v1/__charconv/from_chars_result.h

0001 // -*- C++ -*-
0002 //===----------------------------------------------------------------------===//
0003 //
0004 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0005 // See https://llvm.org/LICENSE.txt for license information.
0006 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0007 //
0008 //===----------------------------------------------------------------------===//
0009
0010 #ifndef _LIBCPP___CHARCONV_FROM_CHARS_RESULT_H
0011 #define _LIBCPP___CHARCONV_FROM_CHARS_RESULT_H
0012
0013 #include <__config>
0014 #include <__system_error/errc.h>
0015
0016 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0017 #  pragma GCC system_header
0018 #endif
0019
0020 _LIBCPP_BEGIN_NAMESPACE_STD
0021
0022 #if _LIBCPP_STD_VER >= 17
0023
0024 struct _LIBCPP_EXPORTED_FROM_ABI from_chars_result {
0025   const char* ptr;
0026   errc ec;
0027 #  if _LIBCPP_STD_VER >= 20
0028   _LIBCPP_HIDE_FROM_ABI friend bool operator==(const from_chars_result&, const from_chars_result&) = default;
0029 #  endif
0030 #  if _LIBCPP_STD_VER >= 26
0031   _LIBCPP_HIDE_FROM_ABI constexpr explicit operator bool() const noexcept { return ec == errc{}; }
0032 #  endif
0033 };
0034
0035 #endif // _LIBCPP_STD_VER >= 17
0036
0037 _LIBCPP_END_NAMESPACE_STD
0038
0039 #endif // _LIBCPP___CHARCONV_FROM_CHARS_RESULT_H