2 //===----------------------------------------------------------------------===//
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
8 //===----------------------------------------------------------------------===//
10 #ifndef _LIBCPP_FORMAT
11 #define _LIBCPP_FORMAT
16 // [format.context], class template basic_format_context
17 template<class Out, class charT> class basic_format_context;
18 using format_context = basic_format_context<unspecified, char>;
19 using wformat_context = basic_format_context<unspecified, wchar_t>;
21 // [format.args], class template basic_format_args
22 template<class Context> class basic_format_args;
23 using format_args = basic_format_args<format_context>;
24 using wformat_args = basic_format_args<wformat_context>;
26 // [format.fmt.string], class template basic_format_string
27 template<class charT, class... Args>
28 struct basic_format_string { // since C++23, exposition only before C++23
30 basic_string_view<charT> str; // exposition only
33 template<class T> consteval basic_format_string(const T& s);
35 constexpr basic_string_view<charT> get() const noexcept { return str; }
37 template<class... Args>
38 using format_string = // since C++23, exposition only before C++23
39 basic_format_string<char, type_identity_t<Args>...>;
40 template<class... Args>
41 using wformat_string = // since C++23, exposition only before C++23
42 basic_format_string<wchar_t, type_identity_t<Args>...>;
44 // [format.functions], formatting functions
45 template<class... Args>
46 string format(format-string<Args...> fmt, Args&&... args);
47 template<class... Args>
48 wstring format(wformat-string<Args...> fmt, Args&&... args);
49 template<class... Args>
50 string format(const locale& loc, format-string<Args...> fmt, Args&&... args);
51 template<class... Args>
52 wstring format(const locale& loc, wformat-string<Args...> fmt, Args&&... args);
54 string vformat(string_view fmt, format_args args);
55 wstring vformat(wstring_view fmt, wformat_args args);
56 string vformat(const locale& loc, string_view fmt, format_args args);
57 wstring vformat(const locale& loc, wstring_view fmt, wformat_args args);
59 template<class Out, class... Args>
60 Out format_to(Out out, format-string<Args...> fmt, Args&&... args);
61 template<class Out, class... Args>
62 Out format_to(Out out, wformat-string<Args...> fmt, Args&&... args);
63 template<class Out, class... Args>
64 Out format_to(Out out, const locale& loc, format-string<Args...> fmt, Args&&... args);
65 template<class Out, class... Args>
66 Out format_to(Out out, const locale& loc, wformat-string<Args...> fmt, Args&&... args);
69 Out vformat_to(Out out, string_view fmt, format_args args);
71 Out vformat_to(Out out, wstring_view fmt, wformat_args args);
73 Out vformat_to(Out out, const locale& loc, string_view fmt,
74 format_args char> args);
76 Out vformat_to(Out out, const locale& loc, wstring_view fmt,
79 template<class Out> struct format_to_n_result {
81 iter_difference_t<Out> size;
83 template<class Out, class... Args>
84 format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n,
85 format-string<Args...> fmt, Args&&... args);
86 template<class Out, class... Args>
87 format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n,
88 wformat-string<Args...> fmt, Args&&... args);
89 template<class Out, class... Args>
90 format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n,
91 const locale& loc, format-string<Args...> fmt,
93 template<class Out, class... Args>
94 format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n,
95 const locale& loc, wformat-string<Args...> fmt,
98 template<class... Args>
99 size_t formatted_size(format-string<Args...> fmt, Args&&... args);
100 template<class... Args>
101 size_t formatted_size(wformat-string<Args...> fmt, Args&&... args);
102 template<class... Args>
103 size_t formatted_size(const locale& loc, format-string<Args...> fmt, Args&&... args);
104 template<class... Args>
105 size_t formatted_size(const locale& loc, wformat-string<Args...> fmt, Args&&... args);
107 // [format.formatter], formatter
108 template<class T, class charT = char> struct formatter;
110 // [format.parse.ctx], class template basic_format_parse_context
111 template<class charT> class basic_format_parse_context;
112 using format_parse_context = basic_format_parse_context<char>;
113 using wformat_parse_context = basic_format_parse_context<wchar_t>;
115 // [format.range], formatting of ranges
116 // [format.range.fmtkind], variable template format_kind
117 enum class range_format { // since C++23
127 constexpr unspecified format_kind = unspecified; // since C++23
129 template<ranges::input_range R>
130 requires same_as<R, remove_cvref_t<R>>
131 constexpr range_format format_kind<R> = see below; // since C++23
133 // [format.range.formatter], class template range_formatter
134 template<class T, class charT = char>
135 requires same_as<remove_cvref_t<T>, T> && formattable<T, charT>
136 class range_formatter; // since C++23
138 // [format.range.fmtdef], class template range-default-formatter
139 template<range_format K, ranges::input_range R, class charT>
140 struct range-default-formatter; // exposition only, since C++23
142 // [format.range.fmtmap], [format.range.fmtset], [format.range.fmtstr],
143 // specializations for maps, sets, and strings
144 template<ranges::input_range R, class charT>
145 requires (format_kind<R> != range_format::disabled) &&
146 formattable<ranges::range_reference_t<R>, charT>
147 struct formatter<R, charT> : range-default-formatter<format_kind<R>, R, charT> { }; // since C++23
149 // [format.arguments], arguments
150 // [format.arg], class template basic_format_arg
151 template<class Context> class basic_format_arg;
153 template<class Visitor, class Context>
154 see below visit_format_arg(Visitor&& vis, basic_format_arg<Context> arg);
156 // [format.arg.store], class template format-arg-store
157 template<class Context, class... Args> struct format-arg-store; // exposition only
159 template<class Context = format_context, class... Args>
160 format-arg-store<Context, Args...>
161 make_format_args(Args&&... args);
162 template<class... Args>
163 format-arg-store<wformat_context, Args...>
164 make_wformat_args(Args&&... args);
166 // [format.error], class format_error
172 #include <__assert> // all public C++ headers provide the assertion handler
174 #include <__format/buffer.h>
175 #include <__format/concepts.h>
176 #include <__format/container_adaptor.h>
177 #include <__format/enable_insertable.h>
178 #include <__format/format_arg.h>
179 #include <__format/format_arg_store.h>
180 #include <__format/format_args.h>
181 #include <__format/format_context.h>
182 #include <__format/format_error.h>
183 #include <__format/format_functions.h>
184 #include <__format/format_fwd.h>
185 #include <__format/format_parse_context.h>
186 #include <__format/format_string.h>
187 #include <__format/format_to_n_result.h>
188 #include <__format/formatter.h>
189 #include <__format/formatter_bool.h>
190 #include <__format/formatter_char.h>
191 #include <__format/formatter_floating_point.h>
192 #include <__format/formatter_integer.h>
193 #include <__format/formatter_pointer.h>
194 #include <__format/formatter_string.h>
195 #include <__format/formatter_tuple.h>
196 #include <__format/parser_std_format_spec.h>
197 #include <__format/range_default_formatter.h>
198 #include <__format/range_formatter.h>
199 #include <__format/unicode.h>
202 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
203 # pragma GCC system_header
206 #endif // _LIBCPP_FORMAT