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Diffstat (limited to 'matching/include/spdlog/fmt/bundled/format.h')
| -rw-r--r-- | matching/include/spdlog/fmt/bundled/format.h | 3555 |
1 files changed, 3555 insertions, 0 deletions
diff --git a/matching/include/spdlog/fmt/bundled/format.h b/matching/include/spdlog/fmt/bundled/format.h new file mode 100644 index 0000000..1bb24a5 --- /dev/null +++ b/matching/include/spdlog/fmt/bundled/format.h @@ -0,0 +1,3555 @@ +/* + 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_ |