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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, 0 insertions, 3555 deletions
diff --git a/matching/include/spdlog/fmt/bundled/format.h b/matching/include/spdlog/fmt/bundled/format.h deleted file mode 100644 index 1bb24a5..0000000 --- a/matching/include/spdlog/fmt/bundled/format.h +++ /dev/null @@ -1,3555 +0,0 @@ -/* - 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_ |