libstdc++-v3/include/experimental/source_location

   1 // <experimental/source_location> -*- C++ -*-
   2
   3 // Copyright (C) 2015-2024 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // Under Section 7 of GPL version 3, you are granted additional
  17 // permissions described in the GCC Runtime Library Exception, version
  18 // 3.1, as published by the Free Software Foundation.
  19
  20 // You should have received a copy of the GNU General Public License and
  21 // a copy of the GCC Runtime Library Exception along with this program;
  22 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 // <http://www.gnu.org/licenses/>.
  24
  25 /** @file experimental/source_location
  26  *  This is a TS C++ Library header.
  27  *  @ingroup libfund-ts
  28  */
  29
  30 #ifndef _GLIBCXX_EXPERIMENTAL_SRCLOC
  31 #define _GLIBCXX_EXPERIMENTAL_SRCLOC 1
  32
  33 #include <bits/requires_hosted.h> // experimental is currently omitted
  34
  35 #if __cplusplus >= 201402L
  36 #include <cstdint>
  37
  38 namespace std {
  39 _GLIBCXX_BEGIN_NAMESPACE_VERSION
  40
  41 namespace experimental {
  42 inline namespace fundamentals_v2 {
  43 #define __cpp_lib_experimental_source_location 201505
  44
  45   struct source_location
  46   {
  47     // 14.1.2, source_location creation
  48     static constexpr source_location
  49     current(const char* __file = __builtin_FILE(),
  50             const char* __func = __builtin_FUNCTION(),
  51             int __line = __builtin_LINE(),
  52             int __col = 0) noexcept
  53     {
  54       source_location __loc;
  55       __loc._M_file = __file;
  56       __loc._M_func = __func;
  57       __loc._M_line = __line;
  58       __loc._M_col = __col;
  59       return __loc;
  60     }
  61
  62     constexpr source_location() noexcept
  63     : _M_file("unknown"), _M_func(_M_file), _M_line(0), _M_col(0)
  64     { }
  65
  66     // 14.1.3, source_location field access
  67     constexpr uint_least32_t line() const noexcept { return _M_line; }
  68     constexpr uint_least32_t column() const noexcept { return _M_col; }
  69     constexpr const char* file_name() const noexcept { return _M_file; }
  70     constexpr const char* function_name() const noexcept { return _M_func; }
  71
  72   private:
  73     const char* _M_file;
  74     const char* _M_func;
  75     uint_least32_t _M_line;
  76     uint_least32_t _M_col;
  77   };
  78 } // namespace fundamentals_v2
  79 } // namespace experimental
  80
  81 _GLIBCXX_END_NAMESPACE_VERSION
  82 } // namespace std
  83
  84 #endif // C++14
  85 #endif // _GLIBCXX_EXPERIMENTAL_SRCLOC