source_location
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// <source_location> -*- C++ -*-
// Copyright (C) 2020-2021 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
/** @file include/source_location
* This is a Standard C++ Library header.
*/
#ifndef _GLIBCXX_SRCLOC
#define _GLIBCXX_SRCLOC 1
#if __cplusplus > 201703L && __has_builtin(__builtin_source_location)
#include <bits/c++config.h>
namespace std
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
#define __cpp_lib_source_location 201907L
/// A class that describes a location in source code.
struct source_location
{
private:
using uint_least32_t = __UINT_LEAST32_TYPE__;
public:
// [support.srcloc.cons], creation
static consteval source_location
current(const void* __p = __builtin_source_location()) noexcept
{
source_location __ret;
__ret._M_impl = static_cast <const __impl*>(__p);
return __ret;
}
constexpr source_location() noexcept { }
// [support.srcloc.obs], observers
constexpr uint_least32_t
line() const noexcept
{ return _M_impl ? _M_impl->_M_line : 0u; }
constexpr uint_least32_t
column() const noexcept
{ return _M_impl ? _M_impl->_M_column : 0u; }
constexpr const char*
file_name() const noexcept
{ return _M_impl ? _M_impl->_M_file_name : ""; }
constexpr const char*
function_name() const noexcept
{ return _M_impl ? _M_impl->_M_function_name : ""; }
private:
struct __impl
{
const char* _M_file_name;
const char* _M_function_name;
unsigned _M_line;
unsigned _M_column;
};
const __impl* _M_impl = nullptr;
};
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#endif // C++20 && __builtin_source_location
#endif // _GLIBCXX_SRCLOC