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_CHARCONV
11 #define _LIBCPP_CHARCONV
18 // floating-point format for primitive numerical conversion
19 enum class chars_format {
20 scientific = unspecified,
23 general = fixed | scientific
26 // 23.20.2, primitive numerical output conversion
27 struct to_chars_result {
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
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;
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);
43 to_chars_result to_chars(char* first, char* last, float value,
45 to_chars_result to_chars(char* first, char* last, double value,
47 to_chars_result to_chars(char* first, char* last, long double value,
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);
57 // 23.20.3, primitive numerical input conversion
58 struct from_chars_result {
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
65 constexpr from_chars_result from_chars(const char* first, const char* last,
66 see below& value, int base = 10); // constexpr since C++23
72 #include <__assert> // all public C++ headers provide the assertion handler
73 #include <__charconv/chars_format.h>
74 #include <__charconv/from_chars_integral.h>
75 #include <__charconv/from_chars_result.h>
76 #include <__charconv/tables.h>
77 #include <__charconv/to_chars.h>
78 #include <__charconv/to_chars_base_10.h>
79 #include <__charconv/to_chars_floating_point.h>
80 #include <__charconv/to_chars_integral.h>
81 #include <__charconv/to_chars_result.h>
82 #include <__charconv/traits.h>
84 #include <__system_error/errc.h>
87 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
88 # pragma GCC system_header
91 _LIBCPP_BEGIN_NAMESPACE_STD
93 _LIBCPP_END_NAMESPACE_STD
95 #if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
103 # include <type_traits>
106 #endif // _LIBCPP_CHARCONV