string
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// Components for manipulating sequences of characters -*- C++ -*-
// Copyright (C) 1997-2026 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
/** @file include/string
* This is a Standard C++ Library header.
*/
//
// ISO C++ 14882: 21 Strings library
//
#ifndef _GLIBCXX_STRING
#define _GLIBCXX_STRING 1
#ifdef _GLIBCXX_SYSHDR
#pragma GCC system_header
#endif
#include <bits/requires_hosted.h> // containers
#include <bits/c++config.h>
#define __glibcxx_exc_in_string 1
#include <bits/stringfwd.h>
#include <bits/char_traits.h>
#include <bits/allocator.h>
#include <bits/cpp_type_traits.h>
#include <bits/localefwd.h> // For operators >>, <<, and getline.
#include <bits/ostream_insert.h>
#include <bits/stl_iterator_base_funcs.h>
#include <bits/stl_iterator.h>
#include <bits/stl_function.h> // For less
#include <ext/numeric_traits.h>
#include <bits/stdexcept_throw.h>
#include <bits/stl_algobase.h>
#include <bits/range_access.h>
#include <bits/erase_if.h>
#include <bits/basic_string.h>
#include <bits/basic_string.tcc>
#if (_GLIBCXX_HOSTED && __cpp_exceptions && __cplusplus > 202302L \
&& __cpp_constexpr_exceptions >= 202411L)
#include <bits/stdexcept_except.h>
#undef __glibcxx_exc_in_string
#include <bits/stdexcept_throw.h>
#else
#undef __glibcxx_exc_in_string
#endif
#define __glibcxx_want_algorithm_default_value_type
#define __glibcxx_want_allocator_traits_is_always_equal
#define __glibcxx_want_constexpr_char_traits
#define __glibcxx_want_constexpr_string
#define __glibcxx_want_containers_ranges
#define __glibcxx_want_erase_if
#define __glibcxx_want_nonmember_container_access
#define __glibcxx_want_string_resize_and_overwrite
#define __glibcxx_want_string_subview
#define __glibcxx_want_string_udls
#define __glibcxx_want_to_string
#include <bits/version.h>
#if __cplusplus >= 201703L && _GLIBCXX_USE_CXX11_ABI
#include <bits/memory_resource.h>
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
namespace pmr {
template<typename _CharT, typename _Traits = char_traits<_CharT>>
using basic_string = std::basic_string<_CharT, _Traits,
polymorphic_allocator<_CharT>>;
using string = basic_string<char>;
#ifdef _GLIBCXX_USE_CHAR8_T
using u8string = basic_string<char8_t>;
#endif
using u16string = basic_string<char16_t>;
using u32string = basic_string<char32_t>;
using wstring = basic_string<wchar_t>;
} // namespace pmr
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#endif // C++17
#ifdef __cpp_lib_erase_if // C++ >= 20 && HOSTED
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _CharT, typename _Traits, typename _Alloc,
typename _Predicate>
constexpr typename basic_string<_CharT, _Traits, _Alloc>::size_type
erase_if(basic_string<_CharT, _Traits, _Alloc>& __cont, _Predicate __pred)
{ return __detail::__erase_if(__cont, __cont, std::move(__pred)); }
template<typename _CharT, typename _Traits, typename _Alloc,
typename _Up _GLIBCXX26_DEF_VAL_T(_CharT)>
constexpr typename basic_string<_CharT, _Traits, _Alloc>::size_type
erase(basic_string<_CharT, _Traits, _Alloc>& __cont, const _Up& __value)
{ return std::erase_if(__cont, __gnu_cxx::__ops::__equal_to(__value)); }
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#endif // __cpp_lib_erase_if
#endif /* _GLIBCXX_STRING */
basic_string.h
allocator.h
basic_string.tcc
stringfwd.h
stl_iterator_base_funcs.h
stl_function.h
range_access.h
stdexcept_throw.h
localefwd.h
char_traits.h
version.h
memory_resource.h
ostream_insert.h
stdexcept_except.h
stl_algobase.h
erase_if.h
cpp_type_traits.h
requires_hosted.h
c++config.h
std::move
constexpr std::remove_reference< _Tp >::type && move(_Tp &&__t) noexcept
Convert a value to an rvalue.
Definition move.h:138
std
ISO C++ entities toplevel namespace is std.
std::basic_string
Managing sequences of characters and character-like objects.
Definition basic_string.h:94
std::pmr::polymorphic_allocator
Class template polymorphic_allocator.
Definition memory_resource.h:124
stl_iterator.h
numeric_traits.h