libcxx/include/charconv

   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
  16 namespace 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 #include <__config>
  79
  80 #if _LIBCPP_STD_VER >= 17
  81 #  include <__charconv/chars_format.h>
  82 #  include <__charconv/from_chars_floating_point.h>
  83 #  include <__charconv/from_chars_integral.h>
  84 #  include <__charconv/from_chars_result.h>
  85 #  include <__charconv/tables.h>
  86 #  include <__charconv/to_chars.h>
  87 #  include <__charconv/to_chars_base_10.h>
  88 #  include <__charconv/to_chars_floating_point.h>
  89 #  include <__charconv/to_chars_integral.h>
  90 #  include <__charconv/to_chars_result.h>
  91 #  include <__charconv/traits.h>
  92 #endif // _LIBCPP_STD_VER >= 17
  93
  94 #include <version>
  95
  96 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  97 #  pragma GCC system_header
  98 #endif
  99
 100 _LIBCPP_BEGIN_NAMESPACE_STD
 101
 102 _LIBCPP_END_NAMESPACE_STD
 103
 104 #if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
 105 #  include <cmath>
 106 #  include <concepts>
 107 #  include <cstddef>
 108 #  include <cstdint>
 109 #  include <cstdlib>
 110 #  include <cstring>
 111 #  include <iosfwd>
 112 #  include <limits>
 113 #  include <type_traits>
 114 #endif
 115
 116 #endif // _LIBCPP_CHARCONV