chromium/third_party/libc++/src/include/__charconv/from_chars_integral.h

// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCPP___CHARCONV_FROM_CHARS_INTEGRAL_H
#define _LIBCPP___CHARCONV_FROM_CHARS_INTEGRAL_H

#include <__algorithm/copy_n.h>
#include <__assert>
#include <__charconv/from_chars_result.h>
#include <__charconv/traits.h>
#include <__config>
#include <__memory/addressof.h>
#include <__system_error/errc.h>
#include <__type_traits/enable_if.h>
#include <__type_traits/integral_constant.h>
#include <__type_traits/is_integral.h>
#include <__type_traits/is_unsigned.h>
#include <__type_traits/make_unsigned.h>
#include <limits>

#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#  pragma GCC system_header
#endif

_LIBCPP_PUSH_MACROS
#include <__undef_macros>

_LIBCPP_BEGIN_NAMESPACE_STD

#if _LIBCPP_STD_VER >= 17

from_chars_result from_chars(const char*, const char*, bool, int = 10) = delete;

template <typename _It, typename _Tp, typename _Fn, typename... _Ts>
inline _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI from_chars_result
__sign_combinator(_It __first, _It __last, _Tp& __value, _Fn __f, _Ts... __args) { … }

template <typename _Tp>
inline _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI bool __in_pattern(_Tp __c) { … }

struct _LIBCPP_HIDDEN __in_pattern_result { … };

template <typename _Tp>
inline _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI __in_pattern_result __in_pattern(_Tp __c, int __base) { … }

template <typename _It, typename _Tp, typename _Fn, typename... _Ts>
inline _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI from_chars_result
__subject_seq_combinator(_It __first, _It __last, _Tp& __value, _Fn __f, _Ts... __args) { … }

template <typename _Tp, __enable_if_t<is_unsigned<_Tp>::value, int> = 0>
inline _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI from_chars_result
__from_chars_atoi(const char* __first, const char* __last, _Tp& __value) { … }

template <typename _Tp, __enable_if_t<is_signed<_Tp>::value, int> = 0>
inline _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI from_chars_result
__from_chars_atoi(const char* __first, const char* __last, _Tp& __value) { … }

/*
// Code used to generate __from_chars_log2f_lut.
#include <cmath>
#include <format>
#include <iostream>

int main() {
  for (int i = 2; i <= 36; ++i)
    std::cout << std::format("{},\n", log2f(i));
}
*/
/// log2f table for bases [2, 36].
inline constexpr float __from_chars_log2f_lut[35] = …;

template <typename _Tp, __enable_if_t<is_unsigned<_Tp>::value, int> = 0>
inline _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI from_chars_result
__from_chars_integral(const char* __first, const char* __last, _Tp& __value, int __base) { … }

template <typename _Tp, __enable_if_t<is_signed<_Tp>::value, int> = 0>
inline _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI from_chars_result
__from_chars_integral(const char* __first, const char* __last, _Tp& __value, int __base) { … }

template <typename _Tp, __enable_if_t<is_integral<_Tp>::value, int> = 0>
inline _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI from_chars_result
from_chars(const char* __first, const char* __last, _Tp& __value) { … }

template <typename _Tp, __enable_if_t<is_integral<_Tp>::value, int> = 0>
inline _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI from_chars_result
from_chars(const char* __first, const char* __last, _Tp& __value, int __base) { … }
#endif // _LIBCPP_STD_VER >= 17

_LIBCPP_END_NAMESPACE_STD

_LIBCPP_POP_MACROS

#endif // _LIBCPP___CHARCONV_FROM_CHARS_INTEGRAL_H