libstdc++-v3/include/std/forward_list

   1 // <forward_list> -*- C++ -*-
   2
   3 // Copyright (C) 2008-2025 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 include/forward_list
  26  *  This is a Standard C++ Library header.
  27  */
  28
  29 #ifndef _GLIBCXX_FORWARD_LIST
  30 #define _GLIBCXX_FORWARD_LIST 1
  31
  32 #ifdef _GLIBCXX_SYSHDR
  33 #pragma GCC system_header
  34 #endif
  35
  36 #include <bits/requires_hosted.h> // containers
  37
  38 #if __cplusplus < 201103L
  39 # include <bits/c++0x_warning.h>
  40 #else
  41
  42 #include <bits/forward_list.h>
  43 #include <bits/range_access.h>
  44 #include <bits/forward_list.tcc>
  45
  46 #ifdef _GLIBCXX_DEBUG
  47 # include <debug/forward_list>
  48 #endif
  49
  50 #define __glibcxx_want_algorithm_default_value_type
  51 #define __glibcxx_want_allocator_traits_is_always_equal
  52 #define __glibcxx_want_containers_ranges
  53 #define __glibcxx_want_erase_if
  54 #define __glibcxx_want_incomplete_container_elements
  55 #define __glibcxx_want_list_remove_return_type
  56 #define __glibcxx_want_nonmember_container_access
  57 #include <bits/version.h>
  58
  59 #if __cplusplus >= 201703L
  60 #include <bits/memory_resource.h>
  61 namespace std _GLIBCXX_VISIBILITY(default)
  62 {
  63 _GLIBCXX_BEGIN_NAMESPACE_VERSION
  64   namespace pmr
  65   {
  66     template<typename _Tp>
  67       using forward_list = std::forward_list<_Tp, polymorphic_allocator<_Tp>>;
  68   } // namespace pmr
  69 _GLIBCXX_END_NAMESPACE_VERSION
  70 } // namespace std
  71 #endif // C++17
  72
  73 #ifdef __cpp_lib_erase_if // C++ >= 20 && HOSTED
  74 namespace std _GLIBCXX_VISIBILITY(default)
  75 {
  76 _GLIBCXX_BEGIN_NAMESPACE_VERSION
  77   template<typename _Tp, typename _Alloc, typename _Predicate>
  78     inline typename forward_list<_Tp, _Alloc>::size_type
  79     erase_if(forward_list<_Tp, _Alloc>& __cont, _Predicate __pred)
  80     { return __cont.remove_if(__pred); }
  81
  82   template<typename _Tp, typename _Alloc,
  83            typename _Up _GLIBCXX26_DEF_VAL_T(_Tp)>
  84     inline typename forward_list<_Tp, _Alloc>::size_type
  85     erase(forward_list<_Tp, _Alloc>& __cont, const _Up& __value)
  86     {
  87       // _GLIBCXX_RESOLVE_LIB_DEFECTS
  88       // 4135. helper lambda of std::erase for list should specify return type
  89       return std::erase_if(__cont, [&](const auto& __elem) -> bool {
  90           return __elem == __value;
  91       });
  92     }
  93 _GLIBCXX_END_NAMESPACE_VERSION
  94 } // namespace std
  95 #endif // __cpp_lib_erase_if
  96
  97 #endif // C++11
  98
  99 #endif // _GLIBCXX_FORWARD_LIST