From 71f0ee98ccc85d41ba7587d122c83011ab1e25c3 Mon Sep 17 00:00:00 2001 From: F1F7Y <64418963+F1F7Y@users.noreply.github.com> Date: Fri, 30 Jun 2023 03:10:24 +0200 Subject: Reorganize third-party dependencies into `thirdparty` directory (#491) * rename `include` to `thirdparty` * remove duplicate minhook in wsock32 * move minhook into its own directory * move openssl lib into separate directories --- thirdparty/spdlog/fmt/bundled/core.h | 2122 ++++++++++++++++++++++++++++++++++ 1 file changed, 2122 insertions(+) create mode 100644 thirdparty/spdlog/fmt/bundled/core.h (limited to 'thirdparty/spdlog/fmt/bundled/core.h') diff --git a/thirdparty/spdlog/fmt/bundled/core.h b/thirdparty/spdlog/fmt/bundled/core.h new file mode 100644 index 00000000..0a81e0cc --- /dev/null +++ b/thirdparty/spdlog/fmt/bundled/core.h @@ -0,0 +1,2122 @@ +// Formatting library for C++ - the core API +// +// Copyright (c) 2012 - present, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_CORE_H_ +#define FMT_CORE_H_ + +#include // std::FILE +#include +#include +#include +#include +#include +#include +#include + +// The fmt library version in the form major * 10000 + minor * 100 + patch. +#define FMT_VERSION 70103 + +#ifdef __clang__ +# define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__) +#else +# define FMT_CLANG_VERSION 0 +#endif + +#if defined(__GNUC__) && !defined(__clang__) +# define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__) +#else +# define FMT_GCC_VERSION 0 +#endif + +#if defined(__INTEL_COMPILER) +# define FMT_ICC_VERSION __INTEL_COMPILER +#else +# define FMT_ICC_VERSION 0 +#endif + +#if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__) +# define FMT_HAS_GXX_CXX11 FMT_GCC_VERSION +#else +# define FMT_HAS_GXX_CXX11 0 +#endif + +#ifdef __NVCC__ +# define FMT_NVCC __NVCC__ +#else +# define FMT_NVCC 0 +#endif + +#ifdef _MSC_VER +# define FMT_MSC_VER _MSC_VER +# define FMT_SUPPRESS_MSC_WARNING(n) __pragma(warning(suppress : n)) +#else +# define FMT_MSC_VER 0 +# define FMT_SUPPRESS_MSC_WARNING(n) +#endif + +#ifdef __has_feature +# define FMT_HAS_FEATURE(x) __has_feature(x) +#else +# define FMT_HAS_FEATURE(x) 0 +#endif + +#if defined(__has_include) && !defined(__INTELLISENSE__) && \ + (!FMT_ICC_VERSION || FMT_ICC_VERSION >= 1600) +# define FMT_HAS_INCLUDE(x) __has_include(x) +#else +# define FMT_HAS_INCLUDE(x) 0 +#endif + +#ifdef __has_cpp_attribute +# define FMT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x) +#else +# define FMT_HAS_CPP_ATTRIBUTE(x) 0 +#endif + +#define FMT_HAS_CPP14_ATTRIBUTE(attribute) \ + (__cplusplus >= 201402L && FMT_HAS_CPP_ATTRIBUTE(attribute)) + +#define FMT_HAS_CPP17_ATTRIBUTE(attribute) \ + (__cplusplus >= 201703L && FMT_HAS_CPP_ATTRIBUTE(attribute)) + +// Check if relaxed C++14 constexpr is supported. +// GCC doesn't allow throw in constexpr until version 6 (bug 67371). +#ifndef FMT_USE_CONSTEXPR +# define FMT_USE_CONSTEXPR \ + (FMT_HAS_FEATURE(cxx_relaxed_constexpr) || FMT_MSC_VER >= 1910 || \ + (FMT_GCC_VERSION >= 600 && __cplusplus >= 201402L)) && \ + !FMT_NVCC && !FMT_ICC_VERSION +#endif +#if FMT_USE_CONSTEXPR +# define FMT_CONSTEXPR constexpr +# define FMT_CONSTEXPR_DECL constexpr +#else +# define FMT_CONSTEXPR inline +# define FMT_CONSTEXPR_DECL +#endif + +#ifndef FMT_OVERRIDE +# if FMT_HAS_FEATURE(cxx_override_control) || \ + (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1900 +# define FMT_OVERRIDE override +# else +# define FMT_OVERRIDE +# endif +#endif + +// Check if exceptions are disabled. +#ifndef FMT_EXCEPTIONS +# if (defined(__GNUC__) && !defined(__EXCEPTIONS)) || \ + FMT_MSC_VER && !_HAS_EXCEPTIONS +# define FMT_EXCEPTIONS 0 +# else +# define FMT_EXCEPTIONS 1 +# endif +#endif + +// Define FMT_USE_NOEXCEPT to make fmt use noexcept (C++11 feature). +#ifndef FMT_USE_NOEXCEPT +# define FMT_USE_NOEXCEPT 0 +#endif + +#if FMT_USE_NOEXCEPT || FMT_HAS_FEATURE(cxx_noexcept) || \ + (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1900 +# define FMT_DETECTED_NOEXCEPT noexcept +# define FMT_HAS_CXX11_NOEXCEPT 1 +#else +# define FMT_DETECTED_NOEXCEPT throw() +# define FMT_HAS_CXX11_NOEXCEPT 0 +#endif + +#ifndef FMT_NOEXCEPT +# if FMT_EXCEPTIONS || FMT_HAS_CXX11_NOEXCEPT +# define FMT_NOEXCEPT FMT_DETECTED_NOEXCEPT +# else +# define FMT_NOEXCEPT +# endif +#endif + +// [[noreturn]] is disabled on MSVC and NVCC because of bogus unreachable code +// warnings. +#if FMT_EXCEPTIONS && FMT_HAS_CPP_ATTRIBUTE(noreturn) && !FMT_MSC_VER && \ + !FMT_NVCC +# define FMT_NORETURN [[noreturn]] +#else +# define FMT_NORETURN +#endif + +#ifndef FMT_DEPRECATED +# if FMT_HAS_CPP14_ATTRIBUTE(deprecated) || FMT_MSC_VER >= 1900 +# define FMT_DEPRECATED [[deprecated]] +# else +# if (defined(__GNUC__) && !defined(__LCC__)) || defined(__clang__) +# define FMT_DEPRECATED __attribute__((deprecated)) +# elif FMT_MSC_VER +# define FMT_DEPRECATED __declspec(deprecated) +# else +# define FMT_DEPRECATED /* deprecated */ +# endif +# endif +#endif + +// Workaround broken [[deprecated]] in the Intel, PGI and NVCC compilers. +#if FMT_ICC_VERSION || defined(__PGI) || FMT_NVCC +# define FMT_DEPRECATED_ALIAS +#else +# define FMT_DEPRECATED_ALIAS FMT_DEPRECATED +#endif + +#ifndef FMT_INLINE +# if FMT_GCC_VERSION || FMT_CLANG_VERSION +# define FMT_INLINE inline __attribute__((always_inline)) +# else +# define FMT_INLINE inline +# endif +#endif + +#ifndef FMT_USE_INLINE_NAMESPACES +# if FMT_HAS_FEATURE(cxx_inline_namespaces) || FMT_GCC_VERSION >= 404 || \ + (FMT_MSC_VER >= 1900 && !_MANAGED) +# define FMT_USE_INLINE_NAMESPACES 1 +# else +# define FMT_USE_INLINE_NAMESPACES 0 +# endif +#endif + +#ifndef FMT_BEGIN_NAMESPACE +# if FMT_USE_INLINE_NAMESPACES +# define FMT_INLINE_NAMESPACE inline namespace +# define FMT_END_NAMESPACE \ + } \ + } +# else +# define FMT_INLINE_NAMESPACE namespace +# define FMT_END_NAMESPACE \ + } \ + using namespace v7; \ + } +# endif +# define FMT_BEGIN_NAMESPACE \ + namespace fmt { \ + FMT_INLINE_NAMESPACE v7 { +#endif + +#if !defined(FMT_HEADER_ONLY) && defined(_WIN32) +# define FMT_CLASS_API FMT_SUPPRESS_MSC_WARNING(4275) +# ifdef FMT_EXPORT +# define FMT_API __declspec(dllexport) +# define FMT_EXTERN_TEMPLATE_API FMT_API +# define FMT_EXPORTED +# elif defined(FMT_SHARED) +# define FMT_API __declspec(dllimport) +# define FMT_EXTERN_TEMPLATE_API FMT_API +# endif +#else +# define FMT_CLASS_API +#endif +#ifndef FMT_API +# define FMT_API +#endif +#ifndef FMT_EXTERN_TEMPLATE_API +# define FMT_EXTERN_TEMPLATE_API +#endif +#ifndef FMT_INSTANTIATION_DEF_API +# define FMT_INSTANTIATION_DEF_API FMT_API +#endif + +#ifndef FMT_HEADER_ONLY +# define FMT_EXTERN extern +#else +# define FMT_EXTERN +#endif + +// libc++ supports string_view in pre-c++17. +#if (FMT_HAS_INCLUDE() && \ + (__cplusplus > 201402L || defined(_LIBCPP_VERSION))) || \ + (defined(_MSVC_LANG) && _MSVC_LANG > 201402L && _MSC_VER >= 1910) +# include +# define FMT_USE_STRING_VIEW +#elif FMT_HAS_INCLUDE("experimental/string_view") && __cplusplus >= 201402L +# include +# define FMT_USE_EXPERIMENTAL_STRING_VIEW +#endif + +#ifndef FMT_UNICODE +# define FMT_UNICODE !FMT_MSC_VER +#endif +#if FMT_UNICODE && FMT_MSC_VER +# pragma execution_character_set("utf-8") +#endif + +FMT_BEGIN_NAMESPACE + +// Implementations of enable_if_t and other metafunctions for older systems. +template +using enable_if_t = typename std::enable_if::type; +template +using conditional_t = typename std::conditional::type; +template using bool_constant = std::integral_constant; +template +using remove_reference_t = typename std::remove_reference::type; +template +using remove_const_t = typename std::remove_const::type; +template +using remove_cvref_t = typename std::remove_cv>::type; +template struct type_identity { using type = T; }; +template using type_identity_t = typename type_identity::type; + +struct monostate {}; + +// An enable_if helper to be used in template parameters which results in much +// shorter symbols: https://godbolt.org/z/sWw4vP. Extra parentheses are needed +// to workaround a bug in MSVC 2019 (see #1140 and #1186). +#define FMT_ENABLE_IF(...) enable_if_t<(__VA_ARGS__), int> = 0 + +namespace detail { + +// A helper function to suppress "conditional expression is constant" warnings. +template constexpr T const_check(T value) { return value; } + +FMT_NORETURN FMT_API void assert_fail(const char* file, int line, + const char* message); + +#ifndef FMT_ASSERT +# ifdef NDEBUG +// FMT_ASSERT is not empty to avoid -Werror=empty-body. +# define FMT_ASSERT(condition, message) ((void)0) +# else +# define FMT_ASSERT(condition, message) \ + ((condition) /* void() fails with -Winvalid-constexpr on clang 4.0.1 */ \ + ? (void)0 \ + : ::fmt::detail::assert_fail(__FILE__, __LINE__, (message))) +# endif +#endif + +#if defined(FMT_USE_STRING_VIEW) +template using std_string_view = std::basic_string_view; +#elif defined(FMT_USE_EXPERIMENTAL_STRING_VIEW) +template +using std_string_view = std::experimental::basic_string_view; +#else +template struct std_string_view {}; +#endif + +#ifdef FMT_USE_INT128 +// Do nothing. +#elif defined(__SIZEOF_INT128__) && !FMT_NVCC && \ + !(FMT_CLANG_VERSION && FMT_MSC_VER) +# define FMT_USE_INT128 1 +using int128_t = __int128_t; +using uint128_t = __uint128_t; +#else +# define FMT_USE_INT128 0 +#endif +#if !FMT_USE_INT128 +struct int128_t {}; +struct uint128_t {}; +#endif + +// Casts a nonnegative integer to unsigned. +template +FMT_CONSTEXPR typename std::make_unsigned::type to_unsigned(Int value) { + FMT_ASSERT(value >= 0, "negative value"); + return static_cast::type>(value); +} + +FMT_SUPPRESS_MSC_WARNING(4566) constexpr unsigned char micro[] = "\u00B5"; + +template constexpr bool is_unicode() { + return FMT_UNICODE || sizeof(Char) != 1 || + (sizeof(micro) == 3 && micro[0] == 0xC2 && micro[1] == 0xB5); +} + +#ifdef __cpp_char8_t +using char8_type = char8_t; +#else +enum char8_type : unsigned char {}; +#endif +} // namespace detail + +#ifdef FMT_USE_INTERNAL +namespace internal = detail; // DEPRECATED +#endif + +/** + An implementation of ``std::basic_string_view`` for pre-C++17. It provides a + subset of the API. ``fmt::basic_string_view`` is used for format strings even + if ``std::string_view`` is available to prevent issues when a library is + compiled with a different ``-std`` option than the client code (which is not + recommended). + */ +template class basic_string_view { + private: + const Char* data_; + size_t size_; + + public: + using value_type = Char; + using iterator = const Char*; + + constexpr basic_string_view() FMT_NOEXCEPT : data_(nullptr), size_(0) {} + + /** Constructs a string reference object from a C string and a size. */ + constexpr basic_string_view(const Char* s, size_t count) FMT_NOEXCEPT + : data_(s), + size_(count) {} + + /** + \rst + Constructs a string reference object from a C string computing + the size with ``std::char_traits::length``. + \endrst + */ +#if __cplusplus >= 201703L // C++17's char_traits::length() is constexpr. + FMT_CONSTEXPR +#endif + basic_string_view(const Char* s) + : data_(s), size_(std::char_traits::length(s)) {} + + /** Constructs a string reference from a ``std::basic_string`` object. */ + template + FMT_CONSTEXPR basic_string_view( + const std::basic_string& s) FMT_NOEXCEPT + : data_(s.data()), + size_(s.size()) {} + + template >::value)> + FMT_CONSTEXPR basic_string_view(S s) FMT_NOEXCEPT : data_(s.data()), + size_(s.size()) {} + + /** Returns a pointer to the string data. */ + constexpr const Char* data() const { return data_; } + + /** Returns the string size. */ + constexpr size_t size() const { return size_; } + + constexpr iterator begin() const { return data_; } + constexpr iterator end() const { return data_ + size_; } + + constexpr const Char& operator[](size_t pos) const { return data_[pos]; } + + FMT_CONSTEXPR void remove_prefix(size_t n) { + data_ += n; + size_ -= n; + } + + // Lexicographically compare this string reference to other. + int compare(basic_string_view other) const { + size_t str_size = size_ < other.size_ ? size_ : other.size_; + int result = std::char_traits::compare(data_, other.data_, str_size); + if (result == 0) + result = size_ == other.size_ ? 0 : (size_ < other.size_ ? -1 : 1); + return result; + } + + friend bool operator==(basic_string_view lhs, basic_string_view rhs) { + return lhs.compare(rhs) == 0; + } + friend bool operator!=(basic_string_view lhs, basic_string_view rhs) { + return lhs.compare(rhs) != 0; + } + friend bool operator<(basic_string_view lhs, basic_string_view rhs) { + return lhs.compare(rhs) < 0; + } + friend bool operator<=(basic_string_view lhs, basic_string_view rhs) { + return lhs.compare(rhs) <= 0; + } + friend bool operator>(basic_string_view lhs, basic_string_view rhs) { + return lhs.compare(rhs) > 0; + } + friend bool operator>=(basic_string_view lhs, basic_string_view rhs) { + return lhs.compare(rhs) >= 0; + } +}; + +using string_view = basic_string_view; +using wstring_view = basic_string_view; + +/** Specifies if ``T`` is a character type. Can be specialized by users. */ +template struct is_char : std::false_type {}; +template <> struct is_char : std::true_type {}; +template <> struct is_char : std::true_type {}; +template <> struct is_char : std::true_type {}; +template <> struct is_char : std::true_type {}; +template <> struct is_char : std::true_type {}; + +/** + \rst + Returns a string view of `s`. In order to add custom string type support to + {fmt} provide an overload of `to_string_view` for it in the same namespace as + the type for the argument-dependent lookup to work. + + **Example**:: + + namespace my_ns { + inline string_view to_string_view(const my_string& s) { + return {s.data(), s.length()}; + } + } + std::string message = fmt::format(my_string("The answer is {}"), 42); + \endrst + */ +template ::value)> +inline basic_string_view to_string_view(const Char* s) { + return s; +} + +template +inline basic_string_view to_string_view( + const std::basic_string& s) { + return s; +} + +template +inline basic_string_view to_string_view(basic_string_view s) { + return s; +} + +template >::value)> +inline basic_string_view to_string_view(detail::std_string_view s) { + return s; +} + +// A base class for compile-time strings. It is defined in the fmt namespace to +// make formatting functions visible via ADL, e.g. format(FMT_STRING("{}"), 42). +struct compile_string {}; + +template +struct is_compile_string : std::is_base_of {}; + +template ::value)> +constexpr basic_string_view to_string_view(const S& s) { + return s; +} + +namespace detail { +void to_string_view(...); +using fmt::v7::to_string_view; + +// Specifies whether S is a string type convertible to fmt::basic_string_view. +// It should be a constexpr function but MSVC 2017 fails to compile it in +// enable_if and MSVC 2015 fails to compile it as an alias template. +template +struct is_string : std::is_class()))> { +}; + +template struct char_t_impl {}; +template struct char_t_impl::value>> { + using result = decltype(to_string_view(std::declval())); + using type = typename result::value_type; +}; + +// Reports a compile-time error if S is not a valid format string. +template ::value)> +FMT_INLINE void check_format_string(const S&) { +#ifdef FMT_ENFORCE_COMPILE_STRING + static_assert(is_compile_string::value, + "FMT_ENFORCE_COMPILE_STRING requires all format strings to use " + "FMT_STRING."); +#endif +} +template ::value)> +void check_format_string(S); + +struct error_handler { + constexpr error_handler() = default; + constexpr error_handler(const error_handler&) = default; + + // This function is intentionally not constexpr to give a compile-time error. + FMT_NORETURN FMT_API void on_error(const char* message); +}; +} // namespace detail + +/** String's character type. */ +template using char_t = typename detail::char_t_impl::type; + +/** + \rst + Parsing context consisting of a format string range being parsed and an + argument counter for automatic indexing. + + You can use one of the following type aliases for common character types: + + +-----------------------+-------------------------------------+ + | Type | Definition | + +=======================+=====================================+ + | format_parse_context | basic_format_parse_context | + +-----------------------+-------------------------------------+ + | wformat_parse_context | basic_format_parse_context | + +-----------------------+-------------------------------------+ + \endrst + */ +template +class basic_format_parse_context : private ErrorHandler { + private: + basic_string_view format_str_; + int next_arg_id_; + + public: + using char_type = Char; + using iterator = typename basic_string_view::iterator; + + explicit constexpr basic_format_parse_context( + basic_string_view format_str, ErrorHandler eh = {}, + int next_arg_id = 0) + : ErrorHandler(eh), format_str_(format_str), next_arg_id_(next_arg_id) {} + + /** + Returns an iterator to the beginning of the format string range being + parsed. + */ + constexpr iterator begin() const FMT_NOEXCEPT { return format_str_.begin(); } + + /** + Returns an iterator past the end of the format string range being parsed. + */ + constexpr iterator end() const FMT_NOEXCEPT { return format_str_.end(); } + + /** Advances the begin iterator to ``it``. */ + FMT_CONSTEXPR void advance_to(iterator it) { + format_str_.remove_prefix(detail::to_unsigned(it - begin())); + } + + /** + Reports an error if using the manual argument indexing; otherwise returns + the next argument index and switches to the automatic indexing. + */ + FMT_CONSTEXPR int next_arg_id() { + // Don't check if the argument id is valid to avoid overhead and because it + // will be checked during formatting anyway. + if (next_arg_id_ >= 0) return next_arg_id_++; + on_error("cannot switch from manual to automatic argument indexing"); + return 0; + } + + /** + Reports an error if using the automatic argument indexing; otherwise + switches to the manual indexing. + */ + FMT_CONSTEXPR void check_arg_id(int) { + if (next_arg_id_ > 0) + on_error("cannot switch from automatic to manual argument indexing"); + else + next_arg_id_ = -1; + } + + FMT_CONSTEXPR void check_arg_id(basic_string_view) {} + + FMT_CONSTEXPR void on_error(const char* message) { + ErrorHandler::on_error(message); + } + + constexpr ErrorHandler error_handler() const { return *this; } +}; + +using format_parse_context = basic_format_parse_context; +using wformat_parse_context = basic_format_parse_context; + +template class basic_format_arg; +template class basic_format_args; +template class dynamic_format_arg_store; + +// A formatter for objects of type T. +template +struct formatter { + // A deleted default constructor indicates a disabled formatter. + formatter() = delete; +}; + +// Specifies if T has an enabled formatter specialization. A type can be +// formattable even if it doesn't have a formatter e.g. via a conversion. +template +using has_formatter = + std::is_constructible>; + +// Checks whether T is a container with contiguous storage. +template struct is_contiguous : std::false_type {}; +template +struct is_contiguous> : std::true_type {}; + +namespace detail { + +// Extracts a reference to the container from back_insert_iterator. +template +inline Container& get_container(std::back_insert_iterator it) { + using bi_iterator = std::back_insert_iterator; + struct accessor : bi_iterator { + accessor(bi_iterator iter) : bi_iterator(iter) {} + using bi_iterator::container; + }; + return *accessor(it).container; +} + +/** + \rst + A contiguous memory buffer with an optional growing ability. It is an internal + class and shouldn't be used directly, only via `~fmt::basic_memory_buffer`. + \endrst + */ +template class buffer { + private: + T* ptr_; + size_t size_; + size_t capacity_; + + protected: + // Don't initialize ptr_ since it is not accessed to save a few cycles. + FMT_SUPPRESS_MSC_WARNING(26495) + buffer(size_t sz) FMT_NOEXCEPT : size_(sz), capacity_(sz) {} + + buffer(T* p = nullptr, size_t sz = 0, size_t cap = 0) FMT_NOEXCEPT + : ptr_(p), + size_(sz), + capacity_(cap) {} + + ~buffer() = default; + + /** Sets the buffer data and capacity. */ + void set(T* buf_data, size_t buf_capacity) FMT_NOEXCEPT { + ptr_ = buf_data; + capacity_ = buf_capacity; + } + + /** Increases the buffer capacity to hold at least *capacity* elements. */ + virtual void grow(size_t capacity) = 0; + + public: + using value_type = T; + using const_reference = const T&; + + buffer(const buffer&) = delete; + void operator=(const buffer&) = delete; + + T* begin() FMT_NOEXCEPT { return ptr_; } + T* end() FMT_NOEXCEPT { return ptr_ + size_; } + + const T* begin() const FMT_NOEXCEPT { return ptr_; } + const T* end() const FMT_NOEXCEPT { return ptr_ + size_; } + + /** Returns the size of this buffer. */ + size_t size() const FMT_NOEXCEPT { return size_; } + + /** Returns the capacity of this buffer. */ + size_t capacity() const FMT_NOEXCEPT { return capacity_; } + + /** Returns a pointer to the buffer data. */ + T* data() FMT_NOEXCEPT { return ptr_; } + + /** Returns a pointer to the buffer data. */ + const T* data() const FMT_NOEXCEPT { return ptr_; } + + /** Clears this buffer. */ + void clear() { size_ = 0; } + + // Tries resizing the buffer to contain *count* elements. If T is a POD type + // the new elements may not be initialized. + void try_resize(size_t count) { + try_reserve(count); + size_ = count <= capacity_ ? count : capacity_; + } + + // Tries increasing the buffer capacity to *new_capacity*. It can increase the + // capacity by a smaller amount than requested but guarantees there is space + // for at least one additional element either by increasing the capacity or by + // flushing the buffer if it is full. + void try_reserve(size_t new_capacity) { + if (new_capacity > capacity_) grow(new_capacity); + } + + void push_back(const T& value) { + try_reserve(size_ + 1); + ptr_[size_++] = value; + } + + /** Appends data to the end of the buffer. */ + template void append(const U* begin, const U* end); + + template T& operator[](I index) { return ptr_[index]; } + template const T& operator[](I index) const { + return ptr_[index]; + } +}; + +struct buffer_traits { + explicit buffer_traits(size_t) {} + size_t count() const { return 0; } + size_t limit(size_t size) { return size; } +}; + +class fixed_buffer_traits { + private: + size_t count_ = 0; + size_t limit_; + + public: + explicit fixed_buffer_traits(size_t limit) : limit_(limit) {} + size_t count() const { return count_; } + size_t limit(size_t size) { + size_t n = limit_ > count_ ? limit_ - count_ : 0; + count_ += size; + return size < n ? size : n; + } +}; + +// A buffer that writes to an output iterator when flushed. +template +class iterator_buffer final : public Traits, public buffer { + private: + OutputIt out_; + enum { buffer_size = 256 }; + T data_[buffer_size]; + + protected: + void grow(size_t) final FMT_OVERRIDE { + if (this->size() == buffer_size) flush(); + } + void flush(); + + public: + explicit iterator_buffer(OutputIt out, size_t n = buffer_size) + : Traits(n), + buffer(data_, 0, buffer_size), + out_(out) {} + ~iterator_buffer() { flush(); } + + OutputIt out() { + flush(); + return out_; + } + size_t count() const { return Traits::count() + this->size(); } +}; + +template class iterator_buffer final : public buffer { + protected: + void grow(size_t) final FMT_OVERRIDE {} + + public: + explicit iterator_buffer(T* out, size_t = 0) : buffer(out, 0, ~size_t()) {} + + T* out() { return &*this->end(); } +}; + +// A buffer that writes to a container with the contiguous storage. +template +class iterator_buffer, + enable_if_t::value, + typename Container::value_type>> + final : public buffer { + private: + Container& container_; + + protected: + void grow(size_t capacity) final FMT_OVERRIDE { + container_.resize(capacity); + this->set(&container_[0], capacity); + } + + public: + explicit iterator_buffer(Container& c) + : buffer(c.size()), container_(c) {} + explicit iterator_buffer(std::back_insert_iterator out, size_t = 0) + : iterator_buffer(get_container(out)) {} + std::back_insert_iterator out() { + return std::back_inserter(container_); + } +}; + +// A buffer that counts the number of code units written discarding the output. +template class counting_buffer final : public buffer { + private: + enum { buffer_size = 256 }; + T data_[buffer_size]; + size_t count_ = 0; + + protected: + void grow(size_t) final FMT_OVERRIDE { + if (this->size() != buffer_size) return; + count_ += this->size(); + this->clear(); + } + + public: + counting_buffer() : buffer(data_, 0, buffer_size) {} + + size_t count() { return count_ + this->size(); } +}; + +// An output iterator that appends to the buffer. +// It is used to reduce symbol sizes for the common case. +template +class buffer_appender : public std::back_insert_iterator> { + using base = std::back_insert_iterator>; + + public: + explicit buffer_appender(buffer& buf) : base(buf) {} + buffer_appender(base it) : base(it) {} + + buffer_appender& operator++() { + base::operator++(); + return *this; + } + + buffer_appender operator++(int) { + buffer_appender tmp = *this; + ++*this; + return tmp; + } +}; + +// Maps an output iterator into a buffer. +template +iterator_buffer get_buffer(OutputIt); +template buffer& get_buffer(buffer_appender); + +template OutputIt get_buffer_init(OutputIt out) { + return out; +} +template buffer& get_buffer_init(buffer_appender out) { + return get_container(out); +} + +template +auto get_iterator(Buffer& buf) -> decltype(buf.out()) { + return buf.out(); +} +template buffer_appender get_iterator(buffer& buf) { + return buffer_appender(buf); +} + +template +struct fallback_formatter { + fallback_formatter() = delete; +}; + +// Specifies if T has an enabled fallback_formatter specialization. +template +using has_fallback_formatter = + std::is_constructible>; + +struct view {}; + +template struct named_arg : view { + const Char* name; + const T& value; + named_arg(const Char* n, const T& v) : name(n), value(v) {} +}; + +template struct named_arg_info { + const Char* name; + int id; +}; + +template +struct arg_data { + // args_[0].named_args points to named_args_ to avoid bloating format_args. + // +1 to workaround a bug in gcc 7.5 that causes duplicated-branches warning. + T args_[1 + (NUM_ARGS != 0 ? NUM_ARGS : +1)]; + named_arg_info named_args_[NUM_NAMED_ARGS]; + + template + arg_data(const U&... init) : args_{T(named_args_, NUM_NAMED_ARGS), init...} {} + arg_data(const arg_data& other) = delete; + const T* args() const { return args_ + 1; } + named_arg_info* named_args() { return named_args_; } +}; + +template +struct arg_data { + // +1 to workaround a bug in gcc 7.5 that causes duplicated-branches warning. + T args_[NUM_ARGS != 0 ? NUM_ARGS : +1]; + + template + FMT_INLINE arg_data(const U&... init) : args_{init...} {} + FMT_INLINE const T* args() const { return args_; } + FMT_INLINE std::nullptr_t named_args() { return nullptr; } +}; + +template +inline void init_named_args(named_arg_info*, int, int) {} + +template +void init_named_args(named_arg_info* named_args, int arg_count, + int named_arg_count, const T&, const Tail&... args) { + init_named_args(named_args, arg_count + 1, named_arg_count, args...); +} + +template +void init_named_args(named_arg_info* named_args, int arg_count, + int named_arg_count, const named_arg& arg, + const Tail&... args) { + named_args[named_arg_count++] = {arg.name, arg_count}; + init_named_args(named_args, arg_count + 1, named_arg_count, args...); +} + +template +FMT_INLINE void init_named_args(std::nullptr_t, int, int, const Args&...) {} + +template struct is_named_arg : std::false_type {}; + +template +struct is_named_arg> : std::true_type {}; + +template constexpr size_t count() { return B ? 1 : 0; } +template constexpr size_t count() { + return (B1 ? 1 : 0) + count(); +} + +template constexpr size_t count_named_args() { + return count::value...>(); +} + +enum class type { + none_type, + // Integer types should go first, + int_type, + uint_type, + long_long_type, + ulong_long_type, + int128_type, + uint128_type, + bool_type, + char_type, + last_integer_type = char_type, + // followed by floating-point types. + float_type, + double_type, + long_double_type, + last_numeric_type = long_double_type, + cstring_type, + string_type, + pointer_type, + custom_type +}; + +// Maps core type T to the corresponding type enum constant. +template +struct type_constant : std::integral_constant {}; + +#define FMT_TYPE_CONSTANT(Type, constant) \ + template \ + struct type_constant \ + : std::integral_constant {} + +FMT_TYPE_CONSTANT(int, int_type); +FMT_TYPE_CONSTANT(unsigned, uint_type); +FMT_TYPE_CONSTANT(long long, long_long_type); +FMT_TYPE_CONSTANT(unsigned long long, ulong_long_type); +FMT_TYPE_CONSTANT(int128_t, int128_type); +FMT_TYPE_CONSTANT(uint128_t, uint128_type); +FMT_TYPE_CONSTANT(bool, bool_type); +FMT_TYPE_CONSTANT(Char, char_type); +FMT_TYPE_CONSTANT(float, float_type); +FMT_TYPE_CONSTANT(double, double_type); +FMT_TYPE_CONSTANT(long double, long_double_type); +FMT_TYPE_CONSTANT(const Char*, cstring_type); +FMT_TYPE_CONSTANT(basic_string_view, string_type); +FMT_TYPE_CONSTANT(const void*, pointer_type); + +constexpr bool is_integral_type(type t) { + return t > type::none_type && t <= type::last_integer_type; +} + +constexpr bool is_arithmetic_type(type t) { + return t > type::none_type && t <= type::last_numeric_type; +} + +template struct string_value { + const Char* data; + size_t size; +}; + +template struct named_arg_value { + const named_arg_info* data; + size_t size; +}; + +template struct custom_value { + using parse_context = typename Context::parse_context_type; + const void* value; + void (*format)(const void* arg, parse_context& parse_ctx, Context& ctx); +}; + +// A formatting argument value. +template class value { + public: + using char_type = typename Context::char_type; + + union { + int int_value; + unsigned uint_value; + long long long_long_value; + unsigned long long ulong_long_value; + int128_t int128_value; + uint128_t uint128_value; + bool bool_value; + char_type char_value; + float float_value; + double double_value; + long double long_double_value; + const void* pointer; + string_value string; + custom_value custom; + named_arg_value named_args; + }; + + constexpr FMT_INLINE value(int val = 0) : int_value(val) {} + constexpr FMT_INLINE value(unsigned val) : uint_value(val) {} + FMT_INLINE value(long long val) : long_long_value(val) {} + FMT_INLINE value(unsigned long long val) : ulong_long_value(val) {} + FMT_INLINE value(int128_t val) : int128_value(val) {} + FMT_INLINE value(uint128_t val) : uint128_value(val) {} + FMT_INLINE value(float val) : float_value(val) {} + FMT_INLINE value(double val) : double_value(val) {} + FMT_INLINE value(long double val) : long_double_value(val) {} + FMT_INLINE value(bool val) : bool_value(val) {} + FMT_INLINE value(char_type val) : char_value(val) {} + FMT_INLINE value(const char_type* val) { string.data = val; } + FMT_INLINE value(basic_string_view val) { + string.data = val.data(); + string.size = val.size(); + } + FMT_INLINE value(const void* val) : pointer(val) {} + FMT_INLINE value(const named_arg_info* args, size_t size) + : named_args{args, size} {} + + template FMT_INLINE value(const T& val) { + custom.value = &val; + // Get the formatter type through the context to allow different contexts + // have different extension points, e.g. `formatter` for `format` and + // `printf_formatter` for `printf`. + custom.format = format_custom_arg< + T, conditional_t::value, + typename Context::template formatter_type, + fallback_formatter>>; + } + + private: + // Formats an argument of a custom type, such as a user-defined class. + template + static void format_custom_arg(const void* arg, + typename Context::parse_context_type& parse_ctx, + Context& ctx) { + Formatter f; + parse_ctx.advance_to(f.parse(parse_ctx)); + ctx.advance_to(f.format(*static_cast(arg), ctx)); + } +}; + +template +FMT_CONSTEXPR basic_format_arg make_arg(const T& value); + +// To minimize the number of types we need to deal with, long is translated +// either to int or to long long depending on its size. +enum { long_short = sizeof(long) == sizeof(int) }; +using long_type = conditional_t; +using ulong_type = conditional_t; + +struct unformattable {}; + +// Maps formatting arguments to core types. +template struct arg_mapper { + using char_type = typename Context::char_type; + + FMT_CONSTEXPR int map(signed char val) { return val; } + FMT_CONSTEXPR unsigned map(unsigned char val) { return val; } + FMT_CONSTEXPR int map(short val) { return val; } + FMT_CONSTEXPR unsigned map(unsigned short val) { return val; } + FMT_CONSTEXPR int map(int val) { return val; } + FMT_CONSTEXPR unsigned map(unsigned val) { return val; } + FMT_CONSTEXPR long_type map(long val) { return val; } + FMT_CONSTEXPR ulong_type map(unsigned long val) { return val; } + FMT_CONSTEXPR long long map(long long val) { return val; } + FMT_CONSTEXPR unsigned long long map(unsigned long long val) { return val; } + FMT_CONSTEXPR int128_t map(int128_t val) { return val; } + FMT_CONSTEXPR uint128_t map(uint128_t val) { return val; } + FMT_CONSTEXPR bool map(bool val) { return val; } + + template ::value)> + FMT_CONSTEXPR char_type map(T val) { + static_assert( + std::is_same::value || std::is_same::value, + "mixing character types is disallowed"); + return val; + } + + FMT_CONSTEXPR float map(float val) { return val; } + FMT_CONSTEXPR double map(double val) { return val; } + FMT_CONSTEXPR long double map(long double val) { return val; } + + FMT_CONSTEXPR const char_type* map(char_type* val) { return val; } + FMT_CONSTEXPR const char_type* map(const char_type* val) { return val; } + template ::value)> + FMT_CONSTEXPR basic_string_view map(const T& val) { + static_assert(std::is_same>::value, + "mixing character types is disallowed"); + return to_string_view(val); + } + template , T>::value && + !is_string::value && !has_formatter::value && + !has_fallback_formatter::value)> + FMT_CONSTEXPR basic_string_view map(const T& val) { + return basic_string_view(val); + } + template < + typename T, + FMT_ENABLE_IF( + std::is_constructible, T>::value && + !std::is_constructible, T>::value && + !is_string::value && !has_formatter::value && + !has_fallback_formatter::value)> + FMT_CONSTEXPR basic_string_view map(const T& val) { + return std_string_view(val); + } + FMT_CONSTEXPR const char* map(const signed char* val) { + static_assert(std::is_same::value, "invalid string type"); + return reinterpret_cast(val); + } + FMT_CONSTEXPR const char* map(const unsigned char* val) { + static_assert(std::is_same::value, "invalid string type"); + return reinterpret_cast(val); + } + FMT_CONSTEXPR const char* map(signed char* val) { + const auto* const_val = val; + return map(const_val); + } + FMT_CONSTEXPR const char* map(unsigned char* val) { + const auto* const_val = val; + return map(const_val); + } + + FMT_CONSTEXPR const void* map(void* val) { return val; } + FMT_CONSTEXPR const void* map(const void* val) { return val; } + FMT_CONSTEXPR const void* map(std::nullptr_t val) { return val; } + template FMT_CONSTEXPR int map(const T*) { + // Formatting of arbitrary pointers is disallowed. If you want to output + // a pointer cast it to "void *" or "const void *". In particular, this + // forbids formatting of "[const] volatile char *" which is printed as bool + // by iostreams. + static_assert(!sizeof(T), "formatting of non-void pointers is disallowed"); + return 0; + } + + template ::value && + !has_formatter::value && + !has_fallback_formatter::value)> + FMT_CONSTEXPR auto map(const T& val) + -> decltype(std::declval().map( + static_cast::type>(val))) { + return map(static_cast::type>(val)); + } + template ::value && !is_char::value && + (has_formatter::value || + has_fallback_formatter::value))> + FMT_CONSTEXPR const T& map(const T& val) { + return val; + } + + template + FMT_CONSTEXPR auto map(const named_arg& val) + -> decltype(std::declval().map(val.value)) { + return map(val.value); + } + + unformattable map(...) { return {}; } +}; + +// A type constant after applying arg_mapper. +template +using mapped_type_constant = + type_constant().map(std::declval())), + typename Context::char_type>; + +enum { packed_arg_bits = 4 }; +// Maximum number of arguments with packed types. +enum { max_packed_args = 62 / packed_arg_bits }; +enum : unsigned long long { is_unpacked_bit = 1ULL << 63 }; +enum : unsigned long long { has_named_args_bit = 1ULL << 62 }; +} // namespace detail + +// A formatting argument. It is a trivially copyable/constructible type to +// allow storage in basic_memory_buffer. +template class basic_format_arg { + private: + detail::value value_; + detail::type type_; + + template + friend FMT_CONSTEXPR basic_format_arg detail::make_arg( + const T& value); + + template + friend FMT_CONSTEXPR auto visit_format_arg(Visitor&& vis, + const basic_format_arg& arg) + -> decltype(vis(0)); + + friend class basic_format_args; + friend class dynamic_format_arg_store; + + using char_type = typename Context::char_type; + + template + friend struct detail::arg_data; + + basic_format_arg(const detail::named_arg_info* args, size_t size) + : value_(args, size) {} + + public: + class handle { + public: + explicit handle(detail::custom_value custom) : custom_(custom) {} + + void format(typename Context::parse_context_type& parse_ctx, + Context& ctx) const { + custom_.format(custom_.value, parse_ctx, ctx); + } + + private: + detail::custom_value custom_; + }; + + constexpr basic_format_arg() : type_(detail::type::none_type) {} + + constexpr explicit operator bool() const FMT_NOEXCEPT { + return type_ != detail::type::none_type; + } + + detail::type type() const { return type_; } + + bool is_integral() const { return detail::is_integral_type(type_); } + bool is_arithmetic() const { return detail::is_arithmetic_type(type_); } +}; + +/** + \rst + Visits an argument dispatching to the appropriate visit method based on + the argument type. For example, if the argument type is ``double`` then + ``vis(value)`` will be called with the value of type ``double``. + \endrst + */ +template +FMT_CONSTEXPR_DECL FMT_INLINE auto visit_format_arg( + Visitor&& vis, const basic_format_arg& arg) -> decltype(vis(0)) { + using char_type = typename Context::char_type; + switch (arg.type_) { + case detail::type::none_type: + break; + case detail::type::int_type: + return vis(arg.value_.int_value); + case detail::type::uint_type: + return vis(arg.value_.uint_value); + case detail::type::long_long_type: + return vis(arg.value_.long_long_value); + case detail::type::ulong_long_type: + return vis(arg.value_.ulong_long_value); +#if FMT_USE_INT128 + case detail::type::int128_type: + return vis(arg.value_.int128_value); + case detail::type::uint128_type: + return vis(arg.value_.uint128_value); +#else + case detail::type::int128_type: + case detail::type::uint128_type: + break; +#endif + case detail::type::bool_type: + return vis(arg.value_.bool_value); + case detail::type::char_type: + return vis(arg.value_.char_value); + case detail::type::float_type: + return vis(arg.value_.float_value); + case detail::type::double_type: + return vis(arg.value_.double_value); + case detail::type::long_double_type: + return vis(arg.value_.long_double_value); + case detail::type::cstring_type: + return vis(arg.value_.string.data); + case detail::type::string_type: + return vis(basic_string_view(arg.value_.string.data, + arg.value_.string.size)); + case detail::type::pointer_type: + return vis(arg.value_.pointer); + case detail::type::custom_type: + return vis(typename basic_format_arg::handle(arg.value_.custom)); + } + return vis(monostate()); +} + +template struct formattable : std::false_type {}; + +namespace detail { + +// A workaround for gcc 4.8 to make void_t work in a SFINAE context. +template struct void_t_impl { using type = void; }; +template +using void_t = typename detail::void_t_impl::type; + +template +struct is_output_iterator : std::false_type {}; + +template +struct is_output_iterator< + It, T, + void_t::iterator_category, + decltype(*std::declval() = std::declval())>> + : std::true_type {}; + +template +struct is_back_insert_iterator : std::false_type {}; +template +struct is_back_insert_iterator> + : std::true_type {}; + +template +struct is_contiguous_back_insert_iterator : std::false_type {}; +template +struct is_contiguous_back_insert_iterator> + : is_contiguous {}; +template +struct is_contiguous_back_insert_iterator> + : std::true_type {}; + +// A type-erased reference to an std::locale to avoid heavy include. +class locale_ref { + private: + const void* locale_; // A type-erased pointer to std::locale. + + public: + locale_ref() : locale_(nullptr) {} + template explicit locale_ref(const Locale& loc); + + explicit operator bool() const FMT_NOEXCEPT { return locale_ != nullptr; } + + template Locale get() const; +}; + +template constexpr unsigned long long encode_types() { return 0; } + +template +constexpr unsigned long long encode_types() { + return static_cast(mapped_type_constant::value) | + (encode_types() << packed_arg_bits); +} + +template +FMT_CONSTEXPR basic_format_arg make_arg(const T& value) { + basic_format_arg arg; + arg.type_ = mapped_type_constant::value; + arg.value_ = arg_mapper().map(value); + return arg; +} + +template int check(unformattable) { + static_assert( + formattable(), + "Cannot format an argument. To make type T formattable provide a " + "formatter specialization: https://fmt.dev/latest/api.html#udt"); + return 0; +} +template inline const U& check(const U& val) { + return val; +} + +// The type template parameter is there to avoid an ODR violation when using +// a fallback formatter in one translation unit and an implicit conversion in +// another (not recommended). +template +inline value make_arg(const T& val) { + return check(arg_mapper().map(val)); +} + +template +inline basic_format_arg make_arg(const T& value) { + return make_arg(value); +} + +template struct is_reference_wrapper : std::false_type {}; +template +struct is_reference_wrapper> : std::true_type {}; + +template const T& unwrap(const T& v) { return v; } +template const T& unwrap(const std::reference_wrapper& v) { + return static_cast(v); +} + +class dynamic_arg_list { + // Workaround for clang's -Wweak-vtables. Unlike for regular classes, for + // templates it doesn't complain about inability to deduce single translation + // unit for placing vtable. So storage_node_base is made a fake template. + template struct node { + virtual ~node() = default; + std::unique_ptr> next; + }; + + template struct typed_node : node<> { + T value; + + template + FMT_CONSTEXPR typed_node(const Arg& arg) : value(arg) {} + + template + FMT_CONSTEXPR typed_node(const basic_string_view& arg) + : value(arg.data(), arg.size()) {} + }; + + std::unique_ptr> head_; + + public: + template const T& push(const Arg& arg) { + auto new_node = std::unique_ptr>(new typed_node(arg)); + auto& value = new_node->value; + new_node->next = std::move(head_); + head_ = std::move(new_node); + return value; + } +}; +} // namespace detail + +// Formatting context. +template class basic_format_context { + public: + /** The character type for the output. */ + using char_type = Char; + + private: + OutputIt out_; + basic_format_args args_; + detail::locale_ref loc_; + + public: + using iterator = OutputIt; + using format_arg = basic_format_arg; + using parse_context_type = basic_format_parse_context; + template using formatter_type = formatter; + + basic_format_context(const basic_format_context&) = delete; + void operator=(const basic_format_context&) = delete; + /** + Constructs a ``basic_format_context`` object. References to the arguments are + stored in the object so make sure they have appropriate lifetimes. + */ + basic_format_context(OutputIt out, + basic_format_args ctx_args, + detail::locale_ref loc = detail::locale_ref()) + : out_(out), args_(ctx_args), loc_(loc) {} + + format_arg arg(int id) const { return args_.get(id); } + format_arg arg(basic_string_view name) { return args_.get(name); } + int arg_id(basic_string_view name) { return args_.get_id(name); } + const basic_format_args& args() const { return args_; } + + detail::error_handler error_handler() { return {}; } + void on_error(const char* message) { error_handler().on_error(message); } + + // Returns an iterator to the beginning of the output range. + iterator out() { return out_; } + + // Advances the begin iterator to ``it``. + void advance_to(iterator it) { + if (!detail::is_back_insert_iterator()) out_ = it; + } + + detail::locale_ref locale() { return loc_; } +}; + +template +using buffer_context = + basic_format_context, Char>; +using format_context = buffer_context; +using wformat_context = buffer_context; + +// Workaround an alias issue: https://stackoverflow.com/q/62767544/471164. +#define FMT_BUFFER_CONTEXT(Char) \ + basic_format_context, Char> + +/** + \rst + An array of references to arguments. It can be implicitly converted into + `~fmt::basic_format_args` for passing into type-erased formatting functions + such as `~fmt::vformat`. + \endrst + */ +template +class format_arg_store +#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409 + // Workaround a GCC template argument substitution bug. + : public basic_format_args +#endif +{ + private: + static const size_t num_args = sizeof...(Args); + static const size_t num_named_args = detail::count_named_args(); + static const bool is_packed = num_args <= detail::max_packed_args; + + using value_type = conditional_t, + basic_format_arg>; + + detail::arg_data + data_; + + friend class basic_format_args; + + static constexpr unsigned long long desc = + (is_packed ? detail::encode_types() + : detail::is_unpacked_bit | num_args) | + (num_named_args != 0 + ? static_cast(detail::has_named_args_bit) + : 0); + + public: + format_arg_store(const Args&... args) + : +#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409 + basic_format_args(*this), +#endif + data_{detail::make_arg< + is_packed, Context, + detail::mapped_type_constant::value>(args)...} { + detail::init_named_args(data_.named_args(), 0, 0, args...); + } +}; + +/** + \rst + Constructs a `~fmt::format_arg_store` object that contains references to + arguments and can be implicitly converted to `~fmt::format_args`. `Context` + can be omitted in which case it defaults to `~fmt::context`. + See `~fmt::arg` for lifetime considerations. + \endrst + */ +template +inline format_arg_store make_format_args( + const Args&... args) { + return {args...}; +} + +/** + \rst + Constructs a `~fmt::format_arg_store` object that contains references + to arguments and can be implicitly converted to `~fmt::format_args`. + If ``format_str`` is a compile-time string then `make_args_checked` checks + its validity at compile time. + \endrst + */ +template > +inline auto make_args_checked(const S& format_str, + const remove_reference_t&... args) + -> format_arg_store, remove_reference_t...> { + static_assert( + detail::count<( + std::is_base_of>::value && + std::is_reference::value)...>() == 0, + "passing views as lvalues is disallowed"); + detail::check_format_string(format_str); + return {args...}; +} + +/** + \rst + Returns a named argument to be used in a formatting function. It should only + be used in a call to a formatting function. + + **Example**:: + + fmt::print("Elapsed time: {s:.2f} seconds", fmt::arg("s", 1.23)); + \endrst + */ +template +inline detail::named_arg arg(const Char* name, const T& arg) { + static_assert(!detail::is_named_arg(), "nested named arguments"); + return {name, arg}; +} + +/** + \rst + A dynamic version of `fmt::format_arg_store`. + It's equipped with a storage to potentially temporary objects which lifetimes + could be shorter than the format arguments object. + + It can be implicitly converted into `~fmt::basic_format_args` for passing + into type-erased formatting functions such as `~fmt::vformat`. + \endrst + */ +template +class dynamic_format_arg_store +#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409 + // Workaround a GCC template argument substitution bug. + : public basic_format_args +#endif +{ + private: + using char_type = typename Context::char_type; + + template struct need_copy { + static constexpr detail::type mapped_type = + detail::mapped_type_constant::value; + + enum { + value = !(detail::is_reference_wrapper::value || + std::is_same>::value || + std::is_same>::value || + (mapped_type != detail::type::cstring_type && + mapped_type != detail::type::string_type && + mapped_type != detail::type::custom_type)) + }; + }; + + template + using stored_type = conditional_t::value, + std::basic_string, T>; + + // Storage of basic_format_arg must be contiguous. + std::vector> data_; + std::vector> named_info_; + + // Storage of arguments not fitting into basic_format_arg must grow + // without relocation because items in data_ refer to it. + detail::dynamic_arg_list dynamic_args_; + + friend class basic_format_args; + + unsigned long long get_types() const { + return detail::is_unpacked_bit | data_.size() | + (named_info_.empty() + ? 0ULL + : static_cast(detail::has_named_args_bit)); + } + + const basic_format_arg* data() const { + return named_info_.empty() ? data_.data() : data_.data() + 1; + } + + template void emplace_arg(const T& arg) { + data_.emplace_back(detail::make_arg(arg)); + } + + template + void emplace_arg(const detail::named_arg& arg) { + if (named_info_.empty()) { + constexpr const detail::named_arg_info* zero_ptr{nullptr}; + data_.insert(data_.begin(), {zero_ptr, 0}); + } + data_.emplace_back(detail::make_arg(detail::unwrap(arg.value))); + auto pop_one = [](std::vector>* data) { + data->pop_back(); + }; + std::unique_ptr>, decltype(pop_one)> + guard{&data_, pop_one}; + named_info_.push_back({arg.name, static_cast(data_.size() - 2u)}); + data_[0].value_.named_args = {named_info_.data(), named_info_.size()}; + guard.release(); + } + + public: + /** + \rst + Adds an argument into the dynamic store for later passing to a formatting + function. + + Note that custom types and string types (but not string views) are copied + into the store dynamically allocating memory if necessary. + + **Example**:: + + fmt::dynamic_format_arg_store store; + store.push_back(42); + store.push_back("abc"); + store.push_back(1.5f); + std::string result = fmt::vformat("{} and {} and {}", store); + \endrst + */ + template void push_back(const T& arg) { + if (detail::const_check(need_copy::value)) + emplace_arg(dynamic_args_.push>(arg)); + else + emplace_arg(detail::unwrap(arg)); + } + + /** + \rst + Adds a reference to the argument into the dynamic store for later passing to + a formatting function. Supports named arguments wrapped in + ``std::reference_wrapper`` via ``std::ref()``/``std::cref()``. + + **Example**:: + + fmt::dynamic_format_arg_store store; + char str[] = "1234567890"; + store.push_back(std::cref(str)); + int a1_val{42}; + auto a1 = fmt::arg("a1_", a1_val); + store.push_back(std::cref(a1)); + + // Changing str affects the output but only for string and custom types. + str[0] = 'X'; + + std::string result = fmt::vformat("{} and {a1_}"); + assert(result == "X234567890 and 42"); + \endrst + */ + template void push_back(std::reference_wrapper arg) { + static_assert( + detail::is_named_arg::type>::value || + need_copy::value, + "objects of built-in types and string views are always copied"); + emplace_arg(arg.get()); + } + + /** + Adds named argument into the dynamic store for later passing to a formatting + function. ``std::reference_wrapper`` is supported to avoid copying of the + argument. + */ + template + void push_back(const detail::named_arg& arg) { + const char_type* arg_name = + dynamic_args_.push>(arg.name).c_str(); + if (detail::const_check(need_copy::value)) { + emplace_arg( + fmt::arg(arg_name, dynamic_args_.push>(arg.value))); + } else { + emplace_arg(fmt::arg(arg_name, arg.value)); + } + } + + /** Erase all elements from the store */ + void clear() { + data_.clear(); + named_info_.clear(); + dynamic_args_ = detail::dynamic_arg_list(); + } + + /** + \rst + Reserves space to store at least *new_cap* arguments including + *new_cap_named* named arguments. + \endrst + */ + void reserve(size_t new_cap, size_t new_cap_named) { + FMT_ASSERT(new_cap >= new_cap_named, + "Set of arguments includes set of named arguments"); + data_.reserve(new_cap); + named_info_.reserve(new_cap_named); + } +}; + +/** + \rst + A view of a collection of formatting arguments. To avoid lifetime issues it + should only be used as a parameter type in type-erased functions such as + ``vformat``:: + + void vlog(string_view format_str, format_args args); // OK + format_args args = make_format_args(42); // Error: dangling reference + \endrst + */ +template class basic_format_args { + public: + using size_type = int; + using format_arg = basic_format_arg; + + private: + // A descriptor that contains information about formatting arguments. + // If the number of arguments is less or equal to max_packed_args then + // argument types are passed in the descriptor. This reduces binary code size + // per formatting function call. + unsigned long long desc_; + union { + // If is_packed() returns true then argument values are stored in values_; + // otherwise they are stored in args_. This is done to improve cache + // locality and reduce compiled code size since storing larger objects + // may require more code (at least on x86-64) even if the same amount of + // data is actually copied to stack. It saves ~10% on the bloat test. + const detail::value* values_; + const format_arg* args_; + }; + + bool is_packed() const { return (desc_ & detail::is_unpacked_bit) == 0; } + bool has_named_args() const { + return (desc_ & detail::has_named_args_bit) != 0; + } + + detail::type type(int index) const { + int shift = index * detail::packed_arg_bits; + unsigned int mask = (1 << detail::packed_arg_bits) - 1; + return static_cast((desc_ >> shift) & mask); + } + + basic_format_args(unsigned long long desc, + const detail::value* values) + : desc_(desc), values_(values) {} + basic_format_args(unsigned long long desc, const format_arg* args) + : desc_(desc), args_(args) {} + + public: + basic_format_args() : desc_(0) {} + + /** + \rst + Constructs a `basic_format_args` object from `~fmt::format_arg_store`. + \endrst + */ + template + FMT_INLINE basic_format_args(const format_arg_store& store) + : basic_format_args(store.desc, store.data_.args()) {} + + /** + \rst + Constructs a `basic_format_args` object from + `~fmt::dynamic_format_arg_store`. + \endrst + */ + FMT_INLINE basic_format_args(const dynamic_format_arg_store& store) + : basic_format_args(store.get_types(), store.data()) {} + + /** + \rst + Constructs a `basic_format_args` object from a dynamic set of arguments. + \endrst + */ + basic_format_args(const format_arg* args, int count) + : basic_format_args(detail::is_unpacked_bit | detail::to_unsigned(count), + args) {} + + /** Returns the argument with the specified id. */ + format_arg get(int id) const { + format_arg arg; + if (!is_packed()) { + if (id < max_size()) arg = args_[id]; + return arg; + } + if (id >= detail::max_packed_args) return arg; + arg.type_ = type(id); + if (arg.type_ == detail::type::none_type) return arg; + arg.value_ = values_[id]; + return arg; + } + + template format_arg get(basic_string_view name) const { + int id = get_id(name); + return id >= 0 ? get(id) : format_arg(); + } + + template int get_id(basic_string_view name) const { + if (!has_named_args()) return -1; + const auto& named_args = + (is_packed() ? values_[-1] : args_[-1].value_).named_args; + for (size_t i = 0; i < named_args.size; ++i) { + if (named_args.data[i].name == name) return named_args.data[i].id; + } + return -1; + } + + int max_size() const { + unsigned long long max_packed = detail::max_packed_args; + return static_cast(is_packed() ? max_packed + : desc_ & ~detail::is_unpacked_bit); + } +}; + +#ifdef FMT_ARM_ABI_COMPATIBILITY +/** An alias to ``basic_format_args``. */ +// Separate types would result in shorter symbols but break ABI compatibility +// between clang and gcc on ARM (#1919). +using format_args = basic_format_args; +using wformat_args = basic_format_args; +#else +// DEPRECATED! These are kept for ABI compatibility. +// It is a separate type rather than an alias to make symbols readable. +struct format_args : basic_format_args { + template + FMT_INLINE format_args(const Args&... args) : basic_format_args(args...) {} +}; +struct wformat_args : basic_format_args { + using basic_format_args::basic_format_args; +}; +#endif + +namespace detail { + +template ::value)> +std::basic_string vformat( + basic_string_view format_str, + basic_format_args>> args); + +FMT_API std::string vformat(string_view format_str, format_args args); + +template +void vformat_to( + buffer& buf, basic_string_view format_str, + basic_format_args)> args, + detail::locale_ref loc = {}); + +template ::value)> +inline void vprint_mojibake(std::FILE*, basic_string_view, const Args&) {} + +FMT_API void vprint_mojibake(std::FILE*, string_view, format_args); +#ifndef _WIN32 +inline void vprint_mojibake(std::FILE*, string_view, format_args) {} +#endif +} // namespace detail + +/** Formats a string and writes the output to ``out``. */ +// GCC 8 and earlier cannot handle std::back_insert_iterator with +// vformat_to(...) overload, so SFINAE on iterator type instead. +template , + bool enable = detail::is_output_iterator::value> +auto vformat_to(OutputIt out, const S& format_str, + basic_format_args>> args) + -> typename std::enable_if::type { + decltype(detail::get_buffer(out)) buf(detail::get_buffer_init(out)); + detail::vformat_to(buf, to_string_view(format_str), args); + return detail::get_iterator(buf); +} + +/** + \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 out; + fmt::format_to(std::back_inserter(out), "{}", 42); + \endrst + */ +// We cannot use FMT_ENABLE_IF because of a bug in gcc 8.3. +template >::value> +inline auto format_to(OutputIt out, const S& format_str, Args&&... args) -> + typename std::enable_if::type { + const auto& vargs = fmt::make_args_checked(format_str, args...); + return vformat_to(out, to_string_view(format_str), vargs); +} + +template struct format_to_n_result { + /** Iterator past the end of the output range. */ + OutputIt out; + /** Total (not truncated) output size. */ + size_t size; +}; + +template ::value)> +inline format_to_n_result vformat_to_n( + OutputIt out, size_t n, basic_string_view format_str, + basic_format_args>> args) { + detail::iterator_buffer buf(out, + n); + detail::vformat_to(buf, format_str, args); + return {buf.out(), buf.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 >::value> +inline auto format_to_n(OutputIt out, size_t n, const S& format_str, + const Args&... args) -> + typename std::enable_if>::type { + const auto& vargs = fmt::make_args_checked(format_str, args...); + return vformat_to_n(out, n, to_string_view(format_str), vargs); +} + +/** + Returns the number of characters in the output of + ``format(format_str, args...)``. + */ +template +inline size_t formatted_size(string_view format_str, Args&&... args) { + const auto& vargs = fmt::make_args_checked(format_str, args...); + detail::counting_buffer<> buf; + detail::vformat_to(buf, format_str, vargs); + return buf.count(); +} + +template > +FMT_INLINE std::basic_string vformat( + const S& format_str, + basic_format_args>> args) { + return detail::vformat(to_string_view(format_str), args); +} + +/** + \rst + Formats arguments and returns the result as a string. + + **Example**:: + + #include + std::string message = fmt::format("The answer is {}", 42); + \endrst +*/ +// Pass char_t as a default template parameter instead of using +// std::basic_string> to reduce the symbol size. +template > +FMT_INLINE std::basic_string format(const S& format_str, Args&&... args) { + const auto& vargs = fmt::make_args_checked(format_str, args...); + return detail::vformat(to_string_view(format_str), vargs); +} + +FMT_API void vprint(string_view, format_args); +FMT_API void vprint(std::FILE*, string_view, format_args); + +/** + \rst + Formats ``args`` according to specifications in ``format_str`` and writes the + output to the file ``f``. Strings are assumed to be Unicode-encoded unless the + ``FMT_UNICODE`` macro is set to 0. + + **Example**:: + + fmt::print(stderr, "Don't {}!", "panic"); + \endrst + */ +template > +inline void print(std::FILE* f, const S& format_str, Args&&... args) { + const auto& vargs = fmt::make_args_checked(format_str, args...); + return detail::is_unicode() + ? vprint(f, to_string_view(format_str), vargs) + : detail::vprint_mojibake(f, to_string_view(format_str), vargs); +} + +/** + \rst + Formats ``args`` according to specifications in ``format_str`` and writes + the output to ``stdout``. Strings are assumed to be Unicode-encoded unless + the ``FMT_UNICODE`` macro is set to 0. + + **Example**:: + + fmt::print("Elapsed time: {0:.2f} seconds", 1.23); + \endrst + */ +template > +inline void print(const S& format_str, Args&&... args) { + const auto& vargs = fmt::make_args_checked(format_str, args...); + return detail::is_unicode() + ? vprint(to_string_view(format_str), vargs) + : detail::vprint_mojibake(stdout, to_string_view(format_str), + vargs); +} +FMT_END_NAMESPACE + +#endif // FMT_CORE_H_ -- cgit v1.2.3