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2a82301d40
Apparently clang trunk implemented __builtin_source_location(), but the using __builtin_ret_type = decltype(__builtin_source_location()); which has been added for it isn't enough, they also need the std::source_location::__impl class to be defined (but incomplete seems to be good enough) before the builtin is used. The following has been tested on godbolt with clang trunk (old version fails with error: 'std::source_location::__impl' was not found; it must be defined before '__builtin_source_location' is called and some follow-up errors), getting back to just void * instead of __builtin_ret_type and commenting out using doesn't work either and just struct __impl; before using __builtin_ret_type doesn't work too. 2022-04-02 Jakub Jelinek <jakub@redhat.com> PR libstdc++/105128 * include/std/source_location (std::source_location::__impl): Move definition before using __builtin_ret_type.
93 lines
2.7 KiB
C++
93 lines
2.7 KiB
C++
// <source_location> -*- C++ -*-
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// Copyright (C) 2020-2022 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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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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using __builtin_ret_type = decltype(__builtin_source_location());
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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(__builtin_ret_type __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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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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