operator==,!=,<,<=,>,>=,<=>(std::move_iterator)

 

C++

语言

标准库头文件

自立与有宿主实现

具名要求

语言支持库

概念库 (C++20)

诊断库

工具库

字符串库

容器库

迭代器库

范围库 (C++20)

算法库

数值库

本地化库

输入/输出库

文件系统库 (C++17)

正则表达式库 (C++11)

原子操作库 (C++11)

线程支持库 (C++11)

技术规范

 

迭代器库

迭代器概念
indirectly_readable (C++20) indirectly_writable (C++20) weakly_incrementable (C++20) incrementable (C++20) input_or_output_iterator (C++20) sentinel_for (C++20) sized_sentinel_for (C++20)	input_iterator (C++20) output_iterator (C++20) forward_iterator (C++20) bidirectional_iterator (C++20) random_access_iterator (C++20) contiguous_iterator (C++20)
迭代器原语
iterator_traits input_iterator_tagoutput_iterator_tagforward_iterator_tagbidirectional_iterator_tagrandom_access_iterator_tagcontiguous_iterator_tag (C++20) iterator (C++17 中弃用)	incrementable_traits (C++20) indirectly_readable_traits (C++20) iter_value_titer_difference_titer_reference_titer_rvalue_reference_titer_common_reference_t (C++20)(C++20)(C++20)(C++20)(C++20)
算法概念与工具
间接可调用概念
indirectly_unary_invocableindirectly_regular_unary_invocable (C++20)(C++20) indirect_unary_predicate (C++20)	indirect_binary_predicate (C++20) indirect_equivalence_relation (C++20) indirect_strict_weak_order (C++20)
常用算法要求
indirectly_movable (C++20) indirectly_movable_storable (C++20) indirectly_copyable (C++20) indirectly_copyable_storable (C++20)	indirectly_swappable (C++20) indirectly_comparable (C++20) permutable (C++20) mergeable (C++20) sortable (C++20)
工具
indirect_result_t	projected
迭代器适配器
reverse_iterator move_iterator (C++11) move_sentinel (C++20) common_iterator (C++20) counted_iterator (C++20) back_insert_iterator front_insert_iterator insert_iterator	make_reverse_iterator (C++14) make_move_iterator (C++11) default_sentinel_tdefault_sentinel (C++20)(C++20) unreachable_sentinel_tunreachable_sentinel (C++20)(C++20) back_inserter front_inserter inserter
流迭代器
istream_iterator ostream_iterator	istreambuf_iterator ostreambuf_iterator
迭代器定制点
ranges::iter_move (C++20)
ranges::iter_swap (C++20)
迭代器操作
advance distance prev (C++11) next (C++11)	ranges::advance (C++20) ranges::distance (C++20) ranges::prev (C++20) ranges::next (C++20)
范围访问
begincbegin (C++11)(C++14) endcend (C++11)(C++14) sizessize (C++17)(C++20)	rbegincrbegin (C++14)(C++14) rendcrend (C++14)(C++14) empty (C++17) data (C++17)

 

std::move_iterator

成员函数

move_iterator::move_iterator

move_iterator::operator=

move_iterator::base

move_iterator::operator*move_iterator::operator->

move_iterator::operator[]

move_iterator::operator++move_iterator::operator+move_iterator::operator+=move_iterator::operator--move_iterator::operator-move_iterator::operator-=

非成员函数

operator==operator!=operator<operator<=operator>operator>=operator<=> (C++20 前)(C++20)

operator==(move_sentinel) (C++20)

operator+

operator-

operator-(move_sentinel) (C++20)

iter_move (C++20)

iter_swap (C++20)

 

	(1)
template< class Iterator1, class Iterator2 > bool operator==( const std::move_iterator<Iterator1>& lhs,                  const std::move_iterator<Iterator2>& rhs );			(C++17 前)
template< class Iterator1, class Iterator2 > constexpr bool operator==( const std::move_iterator<Iterator1>& lhs,                            const std::move_iterator<Iterator2>& rhs );			(C++17 起)
		(2)
template< class Iterator1, class Iterator2 > bool operator!=( const std::move_iterator<Iterator1>& lhs,                  const std::move_iterator<Iterator2>& rhs );				(C++17 前)
template< class Iterator1, class Iterator2 > constexpr bool operator!=( const std::move_iterator<Iterator1>& lhs,                            const std::move_iterator<Iterator2>& rhs );				(C++17 起) (C++20 前)
			(3)
template< class Iterator1, class Iterator2 > bool operator<( const std::move_iterator<Iterator1>& lhs,                 const std::move_iterator<Iterator2>& rhs );					(C++17 前)
template< class Iterator1, class Iterator2 > constexpr bool operator<( const std::move_iterator<Iterator1>& lhs,                           const std::move_iterator<Iterator2>& rhs );					(C++17 起)
				(4)
template< class Iterator1, class Iterator2 > bool operator<=( const std::move_iterator<Iterator1>& lhs,                  const std::move_iterator<Iterator2>& rhs );						(C++17 前)
template< class Iterator1, class Iterator2 > constexpr bool operator<=( const std::move_iterator<Iterator1>& lhs,                            const std::move_iterator<Iterator2>& rhs );						(C++17 起)
					(5)
template< class Iterator1, class Iterator2 > bool operator>( const std::move_iterator<Iterator1>& lhs,                 const std::move_iterator<Iterator2>& rhs );							(C++17 前)
template< class Iterator1, class Iterator2 > constexpr bool operator>( const std::move_iterator<Iterator1>& lhs,                           const std::move_iterator<Iterator2>& rhs );							(C++17 起)
						(6)
template< class Iterator1, class Iterator2 > bool operator>=( const std::move_iterator<Iterator1>& lhs,                  const std::move_iterator<Iterator2>& rhs );								(C++17 前)
template< class Iterator1, class Iterator2 > constexpr bool operator>=( const std::move_iterator<Iterator1>& lhs,                            const std::move_iterator<Iterator2>& rhs );								(C++17 起)
template<class Iterator1, std::three_way_comparable_with<Iterator1> Iterator2> constexpr std::compare_three_way_result_t<Iterator1, Iterator2>     operator<=>( const std::move_iterator<Iterator1>& x,                  const std::move_iterator<Iterator2>& y );							(7)	(C++20 起)

比较底层迭代器。

(1-6) 仅若其底层比较表达式（见后述）为良构且可转换为 bool 才参与重载决议。 != 运算符从 operator== 合成。

(C++20 起)

参数

lhs, rhs

-

要比较的迭代器适配器

返回值

1) lhs.base() == rhs.base()

2) !(lhs == rhs)

3) lhs.base() < rhs.base()

4) !(rhs < lhs)

5) rhs < lhs

6) !(lhs < rhs)

7) lhs.base() <=> rhs.base()