// Formatting library for C++ - the standard API implementation // // Copyright (c) 2012 - present, Victor Zverovich // All rights reserved. // // For the license information refer to format.h. #ifndef FMT_FORMAT_ #define FMT_FORMAT_ #include <cassert> #include <variant> #include "fmt/format.h" // This implementation verifies the correctness of the standard API proposed in // P0645 Text Formatting and is optimized for copy-pasting from the paper, not // for efficiency or readability. An efficient implementation should not use // std::variant and should store packed argument type tags separately from // values in basic_format_args for small number of arguments. namespace std { template<class T> constexpr bool Integral = is_integral_v<T>; template <class O> using iter_difference_t = ptrdiff_t; } // https://fmt.dev/Text%20Formatting.html#format.syn namespace std { // [format.error], class format_error class format_error; // [format.formatter], formatter template<class charT> class basic_format_parse_context; using format_parse_context = basic_format_parse_context<char>; using wformat_parse_context = basic_format_parse_context<wchar_t>; template<class Out, class charT> class basic_format_context; using format_context = basic_format_context< /* unspecified */ std::back_insert_iterator<fmt::internal::buffer<char>>, char>; using wformat_context = basic_format_context< /* unspecified */ std::back_insert_iterator<fmt::internal::buffer<wchar_t>>, wchar_t>; template<class T, class charT = char> struct formatter { formatter() = delete; }; // [format.arguments], arguments template<class Context> class basic_format_arg; template<class Visitor, class Context> /* see below */ auto visit_format_arg(Visitor&& vis, basic_format_arg<Context> arg); template<class Context, class... Args> struct format_arg_store; // exposition only template<class Context> class basic_format_args; using format_args = basic_format_args<format_context>; using wformat_args = basic_format_args<wformat_context>; template<class Out, class charT> using format_args_t = basic_format_args<basic_format_context<Out, charT>>; template<class Context = format_context, class... Args> format_arg_store<Context, Args...> make_format_args(const Args&... args); template<class... Args> format_arg_store<wformat_context, Args...> make_wformat_args(const Args&... args); // [format.functions], formatting functions template<class... Args> string format(string_view fmt, const Args&... args); template<class... Args> wstring format(wstring_view fmt, const Args&... args); string vformat(string_view fmt, format_args args); wstring vformat(wstring_view fmt, wformat_args args); template<class Out, class... Args> Out format_to(Out out, string_view fmt, const Args&... args); template<class Out, class... Args> Out format_to(Out out, wstring_view fmt, const Args&... args); template<class Out> Out vformat_to(Out out, string_view fmt, format_args_t<fmt::type_identity_t<Out>, char> args); template<class Out> Out vformat_to(Out out, wstring_view fmt, format_args_t<fmt::type_identity_t<Out>, wchar_t> args); template<class Out> struct format_to_n_result { Out out; iter_difference_t<Out> size; }; template<class Out, class... Args> format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n, string_view fmt, const Args&... args); template<class Out, class... Args> format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n, wstring_view fmt, const Args&... args); template<class... Args> size_t formatted_size(string_view fmt, const Args&... args); template<class... Args> size_t formatted_size(wstring_view fmt, const Args&... args); } // https://fmt.dev/Text%20Formatting.html#format.error namespace std { class format_error : public runtime_error { public: explicit format_error(const string& what_arg) : runtime_error(what_arg) {} explicit format_error(const char* what_arg) : runtime_error(what_arg) {} }; } namespace std { namespace detail { struct error_handler { // This function is intentionally not constexpr to give a compile-time error. void on_error(const char* message) { throw std::format_error(message); } }; } } // https://fmt.dev/Text%20Formatting.html#format.parse_context namespace std { template<class charT> class basic_format_parse_context { public: using char_type = charT; using const_iterator = typename basic_string_view<charT>::const_iterator; using iterator = const_iterator; private: iterator begin_; // exposition only iterator end_; // exposition only enum indexing { unknown, manual, automatic }; // exposition only indexing indexing_; // exposition only size_t next_arg_id_; // exposition only size_t num_args_; // exposition only public: explicit constexpr basic_format_parse_context(basic_string_view<charT> fmt, size_t num_args = 0) noexcept; basic_format_parse_context(const basic_format_parse_context&) = delete; basic_format_parse_context& operator=(const basic_format_parse_context&) = delete; constexpr const_iterator begin() const noexcept; constexpr const_iterator end() const noexcept; constexpr void advance_to(const_iterator it); constexpr size_t next_arg_id(); constexpr void check_arg_id(size_t id); // Implementation detail: constexpr void check_arg_id(fmt::string_view) {} detail::error_handler error_handler() const { return {}; } void on_error(const char* msg) { error_handler().on_error(msg); } }; } namespace std { template<class charT> /* explicit */ constexpr basic_format_parse_context<charT>:: basic_format_parse_context(basic_string_view<charT> fmt, size_t num_args) noexcept : begin_(fmt.begin()), end_(fmt.end()), indexing_(unknown), next_arg_id_(0), num_args_(num_args) {} template<class charT> constexpr typename basic_format_parse_context<charT>::const_iterator basic_format_parse_context<charT>::begin() const noexcept { return begin_; } template<class charT> constexpr typename basic_format_parse_context<charT>::const_iterator basic_format_parse_context<charT>::end() const noexcept { return end_; } template<class charT> constexpr void basic_format_parse_context<charT>::advance_to(typename basic_format_parse_context<charT>::iterator it) { begin_ = it; } template<class charT> constexpr size_t basic_format_parse_context<charT>::next_arg_id() { if (indexing_ == manual) throw format_error("manual to automatic indexing"); if (indexing_ == unknown) indexing_ = automatic; return next_arg_id_++; } template<class charT> constexpr void basic_format_parse_context<charT>::check_arg_id(size_t id) { // clang doesn't support __builtin_is_constant_evaluated yet //if (!(!__builtin_is_constant_evaluated() || id < num_args_)) // throw format_error(invalid index is out of range"); if (indexing_ == automatic) throw format_error("automatic to manual indexing"); if (indexing_ == unknown) indexing_ = manual; } } // https://fmt.dev/Text%20Formatting.html#format.context namespace std { template<class Out, class charT> class basic_format_context { basic_format_args<basic_format_context> args_; // exposition only Out out_; // exposition only public: using iterator = Out; using char_type = charT; template<class T> using formatter_type = formatter<T, charT>; basic_format_arg<basic_format_context> arg(size_t id) const; iterator out(); void advance_to(iterator it); // Implementation details: using format_arg = basic_format_arg<basic_format_context>; basic_format_context(Out out, basic_format_args<basic_format_context> args, fmt::internal::locale_ref) : args_(args), out_(out) {} detail::error_handler error_handler() const { return {}; } basic_format_arg<basic_format_context> arg(fmt::basic_string_view<charT>) const { return {}; // unused: named arguments are not supported yet } void on_error(const char* msg) { error_handler().on_error(msg); } }; } namespace std { template<class O, class charT> basic_format_arg<basic_format_context<O, charT>> basic_format_context<O, charT>::arg(size_t id) const { return args_.get(id); } template<class O, class charT> typename basic_format_context<O, charT>::iterator basic_format_context<O, charT>::out() { return out_; } template<class O, class charT> void basic_format_context<O, charT>::advance_to(typename basic_format_context<O, charT>::iterator it) { out_ = it; } } namespace std { namespace detail { template <typename T> constexpr bool is_standard_integer_v = std::is_same_v<T, signed char> || std::is_same_v<T, short int> || std::is_same_v<T, int> || std::is_same_v<T, long int> || std::is_same_v<T, long long int>; template <typename T> constexpr bool is_standard_unsigned_integer_v = std::is_same_v<T, unsigned char> || std::is_same_v<T, unsigned short int> || std::is_same_v<T, unsigned int> || std::is_same_v<T, unsigned long int> || std::is_same_v<T, unsigned long long int>; template <typename T, typename Char> struct formatter; } } // https://fmt.dev/Text%20Formatting.html#format.arg namespace std { template<class Context> class basic_format_arg { public: class handle; private: using char_type = typename Context::char_type; // exposition only variant<monostate, bool, char_type, int, unsigned int, long long int, unsigned long long int, double, long double, const char_type*, basic_string_view<char_type>, const void*, handle> value; // exposition only template<typename T, typename = enable_if_t< std::is_same_v<T, bool> || std::is_same_v<T, char_type> || (std::is_same_v<T, char> && std::is_same_v<char_type, wchar_t>) || detail::is_standard_integer_v<T> || detail::is_standard_unsigned_integer_v<T> || sizeof(typename Context::template formatter_type<T>().format(declval<const T&>(), declval<Context&>())) != 0 >> explicit basic_format_arg(const T& v) noexcept; // exposition only explicit basic_format_arg(float n) noexcept; // exposition only explicit basic_format_arg(double n) noexcept; // exposition only explicit basic_format_arg(long double n) noexcept; // exposition only explicit basic_format_arg(const char_type* s); // exposition only template<class traits> explicit basic_format_arg( basic_string_view<char_type, traits> s) noexcept; // exposition only template<class traits, class Allocator> explicit basic_format_arg( const basic_string<char_type, traits, Allocator>& s) noexcept; // exposition only explicit basic_format_arg(nullptr_t) noexcept; // exposition only template<class T, typename = enable_if_t<is_void_v<T>>> explicit basic_format_arg(const T* p) noexcept; // exposition only // Fails due to a bug in clang //template<class Visitor, class Ctx> // friend auto visit_format_arg(Visitor&& vis, // basic_format_arg<Ctx> arg); // exposition only friend auto get_value(basic_format_arg arg) { return arg.value; } template <typename T, typename Char> friend struct detail::formatter; template<class Ctx, class... Args> friend format_arg_store<Ctx, Args...> make_format_args(const Args&... args); // exposition only public: basic_format_arg() noexcept; explicit operator bool() const noexcept; }; } namespace std { template<class Context> basic_format_arg<Context>::basic_format_arg() noexcept {} template<class Context> template<class T, typename> /* explicit */ basic_format_arg<Context>::basic_format_arg(const T& v) noexcept { if constexpr (std::is_same_v<T, bool> || std::is_same_v<T, char_type>) value = v; else if constexpr (std::is_same_v<T, char> && std::is_same_v<char_type, wchar_t>) value = static_cast<wchar_t>(v); else if constexpr (detail::is_standard_integer_v<T> && sizeof(T) <= sizeof(int)) value = static_cast<int>(v); else if constexpr (detail::is_standard_unsigned_integer_v<T> && sizeof(T) <= sizeof(unsigned)) value = static_cast<unsigned>(v); else if constexpr (detail::is_standard_integer_v<T>) value = static_cast<long long int>(v); else if constexpr (detail::is_standard_unsigned_integer_v<T>) value = static_cast<unsigned long long int>(v); else if constexpr (sizeof(typename Context::template formatter_type<T>().format(declval<const T&>(), declval<Context&>())) != 0) value = handle(v); } template<class Context> /* explicit */ basic_format_arg<Context>::basic_format_arg(float n) noexcept : value(static_cast<double>(n)) {} template<class Context> /* explicit */ basic_format_arg<Context>::basic_format_arg(double n) noexcept : value(n) {} template<class Context> /* explicit */ basic_format_arg<Context>::basic_format_arg(long double n) noexcept : value(n) {} template<class Context> /* explicit */ basic_format_arg<Context>::basic_format_arg(const typename basic_format_arg<Context>::char_type* s) : value(s) { assert(s != nullptr); } template<class Context> template<class traits> /* explicit */ basic_format_arg<Context>::basic_format_arg(basic_string_view<char_type, traits> s) noexcept : value(s) {} template<class Context> template<class traits, class Allocator> /* explicit */ basic_format_arg<Context>::basic_format_arg( const basic_string<char_type, traits, Allocator>& s) noexcept : value(basic_string_view<char_type>(s.data(), s.size())) {} template<class Context> /* explicit */ basic_format_arg<Context>::basic_format_arg(nullptr_t) noexcept : value(static_cast<const void*>(nullptr)) {} template<class Context> template<class T, typename> /* explicit */ basic_format_arg<Context>::basic_format_arg(const T* p) noexcept : value(p) {} template<class Context> /* explicit */ basic_format_arg<Context>::operator bool() const noexcept { return !holds_alternative<monostate>(value); } } namespace std { template<class Context> class basic_format_arg<Context>::handle { const void* ptr_; // exposition only void (*format_)(basic_format_parse_context<char_type>&, Context&, const void*); // exposition only template<class T> explicit handle(const T& val) noexcept; // exposition only friend class basic_format_arg<Context>; // exposition only public: void format(basic_format_parse_context<char_type>&, Context& ctx) const; }; } namespace std { template<class Context> template<class T> /* explicit */ basic_format_arg<Context>::handle::handle(const T& val) noexcept : ptr_(&val), format_([](basic_format_parse_context<char_type>& parse_ctx, Context& format_ctx, const void* ptr) { typename Context::template formatter_type<T> f; parse_ctx.advance_to(f.parse(parse_ctx)); format_ctx.advance_to(f.format(*static_cast<const T*>(ptr), format_ctx)); }) {} template<class Context> void basic_format_arg<Context>::handle::format(basic_format_parse_context<char_type>& parse_ctx, Context& format_ctx) const { format_(parse_ctx, format_ctx, ptr_); } // https://fmt.dev/Text%20Formatting.html#format.visit template<class Visitor, class Context> auto visit_format_arg(Visitor&& vis, basic_format_arg<Context> arg) { return visit(vis, get_value(arg)); } } // https://fmt.dev/Text%20Formatting.html#format.store namespace std { template<class Context, class... Args> struct format_arg_store { // exposition only array<basic_format_arg<Context>, sizeof...(Args)> args; }; } // https://fmt.dev/Text%20Formatting.html#format.basic_args namespace std { template<class Context> class basic_format_args { size_t size_; // exposition only const basic_format_arg<Context>* data_; // exposition only public: basic_format_args() noexcept; template<class... Args> basic_format_args(const format_arg_store<Context, Args...>& store) noexcept; basic_format_arg<Context> get(size_t i) const noexcept; }; } namespace std { template<class Context> basic_format_args<Context>::basic_format_args() noexcept : size_(0) {} template<class Context> template<class... Args> basic_format_args<Context>::basic_format_args(const format_arg_store<Context, Args...>& store) noexcept : size_(sizeof...(Args)), data_(store.args.data()) {} template<class Context> basic_format_arg<Context> basic_format_args<Context>::get(size_t i) const noexcept { return i < size_ ? data_[i] : basic_format_arg<Context>(); } } namespace std { // https://fmt.dev/Text%20Formatting.html#format.make_args template<class Context /*= format_context*/, class... Args> format_arg_store<Context, Args...> make_format_args(const Args&... args) { return {basic_format_arg<Context>(args)...}; } // https://fmt.dev/Text%20Formatting.html#format.make_wargs template<class... Args> format_arg_store<wformat_context, Args...> make_wformat_args(const Args&... args) { return make_format_args<wformat_context>(args...); } } namespace std { namespace detail { template <typename Range> class arg_formatter : public fmt::internal::arg_formatter_base<Range, error_handler> { private: using char_type = typename Range::value_type; using base = fmt::internal::arg_formatter_base<Range, error_handler>; using format_context = std::basic_format_context<typename base::iterator, char_type>; using parse_context = basic_format_parse_context<char_type>; parse_context* parse_ctx_; format_context& 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 */ arg_formatter(format_context& ctx, parse_context* parse_ctx = nullptr, fmt::format_specs* spec = nullptr) : base(Range(ctx.out()), spec, {}), parse_ctx_(parse_ctx), ctx_(ctx) {} using base::operator(); /** Formats an argument of a user-defined type. */ iterator operator()(typename std::basic_format_arg<format_context>::handle handle) { handle.format(*parse_ctx_, ctx_); return this->out(); } iterator operator()(monostate) { throw format_error(""); } }; template <typename Context> inline fmt::internal::type get_type(basic_format_arg<Context> arg) { return visit_format_arg([&] (auto val) { using char_type = typename Context::char_type; using T = decltype(val); if (std::is_same_v<T, monostate>) return fmt::internal::type::none_type; if (std::is_same_v<T, bool>) return fmt::internal::type::bool_type; if (std::is_same_v<T, char_type>) return fmt::internal::type::char_type; if (std::is_same_v<T, int>) return fmt::internal::type::int_type; if (std::is_same_v<T, unsigned int>) return fmt::internal::type::uint_type; if (std::is_same_v<T, long long int>) return fmt::internal::type::long_long_type; if (std::is_same_v<T, unsigned long long int>) return fmt::internal::type::ulong_long_type; if (std::is_same_v<T, double>) return fmt::internal::type::double_type; if (std::is_same_v<T, long double>) return fmt::internal::type::long_double_type; if (std::is_same_v<T, const char_type*>) return fmt::internal::type::cstring_type; if (std::is_same_v<T, basic_string_view<char_type>>) return fmt::internal::type::string_type; if (std::is_same_v<T, const void*>) return fmt::internal::type::pointer_type; assert(get_value(arg).index() == 12); return fmt::internal::type::custom_type; }, arg); } template <typename Context> class custom_formatter { private: using parse_context = basic_format_parse_context<typename Context::char_type>; parse_context& parse_ctx_; Context& format_ctx_; public: custom_formatter(parse_context& parse_ctx, Context& ctx) : parse_ctx_(parse_ctx), format_ctx_(ctx) {} bool operator()(typename basic_format_arg<Context>::handle h) const { h.format(parse_ctx_, format_ctx_); return true; } template <typename T> bool operator()(T) const { return false; } }; template <typename ArgFormatter, typename Char, typename Context> struct format_handler : detail::error_handler { typedef typename ArgFormatter::range range; format_handler(range r, basic_string_view<Char> str, basic_format_args<Context> format_args, fmt::internal::locale_ref loc) : parse_ctx(str), context(r.begin(), format_args, loc) {} void on_text(const Char* begin, const Char* end) { auto size = fmt::internal::to_unsigned(end - begin); auto out = context.out(); auto&& it = fmt::internal::reserve(out, size); it = std::copy_n(begin, size, it); context.advance_to(out); } void on_arg_id() { arg = context.arg(parse_ctx.next_arg_id()); } void on_arg_id(unsigned id) { parse_ctx.check_arg_id(id); arg = context.arg(id); } void on_arg_id(fmt::basic_string_view<Char>) {} void on_replacement_field(const Char* p) { parse_ctx.advance_to(parse_ctx.begin() + (p - &*parse_ctx.begin())); custom_formatter<Context> f(parse_ctx, context); if (!visit_format_arg(f, arg)) context.advance_to(visit_format_arg(ArgFormatter(context, &parse_ctx), arg)); } const Char* on_format_specs(const Char* begin, const Char* end) { parse_ctx.advance_to(parse_ctx.begin() + (begin - &*parse_ctx.begin())); custom_formatter<Context> f(parse_ctx, context); if (visit_format_arg(f, arg)) return &*parse_ctx.begin(); fmt::basic_format_specs<Char> specs; using fmt::internal::specs_handler; using parse_context = basic_format_parse_context<Char>; fmt::internal::specs_checker<specs_handler<parse_context, Context>> handler( specs_handler<parse_context, Context>(specs, parse_ctx, context), get_type(arg)); begin = parse_format_specs(begin, end, handler); if (begin == end || *begin != '}') on_error("missing '}' in format string"); parse_ctx.advance_to(parse_ctx.begin() + (begin - &*parse_ctx.begin())); context.advance_to(visit_format_arg(ArgFormatter(context, &parse_ctx, &specs), arg)); return begin; } basic_format_parse_context<Char> parse_ctx; Context context; basic_format_arg<Context> arg; }; template <typename T, typename Char> struct formatter { // 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) { namespace internal = fmt::internal; typedef internal::dynamic_specs_handler<ParseContext> handler_type; auto type = internal::mapped_type_constant<T, fmt::buffer_context<Char>>::value; internal::specs_checker<handler_type> handler(handler_type(specs_, ctx), type); auto it = parse_format_specs(ctx.begin(), ctx.end(), handler); auto type_spec = specs_.type; auto eh = ctx.error_handler(); switch (type) { case internal::type::none_type: case internal::type::named_arg_type: FMT_ASSERT(false, "invalid argument type"); break; case internal::type::int_type: case internal::type::uint_type: case internal::type::long_long_type: case internal::type::ulong_long_type: case internal::type::bool_type: handle_int_type_spec(type_spec, internal::int_type_checker<decltype(eh)>(eh)); break; case internal::type::char_type: handle_char_specs( &specs_, internal::char_specs_checker<decltype(eh)>(type_spec, eh)); break; case internal::type::double_type: case internal::type::long_double_type: internal::parse_float_type_spec(specs_, eh); break; case internal::type::cstring_type: internal::handle_cstring_type_spec( type_spec, internal::cstring_type_checker<decltype(eh)>(eh)); break; case internal::type::string_type: internal::check_string_type_spec(type_spec, eh); break; case internal::type::pointer_type: internal::check_pointer_type_spec(type_spec, eh); break; case internal::type::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()) { fmt::internal::handle_dynamic_spec<fmt::internal::width_checker>( specs_.width, specs_.width_ref, ctx); fmt::internal::handle_dynamic_spec<fmt::internal::precision_checker>( specs_.precision, specs_.precision_ref, ctx); using range_type = fmt::internal::output_range<typename FormatContext::iterator, typename FormatContext::char_type>; return visit_format_arg(arg_formatter<range_type>(ctx, nullptr, &specs_), basic_format_arg<FormatContext>(val)); } private: fmt::internal::dynamic_format_specs<Char> specs_; }; } // namespace detail // https://fmt.dev/Text%20Formatting.html#format.functions template<class... Args> string format(string_view fmt, const Args&... args) { return vformat(fmt, make_format_args(args...)); } template<class... Args> wstring format(wstring_view fmt, const Args&... args) { return vformat(fmt, make_wformat_args(args...)); } string vformat(string_view fmt, format_args args) { fmt::memory_buffer mbuf; fmt::internal::buffer<char>& buf = mbuf; using range = fmt::buffer_range<char>; detail::format_handler<detail::arg_formatter<range>, char, format_context> h(range(std::back_inserter(buf)), fmt, args, {}); fmt::internal::parse_format_string<false>(fmt::to_string_view(fmt), h); return to_string(mbuf); } wstring vformat(wstring_view fmt, wformat_args args); template<class Out, class... Args> Out format_to(Out out, string_view fmt, const Args&... args) { using context = basic_format_context<Out, decltype(fmt)::value_type>; return vformat_to(out, fmt, make_format_args<context>(args...)); } template<class Out, class... Args> Out format_to(Out out, wstring_view fmt, const Args&... args) { using context = basic_format_context<Out, decltype(fmt)::value_type>; return vformat_to(out, fmt, make_format_args<context>(args...)); } template<class Out> Out vformat_to(Out out, string_view fmt, format_args_t<fmt::type_identity_t<Out>, char> args) { using range = fmt::internal::output_range<Out, char>; detail::format_handler<detail::arg_formatter<range>, char, basic_format_context<Out, char>> h(range(out), fmt, args, {}); fmt::internal::parse_format_string<false>(fmt::to_string_view(fmt), h); return h.context.out(); } template<class Out> Out vformat_to(Out out, wstring_view fmt, format_args_t<fmt::type_identity_t<Out>, wchar_t> args); template<class Out, class... Args> format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n, string_view fmt, const Args&... args); template<class Out, class... Args> format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n, wstring_view fmt, const Args&... args); template<class... Args> size_t formatted_size(string_view fmt, const Args&... args); template<class... Args> size_t formatted_size(wstring_view fmt, const Args&... args); #define charT char template<> struct formatter<charT, charT> : detail::formatter<charT, charT> {}; template<> struct formatter<char, wchar_t>; template<> struct formatter<charT*, charT> : detail::formatter<const charT*, charT> {}; template<> struct formatter<const charT*, charT> : detail::formatter<const charT*, charT> {}; template<size_t N> struct formatter<const charT[N], charT> : detail::formatter<std::basic_string_view<charT>, charT> {}; template<class traits, class Allocator> struct formatter<basic_string<charT, traits, Allocator>, charT> : detail::formatter<std::basic_string_view<charT>, charT> {}; template<class traits> struct formatter<basic_string_view<charT, traits>, charT> : detail::formatter<std::basic_string_view<charT>, charT> {}; template <> struct formatter<nullptr_t, charT> : detail::formatter<const void*, charT> {}; template <> struct formatter<void*, charT> : detail::formatter<const void*, charT> {}; template <> struct formatter<const void*, charT> : detail::formatter<const void*, charT> {}; template <> struct formatter<bool, charT> : detail::formatter<bool, charT> {}; template <> struct formatter<signed char, charT> : detail::formatter<int, charT> {}; template <> struct formatter<short, charT> : detail::formatter<int, charT> {}; template <> struct formatter<int, charT> : detail::formatter<int, charT> {}; template <> struct formatter<long, charT> : detail::formatter<std::conditional_t<sizeof(long) == sizeof(int), int, long long>, charT> {}; template <> struct formatter<long long, charT> : detail::formatter<long long, charT> {}; template <> struct formatter<unsigned char, charT> : detail::formatter<unsigned int, charT> {}; template <> struct formatter<unsigned short, charT> : detail::formatter<unsigned int, charT> {}; template <> struct formatter<unsigned int, charT> : detail::formatter<unsigned int, charT> {}; template <> struct formatter<unsigned long, charT> : detail::formatter<std::conditional_t<sizeof(long) == sizeof(int), unsigned, unsigned long long>, charT> {}; template <> struct formatter<unsigned long long, charT> : detail::formatter<unsigned long long, charT> {}; template <> struct formatter<float, charT> : detail::formatter<double, charT> {}; template <> struct formatter<double, charT> : detail::formatter<double, charT> {}; template <> struct formatter<long double, charT> : detail::formatter<long double, charT> {}; #undef charT #define charT wchar_t template<> struct formatter<charT, charT> : detail::formatter<charT, charT> {}; template<> struct formatter<char, wchar_t> : detail::formatter<charT, charT> {}; template<> struct formatter<charT*, charT> : detail::formatter<const charT*, charT> {}; template<> struct formatter<const charT*, charT> : detail::formatter<const charT*, charT> {}; template<size_t N> struct formatter<const charT[N], charT> : detail::formatter<std::basic_string_view<charT>, charT> {}; template<class traits, class Allocator> struct formatter<std::basic_string<charT, traits, Allocator>, charT> : detail::formatter<std::basic_string_view<charT>, charT> {}; template<class traits> struct formatter<std::basic_string_view<charT, traits>, charT> : detail::formatter<std::basic_string_view<charT>, charT> {}; template <> struct formatter<nullptr_t, charT> : detail::formatter<const void*, charT> {}; template <> struct formatter<void*, charT> : detail::formatter<const void*, charT> {}; template <> struct formatter<const void*, charT> : detail::formatter<const void*, charT> {}; template <> struct formatter<bool, charT> : detail::formatter<bool, charT> {}; template <> struct formatter<signed char, charT> : detail::formatter<int, charT> {}; template <> struct formatter<short, charT> : detail::formatter<int, charT> {}; template <> struct formatter<int, charT> : detail::formatter<int, charT> {}; template <> struct formatter<long, charT> : detail::formatter<std::conditional_t<sizeof(long) == sizeof(int), int, long long>, charT> {}; template <> struct formatter<long long, charT> : detail::formatter<long long, charT> {}; template <> struct formatter<unsigned char, charT> : detail::formatter<unsigned int, charT> {}; template <> struct formatter<unsigned short, charT> : detail::formatter<unsigned int, charT> {}; template <> struct formatter<unsigned int, charT> : detail::formatter<unsigned int, charT> {}; template <> struct formatter<unsigned long, charT> : detail::formatter<std::conditional_t<sizeof(long) == sizeof(int), unsigned, unsigned long long>, charT> {}; template <> struct formatter<unsigned long long, charT> : detail::formatter<unsigned long long, charT> {}; template <> struct formatter<float, charT> : detail::formatter<double, charT> {}; template <> struct formatter<double, charT> : detail::formatter<double, charT> {}; template <> struct formatter<long double, charT> : detail::formatter<long double, charT> {}; #undef charT template<> struct formatter<const wchar_t, char> { formatter() = delete; }; } #endif // FMT_FORMAT_