flat_set
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// <flat_set> -*- C++ -*-
// Copyright The GNU Toolchain Authors.
//
// 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/flat_set
* This is a Standard C++ Library header.
*/
#ifndef _GLIBCXX_FLAT_SET
#define _GLIBCXX_FLAT_SET 1
#ifdef _GLIBCXX_SYSHDR
#pragma GCC system_header
#endif
#define __glibcxx_want_constexpr_flat_set
#define __glibcxx_want_flat_set
#include <bits/version.h>
#ifdef __cpp_lib_flat_set // >= C++23
#include <compare>
#include <initializer_list>
#include <exception>
#include <functional> // not_fn
#include <optional>
#include <type_traits>
#include <vector>
#include <bits/stl_algo.h>
#include <bits/stl_function.h> // less
#include <bits/stl_pair.h>
#include <bits/uses_allocator_args.h> // make_obj_using_allocator
#ifdef _GLIBCXX_DEBUG
# include <bits/ranges_algo.h> // ranges::is_sorted
#endif
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _Key, typename _Compare,
typename _KeyContainer>
class flat_set;
template<typename _Key, typename _Compare,
typename _KeyContainer>
class flat_multiset;
template<typename _Key, typename _Compare, typename _KeyContainer, bool _Multi>
class _Flat_set_impl
{
static_assert(is_same_v<_Key, typename _KeyContainer::value_type>);
using _Derived = __conditional_t<_Multi,
flat_multiset<_Key, _Compare, _KeyContainer>,
flat_set<_Key, _Compare, _KeyContainer>>;
using __sorted_t = __conditional_t<_Multi, sorted_equivalent_t, sorted_unique_t>;
public:
using key_type = _Key;
using value_type = _Key;
using key_compare = _Compare;
using value_compare = _Compare;
using reference = value_type&;
using const_reference = const value_type&;
using size_type = typename _KeyContainer::size_type;
using difference_type = typename _KeyContainer::difference_type;
using iterator = typename _KeyContainer::const_iterator;
using const_iterator = typename _KeyContainer::const_iterator;
using reverse_iterator = std::reverse_iterator<iterator>;
using const_reverse_iterator = std::reverse_iterator<const_iterator>;
using container_type = _KeyContainer;
private:
using __emplace_result_t = __conditional_t<_Multi, iterator, pair<iterator, bool>>;
struct _ClearGuard
{
container_type* _M_cont;
_GLIBCXX26_CONSTEXPR
_ClearGuard(container_type& __cont)
: _M_cont(std::__addressof(__cont))
{ }
_GLIBCXX26_CONSTEXPR
~_ClearGuard()
{
if (_M_cont)
_M_cont->clear();
}
_GLIBCXX26_CONSTEXPR
void
_M_disable()
{ _M_cont = nullptr; }
};
_GLIBCXX26_CONSTEXPR
_ClearGuard
_M_make_clear_guard()
{ return _ClearGuard{this->_M_cont}; }
public:
// constructors
_GLIBCXX26_CONSTEXPR
_Flat_set_impl() : _Flat_set_impl(key_compare()) { }
_GLIBCXX26_CONSTEXPR
explicit
_Flat_set_impl(const key_compare& __comp)
: _M_cont(), _M_comp(__comp)
{ }
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(container_type __cont, const key_compare& __comp = key_compare())
: _M_cont(std::move(__cont)), _M_comp(__comp)
{ _M_sort_uniq(); }
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(__sorted_t,
container_type __cont, const key_compare& __comp = key_compare())
: _M_cont(std::move(__cont)), _M_comp(__comp)
{ _GLIBCXX_DEBUG_ASSERT(ranges::is_sorted(_M_cont, _M_comp)); }
template<__has_input_iter_cat _InputIterator>
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(_InputIterator __first, _InputIterator __last,
const key_compare& __comp = key_compare())
: _M_cont(), _M_comp(__comp)
{ insert(__first, __last); }
template<__has_input_iter_cat _InputIterator>
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(__sorted_t __s,
_InputIterator __first, _InputIterator __last,
const key_compare& __comp = key_compare())
: _M_cont(), _M_comp(__comp)
{ insert(__s, __first, __last); }
template<__detail::__container_compatible_range<value_type> _Rg>
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(from_range_t, _Rg&& __rg)
: _Flat_set_impl(from_range, std::forward<_Rg>(__rg), key_compare())
{ }
template<__detail::__container_compatible_range<value_type> _Rg>
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(from_range_t, _Rg&& __rg, const key_compare& __comp)
: _Flat_set_impl(__comp)
{ insert_range(std::forward<_Rg>(__rg)); }
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(initializer_list<value_type> __il,
const key_compare& __comp = key_compare())
: _Flat_set_impl(__il.begin(), __il.end(), __comp)
{ }
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(__sorted_t __s,
initializer_list<value_type> __il,
const key_compare& __comp = key_compare())
: _Flat_set_impl(__s, __il.begin(), __il.end(), __comp)
{ }
// constructors with allocators
template<__allocator_for<container_type> _Alloc>
_GLIBCXX26_CONSTEXPR
explicit
_Flat_set_impl(const _Alloc& __a)
: _Flat_set_impl(key_compare(), __a)
{ }
template<__allocator_for<container_type> _Alloc>
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(const key_compare& __comp, const _Alloc& __a)
: _M_cont(std::make_obj_using_allocator<container_type>(__a)),
_M_comp(__comp)
{ }
template<__allocator_for<container_type> _Alloc>
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(const container_type& __cont, const _Alloc& __a)
: _Flat_set_impl(__cont, key_compare(), __a)
{ }
template<__allocator_for<container_type> _Alloc>
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(const container_type& __cont, const key_compare& __comp,
const _Alloc& __a)
: _M_cont(std::make_obj_using_allocator<container_type>(__a, __cont)),
_M_comp(__comp)
{ _M_sort_uniq(); }
template<__allocator_for<container_type> _Alloc>
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(__sorted_t __s, const container_type& __cont, const _Alloc& __a)
: _Flat_set_impl(__s, __cont, key_compare(), __a)
{ }
template<__allocator_for<container_type> _Alloc>
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(__sorted_t, const container_type& __cont, const key_compare& __comp,
const _Alloc& __a)
: _M_cont(std::make_obj_using_allocator<container_type>(__a, __cont)),
_M_comp(__comp)
{ _GLIBCXX_DEBUG_ASSERT(ranges::is_sorted(_M_cont, _M_comp)); }
template<__allocator_for<container_type> _Alloc>
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(const _Derived& __x, const _Alloc& __a)
: _M_cont(std::make_obj_using_allocator<container_type>(__a, __x._M_cont)),
_M_comp(__x._M_comp)
{ }
template<__allocator_for<container_type> _Alloc>
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(_Derived&& __x, const _Alloc& __a)
: _M_cont(std::make_obj_using_allocator<container_type>(__a, std::move(__x._M_cont))),
_M_comp(__x._M_comp)
{ }
template<__has_input_iter_cat _InputIterator, __allocator_for<container_type> _Alloc>
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(_InputIterator __first, _InputIterator __last,
const _Alloc& __a)
: _Flat_set_impl(std::move(__first), std::move(__last), key_compare(), __a)
{ }
template<__has_input_iter_cat _InputIterator, __allocator_for<container_type> _Alloc>
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(_InputIterator __first, _InputIterator __last,
const key_compare& __comp,
const _Alloc& __a)
: _Flat_set_impl(__comp, __a)
{ insert(__first, __last); }
template<__has_input_iter_cat _InputIterator, __allocator_for<container_type> _Alloc>
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(__sorted_t __s,
_InputIterator __first, _InputIterator __last,
const _Alloc& __a)
: _Flat_set_impl(__s, std::move(__first), std::move(__last), key_compare(), __a)
{ }
template<__has_input_iter_cat _InputIterator, __allocator_for<container_type> _Alloc>
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(__sorted_t __s,
_InputIterator __first, _InputIterator __last,
const key_compare& __comp,
const _Alloc& __a)
: _Flat_set_impl(__comp, __a)
{ insert(__s, __first, __last); }
template<__detail::__container_compatible_range<value_type> _Rg,
__allocator_for<container_type> _Alloc>
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(from_range_t, _Rg&& __rg,
const _Alloc& __a)
: _Flat_set_impl(from_range, std::forward<_Rg>(__rg), key_compare(), __a)
{ }
template<__detail::__container_compatible_range<value_type> _Rg,
__allocator_for<container_type> _Alloc>
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(from_range_t, _Rg&& __rg,
const key_compare& __comp,
const _Alloc& __a)
: _Flat_set_impl(__comp, __a)
{ insert_range(std::forward<_Rg>(__rg)); }
template<__allocator_for<container_type> _Alloc>
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(initializer_list<value_type> __il,
const _Alloc& __a)
: _Flat_set_impl(__il, key_compare(), __a)
{ }
template<__allocator_for<container_type> _Alloc>
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(initializer_list<value_type> __il,
const key_compare& __comp,
const _Alloc& __a)
: _Flat_set_impl(__il.begin(), __il.end(), __comp, __a)
{ }
template<__allocator_for<container_type> _Alloc>
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(__sorted_t __s,
initializer_list<value_type> __il,
const _Alloc& __a)
: _Flat_set_impl(__s, __il.begin(), __il.end(), key_compare(), __a)
{ }
template<__allocator_for<container_type> _Alloc>
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(__sorted_t __s,
initializer_list<value_type> __il,
const key_compare& __comp,
const _Alloc& __a)
: _Flat_set_impl(__s, __il.begin(), __il.end(), __comp, __a)
{ }
_Flat_set_impl(const _Flat_set_impl&) = default;
_Flat_set_impl& operator=(const _Flat_set_impl&) = default;
_GLIBCXX26_CONSTEXPR
_Flat_set_impl(_Flat_set_impl&& __other)
noexcept(is_nothrow_move_constructible_v<container_type>
&& is_nothrow_move_constructible_v<key_compare>)
#if __cpp_exceptions
try
#endif
: _M_cont(std::move(__other._M_cont)), _M_comp(std::move(__other._M_comp))
{ __other.clear(); }
#if __cpp_exceptions
catch (...)
{ __other.clear(); }
#endif
_GLIBCXX26_CONSTEXPR
_Flat_set_impl&
operator=(_Flat_set_impl&& __other)
noexcept(is_nothrow_move_assignable_v<container_type>
&& is_nothrow_move_assignable_v<key_compare>)
{
auto __guard = _M_make_clear_guard();
auto __guard_other = _ClearGuard{__other._M_cont};
_M_cont = std::move(__other._M_cont);
_M_comp = std::move(__other._M_comp);
__guard._M_disable();
// __guard_other._M_disable is deliberately not called.
return *this;
}
_GLIBCXX26_CONSTEXPR
_Derived&
operator=(initializer_list<value_type> __il)
{
auto __guard = _M_make_clear_guard();
_M_cont = __il;
_M_sort_uniq();
__guard._M_disable();
return static_cast<_Derived&>(*this);
}
// iterators
_GLIBCXX26_CONSTEXPR
const_iterator
begin() const noexcept
{ return _M_cont.begin(); }
_GLIBCXX26_CONSTEXPR
const_iterator
end() const noexcept
{ return _M_cont.end(); }
_GLIBCXX26_CONSTEXPR
const_reverse_iterator
rbegin() const noexcept
{ return const_reverse_iterator(end()); }
_GLIBCXX26_CONSTEXPR
const_reverse_iterator
rend() const noexcept
{ return const_reverse_iterator(begin()); }
_GLIBCXX26_CONSTEXPR
const_iterator
cbegin() const noexcept
{ return begin(); }
_GLIBCXX26_CONSTEXPR
const_iterator
cend() const noexcept
{ return end(); }
_GLIBCXX26_CONSTEXPR
const_reverse_iterator
crbegin() const noexcept
{ return rbegin(); }
_GLIBCXX26_CONSTEXPR
const_reverse_iterator
crend() const noexcept
{ return rend(); }
// capacity
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
bool
empty() const noexcept
{ return _M_cont.empty(); }
_GLIBCXX26_CONSTEXPR
size_type
size() const noexcept
{ return _M_cont.size(); }
_GLIBCXX26_CONSTEXPR
size_type
max_size() const noexcept
{ return _M_cont.max_size(); }
// modifiers
template<typename _Arg, typename... _Args>
_GLIBCXX26_CONSTEXPR
pair<iterator, bool>
_M_try_emplace(optional<const_iterator> __hint, _Arg&& __arg, _Args&&... __args)
{
// TODO: Simplify and audit the hint handling.
auto&& __k = [&] -> decltype(auto) {
if constexpr (sizeof...(_Args) == 0
&& same_as<remove_cvref_t<_Arg>, value_type>)
return std::forward<_Arg>(__arg);
else
return value_type(std::forward<_Arg>(__arg),
std::forward<_Args>(__args)...);
}();
typename container_type::iterator __it;
int __r = -1, __s = -1;
if (__hint.has_value()
&& (__hint == cbegin()
|| (__r = !_M_comp(__k, (*__hint)[-1]))) // k >= hint[-1]
&& (__hint == cend()
|| (__s = !_M_comp((*__hint)[0], __k)))) // k <= hint[0]
{
__it = _M_cont.begin() + (*__hint - begin());
if constexpr (!_Multi)
if (__r == 1 && !_M_comp(__it[-1], __k)) // k == hint[-1]
return {__it - 1, false};
}
else
{
auto __first = _M_cont.begin();
auto __last = _M_cont.end();
if (__r == 1) // k >= hint[-1]
__first += *__hint - _M_cont.begin();
else if (__r == 0) // k < __hint[-1]
__last = __first + (*__hint - _M_cont.begin());
if constexpr (_Multi)
{
if (__s == 0) // hint[0] < k
// Insert before the leftmost equivalent key.
__it = std::lower_bound(__first, __last, __k, _M_comp);
else
// Insert after the rightmost equivalent key.
__it = std::upper_bound(std::make_reverse_iterator(__last),
std::make_reverse_iterator(__first),
__k, std::not_fn(_M_comp)).base();
}
else
__it = std::lower_bound(__first, __last, __k, _M_comp);
}
if constexpr (!_Multi)
if (__it != _M_cont.end() && !_M_comp(__k, __it[0]))
return {__it, false};
auto __guard = _M_make_clear_guard();
__it = _M_cont.insert(__it, std::forward<decltype(__k)>(__k));
__guard._M_disable();
return {__it, true};
}
template<typename... _Args>
_GLIBCXX26_CONSTEXPR
pair<iterator, bool>
_M_try_emplace(optional<const_iterator> __hint)
{ return _M_try_emplace(__hint, value_type()); }
template<typename... _Args>
requires is_constructible_v<value_type, _Args...>
_GLIBCXX26_CONSTEXPR
__emplace_result_t
emplace(_Args&&... __args)
{
auto __r = _M_try_emplace(nullopt, std::forward<_Args>(__args)...);
if constexpr (_Multi)
return __r.first;
else
return __r;
}
template<typename... _Args>
_GLIBCXX26_CONSTEXPR
iterator
emplace_hint(const_iterator __position, _Args&&... __args)
{ return _M_try_emplace(__position, std::forward<_Args>(__args)...).first; }
_GLIBCXX26_CONSTEXPR
__emplace_result_t
insert(const value_type& __x)
{ return emplace(__x); }
_GLIBCXX26_CONSTEXPR
__emplace_result_t
insert(value_type&& __x)
{ return emplace(std::move(__x)); }
_GLIBCXX26_CONSTEXPR
iterator
insert(const_iterator __position, const value_type& __x)
{ return emplace_hint(__position, __x); }
_GLIBCXX26_CONSTEXPR
iterator
insert(const_iterator __position, value_type&& __x)
{ return emplace_hint(__position, std::move(__x)); }
template<typename _Arg>
requires is_constructible_v<value_type, _Arg>
_GLIBCXX26_CONSTEXPR
__emplace_result_t
insert(_Arg&& __x)
{ return emplace(std::forward<_Arg>(__x)); }
template<typename _Arg>
requires is_constructible_v<value_type, _Arg>
_GLIBCXX26_CONSTEXPR
iterator
insert(const_iterator __position, _Arg&& __x)
{ return emplace_hint(__position, std::forward<_Arg>(__x)); }
template<__has_input_iter_cat _InputIterator>
_GLIBCXX26_CONSTEXPR
void
insert(_InputIterator __first, _InputIterator __last)
{
auto __guard = _M_make_clear_guard();
auto __it = _M_cont.insert(_M_cont.end(), __first, __last);
std::sort(__it, _M_cont.end(), _M_comp);
std::inplace_merge(_M_cont.begin(), __it, _M_cont.end(), _M_comp);
if constexpr (!_Multi)
_M_unique();
__guard._M_disable();
}
template<__has_input_iter_cat _InputIterator>
_GLIBCXX26_CONSTEXPR
void
insert(__sorted_t, _InputIterator __first, _InputIterator __last)
{
auto __guard = _M_make_clear_guard();
auto __it = _M_cont.insert(_M_cont.end(), __first, __last);
std::inplace_merge(_M_cont.begin(), __it, _M_cont.end(), _M_comp);
if constexpr (!_Multi)
_M_unique();
__guard._M_disable();
}
template<typename _Rg>
_GLIBCXX26_CONSTEXPR
void
_M_insert_range(_Rg&& __rg, bool __is_sorted = false)
{
auto __guard = _M_make_clear_guard();
typename container_type::iterator __it;
if constexpr (requires { _M_cont.insert_range(_M_cont.end(), __rg); })
__it = _M_cont.insert_range(_M_cont.end(), __rg);
else if constexpr (ranges::common_range<_Rg>
&& __has_input_iter_cat<ranges::iterator_t<_Rg>>)
__it = _M_cont.insert(_M_cont.end(), ranges::begin(__rg), ranges::end(__rg));
else
{
size_type __n = size();
auto __first = ranges::begin(__rg);
auto __last = ranges::end(__rg);
for (; __first != __last; ++__first)
_M_cont.emplace_back(*__first);
__it = _M_cont.begin() + __n;
}
if (__is_sorted)
_GLIBCXX_DEBUG_ASSERT(ranges::is_sorted(__it, _M_cont.end(), _M_comp));
else
std::sort(__it, _M_cont.end(), _M_comp);
std::inplace_merge(_M_cont.begin(), __it, _M_cont.end(), _M_comp);
if constexpr (!_Multi)
_M_unique();
__guard._M_disable();
}
template<__detail::__container_compatible_range<value_type> _Rg>
_GLIBCXX26_CONSTEXPR
void
insert_range(_Rg&& __rg)
{ _M_insert_range(std::forward<_Rg>(__rg)); }
template<__detail::__container_compatible_range<value_type> _Rg>
_GLIBCXX26_CONSTEXPR
void
insert_range(__sorted_t, _Rg&& __rg)
{ _M_insert_range(std::forward<_Rg>(__rg), true); }
_GLIBCXX26_CONSTEXPR
void
insert(initializer_list<value_type> __il)
{ insert(__il.begin(), __il.end()); }
_GLIBCXX26_CONSTEXPR
void
insert(__sorted_t __s, initializer_list<value_type> __il)
{ insert(__s, __il.begin(), __il.end()); }
_GLIBCXX26_CONSTEXPR
container_type
extract() &&
{
auto __guard = _M_make_clear_guard();
return std::move(_M_cont);
}
_GLIBCXX26_CONSTEXPR
void
replace(container_type&& __cont)
{
_GLIBCXX_DEBUG_ASSERT(ranges::is_sorted(__cont, _M_comp));
auto __guard = _M_make_clear_guard();
_M_cont = std::move(__cont);
__guard._M_disable();
}
_GLIBCXX26_CONSTEXPR
iterator
erase(const_iterator __position)
{ return _M_cont.erase(__position); }
_GLIBCXX26_CONSTEXPR
size_type
erase(const key_type& __x)
{ return erase<const key_type&>(__x); }
template<typename _Key2>
requires same_as<remove_cvref_t<_Key2>, _Key>
|| (__transparent_comparator<_Compare>
&& !is_convertible_v<_Key2, iterator>
&& !is_convertible_v<_Key2, const_iterator>)
_GLIBCXX26_CONSTEXPR
size_type
erase(_Key2&& __x)
{
auto [__first, __last] = equal_range(std::forward<_Key2>(__x));
auto __n = __last - __first;
erase(__first, __last);
return __n;
}
_GLIBCXX26_CONSTEXPR
iterator
erase(const_iterator __first, const_iterator __last)
{ return _M_cont.erase(__first, __last); }
_GLIBCXX26_CONSTEXPR
void
swap(_Derived& __y)
noexcept(is_nothrow_swappable_v<container_type>
&& is_nothrow_swappable_v<key_compare>)
{
auto __guard = _M_make_clear_guard();
auto __guard_y = _ClearGuard{__y._M_cont};
ranges::swap(_M_cont, __y._M_cont);
ranges::swap(_M_comp, __y._M_comp);
__guard._M_disable();
__guard_y._M_disable();
}
_GLIBCXX26_CONSTEXPR
void
clear() noexcept
{ _M_cont.clear(); }
// observers
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
key_compare
key_comp() const
{ return _M_comp; }
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
value_compare
value_comp() const
{ return _M_comp; }
// set operations
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
iterator
find(const key_type& __x)
{ return find<key_type>(__x); }
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
const_iterator
find(const key_type& __x) const
{ return find<key_type>(__x); }
template<typename _Key2>
requires same_as<_Key2, _Key> || __transparent_comparator<_Compare>
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
iterator
find(const _Key2& __x)
{
auto __it = lower_bound(__x);
if (__it != end() && !_M_comp(__x, *__it))
return __it;
else
return end();
}
template<typename _Key2>
requires same_as<_Key2, _Key> || __transparent_comparator<_Compare>
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
const_iterator
find(const _Key2& __x) const
{
auto __it = lower_bound(__x);
if (__it != cend() && !_M_comp(__x, *__it))
return __it;
else
return cend();
}
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
size_type
count(const key_type& __x) const
{ return count<key_type>(__x); }
template<typename _Key2>
requires same_as<_Key2, _Key> || __transparent_comparator<_Compare>
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
size_type
count(const _Key2& __x) const
{
if constexpr (!_Multi)
return contains<_Key2>(__x);
else
{
auto [__first, __last] = equal_range(__x);
return __last - __first;
}
}
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
bool
contains(const key_type& __x) const
{ return contains<key_type>(__x); }
template<typename _Key2>
requires same_as<_Key2, _Key> || __transparent_comparator<_Compare>
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
bool
contains(const _Key2& __x) const
{ return find(__x) != cend(); }
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
iterator
lower_bound(const key_type& __x)
{ return lower_bound<key_type>(__x); }
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
const_iterator
lower_bound(const key_type& __x) const
{ return lower_bound<key_type>(__x); }
template<typename _Key2>
requires same_as<_Key2, _Key> || __transparent_comparator<_Compare>
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
iterator
lower_bound(const _Key2& __x)
{ return std::lower_bound(begin(), end(), __x, _M_comp); }
template<typename _Key2>
requires same_as<_Key2, _Key> || __transparent_comparator<_Compare>
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
const_iterator
lower_bound(const _Key2& __x) const
{ return std::lower_bound(begin(), end(), __x, _M_comp); }
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
iterator
upper_bound(const key_type& __x)
{ return upper_bound<key_type>(__x); }
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
const_iterator
upper_bound(const key_type& __x) const
{ return upper_bound<key_type>(__x); }
template<typename _Key2>
requires same_as<_Key2, _Key> || __transparent_comparator<_Compare>
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
iterator
upper_bound(const _Key2& __x)
{ return std::upper_bound(begin(), end(), __x, _M_comp); }
template<typename _Key2>
requires same_as<_Key2, _Key> || __transparent_comparator<_Compare>
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
const_iterator
upper_bound(const _Key2& __x) const
{ return std::upper_bound(begin(), end(), __x, _M_comp); }
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
pair<iterator, iterator>
equal_range(const key_type& __x)
{ return equal_range<key_type>(__x); }
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
pair<const_iterator, const_iterator>
equal_range(const key_type& __x) const
{ return equal_range<key_type>(__x); }
template<typename _Key2>
requires same_as<_Key2, _Key> || __transparent_comparator<_Compare>
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
pair<iterator, iterator>
equal_range(const _Key2& __x)
{ return std::equal_range(begin(), end(), __x, _M_comp); }
template<typename _Key2>
requires same_as<_Key2, _Key> || __transparent_comparator<_Compare>
[[nodiscard]]
_GLIBCXX26_CONSTEXPR
pair<const_iterator, const_iterator>
equal_range(const _Key2& __x) const
{ return std::equal_range(begin(), end(), __x, _M_comp); }
[[nodiscard]]
friend _GLIBCXX26_CONSTEXPR bool
operator==(const _Derived& __x, const _Derived& __y)
{ return std::equal(__x.begin(), __x.end(), __y.begin(), __y.end()); }
template<typename _Up = value_type>
[[nodiscard]]
friend _GLIBCXX26_CONSTEXPR __detail::__synth3way_t<_Up>
operator<=>(const _Derived& __x, const _Derived& __y)
{
return std::lexicographical_compare_three_way(__x.begin(), __x.end(),
__y.begin(), __y.end(),
__detail::__synth3way);
}
friend _GLIBCXX26_CONSTEXPR void
swap(_Derived& __x, _Derived& __y) noexcept(noexcept(__x.swap(__y)))
{ return __x.swap(__y); }
template<typename _Predicate>
_GLIBCXX26_CONSTEXPR
size_type
_M_erase_if(_Predicate __pred)
{
auto __guard = _M_make_clear_guard();
auto __first = _M_cont.begin();
auto __last = _M_cont.end();
__first = std::remove_if(__first, __last, __pred);
auto __n = __last - __first;
erase(__first, __last);
__guard._M_disable();
return __n;
}
private:
container_type _M_cont;
[[no_unique_address]] _Compare _M_comp;
_GLIBCXX26_CONSTEXPR
void
_M_sort_uniq()
{
std::sort(_M_cont.begin(), _M_cont.end(), _M_comp);
if constexpr (!_Multi)
_M_unique();
}
_GLIBCXX26_CONSTEXPR
void
_M_unique() requires (!_Multi)
{
struct __key_equiv
{
_GLIBCXX26_CONSTEXPR
__key_equiv(key_compare __c) : _M_comp(__c) { }
_GLIBCXX26_CONSTEXPR
bool
operator()(const_reference __x, const_reference __y) const
{ return !_M_comp(__x, __y) && !_M_comp(__y, __x); }
[[no_unique_address]] key_compare _M_comp;
};
auto __first = _M_cont.begin();
auto __last = _M_cont.end();
__first = std::unique(__first, __last, __key_equiv(_M_comp));
_M_cont.erase(__first, __last);
}
};
/* Class template flat_set - container adaptor
*
* @ingroup
*/
template<typename _Key, typename _Compare = less<_Key>,
typename _KeyContainer = vector<_Key>>
class flat_set
: private _Flat_set_impl<_Key, _Compare, _KeyContainer, false>
{
using _Impl = _Flat_set_impl<_Key, _Compare, _KeyContainer, false>;
friend _Impl;
public:
// types
using typename _Impl::key_type;
using typename _Impl::value_type;
using typename _Impl::key_compare;
using typename _Impl::reference;
using typename _Impl::const_reference;
using typename _Impl::size_type;
using typename _Impl::difference_type;
using typename _Impl::iterator;
using typename _Impl::const_iterator;
using typename _Impl::reverse_iterator;
using typename _Impl::const_reverse_iterator;
using typename _Impl::container_type;
using typename _Impl::value_compare;
// constructors
using _Impl::_Impl;
// operator=(initializer_list<value_type>)
// Although this also brings in the base move/copy assignment operators,
// they will be hidden by our synthesized ones.
using _Impl::operator=;
// iterators
using _Impl::begin;
using _Impl::end;
using _Impl::rbegin;
using _Impl::rend;
using _Impl::cbegin;
using _Impl::cend;
using _Impl::crbegin;
using _Impl::crend;
// capacity
using _Impl::empty;
using _Impl::size;
using _Impl::max_size;
// modifiers
using _Impl::emplace;
using _Impl::emplace_hint;
using _Impl::insert;
using _Impl::insert_range;
using _Impl::extract;
using _Impl::replace;
using _Impl::erase;
using _Impl::swap;
using _Impl::clear;
// observers
using _Impl::key_comp;
using _Impl::value_comp;
// set operations
using _Impl::find;
using _Impl::count;
using _Impl::contains;
using _Impl::lower_bound;
using _Impl::upper_bound;
using _Impl::equal_range;
using _Impl::_M_erase_if;
};
template<typename _KeyContainer,
__not_allocator_like _Compare = less<typename _KeyContainer::value_type>>
flat_set(_KeyContainer, _Compare = _Compare())
-> flat_set<typename _KeyContainer::value_type, _Compare, _KeyContainer>;
template<typename _KeyContainer, __allocator_for<_KeyContainer> _Alloc>
flat_set(_KeyContainer, _Alloc)
-> flat_set<typename _KeyContainer::value_type,
less<typename _KeyContainer::value_type>, _KeyContainer>;
template<typename _KeyContainer, __not_allocator_like _Compare,
__allocator_for<_KeyContainer> _Alloc>
flat_set(_KeyContainer, _Compare, _Alloc)
-> flat_set<typename _KeyContainer::value_type, _Compare, _KeyContainer>;
template<typename _KeyContainer,
__not_allocator_like _Compare = less<typename _KeyContainer::value_type>>
flat_set(sorted_unique_t, _KeyContainer, _Compare = _Compare())
-> flat_set<typename _KeyContainer::value_type, _Compare, _KeyContainer>;
template<typename _KeyContainer, __allocator_for<_KeyContainer> _Alloc>
flat_set(sorted_unique_t, _KeyContainer, _Alloc)
-> flat_set<typename _KeyContainer::value_type,
less<typename _KeyContainer::value_type>, _KeyContainer>;
template<typename _KeyContainer, __not_allocator_like _Compare,
__allocator_for<_KeyContainer> _Alloc>
flat_set(sorted_unique_t, _KeyContainer, _Compare, _Alloc)
-> flat_set<typename _KeyContainer::value_type, _Compare, _KeyContainer>;
template<__has_input_iter_cat _InputIterator,
__not_allocator_like _Compare = less<__iter_key_t<_InputIterator>>>
flat_set(_InputIterator, _InputIterator, _Compare = _Compare())
-> flat_set<__iter_key_t<_InputIterator>, __iter_val_t<_InputIterator>, _Compare>;
template<__has_input_iter_cat _InputIterator,
__not_allocator_like _Compare = less<__iter_key_t<_InputIterator>>>
flat_set(sorted_unique_t, _InputIterator, _InputIterator, _Compare = _Compare())
-> flat_set<__iter_key_t<_InputIterator>, __iter_val_t<_InputIterator>, _Compare>;
template<ranges::input_range _Rg,
__not_allocator_like _Compare = less<ranges::range_value_t<_Rg>>,
__allocator_like _Alloc = allocator<ranges::range_value_t<_Rg>>>
flat_set(from_range_t, _Rg&&, _Compare = _Compare(), _Alloc = _Alloc())
-> flat_set<ranges::range_value_t<_Rg>, _Compare,
vector<ranges::range_value_t<_Rg>,
__alloc_rebind<_Alloc, ranges::range_value_t<_Rg>>>>;
template<ranges::input_range _Rg, __allocator_like _Alloc>
flat_set(from_range_t, _Rg&&, _Alloc)
-> flat_set<ranges::range_value_t<_Rg>, less<ranges::range_value_t<_Rg>>,
vector<ranges::range_value_t<_Rg>,
__alloc_rebind<_Alloc, ranges::range_value_t<_Rg>>>>;
template<typename _Key, __not_allocator_like _Compare = less<_Key>>
flat_set(initializer_list<_Key>, _Compare = _Compare())
-> flat_set<_Key, _Compare>;
template<typename _Key, __not_allocator_like _Compare = less<_Key>>
flat_set(sorted_unique_t, initializer_list<_Key>, _Compare = _Compare())
-> flat_set<_Key, _Compare>;
template<typename _Key, typename _Compare,
typename _KeyContainer, typename _Alloc>
struct uses_allocator<flat_set<_Key, _Compare, _KeyContainer>, _Alloc>
: bool_constant<uses_allocator_v<_KeyContainer, _Alloc>>
{ };
template<typename _Key, typename _Compare, typename _KeyContainer,
typename _Predicate>
_GLIBCXX26_CONSTEXPR
typename flat_set<_Key, _Compare, _KeyContainer>::size_type
erase_if(flat_set<_Key, _Compare, _KeyContainer>& __c, _Predicate __pred)
{ return __c._M_erase_if(std::move(__pred)); }
/* Class template flat_multiset - container adaptor
*
* @ingroup
*/
template<typename _Key, typename _Compare = less<_Key>,
typename _KeyContainer = vector<_Key>>
class flat_multiset
: private _Flat_set_impl<_Key, _Compare, _KeyContainer, true>
{
using _Impl = _Flat_set_impl<_Key, _Compare, _KeyContainer, true>;
friend _Impl;
public:
// types
using typename _Impl::key_type;
using typename _Impl::value_type;
using typename _Impl::key_compare;
using typename _Impl::reference;
using typename _Impl::const_reference;
using typename _Impl::size_type;
using typename _Impl::difference_type;
using typename _Impl::iterator;
using typename _Impl::const_iterator;
using typename _Impl::reverse_iterator;
using typename _Impl::const_reverse_iterator;
using typename _Impl::container_type;
using typename _Impl::value_compare;
// constructors
using _Impl::_Impl;
// operator=(initializer_list<value_type>)
// Although this also brings in the base move/copy assignment operators,
// they will be hidden by our synthesized ones.
using _Impl::operator=;
// iterators
using _Impl::begin;
using _Impl::end;
using _Impl::rbegin;
using _Impl::rend;
using _Impl::cbegin;
using _Impl::cend;
using _Impl::crbegin;
using _Impl::crend;
// capacity
using _Impl::empty;
using _Impl::size;
using _Impl::max_size;
// modifiers
using _Impl::emplace;
using _Impl::emplace_hint;
using _Impl::insert;
using _Impl::insert_range;
using _Impl::extract;
using _Impl::replace;
using _Impl::erase;
using _Impl::swap;
using _Impl::clear;
// observers
using _Impl::key_comp;
using _Impl::value_comp;
// set operations
using _Impl::find;
using _Impl::count;
using _Impl::contains;
using _Impl::lower_bound;
using _Impl::upper_bound;
using _Impl::equal_range;
using _Impl::_M_erase_if;
};
template<typename _KeyContainer,
__not_allocator_like _Compare = less<typename _KeyContainer::value_type>>
flat_multiset(_KeyContainer, _Compare = _Compare())
-> flat_multiset<typename _KeyContainer::value_type, _Compare, _KeyContainer>;
template<typename _KeyContainer, __allocator_for<_KeyContainer> _Alloc>
flat_multiset(_KeyContainer, _Alloc)
-> flat_multiset<typename _KeyContainer::value_type,
less<typename _KeyContainer::value_type>, _KeyContainer>;
template<typename _KeyContainer, __not_allocator_like _Compare,
__allocator_for<_KeyContainer> _Alloc>
flat_multiset(_KeyContainer, _Compare, _Alloc)
-> flat_multiset<typename _KeyContainer::value_type, _Compare, _KeyContainer>;
template<typename _KeyContainer,
__not_allocator_like _Compare = less<typename _KeyContainer::value_type>>
flat_multiset(sorted_equivalent_t, _KeyContainer, _Compare = _Compare())
-> flat_multiset<typename _KeyContainer::value_type, _Compare, _KeyContainer>;
template<typename _KeyContainer, __allocator_for<_KeyContainer> _Alloc>
flat_multiset(sorted_equivalent_t, _KeyContainer, _Alloc)
-> flat_multiset<typename _KeyContainer::value_type,
less<typename _KeyContainer::value_type>, _KeyContainer>;
template<typename _KeyContainer, __not_allocator_like _Compare,
__allocator_for<_KeyContainer> _Alloc>
flat_multiset(sorted_equivalent_t, _KeyContainer, _Compare, _Alloc)
-> flat_multiset<typename _KeyContainer::value_type, _Compare, _KeyContainer>;
template<__has_input_iter_cat _InputIterator,
__not_allocator_like _Compare = less<__iter_key_t<_InputIterator>>>
flat_multiset(_InputIterator, _InputIterator, _Compare = _Compare())
-> flat_multiset<__iter_key_t<_InputIterator>, __iter_val_t<_InputIterator>, _Compare>;
template<__has_input_iter_cat _InputIterator,
__not_allocator_like _Compare = less<__iter_key_t<_InputIterator>>>
flat_multiset(sorted_equivalent_t, _InputIterator, _InputIterator, _Compare = _Compare())
-> flat_multiset<__iter_key_t<_InputIterator>, __iter_val_t<_InputIterator>, _Compare>;
template<ranges::input_range _Rg,
__not_allocator_like _Compare = less<ranges::range_value_t<_Rg>>,
__allocator_like _Alloc = allocator<ranges::range_value_t<_Rg>>>
flat_multiset(from_range_t, _Rg&&, _Compare = _Compare(), _Alloc = _Alloc())
-> flat_multiset<ranges::range_value_t<_Rg>, _Compare,
vector<ranges::range_value_t<_Rg>,
__alloc_rebind<_Alloc, ranges::range_value_t<_Rg>>>>;
template<ranges::input_range _Rg, __allocator_like _Alloc>
flat_multiset(from_range_t, _Rg&&, _Alloc)
-> flat_multiset<ranges::range_value_t<_Rg>, less<ranges::range_value_t<_Rg>>,
vector<ranges::range_value_t<_Rg>,
__alloc_rebind<_Alloc, ranges::range_value_t<_Rg>>>>;
template<typename _Key, __not_allocator_like _Compare = less<_Key>>
flat_multiset(initializer_list<_Key>, _Compare = _Compare())
-> flat_multiset<_Key, _Compare>;
template<typename _Key, __not_allocator_like _Compare = less<_Key>>
flat_multiset(sorted_equivalent_t, initializer_list<_Key>, _Compare = _Compare())
-> flat_multiset<_Key, _Compare>;
template<typename _Key, typename _Compare,
typename _KeyContainer, typename _Alloc>
struct uses_allocator<flat_multiset<_Key, _Compare, _KeyContainer>, _Alloc>
: bool_constant<uses_allocator_v<_KeyContainer, _Alloc>>
{ };
template<typename _Key, typename _Compare, typename _KeyContainer,
typename _Predicate>
_GLIBCXX26_CONSTEXPR
typename flat_multiset<_Key, _Compare, _KeyContainer>::size_type
erase_if(flat_multiset<_Key, _Compare, _KeyContainer>& __c, _Predicate __pred)
{ return __c._M_erase_if(std::move(__pred)); }
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#endif // __cpp_lib_flat_set
#endif // _GLIBCXX_FLAT_SET
compare
exception
initializer_list
functional
optional
type_traits
vector
stl_algo.h
uses_allocator_args.h
ranges_algo.h
version.h
stl_function.h
stl_pair.h
std::move
constexpr std::remove_reference< _Tp >::type && move(_Tp &&__t) noexcept
Convert a value to an rvalue.
Definition move.h:138
std::__addressof
constexpr _Tp * __addressof(_Tp &__r) noexcept
Same as C++11 std::addressof.
Definition move.h:52
std::forward
constexpr _Tp && forward(typename std::remove_reference< _Tp >::type &__t) noexcept
Forward an lvalue.
Definition move.h:72
std::lexicographical_compare_three_way
constexpr auto lexicographical_compare_three_way(_InputIter1 __first1, _InputIter1 __last1, _InputIter2 __first2, _InputIter2 __last2, _Comp __comp) -> decltype(__comp(*__first1, *__first2))
Performs dictionary comparison on ranges.
Definition stl_algobase.h:1867
std::make_reverse_iterator
constexpr reverse_iterator< _Iterator > make_reverse_iterator(_Iterator __i)
Generator function for reverse_iterator.
Definition bits/stl_iterator.h:647
std
ISO C++ entities toplevel namespace is std.
std::initializer_list
initializer_list
Definition initializer_list:48
std::allocator
The standard allocator, as per C++03 [20.4.1].
Definition allocator.h:134
std::uses_allocator
Declare uses_allocator so it can be specialized in <queue> etc.
Definition memoryfwd.h:76
std::less
One of the comparison functors.
Definition stl_function.h:404
std::vector
A standard container which offers fixed time access to individual elements in any order.
Definition stl_vector.h:461
std::ranges::input_range
A range for which ranges::begin returns an input iterator.
Definition ranges_base.h:599