1// -*- C++ -*-
2//===----------------------------------------------------------------------===//
3//
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
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef _LIBCPP_CHARCONV
11#define _LIBCPP_CHARCONV
12
13/*
14 charconv synopsis
15
16namespace std {
17
18 // floating-point format for primitive numerical conversion
19 enum class chars_format {
20 scientific = unspecified,
21 fixed = unspecified,
22 hex = unspecified,
23 general = fixed | scientific
24 };
25
26 // 23.20.2, primitive numerical output conversion
27 struct to_chars_result {
28 char* ptr;
29 errc ec;
30 friend bool operator==(const to_chars_result&, const to_chars_result&) = default; // since C++20
31 constexpr explicit operator bool() const noexcept { return ec == errc{}; } // since C++26
32 };
33
34 constexpr to_chars_result to_chars(char* first, char* last, see below value,
35 int base = 10); // constexpr since C++23
36 to_chars_result to_chars(char* first, char* last, bool value,
37 int base = 10) = delete;
38
39 to_chars_result to_chars(char* first, char* last, float value);
40 to_chars_result to_chars(char* first, char* last, double value);
41 to_chars_result to_chars(char* first, char* last, long double value);
42
43 to_chars_result to_chars(char* first, char* last, float value,
44 chars_format fmt);
45 to_chars_result to_chars(char* first, char* last, double value,
46 chars_format fmt);
47 to_chars_result to_chars(char* first, char* last, long double value,
48 chars_format fmt);
49
50 to_chars_result to_chars(char* first, char* last, float value,
51 chars_format fmt, int precision);
52 to_chars_result to_chars(char* first, char* last, double value,
53 chars_format fmt, int precision);
54 to_chars_result to_chars(char* first, char* last, long double value,
55 chars_format fmt, int precision);
56
57 // 23.20.3, primitive numerical input conversion
58 struct from_chars_result {
59 const char* ptr;
60 errc ec;
61 friend bool operator==(const from_chars_result&, const from_chars_result&) = default; // since C++20
62 constexpr explicit operator bool() const noexcept { return ec == errc{}; } // since C++26
63 };
64
65 constexpr from_chars_result from_chars(const char* first, const char* last,
66 see below& value, int base = 10); // constexpr since C++23
67
68 from_chars_result from_chars(const char* first, const char* last,
69 float& value, chars_format fmt);
70
71 from_chars_result from_chars(const char* first, const char* last,
72 double& value, chars_format fmt);
73
74} // namespace std
75
76*/
77
78#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
79# include <__cxx03/__config>
80#else
81# include <__config>
82
83# if _LIBCPP_STD_VER >= 17
84# include <__charconv/chars_format.h>
85# include <__charconv/from_chars_floating_point.h>
86# include <__charconv/from_chars_integral.h>
87# include <__charconv/from_chars_result.h>
88# include <__charconv/tables.h>
89# include <__charconv/to_chars.h>
90# include <__charconv/to_chars_base_10.h>
91# include <__charconv/to_chars_floating_point.h>
92# include <__charconv/to_chars_integral.h>
93# include <__charconv/to_chars_result.h>
94# include <__charconv/traits.h>
95# endif // _LIBCPP_STD_VER >= 17
96
97# include <version>
98
99# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
100# pragma GCC system_header
101# endif
102
103_LIBCPP_BEGIN_NAMESPACE_STD
104
105_LIBCPP_END_NAMESPACE_STD
106
107# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
108# include <cmath>
109# include <concepts>
110# include <cstddef>
111# include <cstdint>
112# include <cstdlib>
113# include <cstring>
114# include <iosfwd>
115# include <limits>
116# include <new>
117# include <type_traits>
118# endif
119#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
120
121#endif // _LIBCPP_CHARCONV
122