libstdc++
string
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1 // Components for manipulating sequences of characters -*- C++ -*-
2 
3 // Copyright (C) 1997-2025 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/string
26  * This is a Standard C++ Library header.
27  */
28 
29 //
30 // ISO C++ 14882: 21 Strings library
31 //
32 
33 #ifndef _GLIBCXX_STRING
34 #define _GLIBCXX_STRING 1
35 
36 #ifdef _GLIBCXX_SYSHDR
37 #pragma GCC system_header
38 #endif
39 
40 #include <bits/requires_hosted.h> // containers
41 
42 #include <bits/c++config.h>
43 #include <bits/stringfwd.h>
44 #include <bits/char_traits.h>
45 #include <bits/allocator.h>
46 #include <bits/cpp_type_traits.h>
47 #include <bits/localefwd.h> // For operators >>, <<, and getline.
48 #include <bits/ostream_insert.h>
49 #include <bits/stl_iterator_base_funcs.h>
50 #include <bits/stl_iterator.h>
51 #include <bits/stl_function.h> // For less
52 #include <ext/numeric_traits.h>
53 #include <bits/stl_algobase.h>
54 #include <bits/refwrap.h>
55 #include <bits/range_access.h>
56 #include <bits/basic_string.h>
57 #include <bits/basic_string.tcc>
58 
59 #define __glibcxx_want_algorithm_default_value_type
60 #define __glibcxx_want_allocator_traits_is_always_equal
61 #define __glibcxx_want_constexpr_char_traits
62 #define __glibcxx_want_constexpr_string
63 #define __glibcxx_want_containers_ranges
64 #define __glibcxx_want_erase_if
65 #define __glibcxx_want_nonmember_container_access
66 #define __glibcxx_want_string_resize_and_overwrite
67 #define __glibcxx_want_string_udls
68 #define __glibcxx_want_to_string
69 #include <bits/version.h>
70 
71 #if __cplusplus >= 201703L && _GLIBCXX_USE_CXX11_ABI
72 #include <bits/memory_resource.h>
73 namespace std _GLIBCXX_VISIBILITY(default)
74 {
75 _GLIBCXX_BEGIN_NAMESPACE_VERSION
76  namespace pmr {
77  template<typename _CharT, typename _Traits = char_traits<_CharT>>
78  using basic_string = std::basic_string<_CharT, _Traits,
79  polymorphic_allocator<_CharT>>;
80  using string = basic_string<char>;
81 #ifdef _GLIBCXX_USE_CHAR8_T
82  using u8string = basic_string<char8_t>;
83 #endif
84  using u16string = basic_string<char16_t>;
85  using u32string = basic_string<char32_t>;
86  using wstring = basic_string<wchar_t>;
87  } // namespace pmr
88 _GLIBCXX_END_NAMESPACE_VERSION
89 } // namespace std
90 #endif // C++17
91 
92 #ifdef __cpp_lib_erase_if // C++ >= 20 && HOSTED
93 namespace std _GLIBCXX_VISIBILITY(default)
94 {
95 _GLIBCXX_BEGIN_NAMESPACE_VERSION
96 
97  template<typename _CharT, typename _Traits, typename _Alloc,
98  typename _Predicate>
99  _GLIBCXX20_CONSTEXPR
100  inline typename basic_string<_CharT, _Traits, _Alloc>::size_type
101  erase_if(basic_string<_CharT, _Traits, _Alloc>& __cont, _Predicate __pred)
102  {
103  using namespace __gnu_cxx;
104  const auto __osz = __cont.size();
105  const auto __end = __cont.end();
106  auto __removed = std::__remove_if(__cont.begin(), __end,
107  __ops::__pred_iter(std::ref(__pred)));
108  __cont.erase(__removed, __end);
109  return __osz - __cont.size();
110  }
111 
112  template<typename _CharT, typename _Traits, typename _Alloc,
113  typename _Up _GLIBCXX26_DEF_VAL_T(_CharT)>
114  _GLIBCXX20_CONSTEXPR
115  inline typename basic_string<_CharT, _Traits, _Alloc>::size_type
116  erase(basic_string<_CharT, _Traits, _Alloc>& __cont, const _Up& __value)
117  {
118  using namespace __gnu_cxx;
119  const auto __osz = __cont.size();
120  const auto __end = __cont.end();
121  auto __removed = std::__remove_if(__cont.begin(), __end,
122  __ops::__iter_equals_val(__value));
123  __cont.erase(__removed, __end);
124  return __osz - __cont.size();
125  }
126 _GLIBCXX_END_NAMESPACE_VERSION
127 } // namespace std
128 #endif // __cpp_lib_erase_if
129 
130 #endif /* _GLIBCXX_STRING */