--- /dev/null
+// Formatting library for C++ - the core API
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_CORE_H_
+#define FMT_CORE_H_
+
+#include <cassert>
+#include <cstdio> // std::FILE
+#include <cstring>
+#include <iterator>
+#include <string>
+#include <type_traits>
+
+// The fmt library version in the form major * 10000 + minor * 100 + patch.
+#define FMT_VERSION 50300
+
+#ifdef __has_feature
+# define FMT_HAS_FEATURE(x) __has_feature(x)
+#else
+# 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)
+#else
+# define FMT_HAS_INCLUDE(x) 0
+#endif
+
+#ifdef __has_cpp_attribute
+# define FMT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
+#else
+# define FMT_HAS_CPP_ATTRIBUTE(x) 0
+#endif
+
+#if defined(__GNUC__) && !defined(__clang__)
+# define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
+#else
+# define FMT_GCC_VERSION 0
+#endif
+
+#if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__)
+# define FMT_HAS_GXX_CXX11 FMT_GCC_VERSION
+#else
+# define FMT_HAS_GXX_CXX11 0
+#endif
+
+#ifdef _MSC_VER
+# define FMT_MSC_VER _MSC_VER
+#else
+# 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))
+#endif
+#if FMT_USE_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
+#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
+#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
+#endif
+
+// Define FMT_USE_NOEXCEPT to make fmt use noexcept (C++11 feature).
+#ifndef FMT_USE_NOEXCEPT
+# 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
+#else
+# 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
+#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 {
+#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
+#endif
+#ifndef FMT_API
+# define FMT_API
+#endif
+
+#ifndef FMT_ASSERT
+# 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))) || \
+ (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>
+#endif
+
+FMT_BEGIN_NAMESPACE
+namespace internal {
+
+// An implementation of declval for pre-C++11 compilers such as gcc 4.
+template <typename T>
+typename std::add_rvalue_reference<T>::type declval() FMT_NOEXCEPT;
+
+template <typename>
+struct result_of;
+
+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;
+};
+
+// Casts nonnegative integer to unsigned.
+template <typename Int>
+FMT_CONSTEXPR typename std::make_unsigned<Int>::type to_unsigned(Int value) {
+ 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
+
+/**
+ An implementation of ``std::basic_string_view`` for pre-C++17. It provides a
+ subset of the API. ``fmt::basic_string_view`` is used for format strings even
+ if ``std::string_view`` is available to prevent issues when a library is
+ compiled with a different ``-std`` option than the client code (which is not
+ recommended).
+ */
+template <typename Char>
+class basic_string_view {
+ private:
+ const Char *data_;
+ size_t size_;
+
+ public:
+ typedef Char char_type;
+ typedef const Char *iterator;
+
+ FMT_CONSTEXPR basic_string_view() FMT_NOEXCEPT : data_(FMT_NULL), 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) {}
+
+ /**
+ \rst
+ Constructs a string reference object from a C string computing
+ the size with ``std::char_traits<Char>::length``.
+ \endrst
+ */
+ 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()) {}
+
+#ifdef FMT_STRING_VIEW
+ FMT_CONSTEXPR basic_string_view(FMT_STRING_VIEW<Char> s) FMT_NOEXCEPT
+ : data_(s.data()), size_(s.size()) {}
+#endif
+
+ /** Returns a pointer to the string data. */
+ FMT_CONSTEXPR const Char *data() const { return data_; }
+
+ /** Returns the string size. */
+ FMT_CONSTEXPR size_t size() const { return size_; }
+
+ FMT_CONSTEXPR iterator begin() const { return data_; }
+ FMT_CONSTEXPR iterator end() const { return data_ + size_; }
+
+ FMT_CONSTEXPR void remove_prefix(size_t n) {
+ data_ += n;
+ size_ -= n;
+ }
+
+ // Lexicographically compare this string reference to other.
+ int compare(basic_string_view other) const {
+ size_t str_size = size_ < other.size_ ? size_ : other.size_;
+ int result = std::char_traits<Char>::compare(data_, other.data_, str_size);
+ if (result == 0)
+ result = size_ == other.size_ ? 0 : (size_ < other.size_ ? -1 : 1);
+ return result;
+ }
+
+ friend bool operator==(basic_string_view lhs, basic_string_view rhs) {
+ return lhs.compare(rhs) == 0;
+ }
+ friend bool operator!=(basic_string_view lhs, basic_string_view rhs) {
+ return lhs.compare(rhs) != 0;
+ }
+ friend bool operator<(basic_string_view lhs, basic_string_view rhs) {
+ return lhs.compare(rhs) < 0;
+ }
+ friend bool operator<=(basic_string_view lhs, basic_string_view rhs) {
+ return lhs.compare(rhs) <= 0;
+ }
+ friend bool operator>(basic_string_view lhs, basic_string_view rhs) {
+ return lhs.compare(rhs) > 0;
+ }
+ friend bool operator>=(basic_string_view lhs, basic_string_view rhs) {
+ return lhs.compare(rhs) >= 0;
+ }
+};
+
+typedef basic_string_view<char> string_view;
+typedef basic_string_view<wchar_t> wstring_view;
+
+/**
+ \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.
+
+ **Example**::
+
+ namespace my_ns {
+ 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>
+inline basic_string_view<Char>
+ to_string_view(const std::basic_string<Char> &s) { return s; }
+
+template <typename Char>
+inline basic_string_view<Char> to_string_view(const 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
+
+// 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).
+struct compile_string {};
+
+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 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());
+};
+
+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> {};
+
+namespace internal {
+
+struct dummy_string_view { typedef void char_type; };
+dummy_string_view to_string_view(...);
+using fmt::v5::to_string_view;
+
+// 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> {};
+
+template <typename S>
+struct char_t {
+ typedef decltype(to_string_view(declval<S>())) result;
+ typedef typename result::char_type type;
+};
+
+template <typename Char>
+struct named_arg_base;
+
+template <typename T, typename Char>
+struct named_arg;
+
+enum 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,
+ 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
+};
+
+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_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;
+}
+
+template <typename Char>
+struct string_value {
+ const Char *value;
+ std::size_t size;
+};
+
+template <typename Context>
+struct custom_value {
+ const void *value;
+ void (*format)(const void *arg, Context &ctx);
+};
+
+// A formatting argument value.
+template <typename Context>
+class value {
+ public:
+ typedef typename Context::char_type char_type;
+
+ union {
+ int int_value;
+ unsigned uint_value;
+ long long long_long_value;
+ unsigned long long ulong_long_value;
+ double double_value;
+ long double long_double_value;
+ const void *pointer;
+ string_value<char_type> string;
+ string_value<signed char> sstring;
+ string_value<unsigned char> ustring;
+ custom_value<Context> custom;
+ };
+
+ 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;
+ }
+ value(basic_string_view<char_type> val) {
+ string.value = val.data();
+ string.size = val.size();
+ }
+ value(const void *val) { pointer = val; }
+
+ template <typename T>
+ explicit value(const T &val) {
+ custom.value = &val;
+ custom.format = &format_custom_arg<T>;
+ }
+
+ const named_arg_base<char_type> &as_named_arg() {
+ return *static_cast<const named_arg_base<char_type>*>(pointer);
+ }
+
+ 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();
+ 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);
+
+#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); \
+ }
+
+#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)
+
+// 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
+
+// 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 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 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);
+}
+
+// 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;
+} // 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 {
+ 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);
+
+ 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 class basic_format_args<Context>;
+ friend class internal::arg_map<Context>;
+
+ typedef typename Context::char_type char_type;
+
+ public:
+ class handle {
+ public:
+ explicit handle(internal::custom_value<Context> custom): custom_(custom) {}
+
+ void format(Context &ctx) const { custom_.format(custom_.value, ctx); }
+
+ private:
+ internal::custom_value<Context> custom_;
+ };
+
+ FMT_CONSTEXPR basic_format_arg() : type_(internal::none_type) {}
+
+ FMT_EXPLICIT operator bool() const FMT_NOEXCEPT {
+ return type_ != internal::none_type;
+ }
+
+ internal::type type() const { return type_; }
+
+ bool is_integral() const { return internal::is_integral(type_); }
+ bool is_arithmetic() const { return internal::is_arithmetic(type_); }
+};
+
+struct monostate {};
+
+/**
+ \rst
+ Visits an argument dispatching to the appropriate visit method based on
+ the argument type. For example, if the argument type is ``double`` then
+ ``vis(value)`` will be called with the value of type ``double``.
+ \endrst
+ */
+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;
+ switch (arg.type_) {
+ case internal::none_type:
+ break;
+ case internal::named_arg_type:
+ FMT_ASSERT(false, "invalid argument type");
+ break;
+ case internal::int_type:
+ return vis(arg.value_.int_value);
+ case internal::uint_type:
+ return vis(arg.value_.uint_value);
+ case internal::long_long_type:
+ return vis(arg.value_.long_long_value);
+ case internal::ulong_long_type:
+ return vis(arg.value_.ulong_long_value);
+ case internal::bool_type:
+ return vis(arg.value_.int_value != 0);
+ case internal::char_type:
+ return vis(static_cast<char_type>(arg.value_.int_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);
+ case internal::string_type:
+ return vis(basic_string_view<char_type>(
+ arg.value_.string.value, arg.value_.string.size));
+ case internal::pointer_type:
+ return vis(arg.value_.pointer);
+ case internal::custom_type:
+ return vis(typename basic_format_arg<Context>::handle(arg.value_.custom));
+ }
+ 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 {
+ private:
+ arg_map(const arg_map &) = delete;
+ void operator=(const arg_map &) = delete;
+
+ typedef typename Context::char_type char_type;
+
+ struct entry {
+ basic_string_view<char_type> name;
+ basic_format_arg<Context> arg;
+ };
+
+ 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>()};
+ ++size_;
+ }
+
+ public:
+ arg_map() : map_(FMT_NULL), 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;
+ }
+ 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();
+ }
+
+ 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_; }
+};
+
+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 Context>
+FMT_CONSTEXPR11 unsigned long long get_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);
+}
+
+template <typename Context, typename T>
+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);
+ 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>
+inline typename std::enable_if<!IS_PACKED, basic_format_arg<Context>>::type
+ 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> {
+ 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; };
+
+ private:
+ internal::arg_map<basic_format_context> map_;
+
+ 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;
+
+ public:
+ using typename base::iterator;
+
+ /**
+ 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_args<basic_format_context> ctx_args,
+ internal::locale_ref loc = internal::locale_ref())
+ : base(out, format_str, ctx_args, 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); }
+
+ // Checks if manual indexing is used and returns the argument with the
+ // specified name.
+ format_arg get_arg(basic_string_view<char_type> name);
+};
+
+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;
+
+/**
+ \rst
+ An array of references to arguments. It can be implicitly converted into
+ `~fmt::basic_format_args` for passing into type-erased formatting functions
+ such as `~fmt::vformat`.
+ \endrst
+ */
+template <typename Context, typename ...Args>
+class format_arg_store {
+ private:
+ static const size_t NUM_ARGS = sizeof...(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;
+
+ // 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];
+
+ 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
+
+#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
+};
+
+#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`.
+ \endrst
+ */
+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 {
+ public:
+ typedef unsigned size_type;
+ typedef basic_format_arg<Context> format_arg;
+
+ private:
+ // To reduce compiled code size per formatting function call, types of first
+ // max_packed_args arguments are passed in the types_ field.
+ unsigned long long types_;
+ union {
+ // If the number of arguments is less than max_packed_args, the argument
+ // values are stored in values_, otherwise they are stored in args_.
+ // 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_;
+ };
+
+ 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);
+ }
+
+ 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; }
+
+ format_arg do_get(size_type index) const {
+ format_arg arg;
+ if (!is_packed()) {
+ auto num_args = max_size();
+ if (index < num_args)
+ arg = args_[index];
+ 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_;
+ val = values_[index];
+ return arg;
+ }
+
+ public:
+ basic_format_args() : types_(0) {}
+
+ /**
+ \rst
+ Constructs a `basic_format_args` object from `~fmt::format_arg_store`.
+ \endrst
+ */
+ template <typename... Args>
+ basic_format_args(const format_arg_store<Context, Args...> &store)
+ : types_(static_cast<unsigned long long>(store.TYPES)) {
+ set_data(store.data_);
+ }
+
+ /**
+ \rst
+ 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) {
+ set_data(args);
+ }
+
+ /** Returns the argument at specified index. */
+ format_arg get(size_type index) const {
+ format_arg arg = do_get(index);
+ if (arg.type_ == internal::named_arg_type)
+ arg = arg.value_.as_named_arg().template deserialize<Context>();
+ return arg;
+ }
+
+ size_type 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);
+ }
+};
+
+/** An alias to ``basic_format_args<context>``. */
+// It is a separate type rather than a typedef 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)...) {}
+};
+struct wformat_args : basic_format_args<wformat_context> {
+ template <typename ...Args>
+ wformat_args(Args &&... arg)
+ : basic_format_args<wformat_context>(std::forward<Args>(arg)...) {}
+};
+
+#define FMT_ENABLE_IF_T(B, T) typename std::enable_if<B, T>::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
+
+namespace internal {
+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>)];
+
+ named_arg_base(basic_string_view<Char> nm) : name(nm) {}
+
+ 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;
+
+ 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 Char>
+std::basic_string<Char> vformat(
+ basic_string_view<Char> format_str,
+ basic_format_args<typename buffer_context<Char>::type> 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);
+}
+
+/**
+ \rst
+ Returns a named argument to be used in a formatting function.
+
+ **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) {
+ return {name, arg};
+}
+
+// Disable nested named arguments, e.g. ``arg("a", arg("b", 42))``.
+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));
+ 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 S, typename Char = FMT_CHAR(S)>
+inline std::basic_string<Char> vformat(
+ const S &format_str,
+ basic_format_args<typename buffer_context<Char>::type> args) {
+ return internal::vformat(to_string_view(format_str), args);
+}
+
+/**
+ \rst
+ Formats arguments and returns the result as a string.
+
+ **Example**::
+
+ #include <fmt/core.h>
+ 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) {
+ return internal::vformat(
+ to_string_view(format_str),
+ *internal::checked_args<S, 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);
+
+/**
+ \rst
+ Prints formatted data to the file *f*. For wide format strings,
+ *f* should be in wide-oriented mode set via ``fwide(f, 1)`` or
+ ``_setmode(_fileno(f), _O_U8TEXT)`` on Windows.
+
+ **Example**::
+
+ 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) {
+ vprint(f, to_string_view(format_str),
+ internal::checked_args<S, Args...>(format_str, args...));
+}
+
+FMT_API void vprint(string_view format_str, format_args args);
+FMT_API void vprint(wstring_view format_str, wformat_args args);
+
+/**
+ \rst
+ Prints formatted data to ``stdout``.
+
+ **Example**::
+
+ 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) {
+ vprint(to_string_view(format_str),
+ internal::checked_args<S, Args...>(format_str, args...));
+}
+FMT_END_NAMESPACE
+
+#endif // FMT_CORE_H_
--- /dev/null
+// Formatting library for C++
+//
+// Copyright (c) 2012 - 2016, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_FORMAT_INL_H_
+#define FMT_FORMAT_INL_H_
+
+#include "format.h"
+
+#include <string.h>
+
+#include <cctype>
+#include <cerrno>
+#include <climits>
+#include <cmath>
+#include <cstdarg>
+#include <cstddef> // for std::ptrdiff_t
+#include <cstring> // for std::memmove
+#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)
+# 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
+#endif
+
+#if FMT_EXCEPTIONS
+# define FMT_TRY try
+# define FMT_CATCH(x) catch (x)
+#else
+# define FMT_TRY if (true)
+# define FMT_CATCH(x) if (false)
+#endif
+
+#ifdef _MSC_VER
+# 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)
+#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 *, ...) {
+ return fmt::internal::null<>();
+}
+inline fmt::internal::null<> strerror_s(char *, std::size_t, ...) {
+ return fmt::internal::null<>();
+}
+
+FMT_BEGIN_NAMESPACE
+
+namespace {
+
+#ifndef _MSC_VER
+# define FMT_SNPRINTF snprintf
+#else // _MSC_VER
+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
+#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);
+
+// Portable thread-safe version of strerror.
+// Sets buffer to point to a string describing the error code.
+// This can be either a pointer to a string stored in buffer,
+// or a pointer to some static immutable string.
+// Returns one of the following values:
+// 0 - success
+// 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");
+
+ class dispatcher {
+ private:
+ int error_code_;
+ char *&buffer_;
+ std::size_t buffer_size_;
+
+ // A noop assignment operator to avoid bogus warnings.
+ void operator=(const dispatcher &) {}
+
+ // Handle the result of XSI-compliant version of strerror_r.
+ int handle(int result) {
+ // glibc versions before 2.13 return result in errno.
+ return result == -1 ? errno : result;
+ }
+
+ // Handle the result of GNU-specific version of strerror_r.
+ 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;
+ buffer_ = message;
+ return 0;
+ }
+
+ // Handle the case when strerror_r is not available.
+ int handle(internal::null<>) {
+ return fallback(strerror_s(buffer_, buffer_size_, error_code_));
+ }
+
+ // 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;
+ }
+
+#if !FMT_MSC_VER
+ // Fallback to strerror if strerror_r and strerror_s are not available.
+ int fallback(internal::null<>) {
+ errno = 0;
+ buffer_ = strerror(error_code_);
+ return errno;
+ }
+#endif
+
+ public:
+ 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_));
+ }
+ };
+ return dispatcher(error_code, buffer, buffer_size).run();
+}
+
+void format_error_code(internal::buffer &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.
+ out.resize(0);
+ static const char SEP[] = ": ";
+ 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);
+ 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);
+ if (message.size() <= inline_buffer_size - error_code_size) {
+ w.write(message);
+ w.write(SEP);
+ }
+ w.write(ERROR_STR);
+ w.write(error_code);
+ assert(out.size() <= inline_buffer_size);
+}
+
+void report_error(FormatFunc 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);
+ 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;
+}
+
+#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)
+namespace internal {
+
+template <typename Locale>
+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 {
+ 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();
+}
+}
+#else
+template <typename Char>
+FMT_FUNC Char internal::thousands_sep_impl(locale_ref) {
+ return FMT_STATIC_THOUSANDS_SEPARATOR;
+}
+#endif
+
+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;
+ 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 <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);
+}
+
+template <typename T>
+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 uint32_t basic_data<T>::POWERS_OF_10_32[] = {
+ 1, FMT_POWERS_OF_10(1)
+};
+
+template <typename T>
+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
+};
+
+// 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,
+};
+
+// 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
+};
+
+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";
+
+// A handmade floating-point number f * pow(2, e).
+class fp {
+ private:
+ typedef uint64_t significand_type;
+
+ // 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;
+ static FMT_CONSTEXPR_DECL const uint64_t implicit_bit =
+ 1ull << double_significand_size;
+
+ public:
+ significand_type f;
+ int e;
+
+ static FMT_CONSTEXPR_DECL const int significand_size =
+ sizeof(significand_type) * char_size;
+
+ 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) {
+ // 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);
+ const int exponent_size =
+ double_size - 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;
+ auto u = bit_cast<uint64_t>(d);
+ auto biased_e = (u & exponent_mask) >> double_significand_size;
+ f = u & significand_mask;
+ if (biased_e != 0)
+ f += implicit_bit;
+ else
+ biased_e = 1; // Subnormals use biased exponent 1 (min exponent).
+ e = static_cast<int>(biased_e - exponent_bias - double_significand_size);
+ }
+
+ // Normalizes the value converted from double and multiplied by (1 << SHIFT).
+ template <int SHIFT = 0>
+ void normalize() {
+ // Handle subnormals.
+ auto shifted_implicit_bit = implicit_bit << SHIFT;
+ while ((f & shifted_implicit_bit) == 0) {
+ f <<= 1;
+ --e;
+ }
+ // Subtract 1 to account for hidden bit.
+ auto offset = significand_size - double_significand_size - SHIFT - 1;
+ f <<= offset;
+ e -= offset;
+ }
+
+ // Compute lower and upper boundaries (m^- and m^+ in the Grisu paper), where
+ // 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);
+ 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;
+ lower.e = upper.e;
+ }
+};
+
+// Returns an fp number representing x - y. Result may not be normalized.
+inline fp operator-(fp x, fp y) {
+ FMT_ASSERT(x.f >= y.f && x.e == y.e, "invalid operands");
+ return fp(x.f - y.f, x.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);
+
+FMT_FUNC fp operator*(fp x, fp y) {
+ // Multiply 32-bit parts of significands.
+ uint64_t mask = (1ULL << 32) - 1;
+ uint64_t a = x.f >> 32, b = x.f & mask;
+ uint64_t c = y.f >> 32, d = y.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);
+}
+
+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));
+ // 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]);
+}
+
+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;
+}
+
+// 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) {
+ 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;
+ 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).
+ 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;
+ --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);
+ }
+ }
+}
+
+#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;
+ 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;
+ }
+
+ 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;
+ }
+};
+
+// 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]);
+ }
+}
+
+struct fill {
+ size_t n;
+ void operator()(char *buf) const {
+ buf[0] = '0';
+ buf[1] = '.';
+ std::uninitialized_fill_n(buf + 2, n, '0');
+ }
+};
+
+// 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');
+ }
+ } 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;
+ }
+ 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;
+ }
+ 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) {
+ 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));
+ 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;
+ }
+ grisu2_prettify(params, size, cached_exp + exp, prettify_handler(buf, size));
+ return true;
+}
+
+template <typename Double>
+void sprintf_format(Double value, internal::buffer &buf,
+ core_format_specs spec) {
+ // 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;
+ *format_ptr++ = '%';
+ if (spec.has(HASH_FLAG))
+ *format_ptr++ = '#';
+ if (spec.precision >= 0) {
+ *format_ptr++ = '.';
+ *format_ptr++ = '*';
+ }
+ if (std::is_same<Double, long double>::value)
+ *format_ptr++ = 'L';
+ *format_ptr++ = spec.type;
+ *format_ptr = '\0';
+
+ // Format using snprintf.
+ char *start = FMT_NULL;
+ 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);
+ if (result >= 0) {
+ unsigned n = internal::to_unsigned(result);
+ if (n < buf.capacity()) {
+ buf.resize(n);
+ break; // The buffer is large enough - continue with formatting.
+ }
+ buf.reserve(n + 1);
+ } else {
+ // If result is negative we ask to increase the capacity by at least 1,
+ // but as std::vector, the buffer grows exponentially.
+ buf.reserve(buf.capacity() + 1);
+ }
+ }
+}
+} // namespace internal
+
+#if FMT_USE_WINDOWS_H
+
+FMT_FUNC internal::utf8_to_utf16::utf8_to_utf16(string_view s) {
+ static const char ERROR_MSG[] = "cannot convert string from UTF-8 to UTF-16";
+ if (s.size() > INT_MAX)
+ FMT_THROW(windows_error(ERROR_INVALID_PARAMETER, ERROR_MSG));
+ int s_size = static_cast<int>(s.size());
+ if (s_size == 0) {
+ // MultiByteToWideChar does not support zero length, handle separately.
+ buffer_.resize(1);
+ buffer_[0] = 0;
+ 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));
+ 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));
+ 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"));
+ }
+}
+
+FMT_FUNC int internal::utf16_to_utf8::convert(wstring_view s) {
+ 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.
+ buffer_.resize(1);
+ buffer_[0] = 0;
+ return 0;
+ }
+
+ int length = WideCharToMultiByte(
+ CP_UTF8, 0, s.data(), s_size, FMT_NULL, 0, FMT_NULL, FMT_NULL);
+ 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();
+ buffer_[length] = 0;
+ return 0;
+}
+
+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;
+ 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_TRY {
+ wmemory_buffer buf;
+ buf.resize(inline_buffer_size);
+ for (;;) {
+ 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);
+ if (result != 0) {
+ utf16_to_utf8 utf8_message;
+ if (utf8_message.convert(system_message) == ERROR_SUCCESS) {
+ writer w(out);
+ w.write(message);
+ w.write(": ");
+ w.write(utf8_message);
+ return;
+ }
+ break;
+ }
+ if (GetLastError() != ERROR_INSUFFICIENT_BUFFER)
+ break; // Can't get error message, report error code instead.
+ buf.resize(buf.size() * 2);
+ }
+ } 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_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());
+ if (result == 0) {
+ writer w(out);
+ w.write(message);
+ w.write(": ");
+ w.write(system_message);
+ return;
+ }
+ if (result != ERANGE)
+ break; // Can't get error message, report error code instead.
+ buf.resize(buf.size() * 2);
+ }
+ } FMT_CATCH(...) {}
+ format_error_code(out, error_code, 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 {
+ 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 {
+ report_error(internal::format_windows_error, error_code, message);
+}
+#endif
+
+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);
+}
+
+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);
+}
+
+FMT_FUNC void vprint(string_view format_str, format_args args) {
+ vprint(stdout, format_str, args);
+}
+
+FMT_FUNC void vprint(wstring_view format_str, wformat_args args) {
+ vprint(stdout, format_str, args);
+}
+
+FMT_END_NAMESPACE
+
+#ifdef _MSC_VER
+# pragma warning(pop)
+#endif
+
+#endif // FMT_FORMAT_INL_H_
--- /dev/null
+/*
+ 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.
+ */
+
+#ifndef FMT_FORMAT_H_
+#define FMT_FORMAT_H_
+
+#include <algorithm>
+#include <cassert>
+#include <cmath>
+#include <cstring>
+#include <limits>
+#include <memory>
+#include <stdexcept>
+#include <stdint.h>
+
+#ifdef __clang__
+# define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__)
+#else
+# define FMT_CLANG_VERSION 0
+#endif
+
+#ifdef __INTEL_COMPILER
+# define FMT_ICC_VERSION __INTEL_COMPILER
+#elif defined(__ICL)
+# define FMT_ICC_VERSION __ICL
+#else
+# 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
+#else
+# define FMT_SECURE_SCL 0
+#endif
+
+#if FMT_SECURE_SCL
+# include <iterator>
+#endif
+
+#ifdef __has_builtin
+# 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__)
+#endif
+
+#ifndef FMT_THROW
+# if FMT_EXCEPTIONS
+# if FMT_MSC_VER
+FMT_BEGIN_NAMESPACE
+namespace internal {
+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;
+}
+}
+FMT_END_NAMESPACE
+# define FMT_THROW(x) fmt::internal::do_throw(x)
+# else
+# define FMT_THROW(x) throw x
+# 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
+#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
+#endif
+
+#if FMT_HAS_GXX_CXX11 || FMT_HAS_FEATURE(cxx_trailing_return) || \
+ FMT_MSC_VER >= 1600
+# define FMT_USE_TRAILING_RETURN 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
+#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)
+# define FMT_BUILTIN_CLZ(n) __builtin_clz(n)
+# endif
+
+# if FMT_GCC_VERSION >= 400 || FMT_HAS_BUILTIN(__builtin_clzll)
+# 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
+
+FMT_BEGIN_NAMESPACE
+namespace internal {
+// Avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning.
+# ifndef __clang__
+# pragma intrinsic(_BitScanReverse)
+# endif
+inline uint32_t clz(uint32_t x) {
+ unsigned long r = 0;
+ _BitScanReverse(&r, x);
+
+ 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)
+ return 31 - r;
+}
+# define FMT_BUILTIN_CLZ(n) fmt::internal::clz(n)
+
+# if defined(_WIN64) && !defined(__clang__)
+# pragma intrinsic(_BitScanReverse64)
+# endif
+
+inline uint32_t clzll(uint64_t x) {
+ unsigned long r = 0;
+# ifdef _WIN64
+ _BitScanReverse64(&r, x);
+# else
+ // Scan the high 32 bits.
+ 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
+
+ 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)
+ return 63 - r;
+}
+# define FMT_BUILTIN_CLZLL(n) fmt::internal::clzll(n)
+}
+FMT_END_NAMESPACE
+#endif
+
+FMT_BEGIN_NAMESPACE
+namespace internal {
+
+// 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);
+template <typename Dest, typename Source>
+inline Dest bit_cast(const Source& source) {
+ static_assert(sizeof(Dest) == sizeof(Source), "size mismatch");
+ Dest dest;
+ std::memcpy(&dest, &source, sizeof(dest));
+ 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; }
+
+// For std::result_of in gcc 4.4.
+template <typename Result>
+struct function {
+ template <typename T>
+ struct result { typedef Result type; };
+};
+
+struct dummy_int {
+ int data[2];
+ operator int() const { return 0; }
+};
+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);
+#else
+ return alloc.allocate(n);
+#endif
+}
+
+// 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
+
+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;
+ }
+};
+} // namespace std
+
+FMT_BEGIN_NAMESPACE
+template <typename Range>
+class basic_writer;
+
+template <typename OutputIt, typename T = typename OutputIt::value_type>
+class output_range {
+ private:
+ OutputIt it_;
+
+ // Unused yet.
+ typedef void sentinel;
+ sentinel end() const;
+
+ public:
+ typedef OutputIt iterator;
+ typedef T value_type;
+
+ explicit output_range(OutputIt it): it_(it) {}
+ OutputIt begin() const { return it_; }
+};
+
+// 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;
+ public:
+ typedef typename Container::value_type value_type;
+
+ back_insert_range(Container &c): base(std::back_inserter(c)) {}
+ back_insert_range(typename base::iterator it): base(it) {}
+};
+
+typedef basic_writer<back_insert_range<internal::buffer>> writer;
+typedef basic_writer<back_insert_range<internal::wbuffer>> wwriter;
+
+/** 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) {}
+
+ explicit format_error(const std::string &message)
+ : std::runtime_error(message) {}
+};
+
+namespace internal {
+
+#if FMT_SECURE_SCL
+template <typename T>
+struct checked { typedef stdext::checked_array_iterator<T*> type; };
+
+// 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};
+}
+#else
+template <typename T>
+struct checked { typedef T *type; };
+template <typename T>
+inline T *make_checked(T *p, std::size_t) { return p; }
+#endif
+
+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);
+ reserve(new_size);
+ std::uninitialized_copy(begin, end,
+ internal::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) {}
+};
+
+#if FMT_USE_USER_DEFINED_LITERALS
+inline namespace literals {
+inline u8string_view operator"" _u(const char *s, std::size_t n) {
+ return {s, n};
+}
+}
+#endif
+
+// The number of characters to store in the basic_memory_buffer object itself
+// to avoid dynamic memory allocation.
+enum { inline_buffer_size = 500 };
+
+/**
+ \rst
+ A dynamically growing memory buffer for trivially copyable/constructible types
+ with the first ``SIZE`` elements stored in the object itself.
+
+ You can use one of the following typedefs for common character types:
+
+ +----------------+------------------------------+
+ | Type | Definition |
+ +================+==============================+
+ | memory_buffer | basic_memory_buffer<char> |
+ +----------------+------------------------------+
+ | wmemory_buffer | basic_memory_buffer<wchar_t> |
+ +----------------+------------------------------+
+
+ **Example**::
+
+ fmt::memory_buffer out;
+ format_to(out, "The answer is {}.", 42);
+
+ This will append the following output to the ``out`` object:
+
+ .. code-block:: none
+
+ The answer is 42.
+
+ The output can be converted to an ``std::string`` with ``to_string(out)``.
+ \endrst
+ */
+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> {
+ private:
+ T store_[SIZE];
+
+ // Deallocate memory allocated by the buffer.
+ void deallocate() {
+ T* data = this->data();
+ if (data != store_) Allocator::deallocate(data, this->capacity());
+ }
+
+ protected:
+ void grow(std::size_t size) FMT_OVERRIDE;
+
+ public:
+ typedef T value_type;
+ typedef const T &const_reference;
+
+ explicit basic_memory_buffer(const Allocator &alloc = Allocator())
+ : Allocator(alloc) {
+ this->set(store_, SIZE);
+ }
+ ~basic_memory_buffer() { deallocate(); }
+
+ private:
+ // Move data from other to this buffer.
+ void move(basic_memory_buffer &other) {
+ Allocator &this_alloc = *this, &other_alloc = other;
+ this_alloc = std::move(other_alloc);
+ T* data = other.data();
+ std::size_t size = other.size(), capacity = other.capacity();
+ if (data == other.store_) {
+ this->set(store_, capacity);
+ std::uninitialized_copy(other.store_, other.store_ + size,
+ internal::make_checked(store_, capacity));
+ } else {
+ this->set(data, capacity);
+ // Set pointer to the inline array so that delete is not called
+ // when deallocating.
+ other.set(other.store_, 0);
+ }
+ this->resize(size);
+ }
+
+ public:
+ /**
+ \rst
+ Constructs a :class:`fmt::basic_memory_buffer` object moving the content
+ of the other object to it.
+ \endrst
+ */
+ 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) {
+ assert(this != &other);
+ deallocate();
+ move(other);
+ return *this;
+ }
+
+ // Returns a copy of the allocator associated with this buffer.
+ Allocator get_allocator() const { return *this; }
+};
+
+template <typename T, std::size_t SIZE, typename Allocator>
+void basic_memory_buffer<T, SIZE, Allocator>::grow(std::size_t size) {
+ 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);
+ // 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));
+ this->set(new_data, new_capacity);
+ // deallocate must not throw according to the standard, but even if it does,
+ // the buffer already uses the new storage and will deallocate it in
+ // destructor.
+ if (old_data != store_)
+ 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);
+};
+
+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);
+};
+
+#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
+
+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);
+}
+
+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.
+template <typename T>
+class counting_iterator {
+ private:
+ std::size_t count_;
+ mutable T blackhole_;
+
+ 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.
+
+ 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_; }
+};
+
+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);
+}
+
+#if FMT_HAS_CPP_ATTRIBUTE(always_inline)
+# define FMT_ALWAYS_INLINE __attribute__((always_inline))
+#else
+# define FMT_ALWAYS_INLINE
+#endif
+
+template <typename Handler>
+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) {
+ 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)
+ : h.template on<3>(n)
+ : n < 100000 ? h.template on<4>(n)
+ : h.template on<5>(n)
+ : n < 100000000 ? n < 10000000 ? h.template on<6>(n)
+ : h.template on<7>(n)
+ : n < 1000000000 ? h.template on<8>(n)
+ : h.template on<9>(n);
+}
+
+// An lg handler that formats a decimal number.
+// Usage: lg(n, decimal_formatter(buffer));
+class decimal_formatter {
+ private:
+ char *buffer_;
+
+ void write_pair(unsigned N, uint32_t index) {
+ std::memcpy(buffer_ + N, data::DIGITS + index * 2, 2);
+ }
+
+ public:
+ explicit decimal_formatter(char *buf) : buffer_(buf) {}
+
+ template <unsigned N> char *on(uint32_t u) {
+ if (N == 0) {
+ *buffer_ = static_cast<char>(u) + '0';
+ } else if (N == 1) {
+ write_pair(0, u);
+ } else {
+ // The idea of using 4.32 fixed-point numbers is based on
+ // 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);
+ t = ((t * u) >> a) + n / 5 * 4;
+ write_pair(0, t >> 32);
+ for (unsigned i = 2; i < N; i += 2) {
+ t = 100ULL * static_cast<uint32_t>(t);
+ write_pair(i, t >> 32);
+ }
+ if (N % 2 == 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;
+}
+#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) {
+ return Char(thousands_sep_impl<char>(loc));
+}
+
+template <>
+inline wchar_t thousands_sep(locale_ref loc) {
+ return thousands_sep_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) {
+ FMT_ASSERT(num_digits >= 0, "invalid digit count");
+ buffer += num_digits;
+ 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);
+ }
+ 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]);
+ return end;
+}
+
+template <typename OutChar, typename UInt, typename Iterator,
+ typename ThousandsSep>
+inline Iterator format_decimal(
+ Iterator out, UInt value, int num_digits, ThousandsSep 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);
+}
+
+template <typename OutChar, 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());
+}
+
+template <unsigned BASE_BITS, typename Char, typename UInt>
+inline Char *format_uint(Char *buffer, UInt value, int num_digits,
+ bool upper = false) {
+ buffer += num_digits;
+ Char *end = buffer;
+ do {
+ const char *digits = upper ? "0123456789ABCDEF" : "0123456789abcdef";
+ unsigned digit = (value & ((1 << BASE_BITS) - 1));
+ *--buffer = static_cast<Char>(BASE_BITS < 4 ? static_cast<char>('0' + digit)
+ : digits[digit]);
+ } while ((value >>= BASE_BITS) != 0);
+ return end;
+}
+
+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];
+ 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
+#elif !defined(FMT_USE_WINDOWS_H)
+# define FMT_USE_WINDOWS_H 1
+#endif
+
+// Define FMT_USE_WINDOWS_H to 0 to disable use of windows.h.
+// All the functionality that relies on it will be disabled too.
+#if FMT_USE_WINDOWS_H
+// A converter from UTF-8 to UTF-16.
+// It is only provided for Windows since other systems support UTF-8 natively.
+class utf8_to_utf16 {
+ private:
+ wmemory_buffer buffer_;
+
+ public:
+ 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]; }
+ std::wstring str() const { return std::wstring(&buffer_[0], size()); }
+};
+
+// A converter from UTF-16 to UTF-8.
+// It is only provided for Windows since other systems support UTF-8 natively.
+class utf16_to_utf8 {
+ private:
+ memory_buffer buffer_;
+
+ public:
+ utf16_to_utf8() {}
+ 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]; }
+ std::string str() const { return std::string(&buffer_[0], size()); }
+
+ // Performs conversion returning a system error code instead of
+ // throwing exception on conversion error. This method may still throw
+ // in case of memory allocation error.
+ FMT_API int convert(wstring_view s);
+};
+
+FMT_API void format_windows_error(fmt::internal::buffer &out, int error_code,
+ fmt::string_view message) FMT_NOEXCEPT;
+#endif
+
+template <typename T = void>
+struct null {};
+} // namespace internal
+
+enum alignment {
+ ALIGN_DEFAULT, ALIGN_LEFT, ALIGN_RIGHT, ALIGN_CENTER, ALIGN_NUMERIC
+};
+
+// 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_; }
+};
+
+struct core_format_specs {
+ int precision;
+ uint_least8_t flags;
+ char type;
+
+ FMT_CONSTEXPR core_format_specs() : precision(-1), flags(0), type(0) {}
+ FMT_CONSTEXPR bool has(unsigned f) const { return (flags & f) != 0; }
+};
+
+// Format specifiers.
+template <typename Char>
+struct basic_format_specs : align_spec, core_format_specs {
+ FMT_CONSTEXPR basic_format_specs() {}
+};
+
+typedef basic_format_specs<char> format_specs;
+
+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;
+}
+
+namespace internal {
+
+// Formats value using Grisu2 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>
+void sprintf_format(Double, internal::buffer &, core_format_specs);
+
+template <typename Handler>
+FMT_CONSTEXPR void handle_int_type_spec(char spec, Handler &&handler) {
+ switch (spec) {
+ case 0: case 'd':
+ handler.on_dec();
+ break;
+ case 'x': case 'X':
+ handler.on_hex();
+ break;
+ case 'b': case 'B':
+ handler.on_bin();
+ break;
+ case 'o':
+ handler.on_oct();
+ break;
+ case 'n':
+ handler.on_num();
+ break;
+ default:
+ handler.on_error();
+ }
+}
+
+template <typename Handler>
+FMT_CONSTEXPR void handle_float_type_spec(char spec, Handler &&handler) {
+ switch (spec) {
+ case 0: case 'g': case 'G':
+ handler.on_general();
+ break;
+ case 'e': case 'E':
+ handler.on_exp();
+ break;
+ case 'f': case 'F':
+ handler.on_fixed();
+ break;
+ case 'a': case 'A':
+ handler.on_hex();
+ 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) {
+ if (!specs) return handler.on_char();
+ if (specs->type && specs->type != 'c') return handler.on_int();
+ if (specs->align() == ALIGN_NUMERIC || specs->flags != 0)
+ 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) {
+ if (spec == 0 || spec == 's')
+ handler.on_string();
+ else if (spec == 'p')
+ handler.on_pointer();
+ else
+ handler.on_error("invalid type specifier");
+}
+
+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");
+}
+
+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");
+}
+
+template <typename ErrorHandler>
+class int_type_checker : private ErrorHandler {
+ public:
+ FMT_CONSTEXPR explicit int_type_checker(ErrorHandler eh) : ErrorHandler(eh) {}
+
+ FMT_CONSTEXPR void on_dec() {}
+ FMT_CONSTEXPR void on_hex() {}
+ FMT_CONSTEXPR void on_bin() {}
+ FMT_CONSTEXPR void on_oct() {}
+ FMT_CONSTEXPR void on_num() {}
+
+ FMT_CONSTEXPR void on_error() {
+ ErrorHandler::on_error("invalid type specifier");
+ }
+};
+
+template <typename ErrorHandler>
+class float_type_checker : private ErrorHandler {
+ public:
+ FMT_CONSTEXPR explicit float_type_checker(ErrorHandler eh)
+ : ErrorHandler(eh) {}
+
+ FMT_CONSTEXPR void on_general() {}
+ FMT_CONSTEXPR void on_exp() {}
+ FMT_CONSTEXPR void on_fixed() {}
+ FMT_CONSTEXPR void on_hex() {}
+
+ FMT_CONSTEXPR void on_error() {
+ ErrorHandler::on_error("invalid type specifier");
+ }
+};
+
+template <typename ErrorHandler>
+class char_specs_checker : public ErrorHandler {
+ private:
+ char type_;
+
+ public:
+ FMT_CONSTEXPR char_specs_checker(char type, ErrorHandler eh)
+ : ErrorHandler(eh), type_(type) {}
+
+ FMT_CONSTEXPR void on_int() {
+ handle_int_type_spec(type_, int_type_checker<ErrorHandler>(*this));
+ }
+ FMT_CONSTEXPR void on_char() {}
+};
+
+template <typename ErrorHandler>
+class cstring_type_checker : public ErrorHandler {
+ public:
+ FMT_CONSTEXPR explicit cstring_type_checker(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()];
+ if (args.is_packed()) {
+ for (unsigned i = 0;/*nothing*/; ++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.
+ }
+ }
+ }
+ 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.
+ }
+ }
+}
+
+template <typename Range>
+class arg_formatter_base {
+ public:
+ typedef typename Range::value_type char_type;
+ typedef decltype(internal::declval<Range>().begin()) iterator;
+ typedef basic_format_specs<char_type> format_specs;
+
+ private:
+ typedef basic_writer<Range> writer_type;
+ 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) {
+ format_specs specs = specs_ ? *specs_ : format_specs();
+ specs.flags = HASH_FLAG;
+ specs.type = 'x';
+ writer_.write_int(reinterpret_cast<uintptr_t>(p), specs);
+ }
+
+ protected:
+ writer_type &writer() { return writer_; }
+ format_specs *spec() { 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"));
+ 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) {}
+
+ 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(
+ 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) {
+ writer_.write_double(value, specs_ ? *specs_ : format_specs());
+ return out();
+ }
+
+ struct char_spec_handler : internal::error_handler {
+ arg_formatter_base &formatter;
+ char_type value;
+
+ char_spec_handler(arg_formatter_base& f, char_type val)
+ : formatter(f), value(val) {}
+
+ void on_int() {
+ if (formatter.specs_)
+ formatter.writer_.write_int(value, *formatter.specs_);
+ else
+ formatter.writer_.write(value);
+ }
+ void on_char() { formatter.write_char(value); }
+ };
+
+ struct cstring_spec_handler : internal::error_handler {
+ arg_formatter_base &formatter;
+ const char_type *value;
+
+ 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) {
+ if (!specs_) return write(value), out();
+ 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());
+ writer_.write(value, *specs_);
+ } else {
+ writer_.write(value);
+ }
+ return out();
+ }
+
+ iterator operator()(const void *value) {
+ if (specs_)
+ check_pointer_type_spec(specs_->type, internal::error_handler());
+ write_pointer(value);
+ return out();
+ }
+};
+
+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) {
+ assert(begin != end && '0' <= *begin && *begin <= '9');
+ if (*begin == '0') {
+ ++begin;
+ return 0;
+ }
+ unsigned value = 0;
+ // Convert to unsigned to prevent a warning.
+ unsigned max_int = (std::numeric_limits<int>::max)();
+ unsigned big = max_int / 10;
+ do {
+ // Check for overflow.
+ if (value > big) {
+ value = max_int + 1;
+ break;
+ }
+ 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;
+}
+
+template <typename Char, typename Context>
+class custom_formatter: public function<bool> {
+ private:
+ Context &ctx_;
+
+ public:
+ explicit custom_formatter(Context &ctx): ctx_(ctx) {}
+
+ bool operator()(typename basic_format_arg<Context>::handle h) const {
+ h.format(ctx_);
+ return true;
+ }
+
+ 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
+ };
+};
+
+template <typename ErrorHandler>
+class width_checker: public function<unsigned long long> {
+ 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");
+ 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) {
+ handler_.on_error("width is not integer");
+ return 0;
+ }
+
+ private:
+ ErrorHandler &handler_;
+};
+
+template <typename ErrorHandler>
+class precision_checker: public function<unsigned long long> {
+ public:
+ 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");
+ 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) {
+ handler_.on_error("precision is not integer");
+ return 0;
+ }
+
+ private:
+ ErrorHandler &handler_;
+};
+
+// A format specifier handler that sets fields in basic_format_specs.
+template <typename Char>
+class specs_setter {
+ public:
+ 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 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_zero() {
+ specs_.align_ = ALIGN_NUMERIC;
+ specs_.fill_ = '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 end_precision() {}
+
+ FMT_CONSTEXPR void on_type(Char type) {
+ specs_.type = static_cast<char>(type);
+ }
+
+ protected:
+ basic_format_specs<Char> &specs_;
+};
+
+// A format specifier handler that checks if specifiers are consistent with the
+// argument type.
+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) {}
+
+ FMT_CONSTEXPR specs_checker(const specs_checker &other)
+ : Handler(other), arg_type_(other.arg_type_) {}
+
+ FMT_CONSTEXPR void on_align(alignment align) {
+ if (align == ALIGN_NUMERIC)
+ require_numeric_argument();
+ Handler::on_align(align);
+ }
+
+ FMT_CONSTEXPR void on_plus() {
+ check_sign();
+ Handler::on_plus();
+ }
+
+ FMT_CONSTEXPR void on_minus() {
+ check_sign();
+ Handler::on_minus();
+ }
+
+ FMT_CONSTEXPR void on_space() {
+ check_sign();
+ Handler::on_space();
+ }
+
+ FMT_CONSTEXPR void on_hash() {
+ require_numeric_argument();
+ Handler::on_hash();
+ }
+
+ FMT_CONSTEXPR void on_zero() {
+ 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");
+ }
+
+ 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_;
+};
+
+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) {
+ unsigned long long big_value =
+ visit_format_arg(Handler<ErrorHandler>(eh), arg);
+ if (big_value > to_unsigned((std::numeric_limits<int>::max)()))
+ eh.on_error("number is too big");
+ value = static_cast<T>(big_value);
+}
+
+struct auto_id {};
+
+// The standard format specifier handler with checking.
+template <typename Context>
+class specs_handler: public specs_setter<typename Context::char_type> {
+ public:
+ typedef typename Context::char_type char_type;
+
+ FMT_CONSTEXPR specs_handler(
+ basic_format_specs<char_type> &specs, Context &ctx)
+ : specs_setter<char_type>(specs), 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_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);
+ }
+
+ private:
+ FMT_CONSTEXPR basic_format_arg<Context> get_arg(auto_id) {
+ return context_.next_arg();
+ }
+
+ 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);
+ }
+
+ Context &context_;
+};
+
+// An argument reference.
+template <typename Char>
+struct arg_ref {
+ enum Kind { NONE, INDEX, NAME };
+
+ 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()};
+ }
+
+ FMT_CONSTEXPR arg_ref &operator=(unsigned idx) {
+ kind = INDEX;
+ index = idx;
+ return *this;
+ }
+
+ Kind kind;
+ union {
+ unsigned index;
+ string_value<Char> name; // This is not string_view because of gcc 4.4.
+ };
+};
+
+// 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).
+template <typename Char>
+struct dynamic_format_specs : basic_format_specs<Char> {
+ arg_ref<Char> width_ref;
+ arg_ref<Char> precision_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> {
+ public:
+ typedef typename ParseContext::char_type 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(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) {
+ specs_.width_ref = make_arg_ref(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) {
+ context_.on_error(message);
+ }
+
+ private:
+ typedef arg_ref<char_type> arg_ref_type;
+
+ template <typename Id>
+ FMT_CONSTEXPR arg_ref_type make_arg_ref(Id arg_id) {
+ context_.check_arg_id(arg_id);
+ return arg_ref_type(arg_id);
+ }
+
+ FMT_CONSTEXPR arg_ref_type make_arg_ref(auto_id) {
+ return arg_ref_type(context_.next_arg_id());
+ }
+
+ 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) {
+ assert(begin != end);
+ Char c = *begin;
+ if (c == '}' || c == ':')
+ return handler(), begin;
+ if (c >= '0' && c <= '9') {
+ unsigned index = parse_nonnegative_int(begin, end, handler);
+ if (begin == end || (*begin != '}' && *begin != ':'))
+ return handler.on_error("invalid format string"), begin;
+ handler(index);
+ return begin;
+ }
+ if (!is_name_start(c))
+ return handler.on_error("invalid format string"), begin;
+ auto it = begin;
+ do {
+ ++it;
+ } while (it != end && (is_name_start(c = *it) || ('0' <= c && c <= '9')));
+ handler(basic_string_view<Char>(begin, to_unsigned(it - begin)));
+ return it;
+}
+
+// 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) {}
+
+ 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()(basic_string_view<Char> id) {
+ handler.on_dynamic_width(id);
+ }
+
+ FMT_CONSTEXPR void on_error(const char *message) {
+ handler.on_error(message);
+ }
+
+ 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) {}
+
+ 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()(basic_string_view<Char> id) {
+ handler.on_dynamic_precision(id);
+ }
+
+ FMT_CONSTEXPR void on_error(const char *message) { handler.on_error(message); }
+
+ 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_ASSERT(begin != end, "");
+ alignment align = ALIGN_DEFAULT;
+ int i = 0;
+ if (begin + 1 != end) ++i;
+ do {
+ switch (static_cast<char>(begin[i])) {
+ case '<':
+ align = ALIGN_LEFT;
+ break;
+ case '>':
+ align = ALIGN_RIGHT;
+ break;
+ case '=':
+ align = ALIGN_NUMERIC;
+ break;
+ case '^':
+ align = ALIGN_CENTER;
+ break;
+ }
+ if (align != ALIGN_DEFAULT) {
+ if (i > 0) {
+ auto c = *begin;
+ if (c == '{')
+ return handler.on_error("invalid fill character '{'"), begin;
+ begin += 2;
+ handler.on_fill(c);
+ } else ++begin;
+ handler.on_align(align);
+ break;
+ }
+ } while (i-- > 0);
+ return begin;
+}
+
+template <typename Char, typename 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));
+ } else if (*begin == '{') {
+ ++begin;
+ if (begin != end)
+ begin = parse_arg_id(begin, end, width_adapter<Handler, Char>(handler));
+ if (begin == end || *begin != '}')
+ return handler.on_error("invalid format string"), begin;
+ ++begin;
+ }
+ 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;
+
+ begin = parse_align(begin, end, handler);
+ if (begin == end) return begin;
+
+ // Parse sign.
+ switch (static_cast<char>(*begin)) {
+ case '+':
+ handler.on_plus();
+ ++begin;
+ break;
+ case '-':
+ handler.on_minus();
+ ++begin;
+ break;
+ case ' ':
+ handler.on_space();
+ ++begin;
+ break;
+ }
+ if (begin == end) return begin;
+
+ if (*begin == '#') {
+ handler.on_hash();
+ if (++begin == end) return begin;
+ }
+
+ // Parse zero flag.
+ if (*begin == '0') {
+ handler.on_zero();
+ if (++begin == end) return begin;
+ }
+
+ begin = parse_width(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();
+ }
+
+ // Parse type.
+ 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) {
+ for (out = first; out != last; ++out) {
+ 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;
+}
+
+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()(basic_string_view<Char> id) {
+ handler.on_arg_id(id);
+ }
+ FMT_CONSTEXPR void on_error(const char *message) {
+ handler.on_error(message);
+ }
+ Handler &handler;
+};
+
+template <bool IS_CONSTEXPR, typename Char, typename 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) {
+ if (begin == end) return;
+ for (;;) {
+ const Char *p = FMT_NULL;
+ if (!find<IS_CONSTEXPR>(begin, end, '}', p))
+ return handler_.on_text(begin, end);
+ ++p;
+ if (p == end || *p != '}')
+ return handler_.on_error("unmatched '}' in format string");
+ handler_.on_text(begin, p);
+ begin = p + 1;
+ }
+ }
+ 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;
+ 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 (static_cast<char>(*p) == '}') {
+ handler.on_arg_id();
+ handler.on_replacement_field(p);
+ } else if (*p == '{') {
+ handler.on_text(p, p + 1);
+ } else {
+ p = parse_arg_id(p, end, id_adapter<Handler, Char>{handler});
+ Char c = p != end ? *p : Char();
+ if (c == '}') {
+ handler.on_replacement_field(p);
+ } else if (c == ':') {
+ p = handler.on_format_specs(p + 1, end);
+ if (p == end || *p != '}')
+ return handler.on_error("unknown format specifier");
+ } else {
+ return handler.on_error("missing '}' in format string");
+ }
+ }
+ begin = p + 1;
+ }
+}
+
+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{};
+ return f.parse(ctx);
+}
+
+template <typename Char, typename ErrorHandler, typename... Args>
+class format_string_checker {
+ 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>...} {}
+
+ 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) {
+ 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;
+
+ size_t size() const {
+ return static_cast<std::size_t>(INF_SIZE + (sign ? 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);
+ }
+ };
+
+ struct double_writer {
+ size_t n;
+ char sign;
+ internal::buffer &buffer;
+
+ 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);
+ --n;
+ }
+ it = internal::copy_str<char_type>(buffer.begin(), buffer.end(), it);
+ }
+ };
+
+ // Formats a floating-point number (double or long double).
+ template <typename T>
+ void write_double(T value, const format_specs &spec);
+
+ 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 Char>
+ friend class internal::arg_formatter_base;
+
+ 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_; }
+
+ 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); }
+
+ /**
+ \rst
+ Formats *value* and writes it to the buffer.
+ \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);
+ }
+
+ void write(double value) {
+ write_double(value, format_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) {
+ write_double(value, format_specs());
+ }
+
+ /** 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;
+ }
+
+ /**
+ \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 align_spec &spec) {
+ write_padded(spec, str_writer<Char>{s, size});
+ }
+
+ 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);
+ }
+
+ 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);
+ }
+};
+
+struct float_spec_handler {
+ char type;
+ bool upper;
+
+ explicit float_spec_handler(char t) : type(t), upper(false) {}
+
+ void on_general() {
+ if (type == 'G')
+ upper = true;
+ else
+ type = 'g';
+ }
+
+ void on_exp() {
+ 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
+ }
+ }
+
+ void on_hex() {
+ if (type == 'A')
+ upper = true;
+ }
+
+ 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) {
+ // Check type.
+ float_spec_handler handler(static_cast<char>(spec.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.
+ if (std::signbit(value)) {
+ sign = '-';
+ value = -value;
+ } else if (spec.has(SIGN_FLAG)) {
+ sign = spec.has(PLUS_FLAG) ? '+' : ' ';
+ }
+
+ 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};
+
+ // 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");
+
+ 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) {
+ if (sign) {
+ auto &&it = reserve(1);
+ *it++ = static_cast<char_type>(sign);
+ sign = 0;
+ if (as.width_)
+ --as.width_;
+ }
+ as.align_ = ALIGN_RIGHT;
+ } else {
+ if (spec.align() == ALIGN_DEFAULT)
+ as.align_ = ALIGN_RIGHT;
+ if (sign)
+ ++n;
+ }
+ write_padded(as, double_writer{n, sign, buffer});
+}
+
+// Reports a system error without throwing an exception.
+// Can be used to report errors from destructors.
+FMT_API void report_system_error(int error_code,
+ string_view message) FMT_NOEXCEPT;
+
+#if FMT_USE_WINDOWS_H
+
+/** A Windows error. */
+class windows_error : public system_error {
+ private:
+ FMT_API void init(int error_code, string_view format_str, format_args args);
+
+ public:
+ /**
+ \rst
+ Constructs a :class:`fmt::windows_error` object with the description
+ of the form
+
+ .. parsed-literal::
+ *<message>*: *<system-message>*
+
+ where *<message>* is the formatted message and *<system-message>* is the
+ system message corresponding to the error code.
+ *error_code* is a Windows error code as given by ``GetLastError``.
+ If *error_code* is not a valid error code such as -1, the system message
+ will look like "error -1".
+
+ **Example**::
+
+ // This throws a windows_error with the description
+ // cannot open file 'madeup': The system cannot find the file specified.
+ // or similar (system message may vary).
+ const char *filename = "madeup";
+ LPOFSTRUCT of = LPOFSTRUCT();
+ HFILE file = OpenFile(filename, &of, OF_READ);
+ if (file == HFILE_ERROR) {
+ throw fmt::windows_error(GetLastError(),
+ "cannot open file '{}'", filename);
+ }
+ \endrst
+ */
+ template <typename... Args>
+ windows_error(int error_code, string_view message, const Args &... args) {
+ init(error_code, message, make_format_args(args...));
+ }
+};
+
+// Reports a Windows error without throwing an exception.
+// Can be used to report errors from destructors.
+FMT_API void report_windows_error(int error_code,
+ string_view message) FMT_NOEXCEPT;
+
+#endif
+
+/** Fast integer formatter. */
+class format_int {
+ private:
+ // Buffer should be large enough to hold all digits (digits10 + 1),
+ // a sign and a null character.
+ enum {BUFFER_SIZE = std::numeric_limits<unsigned long long>::digits10 + 3};
+ mutable char buffer_[BUFFER_SIZE];
+ char *str_;
+
+ // 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.
+ 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];
+ }
+ 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];
+ 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;
+ str_ = format_decimal(abs_value);
+ if (negative)
+ *--str_ = '-';
+ }
+
+ public:
+ explicit format_int(int value) { format_signed(value); }
+ explicit format_int(long value) { format_signed(value); }
+ explicit format_int(long long value) { format_signed(value); }
+ explicit format_int(unsigned value) : str_(format_decimal(value)) {}
+ explicit format_int(unsigned long value) : str_(format_decimal(value)) {}
+ explicit format_int(unsigned long long value) : str_(format_decimal(value)) {}
+
+ /** Returns the number of characters written to the output buffer. */
+ std::size_t size() const {
+ 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_; }
+
+ /**
+ Returns a pointer to the output buffer content with terminating null
+ character appended.
+ */
+ const char *c_str() const {
+ buffer_[BUFFER_SIZE - 1] = '\0';
+ return str_;
+ }
+
+ /**
+ \rst
+ Returns the content of the output buffer as an ``std::string``.
+ \endrst
+ */
+ 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.
+template <typename T, typename Char>
+struct formatter<
+ T, Char,
+ typename std::enable_if<internal::format_type<
+ typename buffer_context<Char>::type, T>::value>::type> {
+
+ // 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);
+ 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::named_arg_type:
+ FMT_ASSERT(false, "invalid argument type");
+ break;
+ case internal::int_type:
+ case internal::uint_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));
+ break;
+ case internal::char_type:
+ handle_char_specs(
+ &specs_,
+ internal::char_specs_checker<decltype(eh)>(type_spec, eh));
+ break;
+ case internal::double_type:
+ case internal::long_double_type:
+ handle_float_type_spec(
+ type_spec, 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));
+ break;
+ case internal::string_type:
+ internal::check_string_type_spec(type_spec, eh);
+ break;
+ case internal::pointer_type:
+ internal::check_pointer_type_spec(type_spec, eh);
+ break;
+ case internal::custom_type:
+ // Custom format specifiers should be checked in parse functions of
+ // formatter specializations.
+ break;
+ }
+ return it;
+ }
+
+ template <typename FormatContext>
+ auto format(const T &val, FormatContext &ctx) -> decltype(ctx.out()) {
+ internal::handle_dynamic_spec<internal::width_checker>(
+ specs_.width_, specs_.width_ref, ctx);
+ 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));
+ }
+
+ private:
+ internal::dynamic_format_specs<Char> specs_;
+};
+
+// A formatter for types known only at run time such as variant alternatives.
+//
+// Usage:
+// typedef std::variant<int, std::string> variant;
+// 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 {
+ private:
+ struct null_handler: internal::error_handler {
+ void on_align(alignment) {}
+ void on_plus() {}
+ void on_minus() {}
+ void on_space() {}
+ void on_hash() {}
+ };
+
+ public:
+ template <typename ParseContext>
+ auto parse(ParseContext &ctx) -> decltype(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()) {
+ 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))
+ 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));
+ return ctx.out();
+ }
+
+ private:
+ template <typename Context>
+ void handle_specs(Context &ctx) {
+ internal::handle_dynamic_spec<internal::width_checker>(
+ specs_.width_, specs_.width_ref, ctx);
+ internal::handle_dynamic_spec<internal::precision_checker>(
+ specs_.precision, specs_.precision_ref, ctx);
+ }
+
+ internal::dynamic_format_specs<Char> specs_;
+};
+
+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());
+ format_arg arg = map_.find(name);
+ if (arg.type() == internal::none_type)
+ this->on_error("argument not found");
+ return arg;
+}
+
+template <typename ArgFormatter, typename Char, typename Context>
+struct format_handler : internal::error_handler {
+ typedef typename ArgFormatter::range 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) {}
+
+ 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);
+ 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 on_replacement_field(const Char *p) {
+ context.parse_context().advance_to(p);
+ internal::custom_formatter<Char, Context> f(context);
+ if (!visit_format_arg(f, arg))
+ context.advance_to(visit_format_arg(ArgFormatter(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();
+ basic_format_specs<Char> specs;
+ using internal::specs_handler;
+ internal::specs_checker<specs_handler<Context>>
+ handler(specs_handler<Context>(specs, 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));
+ return begin;
+ }
+
+ 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,
+ basic_format_args<Context> args,
+ internal::locale_ref loc = internal::locale_ref()) {
+ format_handler<ArgFormatter, Char, Context> h(out, format_str, args, loc);
+ internal::parse_format_string<false>(format_str, h);
+ return h.context.out();
+}
+
+// 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 It, typename Char>
+struct arg_join {
+ 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) {}
+};
+
+template <typename It, typename 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)
+ -> decltype(ctx.out()) {
+ typedef formatter<typename std::iterator_traits<It>::value_type, Char> base;
+ auto it = value.begin;
+ auto out = ctx.out();
+ if (it != value.end) {
+ out = base::format(*it++, ctx);
+ while (it != value.end) {
+ out = std::copy(value.sep.begin(), value.sep.end(), out);
+ ctx.advance_to(out);
+ out = base::format(*it++, ctx);
+ }
+ }
+ return out;
+ }
+};
+
+template <typename It>
+arg_join<It, char> join(It begin, It end, string_view sep) {
+ return arg_join<It, char>(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);
+}
+
+// The following causes ICE in gcc 4.4.
+#if FMT_USE_TRAILING_RETURN && (!FMT_GCC_VERSION || FMT_GCC_VERSION >= 405)
+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);
+}
+
+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);
+}
+#endif
+
+/**
+ \rst
+ Converts *value* to ``std::string`` using the default format for type *T*.
+ It doesn't support user-defined types with custom formatters.
+
+ **Example**::
+
+ #include <fmt/format.h>
+
+ 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;
+}
+
+/**
+ 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 Char, std::size_t SIZE>
+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) {
+ 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) {
+ internal::check_format_string<Args...>(format_str);
+ typedef typename buffer_context<Char>::type context;
+ format_arg_store<context, Args...> as{args...};
+ return internal::vformat_to(buf, to_string_view(format_str),
+ basic_format_args<context>(as));
+}
+
+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; };
+
+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;
+ return vformat_to<arg_formatter<range>>(range(out),
+ to_string_view(format_str), args);
+}
+
+/**
+ \rst
+ Formats arguments, writes the result to the output iterator ``out`` and returns
+ the iterator past the end of the output range.
+
+ **Example**::
+
+ std::vector<char> out;
+ 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) {
+ 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...};
+ return vformat_to(out, to_string_view(format_str),
+ basic_format_args<context>(as));
+}
+
+template <typename OutputIt>
+struct format_to_n_result {
+ /** Iterator past the end of the output range. */
+ OutputIt out;
+ /** Total (not truncated) output size. */
+ std::size_t size;
+};
+
+template <typename OutputIt, typename Char = typename OutputIt::value_type>
+struct 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;
+};
+
+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 typename std::enable_if<
+ internal::is_output_iterator<OutputIt>::value,
+ format_to_n_result<OutputIt>>::type 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);
+ return {it.base(), it.count()};
+}
+
+/**
+ \rst
+ Formats arguments, writes up to ``n`` characters of the result to the output
+ iterator ``out`` and returns the total output size and the iterator past the
+ 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) {
+ 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...);
+ return vformat_to_n(out, n, to_string_view(format_str),
+ typename format_to_n_args<OutputIt, Char>::type(as));
+}
+
+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_memory_buffer<Char> buffer;
+ internal::vformat_to(buffer, format_str, args);
+ return fmt::to_string(buffer);
+}
+
+/**
+ Returns the number of characters in the output of
+ ``format(format_str, args...)``.
+ */
+template <typename... 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 {
+ public:
+ template <typename... Args>
+ std::basic_string<Char> operator()(const 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)));
+ (void)invalid_format;
+ return format(s, args...);
+ }
+};
+# else
+template <typename Char>
+struct udl_formatter {
+ const Char *str;
+
+ template <typename... Args>
+ auto operator()(Args &&... args) const
+ -> decltype(format(str, std::forward<Args>(args)...)) {
+ return format(str, std::forward<Args>(args)...);
+ }
+};
+# endif // FMT_UDL_TEMPLATE
+
+template <typename Char>
+struct udl_arg {
+ const Char *str;
+
+ template <typename T>
+ named_arg<T, Char> operator=(T &&value) const {
+ return {str, std::forward<T>(value)};
+ }
+};
+
+} // namespace internal
+
+inline namespace literals {
+
+# if FMT_UDL_TEMPLATE
+template <typename Char, Char... CHARS>
+FMT_CONSTEXPR internal::udl_formatter<Char, CHARS...> operator""_format() {
+ return {};
+}
+# else
+/**
+ \rst
+ User-defined literal equivalent of :func:`fmt::format`.
+
+ **Example**::
+
+ using namespace fmt::literals;
+ 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
+
+/**
+ \rst
+ User-defined literal equivalent of :func:`fmt::arg`.
+
+ **Example**::
+
+ using namespace fmt::literals;
+ fmt::print("Elapsed time: {s:.2f} seconds", "s"_a=1.23);
+ \endrst
+ */
+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_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{}; \
+ }()
+
+#if defined(FMT_STRING_ALIAS) && FMT_STRING_ALIAS
+/**
+ \rst
+ Constructs a compile-time format string. This macro is disabled by default to
+ prevent potential name collisions. To enable it define ``FMT_STRING_ALIAS`` to
+ 1 before including ``fmt/format.h``.
+
+ **Example**::
+
+ #define FMT_STRING_ALIAS 1
+ #include <fmt/format.h>
+ // A compile-time error because 'd' is an invalid specifier for strings.
+ std::string s = format(fmt("{:d}"), "foo");
+ \endrst
+ */
+# define fmt(s) FMT_STRING(s)
+#endif
+
+#ifdef FMT_HEADER_ONLY
+# 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
+#endif
+
+#endif // FMT_FORMAT_H_
projects / thirdparty / ccache.git / commitdiff
