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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP_DEQUE
#define _LIBCPP_DEQUE
/*
deque synopsis
namespace std
{
template <class T, class Allocator = allocator<T> >
class deque
{
public:
// types:
typedef T value_type;
typedef Allocator allocator_type;
typedef typename allocator_type::reference reference;
typedef typename allocator_type::const_reference const_reference;
typedef implementation-defined iterator;
typedef implementation-defined const_iterator;
typedef typename allocator_type::size_type size_type;
typedef typename allocator_type::difference_type difference_type;
typedef typename allocator_type::pointer pointer;
typedef typename allocator_type::const_pointer const_pointer;
typedef std::reverse_iterator<iterator> reverse_iterator;
typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
// construct/copy/destroy:
deque() noexcept(is_nothrow_default_constructible<allocator_type>::value);
explicit deque(const allocator_type& a);
explicit deque(size_type n);
explicit deque(size_type n, const allocator_type& a); // C++14
deque(size_type n, const value_type& v);
deque(size_type n, const value_type& v, const allocator_type& a);
template <class InputIterator>
deque(InputIterator f, InputIterator l);
template <class InputIterator>
deque(InputIterator f, InputIterator l, const allocator_type& a);
deque(const deque& c);
deque(deque&& c)
noexcept(is_nothrow_move_constructible<allocator_type>::value);
deque(initializer_list<value_type> il, const Allocator& a = allocator_type());
deque(const deque& c, const allocator_type& a);
deque(deque&& c, const allocator_type& a);
~deque();
deque& operator=(const deque& c);
deque& operator=(deque&& c)
noexcept(
allocator_type::propagate_on_container_move_assignment::value &&
is_nothrow_move_assignable<allocator_type>::value);
deque& operator=(initializer_list<value_type> il);
template <class InputIterator>
void assign(InputIterator f, InputIterator l);
void assign(size_type n, const value_type& v);
void assign(initializer_list<value_type> il);
allocator_type get_allocator() const noexcept;
// iterators:
iterator begin() noexcept;
const_iterator begin() const noexcept;
iterator end() noexcept;
const_iterator end() const noexcept;
reverse_iterator rbegin() noexcept;
const_reverse_iterator rbegin() const noexcept;
reverse_iterator rend() noexcept;
const_reverse_iterator rend() const noexcept;
const_iterator cbegin() const noexcept;
const_iterator cend() const noexcept;
const_reverse_iterator crbegin() const noexcept;
const_reverse_iterator crend() const noexcept;
// capacity:
size_type size() const noexcept;
size_type max_size() const noexcept;
void resize(size_type n);
void resize(size_type n, const value_type& v);
void shrink_to_fit();
bool empty() const noexcept;
// element access:
reference operator[](size_type i);
const_reference operator[](size_type i) const;
reference at(size_type i);
const_reference at(size_type i) const;
reference front();
const_reference front() const;
reference back();
const_reference back() const;
// modifiers:
void push_front(const value_type& v);
void push_front(value_type&& v);
void push_back(const value_type& v);
void push_back(value_type&& v);
template <class... Args> reference emplace_front(Args&&... args); // reference in C++17
template <class... Args> reference emplace_back(Args&&... args); // reference in C++17
template <class... Args> iterator emplace(const_iterator p, Args&&... args);
iterator insert(const_iterator p, const value_type& v);
iterator insert(const_iterator p, value_type&& v);
iterator insert(const_iterator p, size_type n, const value_type& v);
template <class InputIterator>
iterator insert(const_iterator p, InputIterator f, InputIterator l);
iterator insert(const_iterator p, initializer_list<value_type> il);
void pop_front();
void pop_back();
iterator erase(const_iterator p);
iterator erase(const_iterator f, const_iterator l);
void swap(deque& c)
noexcept(allocator_traits<allocator_type>::is_always_equal::value); // C++17
void clear() noexcept;
};
template <class InputIterator, class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>>
deque(InputIterator, InputIterator, Allocator = Allocator())
-> deque<typename iterator_traits<InputIterator>::value_type, Allocator>; // C++17
template <class T, class Allocator>
bool operator==(const deque<T,Allocator>& x, const deque<T,Allocator>& y);
template <class T, class Allocator>
bool operator< (const deque<T,Allocator>& x, const deque<T,Allocator>& y); // removed in C++20
template <class T, class Allocator>
bool operator!=(const deque<T,Allocator>& x, const deque<T,Allocator>& y); // removed in C++20
template <class T, class Allocator>
bool operator> (const deque<T,Allocator>& x, const deque<T,Allocator>& y); // removed in C++20
template <class T, class Allocator>
bool operator>=(const deque<T,Allocator>& x, const deque<T,Allocator>& y); // removed in C++20
template <class T, class Allocator>
bool operator<=(const deque<T,Allocator>& x, const deque<T,Allocator>& y); // removed in C++20
template<class T, class Allocator>
synth-three-way-result<T> operator<=>(const deque<T, Allocator>& x,
const deque<T, Allocator>& y); // since C++20
// specialized algorithms:
template <class T, class Allocator>
void swap(deque<T,Allocator>& x, deque<T,Allocator>& y)
noexcept(noexcept(x.swap(y)));
template <class T, class Allocator, class U>
typename deque<T, Allocator>::size_type
erase(deque<T, Allocator>& c, const U& value); // C++20
template <class T, class Allocator, class Predicate>
typename deque<T, Allocator>::size_type
erase_if(deque<T, Allocator>& c, Predicate pred); // C++20
} // std
*/
#include <__algorithm/copy.h>
#include <__algorithm/copy_backward.h>
#include <__algorithm/equal.h>
#include <__algorithm/fill_n.h>
#include <__algorithm/lexicographical_compare.h>
#include <__algorithm/lexicographical_compare_three_way.h>
#include <__algorithm/min.h>
#include <__algorithm/remove.h>
#include <__algorithm/remove_if.h>
#include <__algorithm/unwrap_iter.h>
#include <__assert> // all public C++ headers provide the assertion handler
#include <__config>
#include <__format/enable_insertable.h>
#include <__iterator/iterator_traits.h>
#include <__iterator/next.h>
#include <__iterator/prev.h>
#include <__iterator/reverse_iterator.h>
#include <__iterator/segmented_iterator.h>
#include <__memory/addressof.h>
#include <__memory/allocator_destructor.h>
#include <__memory/pointer_traits.h>
#include <__memory/temp_value.h>
#include <__memory/unique_ptr.h>
#include <__memory_resource/polymorphic_allocator.h>
#include <__split_buffer>
#include <__type_traits/is_allocator.h>
#include <__type_traits/is_convertible.h>
#include <__type_traits/is_same.h>
#include <__type_traits/type_identity.h>
#include <__utility/forward.h>
#include <__utility/move.h>
#include <__utility/swap.h>
#include <limits>
#include <stdexcept>
#include <version>
// standard-mandated includes
// [iterator.range]
#include <__iterator/access.h>
#include <__iterator/data.h>
#include <__iterator/empty.h>
#include <__iterator/reverse_access.h>
#include <__iterator/size.h>
// [deque.syn]
#include <compare>
#include <initializer_list>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_PUSH_MACROS
#include <__undef_macros>
_LIBCPP_BEGIN_NAMESPACE_STD
template <class _Tp, class _Allocator = allocator<_Tp> > class _LIBCPP_TEMPLATE_VIS deque;
template <class _ValueType, class _DiffType>
struct __deque_block_size {
static const _DiffType value = sizeof(_ValueType) < 256 ? 4096 / sizeof(_ValueType) : 16;
};
template <class _ValueType, class _Pointer, class _Reference, class _MapPointer,
class _DiffType, _DiffType _BS =
#ifdef _LIBCPP_ABI_INCOMPLETE_TYPES_IN_DEQUE
// Keep template parameter to avoid changing all template declarations thoughout
// this file.
0
#else
__deque_block_size<_ValueType, _DiffType>::value
#endif
>
class _LIBCPP_TEMPLATE_VIS __deque_iterator
{
typedef _MapPointer __map_iterator;
public:
typedef _Pointer pointer;
typedef _DiffType difference_type;
private:
__map_iterator __m_iter_;
pointer __ptr_;
static const difference_type __block_size;
public:
typedef _ValueType value_type;
typedef random_access_iterator_tag iterator_category;
typedef _Reference reference;
_LIBCPP_HIDE_FROM_ABI __deque_iterator() _NOEXCEPT
#if _LIBCPP_STD_VER >= 14
: __m_iter_(nullptr), __ptr_(nullptr)
#endif
{}
template <class _Pp, class _Rp, class _MP>
_LIBCPP_HIDE_FROM_ABI
__deque_iterator(const __deque_iterator<value_type, _Pp, _Rp, _MP, difference_type, _BS>& __it,
typename enable_if<is_convertible<_Pp, pointer>::value>::type* = 0) _NOEXCEPT
: __m_iter_(__it.__m_iter_), __ptr_(__it.__ptr_) {}
_LIBCPP_HIDE_FROM_ABI reference operator*() const {return *__ptr_;}
_LIBCPP_HIDE_FROM_ABI pointer operator->() const {return __ptr_;}
_LIBCPP_HIDE_FROM_ABI __deque_iterator& operator++()
{
if (++__ptr_ - *__m_iter_ == __block_size)
{
++__m_iter_;
__ptr_ = *__m_iter_;
}
return *this;
}
_LIBCPP_HIDE_FROM_ABI __deque_iterator operator++(int)
{
__deque_iterator __tmp = *this;
++(*this);
return __tmp;
}
_LIBCPP_HIDE_FROM_ABI __deque_iterator& operator--()
{
if (__ptr_ == *__m_iter_)
{
--__m_iter_;
__ptr_ = *__m_iter_ + __block_size;
}
--__ptr_;
return *this;
}
_LIBCPP_HIDE_FROM_ABI __deque_iterator operator--(int)
{
__deque_iterator __tmp = *this;
--(*this);
return __tmp;
}
_LIBCPP_HIDE_FROM_ABI __deque_iterator& operator+=(difference_type __n)
{
if (__n != 0)
{
__n += __ptr_ - *__m_iter_;
if (__n > 0)
{
__m_iter_ += __n / __block_size;
__ptr_ = *__m_iter_ + __n % __block_size;
}
else // (__n < 0)
{
difference_type __z = __block_size - 1 - __n;
__m_iter_ -= __z / __block_size;
__ptr_ = *__m_iter_ + (__block_size - 1 - __z % __block_size);
}
}
return *this;
}
_LIBCPP_HIDE_FROM_ABI __deque_iterator& operator-=(difference_type __n)
{
return *this += -__n;
}
_LIBCPP_HIDE_FROM_ABI __deque_iterator operator+(difference_type __n) const
{
__deque_iterator __t(*this);
__t += __n;
return __t;
}
_LIBCPP_HIDE_FROM_ABI __deque_iterator operator-(difference_type __n) const
{
__deque_iterator __t(*this);
__t -= __n;
return __t;
}
_LIBCPP_HIDE_FROM_ABI
friend __deque_iterator operator+(difference_type __n, const __deque_iterator& __it)
{return __it + __n;}
_LIBCPP_HIDE_FROM_ABI
friend difference_type operator-(const __deque_iterator& __x, const __deque_iterator& __y)
{
if (__x != __y)
return (__x.__m_iter_ - __y.__m_iter_) * __block_size
+ (__x.__ptr_ - *__x.__m_iter_)
- (__y.__ptr_ - *__y.__m_iter_);
return 0;
}
_LIBCPP_HIDE_FROM_ABI reference operator[](difference_type __n) const
{return *(*this + __n);}
_LIBCPP_HIDE_FROM_ABI friend
bool operator==(const __deque_iterator& __x, const __deque_iterator& __y)
{return __x.__ptr_ == __y.__ptr_;}
_LIBCPP_HIDE_FROM_ABI friend
bool operator!=(const __deque_iterator& __x, const __deque_iterator& __y)
{return !(__x == __y);}
_LIBCPP_HIDE_FROM_ABI friend
bool operator<(const __deque_iterator& __x, const __deque_iterator& __y)
{return __x.__m_iter_ < __y.__m_iter_ ||
(__x.__m_iter_ == __y.__m_iter_ && __x.__ptr_ < __y.__ptr_);}
_LIBCPP_HIDE_FROM_ABI friend
bool operator>(const __deque_iterator& __x, const __deque_iterator& __y)
{return __y < __x;}
_LIBCPP_HIDE_FROM_ABI friend
bool operator<=(const __deque_iterator& __x, const __deque_iterator& __y)
{return !(__y < __x);}
_LIBCPP_HIDE_FROM_ABI friend
bool operator>=(const __deque_iterator& __x, const __deque_iterator& __y)
{return !(__x < __y);}
private:
_LIBCPP_HIDE_FROM_ABI explicit __deque_iterator(__map_iterator __m, pointer __p) _NOEXCEPT
: __m_iter_(__m), __ptr_(__p) {}
template <class _Tp, class _Ap> friend class _LIBCPP_TEMPLATE_VIS deque;
template <class _Vp, class _Pp, class _Rp, class _MP, class _Dp, _Dp>
friend class _LIBCPP_TEMPLATE_VIS __deque_iterator;
template <class>
friend struct __segmented_iterator_traits;
};
template <class _ValueType, class _Pointer, class _Reference, class _MapPointer, class _DiffType, _DiffType _BlockSize>
struct __segmented_iterator_traits<
__deque_iterator<_ValueType, _Pointer, _Reference, _MapPointer, _DiffType, _BlockSize> > {
private:
using _Iterator = __deque_iterator<_ValueType, _Pointer, _Reference, _MapPointer, _DiffType, _BlockSize>;
public:
using __is_segmented_iterator = true_type;
using __segment_iterator = _MapPointer;
using __local_iterator = _Pointer;
static _LIBCPP_HIDE_FROM_ABI __segment_iterator __segment(_Iterator __iter) { return __iter.__m_iter_; }
static _LIBCPP_HIDE_FROM_ABI __local_iterator __local(_Iterator __iter) { return __iter.__ptr_; }
static _LIBCPP_HIDE_FROM_ABI __local_iterator __begin(__segment_iterator __iter) { return *__iter; }
static _LIBCPP_HIDE_FROM_ABI __local_iterator __end(__segment_iterator __iter) {
return *__iter + _Iterator::__block_size;
}
static _LIBCPP_HIDE_FROM_ABI _Iterator __compose(__segment_iterator __segment, __local_iterator __local) {
if (__local == __end(__segment)) {
++__segment;
return _Iterator(__segment, *__segment);
}
return _Iterator(__segment, __local);
}
};
template <class _ValueType, class _Pointer, class _Reference, class _MapPointer,
class _DiffType, _DiffType _BlockSize>
const _DiffType __deque_iterator<_ValueType, _Pointer, _Reference, _MapPointer,
_DiffType, _BlockSize>::__block_size =
__deque_block_size<_ValueType, _DiffType>::value;
template <class _Tp, class _Allocator /*= allocator<_Tp>*/>
class _LIBCPP_TEMPLATE_VIS deque
{
public:
// types:
using value_type = _Tp;
static_assert((is_same<typename _Allocator::value_type, value_type>::value),
"Allocator::value_type must be same type as value_type");
using allocator_type = _Allocator;
using __alloc_traits = allocator_traits<allocator_type>;
using size_type = typename __alloc_traits::size_type;
using difference_type = typename __alloc_traits::difference_type;
using pointer = typename __alloc_traits::pointer;
using const_pointer = typename __alloc_traits::const_pointer;
using __pointer_allocator = __rebind_alloc<__alloc_traits, pointer>;
using __const_pointer_allocator = __rebind_alloc<__alloc_traits, const_pointer>;
using __map = __split_buffer<pointer, __pointer_allocator>;
using __map_alloc_traits = allocator_traits<__pointer_allocator>;
using __map_pointer = typename __map_alloc_traits::pointer;
using __map_const_pointer = typename allocator_traits<__const_pointer_allocator>::const_pointer;
using reference = value_type&;
using const_reference = const value_type&;
using iterator = __deque_iterator<value_type, pointer, reference, __map_pointer, difference_type>;
using const_iterator =
__deque_iterator<value_type, const_pointer, const_reference, __map_const_pointer, difference_type>;
using reverse_iterator = std::reverse_iterator<iterator>;
using const_reverse_iterator = std::reverse_iterator<const_iterator>;
static_assert(is_same<allocator_type, __rebind_alloc<__alloc_traits, value_type> >::value,
"[allocator.requirements] states that rebinding an allocator to the same type should result in the "
"original allocator");
static_assert(is_nothrow_default_constructible<allocator_type>::value ==
is_nothrow_default_constructible<__pointer_allocator>::value,
"rebinding an allocator should not change excpetion guarantees");
static_assert(is_nothrow_move_constructible<allocator_type>::value ==
is_nothrow_move_constructible<typename __map::allocator_type>::value,
"rebinding an allocator should not change excpetion guarantees");
private:
struct __deque_block_range {
explicit _LIBCPP_HIDE_FROM_ABI
__deque_block_range(pointer __b, pointer __e) _NOEXCEPT : __begin_(__b), __end_(__e) {}
const pointer __begin_;
const pointer __end_;
};
struct __deque_range {
iterator __pos_;
const iterator __end_;
_LIBCPP_HIDE_FROM_ABI __deque_range(iterator __pos, iterator __e) _NOEXCEPT
: __pos_(__pos), __end_(__e) {}
explicit _LIBCPP_HIDE_FROM_ABI operator bool() const _NOEXCEPT {
return __pos_ != __end_;
}
_LIBCPP_HIDE_FROM_ABI __deque_range begin() const {
return *this;
}
_LIBCPP_HIDE_FROM_ABI __deque_range end() const {
return __deque_range(__end_, __end_);
}
_LIBCPP_HIDE_FROM_ABI __deque_block_range operator*() const _NOEXCEPT {
if (__pos_.__m_iter_ == __end_.__m_iter_) {
return __deque_block_range(__pos_.__ptr_, __end_.__ptr_);
}
return __deque_block_range(__pos_.__ptr_, *__pos_.__m_iter_ + __block_size);
}
_LIBCPP_HIDE_FROM_ABI __deque_range& operator++() _NOEXCEPT {
if (__pos_.__m_iter_ == __end_.__m_iter_) {
__pos_ = __end_;
} else {
++__pos_.__m_iter_;
__pos_.__ptr_ = *__pos_.__m_iter_;
}
return *this;
}
_LIBCPP_HIDE_FROM_ABI friend bool operator==(__deque_range const& __lhs, __deque_range const& __rhs) {
return __lhs.__pos_ == __rhs.__pos_;
}
_LIBCPP_HIDE_FROM_ABI friend bool operator!=(__deque_range const& __lhs, __deque_range const& __rhs) {
return !(__lhs == __rhs);
}
};
struct _ConstructTransaction {
_LIBCPP_HIDE_FROM_ABI _ConstructTransaction(deque* __db, __deque_block_range& __r)
: __pos_(__r.__begin_), __end_(__r.__end_), __begin_(__r.__begin_), __base_(__db) {}
_LIBCPP_HIDE_FROM_ABI ~_ConstructTransaction() {
__base_->__size() += (__pos_ - __begin_);
}
pointer __pos_;
const pointer __end_;
private:
const pointer __begin_;
deque* const __base_;
};
static const difference_type __block_size;
__map __map_;
size_type __start_;
__compressed_pair<size_type, allocator_type> __size_;
public:
// construct/copy/destroy:
_LIBCPP_HIDE_FROM_ABI
deque() _NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value)
: __start_(0), __size_(0, __default_init_tag()) {}
_LIBCPP_HIDE_FROM_ABI ~deque() {
clear();
typename __map::iterator __i = __map_.begin();
typename __map::iterator __e = __map_.end();
for (; __i != __e; ++__i)
__alloc_traits::deallocate(__alloc(), *__i, __block_size);
}
_LIBCPP_HIDE_FROM_ABI explicit deque(const allocator_type& __a)
: __map_(__pointer_allocator(__a)), __start_(0), __size_(0, __a) {}
explicit _LIBCPP_HIDE_FROM_ABI deque(size_type __n);
#if _LIBCPP_STD_VER >= 14
explicit _LIBCPP_HIDE_FROM_ABI deque(size_type __n, const _Allocator& __a);
#endif
_LIBCPP_HIDE_FROM_ABI deque(size_type __n, const value_type& __v);
template <class = __enable_if_t<__is_allocator<_Allocator>::value> >
_LIBCPP_HIDE_FROM_ABI deque(size_type __n, const value_type& __v, const allocator_type& __a)
: __map_(__pointer_allocator(__a)), __start_(0), __size_(0, __a)
{
if (__n > 0)
__append(__n, __v);
}
template <class _InputIter>
_LIBCPP_HIDE_FROM_ABI deque(_InputIter __f, _InputIter __l,
typename enable_if<__is_cpp17_input_iterator<_InputIter>::value>::type* = 0);
template <class _InputIter>
_LIBCPP_HIDE_FROM_ABI deque(_InputIter __f, _InputIter __l, const allocator_type& __a,
typename enable_if<__is_cpp17_input_iterator<_InputIter>::value>::type* = 0);
_LIBCPP_HIDE_FROM_ABI deque(const deque& __c);
_LIBCPP_HIDE_FROM_ABI deque(const deque& __c, const __type_identity_t<allocator_type>& __a);
_LIBCPP_HIDE_FROM_ABI deque& operator=(const deque& __c);
#ifndef _LIBCPP_CXX03_LANG
_LIBCPP_HIDE_FROM_ABI deque(initializer_list<value_type> __il);
_LIBCPP_HIDE_FROM_ABI deque(initializer_list<value_type> __il, const allocator_type& __a);
_LIBCPP_HIDE_FROM_ABI
deque& operator=(initializer_list<value_type> __il) {assign(__il); return *this;}
_LIBCPP_HIDE_FROM_ABI
deque(deque&& __c) _NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value);
_LIBCPP_HIDE_FROM_ABI
deque(deque&& __c, const __type_identity_t<allocator_type>& __a);
_LIBCPP_HIDE_FROM_ABI
deque& operator=(deque&& __c)
_NOEXCEPT_(__alloc_traits::propagate_on_container_move_assignment::value &&
is_nothrow_move_assignable<allocator_type>::value);
_LIBCPP_HIDE_FROM_ABI
void assign(initializer_list<value_type> __il) {assign(__il.begin(), __il.end());}
#endif // _LIBCPP_CXX03_LANG
template <class _InputIter>
_LIBCPP_HIDE_FROM_ABI void assign(_InputIter __f, _InputIter __l,
typename enable_if<__is_cpp17_input_iterator<_InputIter>::value &&
!__is_cpp17_random_access_iterator<_InputIter>::value>::type* = 0);
template <class _RAIter>
_LIBCPP_HIDE_FROM_ABI void assign(_RAIter __f, _RAIter __l,
typename enable_if<__is_cpp17_random_access_iterator<_RAIter>::value>::type* = 0);
_LIBCPP_HIDE_FROM_ABI void assign(size_type __n, const value_type& __v);
_LIBCPP_HIDE_FROM_ABI
allocator_type get_allocator() const _NOEXCEPT;
_LIBCPP_HIDE_FROM_ABI allocator_type& __alloc() _NOEXCEPT { return __size_.second(); }
_LIBCPP_HIDE_FROM_ABI const allocator_type& __alloc() const _NOEXCEPT { return __size_.second(); }
// iterators:
_LIBCPP_HIDE_FROM_ABI iterator begin() _NOEXCEPT {
__map_pointer __mp = __map_.begin() + __start_ / __block_size;
return iterator(__mp, __map_.empty() ? 0 : *__mp + __start_ % __block_size);
}
_LIBCPP_HIDE_FROM_ABI const_iterator begin() const _NOEXCEPT {
__map_const_pointer __mp =
static_cast<__map_const_pointer>(__map_.begin() + __start_ / __block_size);
return const_iterator(__mp, __map_.empty() ? 0 : *__mp + __start_ % __block_size);
}
_LIBCPP_HIDE_FROM_ABI iterator end() _NOEXCEPT {
size_type __p = size() + __start_;
__map_pointer __mp = __map_.begin() + __p / __block_size;
return iterator(__mp, __map_.empty() ? 0 : *__mp + __p % __block_size);
}
_LIBCPP_HIDE_FROM_ABI const_iterator end() const _NOEXCEPT {
size_type __p = size() + __start_;
__map_const_pointer __mp = static_cast<__map_const_pointer>(__map_.begin() + __p / __block_size);
return const_iterator(__mp, __map_.empty() ? 0 : *__mp + __p % __block_size);
}
_LIBCPP_HIDE_FROM_ABI
reverse_iterator rbegin() _NOEXCEPT
{return reverse_iterator(end());}
_LIBCPP_HIDE_FROM_ABI
const_reverse_iterator rbegin() const _NOEXCEPT
{return const_reverse_iterator(end());}
_LIBCPP_HIDE_FROM_ABI
reverse_iterator rend() _NOEXCEPT
{return reverse_iterator(begin());}
_LIBCPP_HIDE_FROM_ABI
const_reverse_iterator rend() const _NOEXCEPT
{return const_reverse_iterator(begin());}
_LIBCPP_HIDE_FROM_ABI
const_iterator cbegin() const _NOEXCEPT
{return begin();}
_LIBCPP_HIDE_FROM_ABI
const_iterator cend() const _NOEXCEPT
{return end();}
_LIBCPP_HIDE_FROM_ABI
const_reverse_iterator crbegin() const _NOEXCEPT
{return const_reverse_iterator(end());}
_LIBCPP_HIDE_FROM_ABI
const_reverse_iterator crend() const _NOEXCEPT
{return const_reverse_iterator(begin());}
// capacity:
_LIBCPP_HIDE_FROM_ABI
size_type size() const _NOEXCEPT {return __size();}
_LIBCPP_HIDE_FROM_ABI size_type& __size() _NOEXCEPT { return __size_.first(); }
_LIBCPP_HIDE_FROM_ABI const size_type& __size() const _NOEXCEPT { return __size_.first(); }
_LIBCPP_HIDE_FROM_ABI
size_type max_size() const _NOEXCEPT
{return _VSTD::min<size_type>(
__alloc_traits::max_size(__alloc()),
numeric_limits<difference_type>::max());}
_LIBCPP_HIDE_FROM_ABI void resize(size_type __n);
_LIBCPP_HIDE_FROM_ABI void resize(size_type __n, const value_type& __v);
_LIBCPP_HIDE_FROM_ABI void shrink_to_fit() _NOEXCEPT;
_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_HIDE_FROM_ABI
bool empty() const _NOEXCEPT {return size() == 0;}
// element access:
_LIBCPP_HIDE_FROM_ABI
reference operator[](size_type __i) _NOEXCEPT;
_LIBCPP_HIDE_FROM_ABI
const_reference operator[](size_type __i) const _NOEXCEPT;
_LIBCPP_HIDE_FROM_ABI
reference at(size_type __i);
_LIBCPP_HIDE_FROM_ABI
const_reference at(size_type __i) const;
_LIBCPP_HIDE_FROM_ABI
reference front() _NOEXCEPT;
_LIBCPP_HIDE_FROM_ABI
const_reference front() const _NOEXCEPT;
_LIBCPP_HIDE_FROM_ABI
reference back() _NOEXCEPT;
_LIBCPP_HIDE_FROM_ABI
const_reference back() const _NOEXCEPT;
// 23.2.2.3 modifiers:
_LIBCPP_HIDE_FROM_ABI void push_front(const value_type& __v);
_LIBCPP_HIDE_FROM_ABI void push_back(const value_type& __v);
#ifndef _LIBCPP_CXX03_LANG
#if _LIBCPP_STD_VER >= 17
template <class... _Args> _LIBCPP_HIDE_FROM_ABI reference emplace_front(_Args&&... __args);
template <class... _Args> _LIBCPP_HIDE_FROM_ABI reference emplace_back (_Args&&... __args);
#else
template <class... _Args> _LIBCPP_HIDE_FROM_ABI void emplace_front(_Args&&... __args);
template <class... _Args> _LIBCPP_HIDE_FROM_ABI void emplace_back (_Args&&... __args);
#endif
template <class... _Args> _LIBCPP_HIDE_FROM_ABI iterator emplace(const_iterator __p, _Args&&... __args);
_LIBCPP_HIDE_FROM_ABI void push_front(value_type&& __v);
_LIBCPP_HIDE_FROM_ABI void push_back(value_type&& __v);
_LIBCPP_HIDE_FROM_ABI iterator insert(const_iterator __p, value_type&& __v);
_LIBCPP_HIDE_FROM_ABI
iterator insert(const_iterator __p, initializer_list<value_type> __il)
{return insert(__p, __il.begin(), __il.end());}
#endif // _LIBCPP_CXX03_LANG
_LIBCPP_HIDE_FROM_ABI iterator insert(const_iterator __p, const value_type& __v);
_LIBCPP_HIDE_FROM_ABI iterator insert(const_iterator __p, size_type __n, const value_type& __v);
template <class _InputIter>
_LIBCPP_HIDE_FROM_ABI iterator insert(const_iterator __p, _InputIter __f, _InputIter __l,
typename enable_if<__is_exactly_cpp17_input_iterator<_InputIter>::value>::type* = 0);
template <class _ForwardIterator>
_LIBCPP_HIDE_FROM_ABI iterator insert(const_iterator __p, _ForwardIterator __f, _ForwardIterator __l,
typename enable_if<__is_exactly_cpp17_forward_iterator<_ForwardIterator>::value>::type* = 0);
template <class _BiIter>
_LIBCPP_HIDE_FROM_ABI iterator insert(const_iterator __p, _BiIter __f, _BiIter __l,
typename enable_if<__is_cpp17_bidirectional_iterator<_BiIter>::value>::type* = 0);
_LIBCPP_HIDE_FROM_ABI void pop_front();
_LIBCPP_HIDE_FROM_ABI void pop_back();
_LIBCPP_HIDE_FROM_ABI iterator erase(const_iterator __p);
_LIBCPP_HIDE_FROM_ABI iterator erase(const_iterator __f, const_iterator __l);
_LIBCPP_HIDE_FROM_ABI
void swap(deque& __c)
#if _LIBCPP_STD_VER >= 14
_NOEXCEPT;
#else
_NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value ||
__is_nothrow_swappable<allocator_type>::value);
#endif
_LIBCPP_HIDE_FROM_ABI
void clear() _NOEXCEPT;
_LIBCPP_HIDE_FROM_ABI
bool __invariants() const {
if (!__map_.__invariants())
return false;
if (__map_.size() >= size_type(-1) / __block_size)
return false;
for (typename __map::const_iterator __i = __map_.begin(), __e = __map_.end();
__i != __e; ++__i)
if (*__i == nullptr)
return false;
if (__map_.size() != 0)
{
if (size() >= __map_.size() * __block_size)
return false;
if (__start_ >= __map_.size() * __block_size - size())
return false;
}
else
{
if (size() != 0)
return false;
if (__start_ != 0)
return false;
}
return true;
}
_LIBCPP_HIDE_FROM_ABI
void __move_assign_alloc(deque& __c)
_NOEXCEPT_(!__alloc_traits::propagate_on_container_move_assignment::value ||
is_nothrow_move_assignable<allocator_type>::value)
{__move_assign_alloc(__c, integral_constant<bool,
__alloc_traits::propagate_on_container_move_assignment::value>());}
_LIBCPP_HIDE_FROM_ABI
void __move_assign_alloc(deque& __c, true_type)
_NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value)
{
__alloc() = _VSTD::move(__c.__alloc());
}
_LIBCPP_HIDE_FROM_ABI
void __move_assign_alloc(deque&, false_type) _NOEXCEPT
{}
_LIBCPP_HIDE_FROM_ABI
void __move_assign(deque& __c)
_NOEXCEPT_(__alloc_traits::propagate_on_container_move_assignment::value &&
is_nothrow_move_assignable<allocator_type>::value)
{
__map_ = _VSTD::move(__c.__map_);
__start_ = __c.__start_;
__size() = __c.size();
__move_assign_alloc(__c);
__c.__start_ = __c.__size() = 0;
}
_LIBCPP_HIDE_FROM_ABI
static size_type __recommend_blocks(size_type __n)
{
return __n / __block_size + (__n % __block_size != 0);
}
_LIBCPP_HIDE_FROM_ABI
size_type __capacity() const
{
return __map_.size() == 0 ? 0 : __map_.size() * __block_size - 1;
}
_LIBCPP_HIDE_FROM_ABI
size_type __block_count() const
{
return __map_.size();
}
_LIBCPP_HIDE_FROM_ABI
size_type __front_spare() const
{
return __start_;
}
_LIBCPP_HIDE_FROM_ABI
size_type __front_spare_blocks() const {
return __front_spare() / __block_size;
}
_LIBCPP_HIDE_FROM_ABI
size_type __back_spare() const
{
return __capacity() - (__start_ + size());
}
_LIBCPP_HIDE_FROM_ABI
size_type __back_spare_blocks() const {
return __back_spare() / __block_size;
}
private:
_LIBCPP_HIDE_FROM_ABI
bool __maybe_remove_front_spare(bool __keep_one = true) {
if (__front_spare_blocks() >= 2 || (!__keep_one && __front_spare_blocks())) {
__alloc_traits::deallocate(__alloc(), __map_.front(),
__block_size);
__map_.pop_front();
__start_ -= __block_size;
return true;
}
return false;
}
_LIBCPP_HIDE_FROM_ABI
bool __maybe_remove_back_spare(bool __keep_one = true) {
if (__back_spare_blocks() >= 2 || (!__keep_one && __back_spare_blocks())) {
__alloc_traits::deallocate(__alloc(), __map_.back(),
__block_size);
__map_.pop_back();
return true;
}
return false;
}
template <class _InpIter>
_LIBCPP_HIDE_FROM_ABI void __append(_InpIter __f, _InpIter __l,
typename enable_if<__is_exactly_cpp17_input_iterator<_InpIter>::value>::type* = 0);
template <class _ForIter>
_LIBCPP_HIDE_FROM_ABI void __append(_ForIter __f, _ForIter __l,
typename enable_if<__is_cpp17_forward_iterator<_ForIter>::value>::type* = 0);
_LIBCPP_HIDE_FROM_ABI void __append(size_type __n);
_LIBCPP_HIDE_FROM_ABI void __append(size_type __n, const value_type& __v);
_LIBCPP_HIDE_FROM_ABI void __erase_to_end(const_iterator __f);
_LIBCPP_HIDE_FROM_ABI void __add_front_capacity();
_LIBCPP_HIDE_FROM_ABI void __add_front_capacity(size_type __n);
_LIBCPP_HIDE_FROM_ABI void __add_back_capacity();
_LIBCPP_HIDE_FROM_ABI void __add_back_capacity(size_type __n);
_LIBCPP_HIDE_FROM_ABI iterator __move_and_check(iterator __f, iterator __l, iterator __r,
const_pointer& __vt);
_LIBCPP_HIDE_FROM_ABI iterator __move_backward_and_check(iterator __f, iterator __l, iterator __r,
const_pointer& __vt);
_LIBCPP_HIDE_FROM_ABI void __move_construct_and_check(iterator __f, iterator __l,
iterator __r, const_pointer& __vt);
_LIBCPP_HIDE_FROM_ABI void __move_construct_backward_and_check(iterator __f, iterator __l,
iterator __r, const_pointer& __vt);
_LIBCPP_HIDE_FROM_ABI
void __copy_assign_alloc(const deque& __c)
{__copy_assign_alloc(__c, integral_constant<bool,
__alloc_traits::propagate_on_container_copy_assignment::value>());}
_LIBCPP_HIDE_FROM_ABI
void __copy_assign_alloc(const deque& __c, true_type)
{
if (__alloc() != __c.__alloc())
{
clear();
shrink_to_fit();
}
__alloc() = __c.__alloc();
__map_.__alloc() = __c.__map_.__alloc();
}
_LIBCPP_HIDE_FROM_ABI
void __copy_assign_alloc(const deque&, false_type)
{}
_LIBCPP_HIDE_FROM_ABI void __move_assign(deque& __c, true_type)
_NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value);
_LIBCPP_HIDE_FROM_ABI void __move_assign(deque& __c, false_type);
};
template <class _Tp, class _Alloc>
_LIBCPP_CONSTEXPR const typename allocator_traits<_Alloc>::difference_type deque<_Tp, _Alloc>::__block_size =
__deque_block_size<value_type, difference_type>::value;
#if _LIBCPP_STD_VER >= 17
template<class _InputIterator,
class _Alloc = allocator<__iter_value_type<_InputIterator>>,
class = enable_if_t<__is_cpp17_input_iterator<_InputIterator>::value>,
class = enable_if_t<__is_allocator<_Alloc>::value>
>
deque(_InputIterator, _InputIterator)
-> deque<__iter_value_type<_InputIterator>, _Alloc>;
template<class _InputIterator,
class _Alloc,
class = enable_if_t<__is_cpp17_input_iterator<_InputIterator>::value>,
class = enable_if_t<__is_allocator<_Alloc>::value>
>
deque(_InputIterator, _InputIterator, _Alloc)
-> deque<__iter_value_type<_InputIterator>, _Alloc>;
#endif
template <class _Tp, class _Allocator>
deque<_Tp, _Allocator>::deque(size_type __n)
: __start_(0), __size_(0, __default_init_tag())
{
if (__n > 0)
__append(__n);
}
#if _LIBCPP_STD_VER >= 14
template <class _Tp, class _Allocator>
deque<_Tp, _Allocator>::deque(size_type __n, const _Allocator& __a)
: __map_(__pointer_allocator(__a)), __start_(0), __size_(0, __a)
{
if (__n > 0)
__append(__n);
}
#endif
template <class _Tp, class _Allocator>
deque<_Tp, _Allocator>::deque(size_type __n, const value_type& __v)
: __start_(0), __size_(0, __default_init_tag())
{
if (__n > 0)
__append(__n, __v);
}
template <class _Tp, class _Allocator>
template <class _InputIter>
deque<_Tp, _Allocator>::deque(_InputIter __f, _InputIter __l,
typename enable_if<__is_cpp17_input_iterator<_InputIter>::value>::type*)
: __start_(0), __size_(0, __default_init_tag())
{
__append(__f, __l);
}
template <class _Tp, class _Allocator>
template <class _InputIter>
deque<_Tp, _Allocator>::deque(_InputIter __f, _InputIter __l, const allocator_type& __a,
typename enable_if<__is_cpp17_input_iterator<_InputIter>::value>::type*)
: __map_(__pointer_allocator(__a)), __start_(0), __size_(0, __a)
{
__append(__f, __l);
}
template <class _Tp, class _Allocator>
deque<_Tp, _Allocator>::deque(const deque& __c)
: __map_(__pointer_allocator(__alloc_traits::select_on_container_copy_construction(__c.__alloc()))),
__start_(0),
__size_(0, __map_.__alloc())
{
__append(__c.begin(), __c.end());
}
template <class _Tp, class _Allocator>
deque<_Tp, _Allocator>::deque(const deque& __c, const __type_identity_t<allocator_type>& __a)
: __map_(__pointer_allocator(__a)), __start_(0), __size_(0, __a)
{
__append(__c.begin(), __c.end());
}
template <class _Tp, class _Allocator>
deque<_Tp, _Allocator>&
deque<_Tp, _Allocator>::operator=(const deque& __c)
{
if (this != _VSTD::addressof(__c))
{
__copy_assign_alloc(__c);
assign(__c.begin(), __c.end());
}
return *this;
}
#ifndef _LIBCPP_CXX03_LANG
template <class _Tp, class _Allocator>
deque<_Tp, _Allocator>::deque(initializer_list<value_type> __il)
: __start_(0), __size_(0, __default_init_tag())
{
__append(__il.begin(), __il.end());
}
template <class _Tp, class _Allocator>
deque<_Tp, _Allocator>::deque(initializer_list<value_type> __il, const allocator_type& __a)
: __map_(__pointer_allocator(__a)), __start_(0), __size_(0, __a)
{
__append(__il.begin(), __il.end());
}
template <class _Tp, class _Allocator>
inline
deque<_Tp, _Allocator>::deque(deque&& __c)
_NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value)
: __map_(std::move(__c.__map_)), __start_(std::move(__c.__start_)), __size_(std::move(__c.__size_))
{
__c.__start_ = 0;
__c.__size() = 0;
}
template <class _Tp, class _Allocator>
inline
deque<_Tp, _Allocator>::deque(deque&& __c, const __type_identity_t<allocator_type>& __a)
: __map_(std::move(__c.__map_), __pointer_allocator(__a)),
__start_(std::move(__c.__start_)),
__size_(std::move(__c.__size()), __a)
{
if (__a == __c.__alloc())
{
__c.__start_ = 0;
__c.__size() = 0;
}
else
{
__map_.clear();
__start_ = 0;
__size() = 0;
typedef move_iterator<iterator> _Ip;
assign(_Ip(__c.begin()), _Ip(__c.end()));
}
}
template <class _Tp, class _Allocator>
inline
deque<_Tp, _Allocator>&
deque<_Tp, _Allocator>::operator=(deque&& __c)
_NOEXCEPT_(__alloc_traits::propagate_on_container_move_assignment::value &&
is_nothrow_move_assignable<allocator_type>::value)
{
__move_assign(__c, integral_constant<bool,
__alloc_traits::propagate_on_container_move_assignment::value>());
return *this;
}
template <class _Tp, class _Allocator>
void
deque<_Tp, _Allocator>::__move_assign(deque& __c, false_type)
{
if (__alloc() != __c.__alloc())
{
typedef move_iterator<iterator> _Ip;
assign(_Ip(__c.begin()), _Ip(__c.end()));
}
else
__move_assign(__c, true_type());
}
template <class _Tp, class _Allocator>
void
deque<_Tp, _Allocator>::__move_assign(deque& __c, true_type)
_NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value)
{
clear();
shrink_to_fit();
__move_assign(__c);
}
#endif // _LIBCPP_CXX03_LANG
template <class _Tp, class _Allocator>
template <class _InputIter>
void
deque<_Tp, _Allocator>::assign(_InputIter __f, _InputIter __l,
typename enable_if<__is_cpp17_input_iterator<_InputIter>::value &&
!__is_cpp17_random_access_iterator<_InputIter>::value>::type*)
{
iterator __i = begin();
iterator __e = end();
for (; __f != __l && __i != __e; ++__f, (void) ++__i)
*__i = *__f;
if (__f != __l)
__append(__f, __l);
else
__erase_to_end(__i);
}
template <class _Tp, class _Allocator>
template <class _RAIter>
void
deque<_Tp, _Allocator>::assign(_RAIter __f, _RAIter __l,
typename enable_if<__is_cpp17_random_access_iterator<_RAIter>::value>::type*)
{
if (static_cast<size_type>(__l - __f) > size())
{
_RAIter __m = __f + size();
_VSTD::copy(__f, __m, begin());
__append(__m, __l);
}
else
__erase_to_end(_VSTD::copy(__f, __l, begin()));
}
template <class _Tp, class _Allocator>
void
deque<_Tp, _Allocator>::assign(size_type __n, const value_type& __v)
{
if (__n > size())
{
_VSTD::fill_n(begin(), size(), __v);
__n -= size();
__append(__n, __v);
}
else
__erase_to_end(_VSTD::fill_n(begin(), __n, __v));
}
template <class _Tp, class _Allocator>
inline
_Allocator
deque<_Tp, _Allocator>::get_allocator() const _NOEXCEPT
{
return __alloc();
}
template <class _Tp, class _Allocator>
void
deque<_Tp, _Allocator>::resize(size_type __n)
{
if (__n > size())
__append(__n - size());
else if (__n < size())
__erase_to_end(begin() + __n);
}
template <class _Tp, class _Allocator>
void
deque<_Tp, _Allocator>::resize(size_type __n, const value_type& __v)
{
if (__n > size())
__append(__n - size(), __v);
else if (__n < size())
__erase_to_end(begin() + __n);
}
template <class _Tp, class _Allocator>
void
deque<_Tp, _Allocator>::shrink_to_fit() _NOEXCEPT
{
allocator_type& __a = __alloc();
if (empty())
{
while (__map_.size() > 0)
{
__alloc_traits::deallocate(__a, __map_.back(), __block_size);
__map_.pop_back();
}
__start_ = 0;
}
else
{
__maybe_remove_front_spare(/*__keep_one=*/false);
__maybe_remove_back_spare(/*__keep_one=*/false);
}
__map_.shrink_to_fit();
}
template <class _Tp, class _Allocator>
inline
typename deque<_Tp, _Allocator>::reference
deque<_Tp, _Allocator>::operator[](size_type __i) _NOEXCEPT
{
size_type __p = __start_ + __i;
return *(*(__map_.begin() + __p / __block_size) + __p % __block_size);
}
template <class _Tp, class _Allocator>
inline
typename deque<_Tp, _Allocator>::const_reference
deque<_Tp, _Allocator>::operator[](size_type __i) const _NOEXCEPT
{
size_type __p = __start_ + __i;
return *(*(__map_.begin() + __p / __block_size) + __p % __block_size);
}
template <class _Tp, class _Allocator>
inline
typename deque<_Tp, _Allocator>::reference
deque<_Tp, _Allocator>::at(size_type __i)
{
if (__i >= size())
_VSTD::__throw_out_of_range("deque");
size_type __p = __start_ + __i;
return *(*(__map_.begin() + __p / __block_size) + __p % __block_size);
}
template <class _Tp, class _Allocator>
inline
typename deque<_Tp, _Allocator>::const_reference
deque<_Tp, _Allocator>::at(size_type __i) const
{
if (__i >= size())
_VSTD::__throw_out_of_range("deque");
size_type __p = __start_ + __i;
return *(*(__map_.begin() + __p / __block_size) + __p % __block_size);
}
template <class _Tp, class _Allocator>
inline
typename deque<_Tp, _Allocator>::reference
deque<_Tp, _Allocator>::front() _NOEXCEPT
{
return *(*(__map_.begin() + __start_ / __block_size)
+ __start_ % __block_size);
}
template <class _Tp, class _Allocator>
inline
typename deque<_Tp, _Allocator>::const_reference
deque<_Tp, _Allocator>::front() const _NOEXCEPT
{
return *(*(__map_.begin() + __start_ / __block_size)
+ __start_ % __block_size);
}
template <class _Tp, class _Allocator>
inline
typename deque<_Tp, _Allocator>::reference
deque<_Tp, _Allocator>::back() _NOEXCEPT
{
size_type __p = size() + __start_ - 1;
return *(*(__map_.begin() + __p / __block_size) + __p % __block_size);
}
template <class _Tp, class _Allocator>
inline
typename deque<_Tp, _Allocator>::const_reference
deque<_Tp, _Allocator>::back() const _NOEXCEPT
{
size_type __p = size() + __start_ - 1;
return *(*(__map_.begin() + __p / __block_size) + __p % __block_size);
}
template <class _Tp, class _Allocator>
void
deque<_Tp, _Allocator>::push_back(const value_type& __v)
{
allocator_type& __a = __alloc();
if (__back_spare() == 0)
__add_back_capacity();
// __back_spare() >= 1
__alloc_traits::construct(__a, _VSTD::addressof(*end()), __v);
++__size();
}
template <class _Tp, class _Allocator>
void
deque<_Tp, _Allocator>::push_front(const value_type& __v)
{
allocator_type& __a = __alloc();
if (__front_spare() == 0)
__add_front_capacity();
// __front_spare() >= 1
__alloc_traits::construct(__a, _VSTD::addressof(*--begin()), __v);
--__start_;
++__size();
}
#ifndef _LIBCPP_CXX03_LANG
template <class _Tp, class _Allocator>
void
deque<_Tp, _Allocator>::push_back(value_type&& __v)
{
allocator_type& __a = __alloc();
if (__back_spare() == 0)
__add_back_capacity();
// __back_spare() >= 1
__alloc_traits::construct(__a, _VSTD::addressof(*end()), _VSTD::move(__v));
++__size();
}
template <class _Tp, class _Allocator>
template <class... _Args>
#if _LIBCPP_STD_VER >= 17
typename deque<_Tp, _Allocator>::reference
#else
void
#endif
deque<_Tp, _Allocator>::emplace_back(_Args&&... __args)
{
allocator_type& __a = __alloc();
if (__back_spare() == 0)
__add_back_capacity();
// __back_spare() >= 1
__alloc_traits::construct(__a, _VSTD::addressof(*end()),
_VSTD::forward<_Args>(__args)...);
++__size();
#if _LIBCPP_STD_VER >= 17
return *--end();
#endif
}
template <class _Tp, class _Allocator>
void
deque<_Tp, _Allocator>::push_front(value_type&& __v)
{
allocator_type& __a = __alloc();
if (__front_spare() == 0)
__add_front_capacity();
// __front_spare() >= 1
__alloc_traits::construct(__a, _VSTD::addressof(*--begin()), _VSTD::move(__v));
--__start_;
++__size();
}
template <class _Tp, class _Allocator>
template <class... _Args>
#if _LIBCPP_STD_VER >= 17
typename deque<_Tp, _Allocator>::reference
#else
void
#endif
deque<_Tp, _Allocator>::emplace_front(_Args&&... __args)
{
allocator_type& __a = __alloc();
if (__front_spare() == 0)
__add_front_capacity();
// __front_spare() >= 1
__alloc_traits::construct(__a, _VSTD::addressof(*--begin()), _VSTD::forward<_Args>(__args)...);
--__start_;
++__size();
#if _LIBCPP_STD_VER >= 17
return *begin();
#endif
}
template <class _Tp, class _Allocator>
typename deque<_Tp, _Allocator>::iterator
deque<_Tp, _Allocator>::insert(const_iterator __p, value_type&& __v)
{
size_type __pos = __p - begin();
size_type __to_end = size() - __pos;
allocator_type& __a = __alloc();
if (__pos < __to_end)
{ // insert by shifting things backward
if (__front_spare() == 0)
__add_front_capacity();
// __front_spare() >= 1
if (__pos == 0)
{
__alloc_traits::construct(__a, _VSTD::addressof(*--begin()), _VSTD::move(__v));
--__start_;
++__size();
}
else
{
iterator __b = begin();
iterator __bm1 = _VSTD::prev(__b);
__alloc_traits::construct(__a, _VSTD::addressof(*__bm1), _VSTD::move(*__b));
--__start_;
++__size();
if (__pos > 1)
__b = _VSTD::move(_VSTD::next(__b), __b + __pos, __b);
*__b = _VSTD::move(__v);
}
}
else
{ // insert by shifting things forward
if (__back_spare() == 0)
__add_back_capacity();
// __back_capacity >= 1
size_type __de = size() - __pos;
if (__de == 0)
{
__alloc_traits::construct(__a, _VSTD::addressof(*end()), _VSTD::move(__v));
++__size();
}
else
{
iterator __e = end();
iterator __em1 = _VSTD::prev(__e);
__alloc_traits::construct(__a, _VSTD::addressof(*__e), _VSTD::move(*__em1));
++__size();
if (__de > 1)
__e = _VSTD::move_backward(__e - __de, __em1, __e);
*--__e = _VSTD::move(__v);
}
}
return begin() + __pos;
}
template <class _Tp, class _Allocator>
template <class... _Args>
typename deque<_Tp, _Allocator>::iterator
deque<_Tp, _Allocator>::emplace(const_iterator __p, _Args&&... __args)
{
size_type __pos = __p - begin();
size_type __to_end = size() - __pos;
allocator_type& __a = __alloc();
if (__pos < __to_end)
{ // insert by shifting things backward
if (__front_spare() == 0)
__add_front_capacity();
// __front_spare() >= 1
if (__pos == 0)
{
__alloc_traits::construct(__a, _VSTD::addressof(*--begin()), _VSTD::forward<_Args>(__args)...);
--__start_;
++__size();
}
else
{
__temp_value<value_type, _Allocator> __tmp(__alloc(), _VSTD::forward<_Args>(__args)...);
iterator __b = begin();
iterator __bm1 = _VSTD::prev(__b);
__alloc_traits::construct(__a, _VSTD::addressof(*__bm1), _VSTD::move(*__b));
--__start_;
++__size();
if (__pos > 1)
__b = _VSTD::move(_VSTD::next(__b), __b + __pos, __b);
*__b = _VSTD::move(__tmp.get());
}
}
else
{ // insert by shifting things forward
if (__back_spare() == 0)
__add_back_capacity();
// __back_capacity >= 1
size_type __de = size() - __pos;
if (__de == 0)
{
__alloc_traits::construct(__a, _VSTD::addressof(*end()), _VSTD::forward<_Args>(__args)...);
++__size();
}
else
{
__temp_value<value_type, _Allocator> __tmp(__alloc(), _VSTD::forward<_Args>(__args)...);
iterator __e = end();
iterator __em1 = _VSTD::prev(__e);
__alloc_traits::construct(__a, _VSTD::addressof(*__e), _VSTD::move(*__em1));
++__size();
if (__de > 1)
__e = _VSTD::move_backward(__e - __de, __em1, __e);
*--__e = _VSTD::move(__tmp.get());
}
}
return begin() + __pos;
}
#endif // _LIBCPP_CXX03_LANG
template <class _Tp, class _Allocator>
typename deque<_Tp, _Allocator>::iterator
deque<_Tp, _Allocator>::insert(const_iterator __p, const value_type& __v)
{
size_type __pos = __p - begin();
size_type __to_end = size() - __pos;
allocator_type& __a = __alloc();
if (__pos < __to_end)
{ // insert by shifting things backward
if (__front_spare() == 0)
__add_front_capacity();
// __front_spare() >= 1
if (__pos == 0)
{
__alloc_traits::construct(__a, _VSTD::addressof(*--begin()), __v);
--__start_;
++__size();
}
else
{
const_pointer __vt = pointer_traits<const_pointer>::pointer_to(__v);
iterator __b = begin();
iterator __bm1 = _VSTD::prev(__b);
if (__vt == pointer_traits<const_pointer>::pointer_to(*__b))
__vt = pointer_traits<const_pointer>::pointer_to(*__bm1);
__alloc_traits::construct(__a, _VSTD::addressof(*__bm1), _VSTD::move(*__b));
--__start_;
++__size();
if (__pos > 1)
__b = __move_and_check(_VSTD::next(__b), __b + __pos, __b, __vt);
*__b = *__vt;
}
}
else
{ // insert by shifting things forward
if (__back_spare() == 0)
__add_back_capacity();
// __back_capacity >= 1
size_type __de = size() - __pos;
if (__de == 0)
{
__alloc_traits::construct(__a, _VSTD::addressof(*end()), __v);
++__size();
}
else
{
const_pointer __vt = pointer_traits<const_pointer>::pointer_to(__v);
iterator __e = end();
iterator __em1 = _VSTD::prev(__e);
if (__vt == pointer_traits<const_pointer>::pointer_to(*__em1))
__vt = pointer_traits<const_pointer>::pointer_to(*__e);
__alloc_traits::construct(__a, _VSTD::addressof(*__e), _VSTD::move(*__em1));
++__size();
if (__de > 1)
__e = __move_backward_and_check(__e - __de, __em1, __e, __vt);
*--__e = *__vt;
}
}
return begin() + __pos;
}
template <class _Tp, class _Allocator>
typename deque<_Tp, _Allocator>::iterator
deque<_Tp, _Allocator>::insert(const_iterator __p, size_type __n, const value_type& __v)
{
size_type __pos = __p - begin();
size_type __to_end = __size() - __pos;
allocator_type& __a = __alloc();
if (__pos < __to_end)
{ // insert by shifting things backward
if (__n > __front_spare())
__add_front_capacity(__n - __front_spare());
// __n <= __front_spare()
iterator __old_begin = begin();
iterator __i = __old_begin;
if (__n > __pos)
{
for (size_type __m = __n - __pos; __m; --__m, --__start_, ++__size())
__alloc_traits::construct(__a, _VSTD::addressof(*--__i), __v);
__n = __pos;
}
if (__n > 0)
{
const_pointer __vt = pointer_traits<const_pointer>::pointer_to(__v);
iterator __obn = __old_begin + __n;
__move_construct_backward_and_check(__old_begin, __obn, __i, __vt);
if (__n < __pos)
__old_begin = __move_and_check(__obn, __old_begin + __pos, __old_begin, __vt);
_VSTD::fill_n(__old_begin, __n, *__vt);
}
}
else
{ // insert by shifting things forward
size_type __back_capacity = __back_spare();
if (__n > __back_capacity)
__add_back_capacity(__n - __back_capacity);
// __n <= __back_capacity
iterator __old_end = end();
iterator __i = __old_end;
size_type __de = size() - __pos;
if (__n > __de)
{
for (size_type __m = __n - __de; __m; --__m, (void) ++__i, ++__size())
__alloc_traits::construct(__a, _VSTD::addressof(*__i), __v);
__n = __de;
}
if (__n > 0)
{
const_pointer __vt = pointer_traits<const_pointer>::pointer_to(__v);
iterator __oen = __old_end - __n;
__move_construct_and_check(__oen, __old_end, __i, __vt);
if (__n < __de)
__old_end = __move_backward_and_check(__old_end - __de, __oen, __old_end, __vt);
_VSTD::fill_n(__old_end - __n, __n, *__vt);
}
}
return begin() + __pos;
}
template <class _Tp, class _Allocator>
template <class _InputIter>
typename deque<_Tp, _Allocator>::iterator
deque<_Tp, _Allocator>::insert(const_iterator __p, _InputIter __f, _InputIter __l,
typename enable_if<__is_exactly_cpp17_input_iterator<_InputIter>::value>::type*)
{
__split_buffer<value_type, allocator_type&> __buf(__alloc());
__buf.__construct_at_end(__f, __l);
typedef typename __split_buffer<value_type, allocator_type&>::iterator __bi;
return insert(__p, move_iterator<__bi>(__buf.begin()), move_iterator<__bi>(__buf.end()));
}
template <class _Tp, class _Allocator>
template <class _ForwardIterator>
typename deque<_Tp, _Allocator>::iterator
deque<_Tp, _Allocator>::insert(const_iterator __p, _ForwardIterator __f, _ForwardIterator __l,
typename enable_if<__is_exactly_cpp17_forward_iterator<_ForwardIterator>::value>::type*)
{
size_type __n = _VSTD::distance(__f, __l);
__split_buffer<value_type, allocator_type&> __buf(__n, 0, __alloc());
__buf.__construct_at_end(__f, __l);
typedef typename __split_buffer<value_type, allocator_type&>::iterator __fwd;
return insert(__p, move_iterator<__fwd>(__buf.begin()), move_iterator<__fwd>(__buf.end()));
}
template <class _Tp, class _Allocator>
template <class _BiIter>
typename deque<_Tp, _Allocator>::iterator
deque<_Tp, _Allocator>::insert(const_iterator __p, _BiIter __f, _BiIter __l,
typename enable_if<__is_cpp17_bidirectional_iterator<_BiIter>::value>::type*)
{
size_type __n = _VSTD::distance(__f, __l);
size_type __pos = __p - begin();
size_type __to_end = size() - __pos;
allocator_type& __a = __alloc();
if (__pos < __to_end)
{ // insert by shifting things backward
if (__n > __front_spare())
__add_front_capacity(__n - __front_spare());
// __n <= __front_spare()
iterator __old_begin = begin();
iterator __i = __old_begin;
_BiIter __m = __f;
if (__n > __pos)
{
__m = __pos < __n / 2 ? _VSTD::prev(__l, __pos) : _VSTD::next(__f, __n - __pos);
for (_BiIter __j = __m; __j != __f; --__start_, ++__size())
__alloc_traits::construct(__a, _VSTD::addressof(*--__i), *--__j);
__n = __pos;
}
if (__n > 0)
{
iterator __obn = __old_begin + __n;
for (iterator __j = __obn; __j != __old_begin;)
{
__alloc_traits::construct(__a, _VSTD::addressof(*--__i), _VSTD::move(*--__j));
--__start_;
++__size();
}
if (__n < __pos)
__old_begin = _VSTD::move(__obn, __old_begin + __pos, __old_begin);
_VSTD::copy(__m, __l, __old_begin);
}
}
else
{ // insert by shifting things forward
size_type __back_capacity = __back_spare();
if (__n > __back_capacity)
__add_back_capacity(__n - __back_capacity);
// __n <= __back_capacity
iterator __old_end = end();
iterator __i = __old_end;
_BiIter __m = __l;
size_type __de = size() - __pos;
if (__n > __de)
{
__m = __de < __n / 2 ? _VSTD::next(__f, __de) : _VSTD::prev(__l, __n - __de);
for (_BiIter __j = __m; __j != __l; ++__i, (void) ++__j, ++__size())
__alloc_traits::construct(__a, _VSTD::addressof(*__i), *__j);
__n = __de;
}
if (__n > 0)
{
iterator __oen = __old_end - __n;
for (iterator __j = __oen; __j != __old_end; ++__i, (void) ++__j, ++__size())
__alloc_traits::construct(__a, _VSTD::addressof(*__i), _VSTD::move(*__j));
if (__n < __de)
__old_end = _VSTD::move_backward(__old_end - __de, __oen, __old_end);
_VSTD::copy_backward(__f, __m, __old_end);
}
}
return begin() + __pos;
}
template <class _Tp, class _Allocator>
template <class _InpIter>
void
deque<_Tp, _Allocator>::__append(_InpIter __f, _InpIter __l,
typename enable_if<__is_exactly_cpp17_input_iterator<_InpIter>::value>::type*)
{
for (; __f != __l; ++__f)
#ifdef _LIBCPP_CXX03_LANG
push_back(*__f);
#else
emplace_back(*__f);
#endif
}
template <class _Tp, class _Allocator>
template <class _ForIter>
void
deque<_Tp, _Allocator>::__append(_ForIter __f, _ForIter __l,
typename enable_if<__is_cpp17_forward_iterator<_ForIter>::value>::type*)
{
size_type __n = _VSTD::distance(__f, __l);
allocator_type& __a = __alloc();
size_type __back_capacity = __back_spare();
if (__n > __back_capacity)
__add_back_capacity(__n - __back_capacity);
// __n <= __back_capacity
for (__deque_block_range __br : __deque_range(end(), end() + __n)) {
_ConstructTransaction __tx(this, __br);
for (; __tx.__pos_ != __tx.__end_; ++__tx.__pos_, (void)++__f) {
__alloc_traits::construct(__a, _VSTD::__to_address(__tx.__pos_), *__f);
}
}
}
template <class _Tp, class _Allocator>
void
deque<_Tp, _Allocator>::__append(size_type __n)
{
allocator_type& __a = __alloc();
size_type __back_capacity = __back_spare();
if (__n > __back_capacity)
__add_back_capacity(__n - __back_capacity);
// __n <= __back_capacity
for (__deque_block_range __br : __deque_range(end(), end() + __n)) {
_ConstructTransaction __tx(this, __br);
for (; __tx.__pos_ != __tx.__end_; ++__tx.__pos_) {
__alloc_traits::construct(__a, _VSTD::__to_address(__tx.__pos_));
}
}
}
template <class _Tp, class _Allocator>
void
deque<_Tp, _Allocator>::__append(size_type __n, const value_type& __v)
{
allocator_type& __a = __alloc();
size_type __back_capacity = __back_spare();
if (__n > __back_capacity)
__add_back_capacity(__n - __back_capacity);
// __n <= __back_capacity
for (__deque_block_range __br : __deque_range(end(), end() + __n)) {
_ConstructTransaction __tx(this, __br);
for (; __tx.__pos_ != __tx.__end_; ++__tx.__pos_) {
__alloc_traits::construct(__a, _VSTD::__to_address(__tx.__pos_), __v);
}
}
}
// Create front capacity for one block of elements.
// Strong guarantee. Either do it or don't touch anything.
template <class _Tp, class _Allocator>
void
deque<_Tp, _Allocator>::__add_front_capacity()
{
allocator_type& __a = __alloc();
if (__back_spare() >= __block_size)
{
__start_ += __block_size;
pointer __pt = __map_.back();
__map_.pop_back();
__map_.push_front(__pt);
}
// Else if __map_.size() < __map_.capacity() then we need to allocate 1 buffer
else if (__map_.size() < __map_.capacity())
{ // we can put the new buffer into the map, but don't shift things around
// until all buffers are allocated. If we throw, we don't need to fix
// anything up (any added buffers are undetectible)
if (__map_.__front_spare() > 0)
__map_.push_front(__alloc_traits::allocate(__a, __block_size));
else
{
__map_.push_back(__alloc_traits::allocate(__a, __block_size));
// Done allocating, reorder capacity
pointer __pt = __map_.back();
__map_.pop_back();
__map_.push_front(__pt);
}
__start_ = __map_.size() == 1 ?
__block_size / 2 :
__start_ + __block_size;
}
// Else need to allocate 1 buffer, *and* we need to reallocate __map_.
else
{
__split_buffer<pointer, __pointer_allocator&>
__buf(std::max<size_type>(2 * __map_.capacity(), 1),
0, __map_.__alloc());
typedef __allocator_destructor<_Allocator> _Dp;
unique_ptr<pointer, _Dp> __hold(
__alloc_traits::allocate(__a, __block_size),
_Dp(__a, __block_size));
__buf.push_back(__hold.get());
__hold.release();
for (__map_pointer __i = __map_.begin();
__i != __map_.end(); ++__i)
__buf.push_back(*__i);
_VSTD::swap(__map_.__first_, __buf.__first_);
_VSTD::swap(__map_.__begin_, __buf.__begin_);
_VSTD::swap(__map_.__end_, __buf.__end_);
_VSTD::swap(__map_.__end_cap(), __buf.__end_cap());
__start_ = __map_.size() == 1 ?
__block_size / 2 :
__start_ + __block_size;
}
}
// Create front capacity for __n elements.
// Strong guarantee. Either do it or don't touch anything.
template <class _Tp, class _Allocator>
void
deque<_Tp, _Allocator>::__add_front_capacity(size_type __n)
{
allocator_type& __a = __alloc();
size_type __nb = __recommend_blocks(__n + __map_.empty());
// Number of unused blocks at back:
size_type __back_capacity = __back_spare() / __block_size;
__back_capacity = _VSTD::min(__back_capacity, __nb); // don't take more than you need
__nb -= __back_capacity; // number of blocks need to allocate
// If __nb == 0, then we have sufficient capacity.
if (__nb == 0)
{
__start_ += __block_size * __back_capacity;
for (; __back_capacity > 0; --__back_capacity)
{
pointer __pt = __map_.back();
__map_.pop_back();
__map_.push_front(__pt);
}
}
// Else if __nb <= __map_.capacity() - __map_.size() then we need to allocate __nb buffers
else if (__nb <= __map_.capacity() - __map_.size())
{ // we can put the new buffers into the map, but don't shift things around
// until all buffers are allocated. If we throw, we don't need to fix
// anything up (any added buffers are undetectible)
for (; __nb > 0; --__nb, __start_ += __block_size - (__map_.size() == 1))
{
if (__map_.__front_spare() == 0)
break;
__map_.push_front(__alloc_traits::allocate(__a, __block_size));
}
for (; __nb > 0; --__nb, ++__back_capacity)
__map_.push_back(__alloc_traits::allocate(__a, __block_size));
// Done allocating, reorder capacity
__start_ += __back_capacity * __block_size;
for (; __back_capacity > 0; --__back_capacity)
{
pointer __pt = __map_.back();
__map_.pop_back();
__map_.push_front(__pt);
}
}
// Else need to allocate __nb buffers, *and* we need to reallocate __map_.
else
{
size_type __ds = (__nb + __back_capacity) * __block_size - __map_.empty();
__split_buffer<pointer, __pointer_allocator&>
__buf(std::max<size_type>(2* __map_.capacity(),
__nb + __map_.size()),
0, __map_.__alloc());
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
for (; __nb > 0; --__nb)
__buf.push_back(__alloc_traits::allocate(__a, __block_size));
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
}
catch (...)
{
for (__map_pointer __i = __buf.begin();
__i != __buf.end(); ++__i)
__alloc_traits::deallocate(__a, *__i, __block_size);
throw;
}
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
for (; __back_capacity > 0; --__back_capacity)
{
__buf.push_back(__map_.back());
__map_.pop_back();
}
for (__map_pointer __i = __map_.begin();
__i != __map_.end(); ++__i)
__buf.push_back(*__i);
_VSTD::swap(__map_.__first_, __buf.__first_);
_VSTD::swap(__map_.__begin_, __buf.__begin_);
_VSTD::swap(__map_.__end_, __buf.__end_);
_VSTD::swap(__map_.__end_cap(), __buf.__end_cap());
__start_ += __ds;
}
}
// Create back capacity for one block of elements.
// Strong guarantee. Either do it or don't touch anything.
template <class _Tp, class _Allocator>
void
deque<_Tp, _Allocator>::__add_back_capacity()
{
allocator_type& __a = __alloc();
if (__front_spare() >= __block_size)
{
__start_ -= __block_size;
pointer __pt = __map_.front();
__map_.pop_front();
__map_.push_back(__pt);
}
// Else if __nb <= __map_.capacity() - __map_.size() then we need to allocate __nb buffers
else if (__map_.size() < __map_.capacity())
{ // we can put the new buffer into the map, but don't shift things around
// until it is allocated. If we throw, we don't need to fix
// anything up (any added buffers are undetectible)
if (__map_.__back_spare() != 0)
__map_.push_back(__alloc_traits::allocate(__a, __block_size));
else
{
__map_.push_front(__alloc_traits::allocate(__a, __block_size));
// Done allocating, reorder capacity
pointer __pt = __map_.front();
__map_.pop_front();
__map_.push_back(__pt);
}
}
// Else need to allocate 1 buffer, *and* we need to reallocate __map_.
else
{
__split_buffer<pointer, __pointer_allocator&>
__buf(std::max<size_type>(2* __map_.capacity(), 1),
__map_.size(),
__map_.__alloc());
typedef __allocator_destructor<_Allocator> _Dp;
unique_ptr<pointer, _Dp> __hold(
__alloc_traits::allocate(__a, __block_size),
_Dp(__a, __block_size));
__buf.push_back(__hold.get());
__hold.release();
for (__map_pointer __i = __map_.end();
__i != __map_.begin();)
__buf.push_front(*--__i);
_VSTD::swap(__map_.__first_, __buf.__first_);
_VSTD::swap(__map_.__begin_, __buf.__begin_);
_VSTD::swap(__map_.__end_, __buf.__end_);
_VSTD::swap(__map_.__end_cap(), __buf.__end_cap());
}
}
// Create back capacity for __n elements.
// Strong guarantee. Either do it or don't touch anything.
template <class _Tp, class _Allocator>
void
deque<_Tp, _Allocator>::__add_back_capacity(size_type __n)
{
allocator_type& __a = __alloc();
size_type __nb = __recommend_blocks(__n + __map_.empty());
// Number of unused blocks at front:
size_type __front_capacity = __front_spare() / __block_size;
__front_capacity = _VSTD::min(__front_capacity, __nb); // don't take more than you need
__nb -= __front_capacity; // number of blocks need to allocate
// If __nb == 0, then we have sufficient capacity.
if (__nb == 0)
{
__start_ -= __block_size * __front_capacity;
for (; __front_capacity > 0; --__front_capacity)
{
pointer __pt = __map_.front();
__map_.pop_front();
__map_.push_back(__pt);
}
}
// Else if __nb <= __map_.capacity() - __map_.size() then we need to allocate __nb buffers
else if (__nb <= __map_.capacity() - __map_.size())
{ // we can put the new buffers into the map, but don't shift things around
// until all buffers are allocated. If we throw, we don't need to fix
// anything up (any added buffers are undetectible)
for (; __nb > 0; --__nb)
{
if (__map_.__back_spare() == 0)
break;
__map_.push_back(__alloc_traits::allocate(__a, __block_size));
}
for (; __nb > 0; --__nb, ++__front_capacity, __start_ +=
__block_size - (__map_.size() == 1))
__map_.push_front(__alloc_traits::allocate(__a, __block_size));
// Done allocating, reorder capacity
__start_ -= __block_size * __front_capacity;
for (; __front_capacity > 0; --__front_capacity)
{
pointer __pt = __map_.front();
__map_.pop_front();
__map_.push_back(__pt);
}
}
// Else need to allocate __nb buffers, *and* we need to reallocate __map_.
else
{
size_type __ds = __front_capacity * __block_size;
__split_buffer<pointer, __pointer_allocator&>
__buf(std::max<size_type>(2* __map_.capacity(),
__nb + __map_.size()),
__map_.size() - __front_capacity,
__map_.__alloc());
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
for (; __nb > 0; --__nb)
__buf.push_back(__alloc_traits::allocate(__a, __block_size));
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
}
catch (...)
{
for (__map_pointer __i = __buf.begin();
__i != __buf.end(); ++__i)
__alloc_traits::deallocate(__a, *__i, __block_size);
throw;
}
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
for (; __front_capacity > 0; --__front_capacity)
{
__buf.push_back(__map_.front());
__map_.pop_front();
}
for (__map_pointer __i = __map_.end();
__i != __map_.begin();)
__buf.push_front(*--__i);
_VSTD::swap(__map_.__first_, __buf.__first_);
_VSTD::swap(__map_.__begin_, __buf.__begin_);
_VSTD::swap(__map_.__end_, __buf.__end_);
_VSTD::swap(__map_.__end_cap(), __buf.__end_cap());
__start_ -= __ds;
}
}
template <class _Tp, class _Allocator>
void
deque<_Tp, _Allocator>::pop_front()
{
allocator_type& __a = __alloc();
__alloc_traits::destroy(__a, _VSTD::__to_address(*(__map_.begin() +
__start_ / __block_size) +
__start_ % __block_size));
--__size();
++__start_;
__maybe_remove_front_spare();
}
template <class _Tp, class _Allocator>
void
deque<_Tp, _Allocator>::pop_back()
{
_LIBCPP_ASSERT(!empty(), "deque::pop_back called on an empty deque");
allocator_type& __a = __alloc();
size_type __p = size() + __start_ - 1;
__alloc_traits::destroy(__a, _VSTD::__to_address(*(__map_.begin() +
__p / __block_size) +
__p % __block_size));
--__size();
__maybe_remove_back_spare();
}
// move assign [__f, __l) to [__r, __r + (__l-__f)).
// If __vt points into [__f, __l), then subtract (__f - __r) from __vt.
template <class _Tp, class _Allocator>
typename deque<_Tp, _Allocator>::iterator
deque<_Tp, _Allocator>::__move_and_check(iterator __f, iterator __l, iterator __r,
const_pointer& __vt)
{
// as if
// for (; __f != __l; ++__f, ++__r)
// *__r = _VSTD::move(*__f);
difference_type __n = __l - __f;
while (__n > 0)
{
pointer __fb = __f.__ptr_;
pointer __fe = *__f.__m_iter_ + __block_size;
difference_type __bs = __fe - __fb;
if (__bs > __n)
{
__bs = __n;
__fe = __fb + __bs;
}
if (__fb <= __vt && __vt < __fe)
__vt = (const_iterator(static_cast<__map_const_pointer>(__f.__m_iter_), __vt) -= __f - __r).__ptr_;
__r = _VSTD::move(__fb, __fe, __r);
__n -= __bs;
__f += __bs;
}
return __r;
}
// move assign [__f, __l) to [__r - (__l-__f), __r) backwards.
// If __vt points into [__f, __l), then add (__r - __l) to __vt.
template <class _Tp, class _Allocator>
typename deque<_Tp, _Allocator>::iterator
deque<_Tp, _Allocator>::__move_backward_and_check(iterator __f, iterator __l, iterator __r,
const_pointer& __vt)
{
// as if
// while (__f != __l)
// *--__r = _VSTD::move(*--__l);
difference_type __n = __l - __f;
while (__n > 0)
{
--__l;
pointer __lb = *__l.__m_iter_;
pointer __le = __l.__ptr_ + 1;
difference_type __bs = __le - __lb;
if (__bs > __n)
{
__bs = __n;
__lb = __le - __bs;
}
if (__lb <= __vt && __vt < __le)
__vt = (const_iterator(static_cast<__map_const_pointer>(__l.__m_iter_), __vt) += __r - __l - 1).__ptr_;
__r = _VSTD::move_backward(__lb, __le, __r);
__n -= __bs;
__l -= __bs - 1;
}
return __r;
}
// move construct [__f, __l) to [__r, __r + (__l-__f)).
// If __vt points into [__f, __l), then add (__r - __f) to __vt.
template <class _Tp, class _Allocator>
void
deque<_Tp, _Allocator>::__move_construct_and_check(iterator __f, iterator __l,
iterator __r, const_pointer& __vt)
{
allocator_type& __a = __alloc();
// as if
// for (; __f != __l; ++__r, ++__f, ++__size())
// __alloc_traits::construct(__a, _VSTD::addressof(*__r), _VSTD::move(*__f));
difference_type __n = __l - __f;
while (__n > 0)
{
pointer __fb = __f.__ptr_;
pointer __fe = *__f.__m_iter_ + __block_size;
difference_type __bs = __fe - __fb;
if (__bs > __n)
{
__bs = __n;
__fe = __fb + __bs;
}
if (__fb <= __vt && __vt < __fe)
__vt = (const_iterator(static_cast<__map_const_pointer>(__f.__m_iter_), __vt) += __r - __f).__ptr_;
for (; __fb != __fe; ++__fb, ++__r, ++__size())
__alloc_traits::construct(__a, _VSTD::addressof(*__r), _VSTD::move(*__fb));
__n -= __bs;
__f += __bs;
}
}
// move construct [__f, __l) to [__r - (__l-__f), __r) backwards.
// If __vt points into [__f, __l), then subtract (__l - __r) from __vt.
template <class _Tp, class _Allocator>
void
deque<_Tp, _Allocator>::__move_construct_backward_and_check(iterator __f, iterator __l,
iterator __r, const_pointer& __vt)
{
allocator_type& __a = __alloc();
// as if
// for (iterator __j = __l; __j != __f;)
// {
// __alloc_traitsconstruct(__a, _VSTD::addressof(*--__r), _VSTD::move(*--__j));
// --__start_;
// ++__size();
// }
difference_type __n = __l - __f;
while (__n > 0)
{
--__l;
pointer __lb = *__l.__m_iter_;
pointer __le = __l.__ptr_ + 1;
difference_type __bs = __le - __lb;
if (__bs > __n)
{
__bs = __n;
__lb = __le - __bs;
}
if (__lb <= __vt && __vt < __le)
__vt = (const_iterator(static_cast<__map_const_pointer>(__l.__m_iter_), __vt) -= __l - __r + 1).__ptr_;
while (__le != __lb)
{
__alloc_traits::construct(__a, _VSTD::addressof(*--__r), _VSTD::move(*--__le));
--__start_;
++__size();
}
__n -= __bs;
__l -= __bs - 1;
}
}
template <class _Tp, class _Allocator>
typename deque<_Tp, _Allocator>::iterator
deque<_Tp, _Allocator>::erase(const_iterator __f)
{
iterator __b = begin();
difference_type __pos = __f - __b;
iterator __p = __b + __pos;
allocator_type& __a = __alloc();
if (static_cast<size_t>(__pos) <= (size() - 1) / 2)
{ // erase from front
_VSTD::move_backward(__b, __p, _VSTD::next(__p));
__alloc_traits::destroy(__a, _VSTD::addressof(*__b));
--__size();
++__start_;
__maybe_remove_front_spare();
}
else
{ // erase from back
iterator __i = _VSTD::move(_VSTD::next(__p), end(), __p);
__alloc_traits::destroy(__a, _VSTD::addressof(*__i));
--__size();
__maybe_remove_back_spare();
}
return begin() + __pos;
}
template <class _Tp, class _Allocator>
typename deque<_Tp, _Allocator>::iterator
deque<_Tp, _Allocator>::erase(const_iterator __f, const_iterator __l)
{
difference_type __n = __l - __f;
iterator __b = begin();
difference_type __pos = __f - __b;
iterator __p = __b + __pos;
if (__n > 0)
{
allocator_type& __a = __alloc();
if (static_cast<size_t>(__pos) <= (size() - __n) / 2)
{ // erase from front
iterator __i = _VSTD::move_backward(__b, __p, __p + __n);
for (; __b != __i; ++__b)
__alloc_traits::destroy(__a, _VSTD::addressof(*__b));
__size() -= __n;
__start_ += __n;
while (__maybe_remove_front_spare()) {
}
}
else
{ // erase from back
iterator __i = _VSTD::move(__p + __n, end(), __p);
for (iterator __e = end(); __i != __e; ++__i)
__alloc_traits::destroy(__a, _VSTD::addressof(*__i));
__size() -= __n;
while (__maybe_remove_back_spare()) {
}
}
}
return begin() + __pos;
}
template <class _Tp, class _Allocator>
void
deque<_Tp, _Allocator>::__erase_to_end(const_iterator __f)
{
iterator __e = end();
difference_type __n = __e - __f;
if (__n > 0)
{
allocator_type& __a = __alloc();
iterator __b = begin();
difference_type __pos = __f - __b;
for (iterator __p = __b + __pos; __p != __e; ++__p)
__alloc_traits::destroy(__a, _VSTD::addressof(*__p));
__size() -= __n;
while (__maybe_remove_back_spare()) {
}
}
}
template <class _Tp, class _Allocator>
inline
void
deque<_Tp, _Allocator>::swap(deque& __c)
#if _LIBCPP_STD_VER >= 14
_NOEXCEPT
#else
_NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value ||
__is_nothrow_swappable<allocator_type>::value)
#endif
{
__map_.swap(__c.__map_);
_VSTD::swap(__start_, __c.__start_);
_VSTD::swap(__size(), __c.__size());
_VSTD::__swap_allocator(__alloc(), __c.__alloc());
}
template <class _Tp, class _Allocator>
inline
void
deque<_Tp, _Allocator>::clear() _NOEXCEPT
{
allocator_type& __a = __alloc();
for (iterator __i = begin(), __e = end(); __i != __e; ++__i)
__alloc_traits::destroy(__a, _VSTD::addressof(*__i));
__size() = 0;
while (__map_.size() > 2)
{
__alloc_traits::deallocate(__a, __map_.front(), __block_size);
__map_.pop_front();
}
switch (__map_.size())
{
case 1:
__start_ = __block_size / 2;
break;
case 2:
__start_ = __block_size;
break;
}
}
template <class _Tp, class _Allocator>
inline _LIBCPP_HIDE_FROM_ABI
bool
operator==(const deque<_Tp, _Allocator>& __x, const deque<_Tp, _Allocator>& __y)
{
const typename deque<_Tp, _Allocator>::size_type __sz = __x.size();
return __sz == __y.size() && _VSTD::equal(__x.begin(), __x.end(), __y.begin());
}
#if _LIBCPP_STD_VER <= 17
template <class _Tp, class _Allocator>
inline _LIBCPP_HIDE_FROM_ABI
bool
operator!=(const deque<_Tp, _Allocator>& __x, const deque<_Tp, _Allocator>& __y)
{
return !(__x == __y);
}
template <class _Tp, class _Allocator>
inline _LIBCPP_HIDE_FROM_ABI
bool
operator< (const deque<_Tp, _Allocator>& __x, const deque<_Tp, _Allocator>& __y)
{
return _VSTD::lexicographical_compare(__x.begin(), __x.end(), __y.begin(), __y.end());
}
template <class _Tp, class _Allocator>
inline _LIBCPP_HIDE_FROM_ABI
bool
operator> (const deque<_Tp, _Allocator>& __x, const deque<_Tp, _Allocator>& __y)
{
return __y < __x;
}
template <class _Tp, class _Allocator>
inline _LIBCPP_HIDE_FROM_ABI
bool
operator>=(const deque<_Tp, _Allocator>& __x, const deque<_Tp, _Allocator>& __y)
{
return !(__x < __y);
}
template <class _Tp, class _Allocator>
inline _LIBCPP_HIDE_FROM_ABI
bool
operator<=(const deque<_Tp, _Allocator>& __x, const deque<_Tp, _Allocator>& __y)
{
return !(__y < __x);
}
#else // _LIBCPP_STD_VER <= 17
template<class _Tp, class _Allocator>
inline _LIBCPP_HIDE_FROM_ABI
__synth_three_way_result<_Tp>
operator<=>(const deque<_Tp, _Allocator>& __x, const deque<_Tp, _Allocator>& __y)
{
return std::lexicographical_compare_three_way(
__x.begin(), __x.end(), __y.begin(), __y.end(), std::__synth_three_way<_Tp, _Tp>);
}
#endif // _LIBCPP_STD_VER <= 17
template <class _Tp, class _Allocator>
inline _LIBCPP_HIDE_FROM_ABI
void
swap(deque<_Tp, _Allocator>& __x, deque<_Tp, _Allocator>& __y)
_NOEXCEPT_(_NOEXCEPT_(__x.swap(__y)))
{
__x.swap(__y);
}
#if _LIBCPP_STD_VER >= 20
template <class _Tp, class _Allocator, class _Up>
inline _LIBCPP_HIDE_FROM_ABI typename deque<_Tp, _Allocator>::size_type
erase(deque<_Tp, _Allocator>& __c, const _Up& __v) {
auto __old_size = __c.size();
__c.erase(_VSTD::remove(__c.begin(), __c.end(), __v), __c.end());
return __old_size - __c.size();
}
template <class _Tp, class _Allocator, class _Predicate>
inline _LIBCPP_HIDE_FROM_ABI typename deque<_Tp, _Allocator>::size_type
erase_if(deque<_Tp, _Allocator>& __c, _Predicate __pred) {
auto __old_size = __c.size();
__c.erase(_VSTD::remove_if(__c.begin(), __c.end(), __pred), __c.end());
return __old_size - __c.size();
}
template <>
inline constexpr bool __format::__enable_insertable<std::deque<char>> = true;
#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
template <>
inline constexpr bool __format::__enable_insertable<std::deque<wchar_t>> = true;
#endif
#endif // _LIBCPP_STD_VER >= 20
_LIBCPP_END_NAMESPACE_STD
#if _LIBCPP_STD_VER >= 17
_LIBCPP_BEGIN_NAMESPACE_STD
namespace pmr {
template <class _ValueT>
using deque = std::deque<_ValueT, polymorphic_allocator<_ValueT>>;
} // namespace pmr
_LIBCPP_END_NAMESPACE_STD
#endif
_LIBCPP_POP_MACROS
#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
# include <algorithm>
# include <atomic>
# include <concepts>
# include <cstdlib>
# include <functional>
# include <iosfwd>
# include <iterator>
# include <type_traits>
# include <typeinfo>
#endif
#endif // _LIBCPP_DEQUE