker(ErrorHandler &eh) : handler_(eh) {}
+ explicit FMT_CONSTEXPR precision_checker(ErrorHandler& eh) : handler_(eh) {}
- template <typename T>
- FMT_CONSTEXPR typename std::enable_if<
- is_integer<T>::value, unsigned long long>::type operator()(T value) {
- if (is_negative(value))
- handler_.on_error("negative precision");
+ template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
+ FMT_CONSTEXPR unsigned long long operator()(T value) {
+ if (is_negative(value)) handler_.on_error("negative precision");
return static_cast<unsigned long long>(value);
}
- template <typename T>
- FMT_CONSTEXPR typename std::enable_if<
- !is_integer<T>::value, unsigned long long>::type operator()(T) {
+ template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
+ FMT_CONSTEXPR unsigned long long operator()(T) {
handler_.on_error("precision is not integer");
return 0;
}
private:
- ErrorHandler &handler_;
+ ErrorHandler& handler_;
};
// A format specifier handler that sets fields in basic_format_specs.
-template <typename Char>
-class specs_setter {
+template <typename Char> class specs_setter {
public:
- explicit FMT_CONSTEXPR specs_setter(basic_format_specs<Char> &specs):
- specs_(specs) {}
+ explicit FMT_CONSTEXPR specs_setter(basic_format_specs<Char>& specs)
+ : specs_(specs) {}
- FMT_CONSTEXPR specs_setter(const specs_setter &other): specs_(other.specs_) {}
+ FMT_CONSTEXPR specs_setter(const specs_setter& other)
+ : specs_(other.specs_) {}
- FMT_CONSTEXPR void on_align(alignment align) { specs_.align_ = align; }
- FMT_CONSTEXPR void on_fill(Char fill) { specs_.fill_ = fill; }
- FMT_CONSTEXPR void on_plus() { specs_.flags |= SIGN_FLAG | PLUS_FLAG; }
- FMT_CONSTEXPR void on_minus() { specs_.flags |= MINUS_FLAG; }
- FMT_CONSTEXPR void on_space() { specs_.flags |= SIGN_FLAG; }
- FMT_CONSTEXPR void on_hash() { specs_.flags |= HASH_FLAG; }
+ FMT_CONSTEXPR void on_align(align_t align) { specs_.align = align; }
+ FMT_CONSTEXPR void on_fill(Char fill) { specs_.fill[0] = fill; }
+ FMT_CONSTEXPR void on_plus() { specs_.sign = sign::plus; }
+ FMT_CONSTEXPR void on_minus() { specs_.sign = sign::minus; }
+ FMT_CONSTEXPR void on_space() { specs_.sign = sign::space; }
+ FMT_CONSTEXPR void on_hash() { specs_.alt = true; }
FMT_CONSTEXPR void on_zero() {
- specs_.align_ = ALIGN_NUMERIC;
- specs_.fill_ = '0';
+ specs_.align = align::numeric;
+ specs_.fill[0] = Char('0');
}
- FMT_CONSTEXPR void on_width(unsigned width) { specs_.width_ = width; }
- FMT_CONSTEXPR void on_precision(unsigned precision) {
- specs_.precision = static_cast<int>(precision);
+ FMT_CONSTEXPR void on_width(int width) { specs_.width = width; }
+ FMT_CONSTEXPR void on_precision(int precision) {
+ specs_.precision = precision;
}
FMT_CONSTEXPR void end_precision() {}
}
protected:
- basic_format_specs<Char> &specs_;
+ basic_format_specs<Char>& specs_;
+};
+
+template <typename ErrorHandler> class numeric_specs_checker {
+ public:
+ FMT_CONSTEXPR numeric_specs_checker(ErrorHandler& eh, internal::type arg_type)
+ : error_handler_(eh), arg_type_(arg_type) {}
+
+ FMT_CONSTEXPR void require_numeric_argument() {
+ if (!is_arithmetic(arg_type_))
+ error_handler_.on_error("format specifier requires numeric argument");
+ }
+
+ FMT_CONSTEXPR void check_sign() {
+ require_numeric_argument();
+ if (is_integral(arg_type_) && arg_type_ != int_type &&
+ arg_type_ != long_long_type && arg_type_ != internal::char_type) {
+ error_handler_.on_error("format specifier requires signed argument");
+ }
+ }
+
+ FMT_CONSTEXPR void check_precision() {
+ if (is_integral(arg_type_) || arg_type_ == internal::pointer_type)
+ error_handler_.on_error("precision not allowed for this argument type");
+ }
+
+ private:
+ ErrorHandler& error_handler_;
+ internal::type arg_type_;
};
// A format specifier handler that checks if specifiers are consistent with the
// argument type.
-template <typename Handler>
-class specs_checker : public Handler {
+template <typename Handler> class specs_checker : public Handler {
public:
FMT_CONSTEXPR specs_checker(const Handler& handler, internal::type arg_type)
- : Handler(handler), arg_type_(arg_type) {}
+ : Handler(handler), checker_(*this, arg_type) {}
- FMT_CONSTEXPR specs_checker(const specs_checker &other)
- : Handler(other), arg_type_(other.arg_type_) {}
+ FMT_CONSTEXPR specs_checker(const specs_checker& other)
+ : Handler(other), checker_(*this, other.arg_type_) {}
- FMT_CONSTEXPR void on_align(alignment align) {
- if (align == ALIGN_NUMERIC)
- require_numeric_argument();
+ FMT_CONSTEXPR void on_align(align_t align) {
+ if (align == align::numeric) checker_.require_numeric_argument();
Handler::on_align(align);
}
FMT_CONSTEXPR void on_plus() {
- check_sign();
+ checker_.check_sign();
Handler::on_plus();
}
FMT_CONSTEXPR void on_minus() {
- check_sign();
+ checker_.check_sign();
Handler::on_minus();
}
FMT_CONSTEXPR void on_space() {
- check_sign();
+ checker_.check_sign();
Handler::on_space();
}
FMT_CONSTEXPR void on_hash() {
- require_numeric_argument();
+ checker_.require_numeric_argument();
Handler::on_hash();
}
FMT_CONSTEXPR void on_zero() {
- require_numeric_argument();
+ checker_.require_numeric_argument();
Handler::on_zero();
}
- FMT_CONSTEXPR void end_precision() {
- if (is_integral(arg_type_) || arg_type_ == pointer_type)
- this->on_error("precision not allowed for this argument type");
- }
+ FMT_CONSTEXPR void end_precision() { checker_.check_precision(); }
private:
- FMT_CONSTEXPR void require_numeric_argument() {
- if (!is_arithmetic(arg_type_))
- this->on_error("format specifier requires numeric argument");
- }
-
- FMT_CONSTEXPR void check_sign() {
- require_numeric_argument();
- if (is_integral(arg_type_) && arg_type_ != int_type &&
- arg_type_ != long_long_type && arg_type_ != internal::char_type) {
- this->on_error("format specifier requires signed argument");
- }
- }
-
- internal::type arg_type_;
+ numeric_specs_checker<Handler> checker_;
};
-template <template <typename> class Handler, typename T,
- typename Context, typename ErrorHandler>
-FMT_CONSTEXPR void set_dynamic_spec(
- T &value, basic_format_arg<Context> arg, ErrorHandler eh) {
+template <template <typename> class Handler, typename T, typename FormatArg,
+ typename ErrorHandler>
+FMT_CONSTEXPR void set_dynamic_spec(T& value, FormatArg arg, ErrorHandler eh) {
unsigned long long big_value =
visit_format_arg(Handler<ErrorHandler>(eh), arg);
if (big_value > to_unsigned((std::numeric_limits<int>::max)()))
struct auto_id {};
-// The standard format specifier handler with checking.
template <typename Context>
-class specs_handler: public specs_setter<typename Context::char_type> {
+FMT_CONSTEXPR typename Context::format_arg get_arg(Context& ctx, int id) {
+ auto arg = ctx.arg(id);
+ if (!arg) ctx.on_error("argument index out of range");
+ return arg;
+}
+
+// The standard format specifier handler with checking.
+template <typename ParseContext, typename Context>
+class specs_handler : public specs_setter<typename Context::char_type> {
public:
- typedef typename Context::char_type char_type;
+ using char_type = typename Context::char_type;
- FMT_CONSTEXPR specs_handler(
- basic_format_specs<char_type> &specs, Context &ctx)
- : specs_setter<char_type>(specs), context_(ctx) {}
+ FMT_CONSTEXPR specs_handler(basic_format_specs<char_type>& specs,
+ ParseContext& parse_ctx, Context& ctx)
+ : specs_setter<char_type>(specs),
+ parse_context_(parse_ctx),
+ context_(ctx) {}
- template <typename Id>
- FMT_CONSTEXPR void on_dynamic_width(Id arg_id) {
- set_dynamic_spec<width_checker>(
- this->specs_.width_, get_arg(arg_id), context_.error_handler());
+ template <typename Id> FMT_CONSTEXPR void on_dynamic_width(Id arg_id) {
+ set_dynamic_spec<width_checker>(this->specs_.width, get_arg(arg_id),
+ context_.error_handler());
}
- template <typename Id>
- FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) {
- set_dynamic_spec<precision_checker>(
- this->specs_.precision, get_arg(arg_id), context_.error_handler());
+ template <typename Id> FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) {
+ set_dynamic_spec<precision_checker>(this->specs_.precision, get_arg(arg_id),
+ context_.error_handler());
}
- void on_error(const char *message) {
- context_.on_error(message);
- }
+ void on_error(const char* message) { context_.on_error(message); }
private:
- FMT_CONSTEXPR basic_format_arg<Context> get_arg(auto_id) {
- return context_.next_arg();
+ // This is only needed for compatibility with gcc 4.4.
+ using format_arg = typename Context::format_arg;
+
+ FMT_CONSTEXPR format_arg get_arg(auto_id) {
+ return internal::get_arg(context_, parse_context_.next_arg_id());
}
- template <typename Id>
- FMT_CONSTEXPR basic_format_arg<Context> get_arg(Id arg_id) {
- context_.parse_context().check_arg_id(arg_id);
- return context_.get_arg(arg_id);
+ FMT_CONSTEXPR format_arg get_arg(int arg_id) {
+ parse_context_.check_arg_id(arg_id);
+ return internal::get_arg(context_, arg_id);
}
- Context &context_;
-};
+ FMT_CONSTEXPR format_arg get_arg(basic_string_view<char_type> arg_id) {
+ parse_context_.check_arg_id(arg_id);
+ return context_.arg(arg_id);
+ }
-// An argument reference.
-template <typename Char>
-struct arg_ref {
- enum Kind { NONE, INDEX, NAME };
+ ParseContext& parse_context_;
+ Context& context_;
+};
- FMT_CONSTEXPR arg_ref() : kind(NONE), index(0) {}
- FMT_CONSTEXPR explicit arg_ref(unsigned index) : kind(INDEX), index(index) {}
- explicit arg_ref(basic_string_view<Char> nm) : kind(NAME) {
- name = {nm.data(), nm.size()};
+struct string_view_metadata {
+ FMT_CONSTEXPR string_view_metadata() : offset_(0u), size_(0u) {}
+ template <typename Char>
+ FMT_CONSTEXPR string_view_metadata(basic_string_view<Char> primary_string,
+ basic_string_view<Char> view)
+ : offset_(to_unsigned(view.data() - primary_string.data())),
+ size_(view.size()) {}
+ FMT_CONSTEXPR string_view_metadata(std::size_t offset, std::size_t size)
+ : offset_(offset), size_(size) {}
+ template <typename Char>
+ FMT_CONSTEXPR basic_string_view<Char> to_view(const Char* str) const {
+ return {str + offset_, size_};
}
- FMT_CONSTEXPR arg_ref &operator=(unsigned idx) {
- kind = INDEX;
- index = idx;
+ std::size_t offset_;
+ std::size_t size_;
+};
+
+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(string_view_metadata name)
+ : kind(arg_id_kind::name), val(name) {}
+
+ FMT_CONSTEXPR arg_ref& operator=(int idx) {
+ kind = arg_id_kind::index;
+ val.index = idx;
return *this;
}
- Kind kind;
- union {
- unsigned index;
- string_value<Char> name; // This is not string_view because of gcc 4.4.
- };
+ arg_id_kind kind;
+ union value {
+ FMT_CONSTEXPR value() : index(0u) {}
+ FMT_CONSTEXPR value(int id) : index(id) {}
+ FMT_CONSTEXPR value(string_view_metadata n) : name(n) {}
+
+ int index;
+ string_view_metadata name;
+ } val;
};
// Format specifiers with width and precision resolved at formatting rather
// than parsing time to allow re-using the same parsed specifiers with
-// differents sets of arguments (precompilation of format strings).
+// different sets of arguments (precompilation of format strings).
template <typename Char>
struct dynamic_format_specs : basic_format_specs<Char> {
arg_ref<Char> width_ref;
// Format spec handler that saves references to arguments representing dynamic
// width and precision to be resolved at formatting time.
template <typename ParseContext>
-class dynamic_specs_handler :
- public specs_setter<typename ParseContext::char_type> {
+class dynamic_specs_handler
+ : public specs_setter<typename ParseContext::char_type> {
public:
- typedef typename ParseContext::char_type char_type;
+ using char_type = typename ParseContext::char_type;
- FMT_CONSTEXPR dynamic_specs_handler(
- dynamic_format_specs<char_type> &specs, ParseContext &ctx)
- : specs_setter<char_type>(specs), specs_(specs), context_(ctx) {}
+ FMT_CONSTEXPR dynamic_specs_handler(dynamic_format_specs<char_type>& specs,
+ ParseContext& ctx)
+ : specs_setter<char_type>(specs), specs_(specs), context_(ctx) {}
- FMT_CONSTEXPR dynamic_specs_handler(const dynamic_specs_handler &other)
- : specs_setter<char_type>(other),
- specs_(other.specs_), context_(other.context_) {}
+ FMT_CONSTEXPR dynamic_specs_handler(const dynamic_specs_handler& other)
+ : specs_setter<char_type>(other),
+ specs_(other.specs_),
+ context_(other.context_) {}
- template <typename Id>
- FMT_CONSTEXPR void on_dynamic_width(Id arg_id) {
+ template <typename Id> FMT_CONSTEXPR void on_dynamic_width(Id arg_id) {
specs_.width_ref = make_arg_ref(arg_id);
}
- template <typename Id>
- FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) {
+ template <typename Id> FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) {
specs_.precision_ref = make_arg_ref(arg_id);
}
- FMT_CONSTEXPR void on_error(const char *message) {
+ FMT_CONSTEXPR void on_error(const char* message) {
context_.on_error(message);
}
private:
- typedef arg_ref<char_type> arg_ref_type;
+ using arg_ref_type = arg_ref<char_type>;
- template <typename Id>
- FMT_CONSTEXPR arg_ref_type make_arg_ref(Id arg_id) {
+ FMT_CONSTEXPR arg_ref_type make_arg_ref(int arg_id) {
context_.check_arg_id(arg_id);
return arg_ref_type(arg_id);
}
return arg_ref_type(context_.next_arg_id());
}
- dynamic_format_specs<char_type> &specs_;
- ParseContext &context_;
+ FMT_CONSTEXPR arg_ref_type make_arg_ref(basic_string_view<char_type> arg_id) {
+ context_.check_arg_id(arg_id);
+ basic_string_view<char_type> format_str(
+ context_.begin(), to_unsigned(context_.end() - context_.begin()));
+ const auto id_metadata = string_view_metadata(format_str, arg_id);
+ return arg_ref_type(id_metadata);
+ }
+
+ dynamic_format_specs<char_type>& specs_;
+ ParseContext& context_;
};
template <typename Char, typename IDHandler>
-FMT_CONSTEXPR const Char *parse_arg_id(
- const Char *begin, const Char *end, IDHandler &&handler) {
+FMT_CONSTEXPR const Char* parse_arg_id(const Char* begin, const Char* end,
+ IDHandler&& handler) {
assert(begin != end);
Char c = *begin;
- if (c == '}' || c == ':')
- return handler(), begin;
+ if (c == '}' || c == ':') return handler(), begin;
if (c >= '0' && c <= '9') {
- unsigned index = parse_nonnegative_int(begin, end, handler);
+ int index = parse_nonnegative_int(begin, end, handler);
if (begin == end || (*begin != '}' && *begin != ':'))
return handler.on_error("invalid format string"), begin;
handler(index);
}
// Adapts SpecHandler to IDHandler API for dynamic width.
-template <typename SpecHandler, typename Char>
-struct width_adapter {
- explicit FMT_CONSTEXPR width_adapter(SpecHandler &h) : handler(h) {}
+template <typename SpecHandler, typename Char> struct width_adapter {
+ explicit FMT_CONSTEXPR width_adapter(SpecHandler& h) : handler(h) {}
FMT_CONSTEXPR void operator()() { handler.on_dynamic_width(auto_id()); }
- FMT_CONSTEXPR void operator()(unsigned id) { handler.on_dynamic_width(id); }
+ FMT_CONSTEXPR void operator()(int id) { handler.on_dynamic_width(id); }
FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
handler.on_dynamic_width(id);
}
- FMT_CONSTEXPR void on_error(const char *message) {
+ FMT_CONSTEXPR void on_error(const char* message) {
handler.on_error(message);
}
- SpecHandler &handler;
+ SpecHandler& handler;
};
// Adapts SpecHandler to IDHandler API for dynamic precision.
-template <typename SpecHandler, typename Char>
-struct precision_adapter {
- explicit FMT_CONSTEXPR precision_adapter(SpecHandler &h) : handler(h) {}
+template <typename SpecHandler, typename Char> struct precision_adapter {
+ explicit FMT_CONSTEXPR precision_adapter(SpecHandler& h) : handler(h) {}
FMT_CONSTEXPR void operator()() { handler.on_dynamic_precision(auto_id()); }
- FMT_CONSTEXPR void operator()(unsigned id) {
- handler.on_dynamic_precision(id);
- }
+ FMT_CONSTEXPR void operator()(int id) { handler.on_dynamic_precision(id); }
FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
handler.on_dynamic_precision(id);
}
- FMT_CONSTEXPR void on_error(const char *message) { handler.on_error(message); }
+ FMT_CONSTEXPR void on_error(const char* message) {
+ handler.on_error(message);
+ }
- SpecHandler &handler;
+ SpecHandler& handler;
};
// Parses fill and alignment.
template <typename Char, typename Handler>
-FMT_CONSTEXPR const Char *parse_align(
- const Char *begin, const Char *end, Handler &&handler) {
+FMT_CONSTEXPR const Char* parse_align(const Char* begin, const Char* end,
+ Handler&& handler) {
FMT_ASSERT(begin != end, "");
- alignment align = ALIGN_DEFAULT;
+ auto align = align::none;
int i = 0;
if (begin + 1 != end) ++i;
do {
switch (static_cast<char>(begin[i])) {
case '<':
- align = ALIGN_LEFT;
+ align = align::left;
break;
case '>':
- align = ALIGN_RIGHT;
+ align = align::right;
break;
case '=':
- align = ALIGN_NUMERIC;
+ align = align::numeric;
break;
case '^':
- align = ALIGN_CENTER;
+ align = align::center;
break;
}
- if (align != ALIGN_DEFAULT) {
+ if (align != align::none) {
if (i > 0) {
auto c = *begin;
if (c == '{')
return handler.on_error("invalid fill character '{'"), begin;
begin += 2;
handler.on_fill(c);
- } else ++begin;
+ } else
+ ++begin;
handler.on_align(align);
break;
}
}
template <typename Char, typename Handler>
-FMT_CONSTEXPR const Char *parse_width(
- const Char *begin, const Char *end, Handler &&handler) {
+FMT_CONSTEXPR const Char* parse_width(const Char* begin, const Char* end,
+ Handler&& handler) {
FMT_ASSERT(begin != end, "");
if ('0' <= *begin && *begin <= '9') {
handler.on_width(parse_nonnegative_int(begin, end, handler));
return begin;
}
+template <typename Char, typename Handler>
+FMT_CONSTEXPR const Char* parse_precision(const Char* begin, const Char* end,
+ Handler&& handler) {
+ ++begin;
+ auto c = begin != end ? *begin : Char();
+ if ('0' <= c && c <= '9') {
+ handler.on_precision(parse_nonnegative_int(begin, end, handler));
+ } else if (c == '{') {
+ ++begin;
+ if (begin != end) {
+ begin =
+ parse_arg_id(begin, end, precision_adapter<Handler, Char>(handler));
+ }
+ if (begin == end || *begin++ != '}')
+ return handler.on_error("invalid format string"), begin;
+ } else {
+ return handler.on_error("missing precision specifier"), begin;
+ }
+ handler.end_precision();
+ return begin;
+}
+
// Parses standard format specifiers and sends notifications about parsed
// components to handler.
template <typename Char, typename SpecHandler>
-FMT_CONSTEXPR const Char *parse_format_specs(
- const Char *begin, const Char *end, SpecHandler &&handler) {
- if (begin == end || *begin == '}')
- return begin;
+FMT_CONSTEXPR const Char* parse_format_specs(const Char* begin, const Char* end,
+ SpecHandler&& handler) {
+ if (begin == end || *begin == '}') return begin;
begin = parse_align(begin, end, handler);
if (begin == end) return begin;
// Parse precision.
if (*begin == '.') {
- ++begin;
- auto c = begin != end ? *begin : 0;
- if ('0' <= c && c <= '9') {
- handler.on_precision(parse_nonnegative_int(begin, end, handler));
- } else if (c == '{') {
- ++begin;
- if (begin != end) {
- begin = parse_arg_id(
- begin, end, precision_adapter<SpecHandler, Char>(handler));
- }
- if (begin == end || *begin++ != '}')
- return handler.on_error("invalid format string"), begin;
- } else {
- return handler.on_error("missing precision specifier"), begin;
- }
- handler.end_precision();
+ begin = parse_precision(begin, end, handler);
}
// Parse type.
- if (begin != end && *begin != '}')
- handler.on_type(*begin++);
+ if (begin != end && *begin != '}') handler.on_type(*begin++);
return begin;
}
// Return the result via the out param to workaround gcc bug 77539.
template <bool IS_CONSTEXPR, typename T, typename Ptr = const T*>
-FMT_CONSTEXPR bool find(Ptr first, Ptr last, T value, Ptr &out) {
+FMT_CONSTEXPR bool find(Ptr first, Ptr last, T value, Ptr& out) {
for (out = first; out != last; ++out) {
- if (*out == value)
- return true;
+ if (*out == value) return true;
}
return false;
}
template <>
-inline bool find<false, char>(
- const char *first, const char *last, char value, const char *&out) {
- out = static_cast<const char*>(std::memchr(first, value, internal::to_unsigned(last - first)));
- return out != FMT_NULL;
+inline bool find<false, char>(const char* first, const char* last, char value,
+ const char*& out) {
+ out = static_cast<const char*>(
+ std::memchr(first, value, internal::to_unsigned(last - first)));
+ return out != nullptr;
}
-template <typename Handler, typename Char>
-struct id_adapter {
+template <typename Handler, typename Char> struct id_adapter {
FMT_CONSTEXPR void operator()() { handler.on_arg_id(); }
- FMT_CONSTEXPR void operator()(unsigned id) { handler.on_arg_id(id); }
+ FMT_CONSTEXPR void operator()(int id) { handler.on_arg_id(id); }
FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
handler.on_arg_id(id);
}
- FMT_CONSTEXPR void on_error(const char *message) {
+ FMT_CONSTEXPR void on_error(const char* message) {
handler.on_error(message);
}
- Handler &handler;
+ Handler& handler;
};
template <bool IS_CONSTEXPR, typename Char, typename Handler>
-FMT_CONSTEXPR void parse_format_string(
- basic_string_view<Char> format_str, Handler &&handler) {
+FMT_CONSTEXPR void parse_format_string(basic_string_view<Char> format_str,
+ Handler&& handler) {
struct writer {
- FMT_CONSTEXPR void operator()(const Char *begin, const Char *end) {
+ FMT_CONSTEXPR void operator()(const Char* begin, const Char* end) {
if (begin == end) return;
for (;;) {
- const Char *p = FMT_NULL;
+ const Char* p = nullptr;
if (!find<IS_CONSTEXPR>(begin, end, '}', p))
return handler_.on_text(begin, end);
++p;
begin = p + 1;
}
}
- Handler &handler_;
+ Handler& handler_;
} write{handler};
auto begin = format_str.data();
auto end = begin + format_str.size();
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;
+ const Char* p = begin;
if (*begin != '{' && !find<IS_CONSTEXPR>(begin, end, '{', p))
return write(begin, end);
write(begin, p);
++p;
- if (p == end)
- return handler.on_error("invalid format string");
+ if (p == end) return handler.on_error("invalid format string");
if (static_cast<char>(*p) == '}') {
handler.on_arg_id();
handler.on_replacement_field(p);
}
template <typename T, typename ParseContext>
-FMT_CONSTEXPR const typename ParseContext::char_type *
- parse_format_specs(ParseContext &ctx) {
- // GCC 7.2 requires initializer.
- formatter<T, typename ParseContext::char_type> f{};
+FMT_CONSTEXPR const typename ParseContext::char_type* parse_format_specs(
+ ParseContext& ctx) {
+ using char_type = typename ParseContext::char_type;
+ using context = buffer_context<char_type>;
+ using mapped_type =
+ conditional_t<internal::mapped_type_constant<T, context>::value !=
+ internal::custom_type,
+ decltype(arg_mapper<context>().map(std::declval<T>())), T>;
+ conditional_t<has_formatter<mapped_type, context>::value,
+ formatter<mapped_type, char_type>,
+ internal::fallback_formatter<T, char_type>>
+ f;
return f.parse(ctx);
}
public:
explicit FMT_CONSTEXPR format_string_checker(
basic_string_view<Char> format_str, ErrorHandler eh)
- : arg_id_((std::numeric_limits<unsigned>::max)()), context_(format_str, eh),
- parse_funcs_{&parse_format_specs<Args, parse_context_type>...} {}
+ : arg_id_((std::numeric_limits<unsigned>::max)()),
+ context_(format_str, eh),
+ parse_funcs_{&parse_format_specs<Args, parse_context_type>...} {}
- FMT_CONSTEXPR void on_text(const Char *, const Char *) {}
+ FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
FMT_CONSTEXPR void on_arg_id() {
arg_id_ = context_.next_arg_id();
check_arg_id();
}
- FMT_CONSTEXPR void on_arg_id(unsigned id) {
+ FMT_CONSTEXPR void on_arg_id(int id) {
arg_id_ = id;
context_.check_arg_id(id);
check_arg_id();
}
- FMT_CONSTEXPR void on_arg_id(basic_string_view<Char>) {}
-
- FMT_CONSTEXPR void on_replacement_field(const Char *) {}
-
- FMT_CONSTEXPR const Char *on_format_specs(const Char *begin, const Char *) {
- context_.advance_to(begin);
- return arg_id_ < NUM_ARGS ?
- parse_funcs_[arg_id_](context_) : begin;
- }
-
- FMT_CONSTEXPR void on_error(const char *message) {
- context_.on_error(message);
- }
-
- private:
- typedef basic_parse_context<Char, ErrorHandler> parse_context_type;
- enum { NUM_ARGS = sizeof...(Args) };
-
- FMT_CONSTEXPR void check_arg_id() {
- if (arg_id_ >= NUM_ARGS)
- context_.on_error("argument index out of range");
- }
-
- // Format specifier parsing function.
- typedef const Char *(*parse_func)(parse_context_type &);
-
- unsigned arg_id_;
- parse_context_type context_;
- parse_func parse_funcs_[NUM_ARGS > 0 ? NUM_ARGS : 1];
-};
-
-template <typename Char, typename ErrorHandler, typename... Args>
-FMT_CONSTEXPR bool do_check_format_string(
- basic_string_view<Char> s, ErrorHandler eh = ErrorHandler()) {
- format_string_checker<Char, ErrorHandler, Args...> checker(s, eh);
- parse_format_string<true>(s, checker);
- return true;
-}
-
-template <typename... Args, typename S>
-typename std::enable_if<is_compile_string<S>::value>::type
- check_format_string(S format_str) {
- typedef typename S::char_type char_t;
- FMT_CONSTEXPR_DECL bool invalid_format = internal::do_check_format_string<
- char_t, internal::error_handler, Args...>(to_string_view(format_str));
- (void)invalid_format;
-}
-
-// Specifies whether to format T using the standard formatter.
-// It is not possible to use get_type in formatter specialization directly
-// because of a bug in MSVC.
-template <typename Context, typename T>
-struct format_type :
- std::integral_constant<bool, get_type<Context, T>::value != custom_type> {};
-
-template <template <typename> class Handler, typename Spec, typename Context>
-void handle_dynamic_spec(
- Spec &value, arg_ref<typename Context::char_type> ref, Context &ctx) {
- typedef typename Context::char_type char_type;
- switch (ref.kind) {
- case arg_ref<char_type>::NONE:
- break;
- case arg_ref<char_type>::INDEX:
- internal::set_dynamic_spec<Handler>(
- value, ctx.get_arg(ref.index), ctx.error_handler());
- break;
- case arg_ref<char_type>::NAME:
- internal::set_dynamic_spec<Handler>(
- value, ctx.get_arg({ref.name.value, ref.name.size}),
- ctx.error_handler());
- break;
- }
-}
-} // namespace internal
-
-/** The default argument formatter. */
-template <typename Range>
-class arg_formatter:
- public internal::function<
- typename internal::arg_formatter_base<Range>::iterator>,
- public internal::arg_formatter_base<Range> {
- private:
- typedef typename Range::value_type char_type;
- typedef internal::arg_formatter_base<Range> base;
- typedef basic_format_context<typename base::iterator, char_type> context_type;
-
- context_type &ctx_;
-
- public:
- typedef Range range;
- typedef typename base::iterator iterator;
- typedef typename base::format_specs format_specs;
-
- /**
- \rst
- Constructs an argument formatter object.
- *ctx* is a reference to the formatting context,
- *spec* contains format specifier information for standard argument types.
- \endrst
- */
- explicit arg_formatter(context_type &ctx, format_specs *spec = FMT_NULL)
- : base(Range(ctx.out()), spec, ctx.locale()), ctx_(ctx) {}
-
- // Deprecated.
- arg_formatter(context_type &ctx, format_specs &spec)
- : base(Range(ctx.out()), &spec), ctx_(ctx) {}
-
- using base::operator();
-
- /** Formats an argument of a user-defined type. */
- iterator operator()(typename basic_format_arg<context_type>::handle handle) {
- handle.format(ctx_);
- return this->out();
- }
-};
-
-/**
- An error returned by an operating system or a language runtime,
- for example a file opening error.
-*/
-class system_error : public std::runtime_error {
- private:
- FMT_API void init(int err_code, string_view format_str, format_args args);
-
- protected:
- int error_code_;
-
- system_error() : std::runtime_error("") {}
-
- public:
- /**
- \rst
- Constructs a :class:`fmt::system_error` object with a description
- formatted with `fmt::format_system_error`. *message* and additional
- arguments passed into the constructor are formatted similarly to
- `fmt::format`.
-
- **Example**::
-
- // This throws a 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... Args>
- system_error(int error_code, string_view message, const Args &... args)
- : std::runtime_error("") {
- init(error_code, message, make_format_args(args...));
- }
-
- int error_code() const { return error_code_; }
-};
-
-/**
- \rst
- Formats an error returned by an operating system or a language runtime,
- for example a file opening error, and writes it to *out* in the following
- form:
-
- .. 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``.
- If *error_code* is not a valid error code such as -1, the system message
- may look like "Unknown error -1" and is platform-dependent.
- \endrst
- */
-FMT_API void format_system_error(internal::buffer &out, int error_code,
- fmt::string_view message) FMT_NOEXCEPT;
-
-/**
- This template provides operations for formatting and writing data into a
- character range.
- */
-template <typename Range>
-class basic_writer {
- public:
- typedef typename Range::value_type char_type;
- typedef decltype(internal::declval<Range>().begin()) iterator;
- typedef basic_format_specs<char_type> format_specs;
-
- private:
- iterator out_; // Output iterator.
- internal::locale_ref locale_;
-
- // Attempts to reserve space for n extra characters in the output range.
- // Returns a pointer to the reserved range or a reference to out_.
- auto reserve(std::size_t n) -> decltype(internal::reserve(out_, n)) {
- return internal::reserve(out_, n);
- }
-
- // Writes a value in the format
- // <left-padding><value><right-padding>
- // where <value> is written by f(it).
- template <typename F>
- void write_padded(const align_spec &spec, F &&f) {
- unsigned width = spec.width(); // User-perceived width (in code points).
- size_t size = f.size(); // The number of code units.
- size_t num_code_points = width != 0 ? f.width() : size;
- if (width <= num_code_points)
- return f(reserve(size));
- auto &&it = reserve(width + (size - num_code_points));
- char_type fill = static_cast<char_type>(spec.fill());
- std::size_t padding = width - num_code_points;
- if (spec.align() == ALIGN_RIGHT) {
- it = std::fill_n(it, padding, fill);
- f(it);
- } else if (spec.align() == ALIGN_CENTER) {
- std::size_t left_padding = padding / 2;
- it = std::fill_n(it, left_padding, fill);
- f(it);
- it = std::fill_n(it, padding - left_padding, fill);
- } else {
- f(it);
- it = std::fill_n(it, padding, fill);
- }
- }
-
- template <typename F>
- struct padded_int_writer {
- size_t size_;
- string_view prefix;
- char_type fill;
- std::size_t padding;
- F f;
-
- size_t size() const { return size_; }
- size_t width() const { return size_; }
-
- template <typename It>
- void operator()(It &&it) const {
- if (prefix.size() != 0)
- it = internal::copy_str<char_type>(prefix.begin(), prefix.end(), it);
- it = std::fill_n(it, padding, fill);
- f(it);
- }
- };
-
- // Writes an integer in the format
- // <left-padding><prefix><numeric-padding><digits><right-padding>
- // where <digits> are written by f(it).
- template <typename Spec, typename F>
- void write_int(int num_digits, string_view prefix,
- const Spec &spec, F f) {
- std::size_t size = prefix.size() + internal::to_unsigned(num_digits);
- char_type fill = static_cast<char_type>(spec.fill());
- std::size_t padding = 0;
- if (spec.align() == ALIGN_NUMERIC) {
- if (spec.width() > size) {
- padding = spec.width() - size;
- size = spec.width();
- }
- } else if (spec.precision > num_digits) {
- size = prefix.size() + internal::to_unsigned(spec.precision);
- padding = internal::to_unsigned(spec.precision - num_digits);
- fill = static_cast<char_type>('0');
- }
- align_spec as = spec;
- if (spec.align() == ALIGN_DEFAULT)
- as.align_ = ALIGN_RIGHT;
- write_padded(as, padded_int_writer<F>{size, prefix, fill, padding, f});
- }
-
- // Writes a decimal integer.
- template <typename Int>
- void write_decimal(Int value) {
- typedef typename internal::int_traits<Int>::main_type main_type;
- main_type abs_value = static_cast<main_type>(value);
- bool is_negative = internal::is_negative(value);
- if (is_negative)
- abs_value = 0 - abs_value;
- int num_digits = internal::count_digits(abs_value);
- auto &&it = reserve((is_negative ? 1 : 0) + static_cast<size_t>(num_digits));
- if (is_negative)
- *it++ = static_cast<char_type>('-');
- it = internal::format_decimal<char_type>(it, abs_value, num_digits);
- }
-
- // The handle_int_type_spec handler that writes an integer.
- template <typename Int, typename Spec>
- struct int_writer {
- typedef typename internal::int_traits<Int>::main_type unsigned_type;
-
- basic_writer<Range> &writer;
- const Spec &spec;
- unsigned_type abs_value;
- char prefix[4];
- unsigned prefix_size;
-
- string_view get_prefix() const { return string_view(prefix, prefix_size); }
-
- // Counts the number of digits in abs_value. BITS = log2(radix).
- template <unsigned BITS>
- int count_digits() const {
- unsigned_type n = abs_value;
- int num_digits = 0;
- do {
- ++num_digits;
- } while ((n >>= BITS) != 0);
- return num_digits;
- }
-
- int_writer(basic_writer<Range> &w, Int value, const Spec &s)
- : writer(w), spec(s), abs_value(static_cast<unsigned_type>(value)),
- prefix_size(0) {
- if (internal::is_negative(value)) {
- prefix[0] = '-';
- ++prefix_size;
- abs_value = 0 - abs_value;
- } else if (spec.has(SIGN_FLAG)) {
- prefix[0] = spec.has(PLUS_FLAG) ? '+' : ' ';
- ++prefix_size;
- }
- }
-
- struct dec_writer {
- unsigned_type abs_value;
- int num_digits;
-
- template <typename It>
- void operator()(It &&it) const {
- it = internal::format_decimal<char_type>(it, abs_value, num_digits);
- }
- };
-
- void on_dec() {
- int num_digits = internal::count_digits(abs_value);
- writer.write_int(num_digits, get_prefix(), spec,
- dec_writer{abs_value, num_digits});
- }
-
- struct hex_writer {
- int_writer &self;
- int num_digits;
-
- template <typename It>
- void operator()(It &&it) const {
- it = internal::format_uint<4, char_type>(
- it, self.abs_value, num_digits, self.spec.type != 'x');
- }
- };
-
- void on_hex() {
- if (spec.has(HASH_FLAG)) {
- prefix[prefix_size++] = '0';
- prefix[prefix_size++] = static_cast<char>(spec.type);
- }
- int num_digits = count_digits<4>();
- writer.write_int(num_digits, get_prefix(), spec,
- hex_writer{*this, num_digits});
- }
-
- template <int BITS>
- struct bin_writer {
- unsigned_type abs_value;
- int num_digits;
-
- template <typename It>
- void operator()(It &&it) const {
- it = internal::format_uint<BITS, char_type>(it, abs_value, num_digits);
- }
- };
-
- void on_bin() {
- if (spec.has(HASH_FLAG)) {
- prefix[prefix_size++] = '0';
- prefix[prefix_size++] = static_cast<char>(spec.type);
- }
- int num_digits = count_digits<1>();
- writer.write_int(num_digits, get_prefix(), spec,
- bin_writer<1>{abs_value, num_digits});
- }
-
- void on_oct() {
- int num_digits = count_digits<3>();
- if (spec.has(HASH_FLAG) &&
- spec.precision <= num_digits) {
- // Octal prefix '0' is counted as a digit, so only add it if precision
- // is not greater than the number of digits.
- prefix[prefix_size++] = '0';
- }
- writer.write_int(num_digits, get_prefix(), spec,
- bin_writer<3>{abs_value, num_digits});
- }
-
- enum { SEP_SIZE = 1 };
-
- struct num_writer {
- unsigned_type abs_value;
- int size;
- char_type sep;
-
- template <typename It>
- void operator()(It &&it) const {
- basic_string_view<char_type> s(&sep, SEP_SIZE);
- it = internal::format_decimal<char_type>(
- it, abs_value, size, internal::add_thousands_sep<char_type>(s));
- }
- };
-
- void on_num() {
- int num_digits = internal::count_digits(abs_value);
- char_type sep = internal::thousands_sep<char_type>(writer.locale_);
- int size = num_digits + SEP_SIZE * ((num_digits - 1) / 3);
- writer.write_int(size, get_prefix(), spec,
- num_writer{abs_value, size, sep});
- }
-
- void on_error() {
- FMT_THROW(format_error("invalid type specifier"));
- }
- };
-
- // Writes a formatted integer.
- template <typename T, typename Spec>
- void write_int(T value, const Spec &spec) {
- internal::handle_int_type_spec(spec.type,
- int_writer<T, Spec>(*this, value, spec));
- }
-
- enum {INF_SIZE = 3}; // This is an enum to workaround a bug in MSVC.
-
- struct inf_or_nan_writer {
- char sign;
- const char *str;
+ FMT_CONSTEXPR void on_arg_id(basic_string_view<Char>) {
+ on_error("compile-time checks don't support named arguments");
+ }
- size_t size() const {
- return static_cast<std::size_t>(INF_SIZE + (sign ? 1 : 0));
- }
- size_t width() const { return size(); }
+ FMT_CONSTEXPR void on_replacement_field(const Char*) {}
- template <typename It>
- void operator()(It &&it) const {
- if (sign)
- *it++ = static_cast<char_type>(sign);
- it = internal::copy_str<char_type>(
- str, str + static_cast<std::size_t>(INF_SIZE), it);
- }
- };
+ FMT_CONSTEXPR const Char* on_format_specs(const Char* begin, const Char*) {
+ advance_to(context_, begin);
+ return arg_id_ < num_args ? parse_funcs_[arg_id_](context_) : begin;
+ }
- struct double_writer {
- size_t n;
- char sign;
- internal::buffer &buffer;
+ FMT_CONSTEXPR void on_error(const char* message) {
+ context_.on_error(message);
+ }
- size_t size() const { return buffer.size() + (sign ? 1 : 0); }
- size_t width() const { return size(); }
+ private:
+ using parse_context_type = basic_parse_context<Char, ErrorHandler>;
+ enum { num_args = sizeof...(Args) };
- template <typename It>
- void operator()(It &&it) {
- if (sign) {
- *it++ = static_cast<char_type>(sign);
- --n;
- }
- it = internal::copy_str<char_type>(buffer.begin(), buffer.end(), it);
- }
- };
+ FMT_CONSTEXPR void check_arg_id() {
+ if (arg_id_ >= num_args) context_.on_error("argument index out of range");
+ }
- // Formats a floating-point number (double or long double).
- template <typename T>
- void write_double(T value, const format_specs &spec);
+ // Format specifier parsing function.
+ using parse_func = const Char* (*)(parse_context_type&);
- template <typename Char>
- struct str_writer {
- const Char *s;
- size_t size_;
+ unsigned arg_id_;
+ parse_context_type context_;
+ parse_func parse_funcs_[num_args > 0 ? num_args : 1];
+};
- size_t size() const { return size_; }
- size_t width() const {
- return internal::count_code_points(basic_string_view<Char>(s, size_));
- }
+template <typename Char, typename ErrorHandler, typename... Args>
+FMT_CONSTEXPR bool do_check_format_string(basic_string_view<Char> s,
+ ErrorHandler eh = ErrorHandler()) {
+ format_string_checker<Char, ErrorHandler, Args...> checker(s, eh);
+ parse_format_string<true>(s, checker);
+ return true;
+}
- template <typename It>
- void operator()(It &&it) const {
- it = internal::copy_str<char_type>(s, s + size_, it);
- }
- };
+template <typename... Args, typename S,
+ enable_if_t<(is_compile_string<S>::value), int>>
+void check_format_string(S format_str) {
+ FMT_CONSTEXPR_DECL bool invalid_format =
+ internal::do_check_format_string<typename S::char_type,
+ internal::error_handler, Args...>(
+ to_string_view(format_str));
+ (void)invalid_format;
+}
- template <typename Char>
- friend class internal::arg_formatter_base;
+template <template <typename> class Handler, typename Spec, typename Context>
+void handle_dynamic_spec(Spec& value, arg_ref<typename Context::char_type> ref,
+ Context& ctx,
+ const typename Context::char_type* format_str) {
+ switch (ref.kind) {
+ case arg_id_kind::none:
+ break;
+ case arg_id_kind::index:
+ internal::set_dynamic_spec<Handler>(value, ctx.arg(ref.val.index),
+ ctx.error_handler());
+ break;
+ case arg_id_kind::name: {
+ const auto arg_id = ref.val.name.to_view(format_str);
+ internal::set_dynamic_spec<Handler>(value, ctx.arg(arg_id),
+ ctx.error_handler());
+ break;
+ }
+ }
+}
+} // namespace internal
- public:
- /** Constructs a ``basic_writer`` object. */
- explicit basic_writer(
- Range out, internal::locale_ref loc = internal::locale_ref())
- : out_(out.begin()), locale_(loc) {}
+template <typename Range>
+using basic_writer FMT_DEPRECATED = internal::basic_writer<Range>;
+using writer FMT_DEPRECATED = internal::writer;
+using wwriter FMT_DEPRECATED =
+ internal::basic_writer<internal::buffer_range<wchar_t>>;
- iterator out() const { return out_; }
+/** The default argument formatter. */
+template <typename Range>
+class arg_formatter : public internal::arg_formatter_base<Range> {
+ private:
+ using char_type = typename Range::value_type;
+ using base = internal::arg_formatter_base<Range>;
+ using context_type = basic_format_context<typename base::iterator, char_type>;
- void write(int value) { write_decimal(value); }
- void write(long value) { write_decimal(value); }
- void write(long long value) { write_decimal(value); }
+ context_type& ctx_;
+ basic_parse_context<char_type>* parse_ctx_;
- void write(unsigned value) { write_decimal(value); }
- void write(unsigned long value) { write_decimal(value); }
- void write(unsigned long long value) { write_decimal(value); }
+ public:
+ using range = Range;
+ using iterator = typename base::iterator;
+ using format_specs = typename base::format_specs;
/**
\rst
- Formats *value* and writes it to the buffer.
+ Constructs an argument formatter object.
+ *ctx* is a reference to the formatting context,
+ *specs* contains format specifier information for standard argument types.
\endrst
*/
- template <typename T, typename FormatSpec, typename... FormatSpecs>
- typename std::enable_if<std::is_integral<T>::value, void>::type
- write(T value, FormatSpec spec, FormatSpecs... specs) {
- format_specs s(spec, specs...);
- s.align_ = ALIGN_RIGHT;
- write_int(value, s);
- }
+ explicit arg_formatter(context_type& ctx,
+ basic_parse_context<char_type>* parse_ctx = nullptr,
+ format_specs* specs = nullptr)
+ : base(Range(ctx.out()), specs, ctx.locale()),
+ ctx_(ctx),
+ parse_ctx_(parse_ctx) {}
- void write(double value) {
- write_double(value, format_specs());
- }
+ using base::operator();
- /**
- \rst
- Formats *value* using the general format for floating-point numbers
- (``'g'``) and writes it to the buffer.
- \endrst
- */
- void write(long double value) {
- write_double(value, format_specs());
+ /** Formats an argument of a user-defined type. */
+ iterator operator()(typename basic_format_arg<context_type>::handle handle) {
+ handle.format(*parse_ctx_, ctx_);
+ return this->out();
}
+};
- /** Writes a character to the buffer. */
- void write(char value) {
- *reserve(1) = value;
- }
- void write(wchar_t value) {
- static_assert(std::is_same<char_type, wchar_t>::value, "");
- *reserve(1) = value;
- }
+/**
+ An error returned by an operating system or a language runtime,
+ for example a file opening error.
+*/
+class FMT_API system_error : public std::runtime_error {
+ private:
+ void init(int err_code, string_view format_str, format_args args);
+
+ protected:
+ int error_code_;
+
+ system_error() : std::runtime_error(""), error_code_(0) {}
+ public:
/**
- \rst
- Writes *value* to the buffer.
- \endrst
- */
- void write(string_view value) {
- auto &&it = reserve(value.size());
- it = internal::copy_str<char_type>(value.begin(), value.end(), it);
- }
- void write(wstring_view value) {
- static_assert(std::is_same<char_type, wchar_t>::value, "");
- auto &&it = reserve(value.size());
- it = std::copy(value.begin(), value.end(), it);
- }
+ \rst
+ Constructs a :class:`fmt::system_error` object with a description
+ formatted with `fmt::format_system_error`. *message* and additional
+ arguments passed into the constructor are formatted similarly to
+ `fmt::format`.
- // Writes a formatted string.
- template <typename Char>
- void write(const Char *s, std::size_t size, const align_spec &spec) {
- write_padded(spec, str_writer<Char>{s, size});
- }
+ **Example**::
- template <typename Char>
- void write(basic_string_view<Char> s,
- const format_specs &spec = format_specs()) {
- const Char *data = s.data();
- std::size_t size = s.size();
- if (spec.precision >= 0 && internal::to_unsigned(spec.precision) < size)
- size = internal::to_unsigned(spec.precision);
- write(data, size, spec);
+ // This throws a 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... Args>
+ system_error(int error_code, string_view message, const Args&... args)
+ : std::runtime_error("") {
+ init(error_code, message, make_format_args(args...));
}
+ ~system_error() FMT_NOEXCEPT;
- template <typename T>
- typename std::enable_if<std::is_same<T, void>::value>::type
- write(const T *p) {
- format_specs specs;
- specs.flags = HASH_FLAG;
- specs.type = 'x';
- write_int(reinterpret_cast<uintptr_t>(p), specs);
- }
+ int error_code() const { return error_code_; }
};
+/**
+ \rst
+ Formats an error returned by an operating system or a language runtime,
+ for example a file opening error, and writes it to *out* in the following
+ form:
+
+ .. 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``.
+ If *error_code* is not a valid error code such as -1, the system message
+ may look like "Unknown error -1" and is platform-dependent.
+ \endrst
+ */
+FMT_API void format_system_error(internal::buffer<char>& out, int error_code,
+ fmt::string_view message) FMT_NOEXCEPT;
+
struct float_spec_handler {
char type;
bool upper;
+ bool fixed;
+ bool as_percentage;
+ bool use_locale;
- explicit float_spec_handler(char t) : type(t), upper(false) {}
+ explicit float_spec_handler(char t)
+ : type(t),
+ upper(false),
+ fixed(false),
+ as_percentage(false),
+ use_locale(false) {}
void on_general() {
- if (type == 'G')
- upper = true;
- else
- type = 'g';
+ if (type == 'G') upper = true;
}
void on_exp() {
- if (type == 'E')
- upper = true;
+ if (type == 'E') upper = true;
}
void on_fixed() {
- if (type == 'F') {
- upper = true;
-#if FMT_MSC_VER
- // MSVC's printf doesn't support 'F'.
- type = 'f';
-#endif
- }
+ fixed = true;
+ if (type == 'F') upper = true;
+ }
+
+ void on_percent() {
+ fixed = true;
+ as_percentage = true;
}
void on_hex() {
- if (type == 'A')
- upper = true;
+ if (type == 'A') upper = true;
}
- void on_error() {
+ void on_num() { use_locale = true; }
+
+ FMT_NORETURN void on_error() {
FMT_THROW(format_error("invalid type specifier"));
}
};
template <typename Range>
-template <typename T>
-void basic_writer<Range>::write_double(T value, const format_specs &spec) {
+template <typename T, bool USE_GRISU>
+void internal::basic_writer<Range>::write_double(T value,
+ const format_specs& specs) {
// Check type.
- float_spec_handler handler(static_cast<char>(spec.type));
+ float_spec_handler handler(static_cast<char>(specs.type));
internal::handle_float_type_spec(handler.type, handler);
char sign = 0;
- // Use signbit instead of value < 0 because the latter is always
- // false for NaN.
+ // Use signbit instead of value < 0 since the latter is always false for NaN.
if (std::signbit(value)) {
sign = '-';
value = -value;
- } else if (spec.has(SIGN_FLAG)) {
- sign = spec.has(PLUS_FLAG) ? '+' : ' ';
+ } else if (specs.sign != sign::none) {
+ if (specs.sign == sign::plus)
+ sign = '+';
+ else if (specs.sign == sign::space)
+ sign = ' ';
}
- struct write_inf_or_nan_t {
- basic_writer &writer;
- format_specs spec;
- char sign;
- void operator()(const char *str) const {
- writer.write_padded(spec, inf_or_nan_writer{sign, str});
- }
- } write_inf_or_nan = {*this, spec, sign};
+ if (!std::isfinite(value)) {
+ // Format infinity and NaN ourselves because sprintf's output is not
+ // consistent across platforms.
+ const char* str = std::isinf(value) ? (handler.upper ? "INF" : "inf")
+ : (handler.upper ? "NAN" : "nan");
+ return write_padded(specs,
+ inf_or_nan_writer{sign, handler.as_percentage, str});
+ }
- // Format NaN and ininity ourselves because sprintf's output is not consistent
- // across platforms.
- if (internal::fputil::isnotanumber(value))
- return write_inf_or_nan(handler.upper ? "NAN" : "nan");
- if (internal::fputil::isinfinity(value))
- return write_inf_or_nan(handler.upper ? "INF" : "inf");
+ if (handler.as_percentage) value *= 100;
memory_buffer buffer;
- bool use_grisu = FMT_USE_GRISU && sizeof(T) <= sizeof(double) &&
- spec.type != 'a' && spec.type != 'A' &&
- internal::grisu2_format(static_cast<double>(value), buffer, spec);
- if (!use_grisu) {
- format_specs normalized_spec(spec);
- normalized_spec.type = handler.type;
- internal::sprintf_format(value, buffer, normalized_spec);
- }
- size_t n = buffer.size();
- align_spec as = spec;
- if (spec.align() == ALIGN_NUMERIC) {
+ int exp = 0;
+ int precision = specs.precision >= 0 || !specs.type ? specs.precision : 6;
+ unsigned options = handler.fixed ? internal::grisu_options::fixed : 0;
+ bool use_grisu = USE_GRISU &&
+ (specs.type != 'a' && specs.type != 'A' &&
+ specs.type != 'e' && specs.type != 'E') &&
+ internal::grisu_format(static_cast<double>(value), buffer,
+ precision, options, exp);
+ char* decimal_point_pos = nullptr;
+ if (!use_grisu)
+ decimal_point_pos = internal::sprintf_format(value, buffer, specs);
+
+ if (handler.as_percentage) {
+ buffer.push_back('%');
+ --exp; // Adjust decimal place position.
+ }
+ format_specs as = specs;
+ if (specs.align == align::numeric) {
if (sign) {
- auto &&it = reserve(1);
+ auto&& it = reserve(1);
*it++ = static_cast<char_type>(sign);
sign = 0;
- if (as.width_)
- --as.width_;
+ if (as.width) --as.width;
}
- as.align_ = ALIGN_RIGHT;
+ as.align = align::right;
+ } else if (specs.align == align::none) {
+ as.align = align::right;
+ }
+ char_type decimal_point = handler.use_locale
+ ? internal::decimal_point<char_type>(locale_)
+ : static_cast<char_type>('.');
+ if (use_grisu) {
+ auto params = internal::gen_digits_params();
+ params.fixed = handler.fixed;
+ params.num_digits = precision;
+ params.trailing_zeros =
+ (precision != 0 && (handler.fixed || !specs.type)) || specs.alt;
+ write_padded(as, grisu_writer(sign, buffer, exp, params, decimal_point));
} else {
- if (spec.align() == ALIGN_DEFAULT)
- as.align_ = ALIGN_RIGHT;
- if (sign)
- ++n;
+ write_padded(as,
+ double_writer{sign, buffer, decimal_point_pos, decimal_point});
}
- write_padded(as, double_writer{n, sign, buffer});
}
// Reports a system error without throwing an exception.
\endrst
*/
template <typename... Args>
- windows_error(int error_code, string_view message, const Args &... args) {
+ windows_error(int error_code, string_view message, const Args&... args) {
init(error_code, message, make_format_args(args...));
}
};
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_;
+ enum { buffer_size = std::numeric_limits<unsigned long long>::digits10 + 3 };
+ mutable char buffer_[buffer_size];
+ char* str_;
// Formats value in reverse and returns a pointer to the beginning.
- char *format_decimal(unsigned long long value) {
- char *ptr = buffer_ + (BUFFER_SIZE - 1); // Parens to workaround MSVC bug.
+ char* format_decimal(unsigned long long value) {
+ char* ptr = buffer_ + (buffer_size - 1); // Parens to workaround MSVC bug.
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.
unsigned index = static_cast<unsigned>((value % 100) * 2);
value /= 100;
- *--ptr = internal::data::DIGITS[index + 1];
- *--ptr = internal::data::DIGITS[index];
+ *--ptr = internal::data::digits[index + 1];
+ *--ptr = internal::data::digits[index];
}
if (value < 10) {
*--ptr = static_cast<char>('0' + value);
return ptr;
}
unsigned index = static_cast<unsigned>(value * 2);
- *--ptr = internal::data::DIGITS[index + 1];
- *--ptr = internal::data::DIGITS[index];
+ *--ptr = internal::data::digits[index + 1];
+ *--ptr = internal::data::digits[index];
return ptr;
}
void format_signed(long long value) {
unsigned long long abs_value = static_cast<unsigned long long>(value);
bool negative = value < 0;
- if (negative)
- abs_value = 0 - abs_value;
+ if (negative) abs_value = 0 - abs_value;
str_ = format_decimal(abs_value);
- if (negative)
- *--str_ = '-';
+ if (negative) *--str_ = '-';
}
public:
/** Returns the number of characters written to the output buffer. */
std::size_t size() const {
- return internal::to_unsigned(buffer_ - str_ + BUFFER_SIZE - 1);
+ return internal::to_unsigned(buffer_ - str_ + buffer_size - 1);
}
/**
Returns a pointer to the output buffer content. No terminating null
character is appended.
*/
- const char *data() const { return str_; }
+ const char* data() const { return str_; }
/**
Returns a pointer to the output buffer content with terminating null
character appended.
*/
- const char *c_str() const {
- buffer_[BUFFER_SIZE - 1] = '\0';
+ const char* c_str() const {
+ buffer_[buffer_size - 1] = '\0';
return str_;
}
std::string str() const { return std::string(str_, size()); }
};
-// DEPRECATED!
-// Formats a decimal integer value writing into buffer and returns
-// a pointer to the end of the formatted string. This function doesn't
-// write a terminating null character.
-template <typename T>
-inline void format_decimal(char *&buffer, T value) {
- typedef typename internal::int_traits<T>::main_type main_type;
- main_type abs_value = static_cast<main_type>(value);
- if (internal::is_negative(value)) {
- *buffer++ = '-';
- abs_value = 0 - abs_value;
- }
- if (abs_value < 100) {
- if (abs_value < 10) {
- *buffer++ = static_cast<char>('0' + abs_value);
- return;
- }
- unsigned index = static_cast<unsigned>(abs_value * 2);
- *buffer++ = internal::data::DIGITS[index];
- *buffer++ = internal::data::DIGITS[index + 1];
- return;
- }
- int num_digits = internal::count_digits(abs_value);
- internal::format_decimal<char>(
- internal::make_checked(buffer, internal::to_unsigned(num_digits)), abs_value, num_digits);
- buffer += num_digits;
-}
-
-// Formatter of objects of type T.
+// A formatter specialization for the core types corresponding to internal::type
+// constants.
template <typename T, typename Char>
-struct formatter<
- T, Char,
- typename std::enable_if<internal::format_type<
- typename buffer_context<Char>::type, T>::value>::type> {
+struct formatter<T, Char,
+ enable_if_t<internal::type_constant<T, Char>::value !=
+ internal::custom_type>> {
+ FMT_CONSTEXPR formatter() : format_str_(nullptr) {}
// Parses format specifiers stopping either at the end of the range or at the
// terminating '}'.
template <typename ParseContext>
- FMT_CONSTEXPR typename ParseContext::iterator parse(ParseContext &ctx) {
- typedef internal::dynamic_specs_handler<ParseContext> handler_type;
- auto type = internal::get_type<
- typename buffer_context<Char>::type, T>::value;
- internal::specs_checker<handler_type>
- handler(handler_type(specs_, ctx), type);
+ FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+ format_str_ = ctx.begin();
+ using handler_type = internal::dynamic_specs_handler<ParseContext>;
+ auto type = internal::type_constant<T, Char>::value;
+ internal::specs_checker<handler_type> handler(handler_type(specs_, ctx),
+ type);
auto it = parse_format_specs(ctx.begin(), ctx.end(), handler);
- auto type_spec = specs_.type;
auto eh = ctx.error_handler();
switch (type) {
case internal::none_type:
case internal::long_long_type:
case internal::ulong_long_type:
case internal::bool_type:
- handle_int_type_spec(
- type_spec, internal::int_type_checker<decltype(eh)>(eh));
+ handle_int_type_spec(specs_.type,
+ internal::int_type_checker<decltype(eh)>(eh));
break;
case internal::char_type:
handle_char_specs(
- &specs_,
- internal::char_specs_checker<decltype(eh)>(type_spec, eh));
+ &specs_, internal::char_specs_checker<decltype(eh)>(specs_.type, eh));
break;
case internal::double_type:
case internal::long_double_type:
- handle_float_type_spec(
- type_spec, internal::float_type_checker<decltype(eh)>(eh));
+ handle_float_type_spec(specs_.type,
+ internal::float_type_checker<decltype(eh)>(eh));
break;
case internal::cstring_type:
internal::handle_cstring_type_spec(
- type_spec, internal::cstring_type_checker<decltype(eh)>(eh));
+ specs_.type, internal::cstring_type_checker<decltype(eh)>(eh));
break;
case internal::string_type:
- internal::check_string_type_spec(type_spec, eh);
+ internal::check_string_type_spec(specs_.type, eh);
break;
case internal::pointer_type:
- internal::check_pointer_type_spec(type_spec, eh);
+ internal::check_pointer_type_spec(specs_.type, eh);
break;
case internal::custom_type:
// Custom format specifiers should be checked in parse functions of
}
template <typename FormatContext>
- auto format(const T &val, FormatContext &ctx) -> decltype(ctx.out()) {
+ auto format(const T& val, FormatContext& ctx) -> decltype(ctx.out()) {
internal::handle_dynamic_spec<internal::width_checker>(
- specs_.width_, specs_.width_ref, ctx);
+ specs_.width, specs_.width_ref, ctx, format_str_);
internal::handle_dynamic_spec<internal::precision_checker>(
- specs_.precision, specs_.precision_ref, ctx);
- typedef output_range<typename FormatContext::iterator,
- typename FormatContext::char_type> range_type;
- return visit_format_arg(arg_formatter<range_type>(ctx, &specs_),
- internal::make_arg<FormatContext>(val));
+ specs_.precision, specs_.precision_ref, ctx, format_str_);
+ using range_type =
+ internal::output_range<typename FormatContext::iterator,
+ typename FormatContext::char_type>;
+ return visit_format_arg(arg_formatter<range_type>(ctx, nullptr, &specs_),
+ internal::make_arg<FormatContext>(val));
}
private:
internal::dynamic_format_specs<Char> specs_;
+ const Char* format_str_;
+};
+
+#define FMT_FORMAT_AS(Type, Base) \
+ template <typename Char> \
+ struct formatter<Type, Char> : formatter<Base, Char> { \
+ template <typename FormatContext> \
+ auto format(const Type& val, FormatContext& ctx) -> decltype(ctx.out()) { \
+ return formatter<Base, Char>::format(val, ctx); \
+ } \
+ }
+
+FMT_FORMAT_AS(signed char, int);
+FMT_FORMAT_AS(unsigned char, unsigned);
+FMT_FORMAT_AS(short, int);
+FMT_FORMAT_AS(unsigned short, unsigned);
+FMT_FORMAT_AS(long, long long);
+FMT_FORMAT_AS(unsigned long, unsigned long long);
+FMT_FORMAT_AS(float, double);
+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(internal::std_string_view<Char>, basic_string_view<Char>);
+
+template <typename Char>
+struct formatter<void*, Char> : formatter<const void*, Char> {
+ template <typename FormatContext>
+ auto format(void* val, FormatContext& ctx) -> decltype(ctx.out()) {
+ return formatter<const void*, Char>::format(val, ctx);
+ }
+};
+
+template <typename Char, size_t N>
+struct formatter<Char[N], Char> : formatter<basic_string_view<Char>, Char> {
+ template <typename FormatContext>
+ auto format(const Char* val, FormatContext& ctx) -> decltype(ctx.out()) {
+ return formatter<basic_string_view<Char>, Char>::format(val, ctx);
+ }
};
// A formatter for types known only at run time such as variant alternatives.
//
// Usage:
-// typedef std::variant<int, std::string> variant;
+// using variant = std::variant<int, std::string>;
// template <>
// struct formatter<variant>: dynamic_formatter<> {
// void format(buffer &buf, const variant &v, context &ctx) {
// visit([&](const auto &val) { format(buf, val, ctx); }, v);
// }
// };
-template <typename Char = char>
-class dynamic_formatter {
+template <typename Char = char> class dynamic_formatter {
private:
- struct null_handler: internal::error_handler {
- void on_align(alignment) {}
+ struct null_handler : internal::error_handler {
+ void on_align(align_t) {}
void on_plus() {}
void on_minus() {}
void on_space() {}
public:
template <typename ParseContext>
- auto parse(ParseContext &ctx) -> decltype(ctx.begin()) {
+ auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+ format_str_ = ctx.begin();
// Checks are deferred to formatting time when the argument type is known.
internal::dynamic_specs_handler<ParseContext> handler(specs_, ctx);
return parse_format_specs(ctx.begin(), ctx.end(), handler);
}
template <typename T, typename FormatContext>
- auto format(const T &val, FormatContext &ctx) -> decltype(ctx.out()) {
+ auto format(const T& val, FormatContext& ctx) -> decltype(ctx.out()) {
handle_specs(ctx);
- internal::specs_checker<null_handler>
- checker(null_handler(), internal::get_type<FormatContext, T>::value);
- checker.on_align(specs_.align());
- if (specs_.flags == 0); // Do nothing.
- else if (specs_.has(SIGN_FLAG))
- specs_.has(PLUS_FLAG) ? checker.on_plus() : checker.on_space();
- else if (specs_.has(MINUS_FLAG))
+ internal::specs_checker<null_handler> checker(
+ null_handler(),
+ internal::mapped_type_constant<T, FormatContext>::value);
+ checker.on_align(specs_.align);
+ switch (specs_.sign) {
+ case sign::none:
+ break;
+ case sign::plus:
+ checker.on_plus();
+ break;
+ case sign::minus:
checker.on_minus();
- else if (specs_.has(HASH_FLAG))
- checker.on_hash();
- if (specs_.precision != -1)
- checker.end_precision();
- typedef output_range<typename FormatContext::iterator,
- typename FormatContext::char_type> range;
- visit_format_arg(arg_formatter<range>(ctx, &specs_),
- internal::make_arg<FormatContext>(val));
+ break;
+ case sign::space:
+ checker.on_space();
+ break;
+ }
+ if (specs_.alt) checker.on_hash();
+ if (specs_.precision >= 0) checker.end_precision();
+ using range = internal::output_range<typename FormatContext::iterator,
+ typename FormatContext::char_type>;
+ visit_format_arg(arg_formatter<range>(ctx, nullptr, &specs_),
+ internal::make_arg<FormatContext>(val));
return ctx.out();
}
private:
- template <typename Context>
- void handle_specs(Context &ctx) {
+ template <typename Context> void handle_specs(Context& ctx) {
internal::handle_dynamic_spec<internal::width_checker>(
- specs_.width_, specs_.width_ref, ctx);
+ specs_.width, specs_.width_ref, ctx, format_str_);
internal::handle_dynamic_spec<internal::precision_checker>(
- specs_.precision, specs_.precision_ref, ctx);
+ specs_.precision, specs_.precision_ref, ctx, format_str_);
}
internal::dynamic_format_specs<Char> specs_;
+ const Char* format_str_;
};
template <typename Range, typename Char>
typename basic_format_context<Range, Char>::format_arg
- basic_format_context<Range, Char>::get_arg(
- basic_string_view<char_type> name) {
- map_.init(this->args());
+basic_format_context<Range, Char>::arg(basic_string_view<char_type> name) {
+ map_.init(args_);
format_arg arg = map_.find(name);
- if (arg.type() == internal::none_type)
- this->on_error("argument not found");
+ if (arg.type() == internal::none_type) this->on_error("argument not found");
return arg;
}
+template <typename Char, typename ErrorHandler>
+FMT_CONSTEXPR void advance_to(basic_parse_context<Char, ErrorHandler>& ctx,
+ const Char* p) {
+ ctx.advance_to(ctx.begin() + (p - &*ctx.begin()));
+}
+
template <typename ArgFormatter, typename Char, typename Context>
struct format_handler : internal::error_handler {
- typedef typename ArgFormatter::range range;
+ using range = typename ArgFormatter::range;
format_handler(range r, basic_string_view<Char> str,
basic_format_args<Context> format_args,
internal::locale_ref loc)
- : context(r.begin(), str, format_args, loc) {}
+ : parse_context(str), context(r.begin(), format_args, loc) {}
- void on_text(const Char *begin, const Char *end) {
+ void on_text(const Char* begin, const Char* end) {
auto size = internal::to_unsigned(end - begin);
auto out = context.out();
- auto &&it = internal::reserve(out, size);
+ auto&& it = internal::reserve(out, size);
it = std::copy_n(begin, size, it);
context.advance_to(out);
}
- void on_arg_id() { arg = context.next_arg(); }
- void on_arg_id(unsigned id) {
- context.parse_context().check_arg_id(id);
- arg = context.get_arg(id);
- }
- void on_arg_id(basic_string_view<Char> id) {
- arg = context.get_arg(id);
+ void get_arg(int id) { arg = internal::get_arg(context, id); }
+
+ void on_arg_id() { get_arg(parse_context.next_arg_id()); }
+ void on_arg_id(int id) {
+ parse_context.check_arg_id(id);
+ get_arg(id);
}
+ void on_arg_id(basic_string_view<Char> id) { arg = context.arg(id); }
- void on_replacement_field(const Char *p) {
- context.parse_context().advance_to(p);
- internal::custom_formatter<Char, Context> f(context);
+ void on_replacement_field(const Char* p) {
+ advance_to(parse_context, p);
+ internal::custom_formatter<Context> f(parse_context, context);
if (!visit_format_arg(f, arg))
- context.advance_to(visit_format_arg(ArgFormatter(context), arg));
+ context.advance_to(
+ visit_format_arg(ArgFormatter(context, &parse_context), arg));
}
- const Char *on_format_specs(const Char *begin, const Char *end) {
- auto &parse_ctx = context.parse_context();
- parse_ctx.advance_to(begin);
- internal::custom_formatter<Char, Context> f(context);
- if (visit_format_arg(f, arg))
- return parse_ctx.begin();
+ const Char* on_format_specs(const Char* begin, const Char* end) {
+ advance_to(parse_context, begin);
+ internal::custom_formatter<Context> f(parse_context, context);
+ if (visit_format_arg(f, arg)) return parse_context.begin();
basic_format_specs<Char> specs;
using internal::specs_handler;
- internal::specs_checker<specs_handler<Context>>
- handler(specs_handler<Context>(specs, context), arg.type());
+ using parse_context_t = basic_parse_context<Char>;
+ internal::specs_checker<specs_handler<parse_context_t, Context>> handler(
+ specs_handler<parse_context_t, Context>(specs, parse_context, context),
+ arg.type());
begin = parse_format_specs(begin, end, handler);
- if (begin == end || *begin != '}')
- on_error("missing '}' in format string");
- parse_ctx.advance_to(begin);
- context.advance_to(visit_format_arg(ArgFormatter(context, &specs), arg));
+ if (begin == end || *begin != '}') on_error("missing '}' in format string");
+ advance_to(parse_context, begin);
+ context.advance_to(
+ visit_format_arg(ArgFormatter(context, &parse_context, &specs), arg));
return begin;
}
+ basic_parse_context<Char> parse_context;
Context context;
basic_format_arg<Context> arg;
};
/** Formats arguments and writes the output to the range. */
template <typename ArgFormatter, typename Char, typename Context>
typename Context::iterator vformat_to(
- typename ArgFormatter::range out,
- basic_string_view<Char> format_str,
+ typename ArgFormatter::range out, basic_string_view<Char> format_str,
basic_format_args<Context> args,
internal::locale_ref loc = internal::locale_ref()) {
format_handler<ArgFormatter, Char, Context> h(out, format_str, args, loc);
// Casts ``p`` to ``const void*`` for pointer formatting.
// Example:
// auto s = format("{}", ptr(p));
-template <typename T>
-inline const void *ptr(const T *p) { return p; }
+template <typename T> inline const void* ptr(const T* p) { return p; }
+template <typename T> inline const void* ptr(const std::unique_ptr<T>& p) {
+ return p.get();
+}
+template <typename T> inline const void* ptr(const std::shared_ptr<T>& p) {
+ return p.get();
+}
-template <typename It, typename Char>
-struct arg_join {
+template <typename It, typename Char> struct arg_join : internal::view {
It begin;
It end;
basic_string_view<Char> sep;
- arg_join(It begin, It end, basic_string_view<Char> sep)
- : begin(begin), end(end), sep(sep) {}
+ arg_join(It b, It e, basic_string_view<Char> s) : begin(b), end(e), sep(s) {}
};
template <typename It, typename Char>
-struct formatter<arg_join<It, Char>, Char>:
- formatter<typename std::iterator_traits<It>::value_type, Char> {
+struct formatter<arg_join<It, Char>, Char>
+ : formatter<typename std::iterator_traits<It>::value_type, Char> {
template <typename FormatContext>
- auto format(const arg_join<It, Char> &value, FormatContext &ctx)
+ auto format(const arg_join<It, Char>& value, FormatContext& ctx)
-> decltype(ctx.out()) {
- typedef formatter<typename std::iterator_traits<It>::value_type, Char> base;
+ using base = formatter<typename std::iterator_traits<It>::value_type, Char>;
auto it = value.begin;
auto out = ctx.out();
if (it != value.end) {
}
};
+/**
+ Returns an object that formats the iterator range `[begin, end)` with elements
+ separated by `sep`.
+ */
template <typename It>
arg_join<It, char> join(It begin, It end, string_view sep) {
- return arg_join<It, char>(begin, end, sep);
+ return {begin, end, sep};
}
template <typename It>
arg_join<It, wchar_t> join(It begin, It end, wstring_view sep) {
- return arg_join<It, wchar_t>(begin, end, sep);
+ return {begin, end, sep};
}
-// The following causes ICE in gcc 4.4.
-#if FMT_USE_TRAILING_RETURN && (!FMT_GCC_VERSION || FMT_GCC_VERSION >= 405)
+/**
+ \rst
+ Returns an object 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"
+ \endrst
+ */
template <typename Range>
-auto join(const Range &range, string_view sep)
- -> arg_join<decltype(internal::begin(range)), char> {
- return join(internal::begin(range), internal::end(range), sep);
+arg_join<internal::iterator_t<const Range>, char> join(const Range& range,
+ string_view sep) {
+ return join(std::begin(range), std::end(range), sep);
}
template <typename Range>
-auto join(const Range &range, wstring_view sep)
- -> arg_join<decltype(internal::begin(range)), wchar_t> {
- return join(internal::begin(range), internal::end(range), sep);
+arg_join<internal::iterator_t<const Range>, wchar_t> join(const Range& range,
+ wstring_view sep) {
+ return join(std::begin(range), std::end(range), sep);
}
-#endif
/**
\rst
std::string answer = fmt::to_string(42);
\endrst
*/
-template <typename T>
-std::string to_string(const T &value) {
- std::string str;
- internal::container_buffer<std::string> buf(str);
- writer(buf).write(value);
- return str;
+template <typename T> inline std::string to_string(const T& value) {
+ return format("{}", value);
}
/**
Converts *value* to ``std::wstring`` using the default format for type *T*.
*/
-template <typename T>
-std::wstring to_wstring(const T &value) {
- std::wstring str;
- internal::container_buffer<std::wstring> buf(str);
- wwriter(buf).write(value);
- return str;
+template <typename T> inline std::wstring to_wstring(const T& value) {
+ return format(L"{}", value);
}
template <typename Char, std::size_t SIZE>
-std::basic_string<Char> to_string(const basic_memory_buffer<Char, SIZE> &buf) {
+std::basic_string<Char> to_string(const basic_memory_buffer<Char, SIZE>& buf) {
return std::basic_string<Char>(buf.data(), buf.size());
}
template <typename Char>
-typename buffer_context<Char>::type::iterator internal::vformat_to(
- internal::basic_buffer<Char> &buf, basic_string_view<Char> format_str,
- basic_format_args<typename buffer_context<Char>::type> args) {
- typedef back_insert_range<internal::basic_buffer<Char> > range;
- return vformat_to<arg_formatter<range>>(
- buf, to_string_view(format_str), args);
-}
-
-template <typename S, typename Char = FMT_CHAR(S)>
-inline typename buffer_context<Char>::type::iterator vformat_to(
- internal::basic_buffer<Char> &buf, const S &format_str,
- basic_format_args<typename buffer_context<Char>::type> args) {
+typename buffer_context<Char>::iterator internal::vformat_to(
+ internal::buffer<Char>& buf, basic_string_view<Char> format_str,
+ basic_format_args<buffer_context<Char>> args) {
+ using range = buffer_range<Char>;
+ return vformat_to<arg_formatter<range>>(buf, to_string_view(format_str),
+ args);
+}
+
+template <typename S, typename Char = char_t<S>,
+ FMT_ENABLE_IF(internal::is_string<S>::value)>
+inline typename buffer_context<Char>::iterator vformat_to(
+ internal::buffer<Char>& buf, const S& format_str,
+ basic_format_args<buffer_context<Char>> args) {
return internal::vformat_to(buf, to_string_view(format_str), args);
}
-template <
- typename S, typename... Args,
- std::size_t SIZE = inline_buffer_size,
- typename Char = typename internal::char_t<S>::type>
-inline typename buffer_context<Char>::type::iterator format_to(
- basic_memory_buffer<Char, SIZE> &buf, const S &format_str,
- const Args &... args) {
+template <typename S, typename... Args, std::size_t SIZE = inline_buffer_size,
+ typename Char = enable_if_t<internal::is_string<S>::value, char_t<S>>>
+inline typename buffer_context<Char>::iterator format_to(
+ basic_memory_buffer<Char, SIZE>& buf, const S& format_str, Args&&... args) {
internal::check_format_string<Args...>(format_str);
- typedef typename buffer_context<Char>::type context;
- format_arg_store<context, Args...> as{args...};
+ using context = buffer_context<Char>;
return internal::vformat_to(buf, to_string_view(format_str),
- basic_format_args<context>(as));
+ {make_format_args<context>(args...)});
}
-namespace internal {
-
-// Detect the iterator category of *any* given type in a SFINAE-friendly way.
-// Unfortunately, older implementations of std::iterator_traits are not safe
-// for use in a SFINAE-context.
-
-// the gist of C++17's void_t magic
-template<typename... Ts>
-struct void_ { typedef void type; };
-
-template <typename T, typename Enable = void>
-struct it_category : std::false_type {};
-
-template <typename T>
-struct it_category<T*> { typedef std::random_access_iterator_tag type; };
-
-template <typename T>
-struct it_category<T, typename void_<typename T::iterator_category>::type> {
- typedef typename T::iterator_category type;
-};
-
-// Detect if *any* given type models the OutputIterator concept.
-template <typename It>
-class is_output_iterator {
- // Check for mutability because all iterator categories derived from
- // std::input_iterator_tag *may* also meet the requirements of an
- // OutputIterator, thereby falling into the category of 'mutable iterators'
- // [iterator.requirements.general] clause 4.
- // The compiler reveals this property only at the point of *actually
- // dereferencing* the iterator!
- template <typename U>
- static decltype(*(internal::declval<U>())) test(std::input_iterator_tag);
- template <typename U>
- static char& test(std::output_iterator_tag);
- template <typename U>
- static const char& test(...);
-
- typedef decltype(test<It>(typename it_category<It>::type{})) type;
- typedef typename std::remove_reference<type>::type result;
- public:
- static const bool value = !std::is_const<result>::value;
-};
-} // internal
-
template <typename OutputIt, typename Char = char>
-//using format_context_t = basic_format_context<OutputIt, Char>;
-struct format_context_t { typedef basic_format_context<OutputIt, Char> type; };
+using format_context_t = basic_format_context<OutputIt, Char>;
template <typename OutputIt, typename Char = char>
-//using format_args_t = basic_format_args<format_context_t<OutputIt, Char>>;
-struct format_args_t {
- typedef basic_format_args<
- typename format_context_t<OutputIt, Char>::type> type;
-};
-
-template <typename String, typename OutputIt, typename... Args>
-inline typename std::enable_if<internal::is_output_iterator<OutputIt>::value,
- OutputIt>::type
- vformat_to(OutputIt out, const String &format_str,
- typename format_args_t<OutputIt, FMT_CHAR(String)>::type args) {
- typedef output_range<OutputIt, FMT_CHAR(String)> range;
+using format_args_t = basic_format_args<format_context_t<OutputIt, Char>>;
+
+template <typename S, typename OutputIt, typename... Args,
+ FMT_ENABLE_IF(
+ internal::is_output_iterator<OutputIt>::value &&
+ !internal::is_contiguous_back_insert_iterator<OutputIt>::value)>
+inline OutputIt vformat_to(OutputIt out, const S& format_str,
+ format_args_t<OutputIt, char_t<S>> args) {
+ using range = internal::output_range<OutputIt, char_t<S>>;
return vformat_to<arg_formatter<range>>(range(out),
to_string_view(format_str), args);
}
fmt::format_to(std::back_inserter(out), "{}", 42);
\endrst
*/
-template <typename OutputIt, typename S, typename... Args>
-inline FMT_ENABLE_IF_T(
- internal::is_string<S>::value &&
- internal::is_output_iterator<OutputIt>::value, OutputIt)
- format_to(OutputIt out, const S &format_str, const Args &... args) {
+template <typename OutputIt, typename S, typename... Args,
+ FMT_ENABLE_IF(
+ internal::is_output_iterator<OutputIt>::value &&
+ !internal::is_contiguous_back_insert_iterator<OutputIt>::value &&
+ internal::is_string<S>::value)>
+inline OutputIt format_to(OutputIt out, const S& format_str, Args&&... args) {
internal::check_format_string<Args...>(format_str);
- typedef typename format_context_t<OutputIt, FMT_CHAR(S)>::type context;
- format_arg_store<context, Args...> as{args...};
+ using context = format_context_t<OutputIt, char_t<S>>;
return vformat_to(out, to_string_view(format_str),
- basic_format_args<context>(as));
+ {make_format_args<context>(args...)});
}
-template <typename OutputIt>
-struct format_to_n_result {
+template <typename OutputIt> struct format_to_n_result {
/** Iterator past the end of the output range. */
OutputIt out;
/** Total (not truncated) output size. */
};
template <typename OutputIt, typename Char = typename OutputIt::value_type>
-struct format_to_n_context :
- format_context_t<fmt::internal::truncating_iterator<OutputIt>, Char> {};
+using format_to_n_context =
+ format_context_t<fmt::internal::truncating_iterator<OutputIt>, Char>;
template <typename OutputIt, typename Char = typename OutputIt::value_type>
-struct format_to_n_args {
- typedef basic_format_args<
- typename format_to_n_context<OutputIt, Char>::type> type;
-};
+using format_to_n_args = basic_format_args<format_to_n_context<OutputIt, Char>>;
-template <typename OutputIt, typename Char, typename ...Args>
-inline format_arg_store<
- typename format_to_n_context<OutputIt, Char>::type, Args...>
- make_format_to_n_args(const Args &... args) {
- return format_arg_store<
- typename format_to_n_context<OutputIt, Char>::type, Args...>(args...);
+template <typename OutputIt, typename Char, typename... Args>
+inline format_arg_store<format_to_n_context<OutputIt, Char>, Args...>
+make_format_to_n_args(const Args&... args) {
+ return format_arg_store<format_to_n_context<OutputIt, Char>, Args...>(
+ args...);
}
-template <typename OutputIt, typename Char, typename... Args>
-inline typename std::enable_if<
- internal::is_output_iterator<OutputIt>::value,
- format_to_n_result<OutputIt>>::type vformat_to_n(
+template <typename OutputIt, typename Char, typename... Args,
+ FMT_ENABLE_IF(internal::is_output_iterator<OutputIt>::value)>
+inline format_to_n_result<OutputIt> vformat_to_n(
OutputIt out, std::size_t n, basic_string_view<Char> format_str,
- typename format_to_n_args<OutputIt, Char>::type args) {
- typedef internal::truncating_iterator<OutputIt> It;
- auto it = vformat_to(It(out, n), format_str, args);
+ format_to_n_args<OutputIt, Char> args) {
+ auto it = vformat_to(internal::truncating_iterator<OutputIt>(out, n),
+ format_str, args);
return {it.base(), it.count()};
}
end of the output range.
\endrst
*/
-template <typename OutputIt, typename S, typename... Args>
-inline FMT_ENABLE_IF_T(
- internal::is_string<S>::value &&
- internal::is_output_iterator<OutputIt>::value,
- format_to_n_result<OutputIt>)
- format_to_n(OutputIt out, std::size_t n, const S &format_str,
- const Args &... args) {
+template <typename OutputIt, typename S, typename... Args,
+ FMT_ENABLE_IF(internal::is_string<S>::value&&
+ internal::is_output_iterator<OutputIt>::value)>
+inline format_to_n_result<OutputIt> format_to_n(OutputIt out, std::size_t n,
+ const S& format_str,
+ const Args&... args) {
internal::check_format_string<Args...>(format_str);
- typedef FMT_CHAR(S) Char;
- format_arg_store<
- typename format_to_n_context<OutputIt, Char>::type, Args...> as(args...);
+ using context = format_to_n_context<OutputIt, char_t<S>>;
return vformat_to_n(out, n, to_string_view(format_str),
- typename format_to_n_args<OutputIt, Char>::type(as));
+ {make_format_args<context>(args...)});
}
template <typename Char>
inline std::basic_string<Char> internal::vformat(
basic_string_view<Char> format_str,
- basic_format_args<typename buffer_context<Char>::type> args) {
+ basic_format_args<buffer_context<Char>> args) {
basic_memory_buffer<Char> buffer;
internal::vformat_to(buffer, format_str, args);
return fmt::to_string(buffer);
``format(format_str, args...)``.
*/
template <typename... Args>
-inline std::size_t formatted_size(string_view format_str,
- const Args &... args) {
+inline std::size_t formatted_size(string_view format_str, const Args&... args) {
auto it = format_to(internal::counting_iterator<char>(), format_str, args...);
return it.count();
}
#if FMT_USE_USER_DEFINED_LITERALS
namespace internal {
-# if FMT_UDL_TEMPLATE
-template <typename Char, Char... CHARS>
-class udl_formatter {
+# if FMT_USE_UDL_TEMPLATE
+template <typename Char, Char... CHARS> class udl_formatter {
public:
template <typename... Args>
- std::basic_string<Char> operator()(const Args &... args) const {
+ std::basic_string<Char> operator()(Args&&... args) const {
FMT_CONSTEXPR_DECL Char s[] = {CHARS..., '\0'};
FMT_CONSTEXPR_DECL bool invalid_format =
do_check_format_string<Char, error_handler, Args...>(
- basic_string_view<Char>(s, sizeof...(CHARS)));
+ basic_string_view<Char>(s, sizeof...(CHARS)));
(void)invalid_format;
- return format(s, args...);
+ return format(s, std::forward<Args>(args)...);
}
};
-# else
-template <typename Char>
-struct udl_formatter {
- const Char *str;
+# else
+template <typename Char> struct udl_formatter {
+ basic_string_view<Char> str;
template <typename... Args>
- auto operator()(Args &&... args) const
- -> decltype(format(str, std::forward<Args>(args)...)) {
+ std::basic_string<Char> operator()(Args&&... args) const {
return format(str, std::forward<Args>(args)...);
}
};
-# endif // FMT_UDL_TEMPLATE
+# endif // FMT_USE_UDL_TEMPLATE
-template <typename Char>
-struct udl_arg {
- const Char *str;
+template <typename Char> struct udl_arg {
+ basic_string_view<Char> str;
- template <typename T>
- named_arg<T, Char> operator=(T &&value) const {
+ template <typename T> named_arg<T, Char> operator=(T&& value) const {
return {str, std::forward<T>(value)};
}
};
-} // namespace internal
+} // namespace internal
inline namespace literals {
-
-# if FMT_UDL_TEMPLATE
+# if FMT_USE_UDL_TEMPLATE
+# pragma GCC diagnostic push
+# if FMT_CLANG_VERSION
+# pragma GCC diagnostic ignored "-Wgnu-string-literal-operator-template"
+# endif
template <typename Char, Char... CHARS>
FMT_CONSTEXPR internal::udl_formatter<Char, CHARS...> operator""_format() {
return {};
}
-# else
+# pragma GCC diagnostic pop
+# else
/**
\rst
User-defined literal equivalent of :func:`fmt::format`.
std::string message = "The answer is {}"_format(42);
\endrst
*/
-inline internal::udl_formatter<char>
-operator"" _format(const char *s, std::size_t) { return {s}; }
-inline internal::udl_formatter<wchar_t>
-operator"" _format(const wchar_t *s, std::size_t) { return {s}; }
-# endif // FMT_UDL_TEMPLATE
+FMT_CONSTEXPR internal::udl_formatter<char> operator"" _format(const char* s,
+ std::size_t n) {
+ return {{s, n}};
+}
+FMT_CONSTEXPR internal::udl_formatter<wchar_t> operator"" _format(
+ const wchar_t* s, std::size_t n) {
+ return {{s, n}};
+}
+# endif // FMT_USE_UDL_TEMPLATE
/**
\rst
fmt::print("Elapsed time: {s:.2f} seconds", "s"_a=1.23);
\endrst
*/
-inline internal::udl_arg<char>
-operator"" _a(const char *s, std::size_t) { return {s}; }
-inline internal::udl_arg<wchar_t>
-operator"" _a(const wchar_t *s, std::size_t) { return {s}; }
-} // inline namespace literals
-#endif // FMT_USE_USER_DEFINED_LITERALS
+FMT_CONSTEXPR internal::udl_arg<char> operator"" _a(const char* s,
+ std::size_t n) {
+ return {{s, n}};
+}
+FMT_CONSTEXPR internal::udl_arg<wchar_t> operator"" _a(const wchar_t* s,
+ std::size_t n) {
+ return {{s, n}};
+}
+} // namespace literals
+#endif // FMT_USE_USER_DEFINED_LITERALS
FMT_END_NAMESPACE
-#define FMT_STRING(s) [] { \
- typedef typename std::remove_cv<std::remove_pointer< \
- typename std::decay<decltype(s)>::type>::type>::type ct; \
- struct str : fmt::compile_string { \
- typedef ct char_type; \
- FMT_CONSTEXPR operator fmt::basic_string_view<ct>() const { \
- return {s, sizeof(s) / sizeof(ct) - 1}; \
- } \
- }; \
- return str{}; \
+/**
+ \rst
+ Constructs a compile-time format string.
+
+ **Example**::
+
+ // A compile-time error because 'd' is an invalid specifier for strings.
+ std::string s = format(FMT_STRING("{:d}"), "foo");
+ \endrst
+ */
+#define FMT_STRING(s) \
+ [] { \
+ struct str : fmt::compile_string { \
+ using char_type = typename std::remove_cv<std::remove_pointer< \
+ typename std::decay<decltype(s)>::type>::type>::type; \
+ FMT_CONSTEXPR operator fmt::basic_string_view<char_type>() const { \
+ return {s, sizeof(s) / sizeof(char_type) - 1}; \
+ } \
+ } result; \
+ /* Suppress Qt Creator warning about unused operator. */ \
+ (void)static_cast<fmt::basic_string_view<typename str::char_type>>( \
+ result); \
+ return result; \
}()
#if defined(FMT_STRING_ALIAS) && FMT_STRING_ALIAS
std::string s = format(fmt("{:d}"), "foo");
\endrst
*/
-# define fmt(s) FMT_STRING(s)
+# define fmt(s) FMT_STRING(s)
#endif
#ifdef FMT_HEADER_ONLY
-# define FMT_FUNC inline
-# include "format-inl.h"
+# define FMT_FUNC inline
+# include "format-inl.h"
#else
-# define FMT_FUNC
-#endif
-
-// Restore warnings.
-#if FMT_GCC_VERSION >= 406 || FMT_CLANG_VERSION
-# pragma GCC diagnostic pop
+# define FMT_FUNC
#endif
#endif // FMT_FORMAT_H_
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