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