std::basic_const_iterator<Iter>::operator==,<,<=,>,>=,<=>

 

C++

编译器支持

自立实现与有宿主实现

语言

标准库

标准库标头

具名要求

功能特性测试宏 (C++20)

语言支持库

概念库 (C++20)

诊断库

内存管理库

元编程库 (C++11)

通用工具库

容器库

迭代器库

范围库 (C++20)

算法库

字符串库

文本处理库

数值库

日期和时间库

输入/输出库

文件系统库 (C++17)

并发支持库 (C++11)

执行控制库 (C++26)

技术规范

符号索引

外部库

 

迭代器库

迭代器概念
indirectly_readable (C++20) indirectly_writable (C++20) weakly_incrementable (C++20) incrementable (C++20) is-integer-like is-signed-integer-like (C++20)(C++20)	sentinel_for (C++20) sized_sentinel_for (C++20) input_iterator (C++20) output_iterator (C++20) input_or_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
input_iterator_tagoutput_iterator_tagforward_iterator_tagbidirectional_iterator_tagrandom_access_iterator_tagcontiguous_iterator_tag (C++20)	iter_value_titer_difference_titer_reference_titer_const_reference_titer_rvalue_reference_titer_common_reference_t (C++20)(C++20)(C++20)(C++23)(C++20)(C++20)	iterator (C++17 弃用) iterator_traits incrementable_traits (C++20) indirectly_readable_traits (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 (C++20)	projected (C++20)	projected_value_t (C++26)
迭代器适配器
reverse_iterator make_reverse_iterator (C++14) move_iterator (C++11) make_move_iterator (C++11) default_sentinel_tdefault_sentinel (C++20)(C++20) unreachable_sentinel_tunreachable_sentinel (C++20)(C++20)	front_insert_iterator back_insert_iterator inserter insert_iterator front_inserter back_inserter move_sentinel (C++20)	common_iterator (C++20) counted_iterator (C++20) basic_const_iterator (C++23) const_iterator (C++23) const_sentinel (C++23) make_const_iterator (C++23) make_const_sentinel (C++23)
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) rbegincrbegin (C++14)(C++14)   endcend (C++11)(C++14) rendcrend (C++14)(C++14)   sizessize (C++17)(C++20) empty (C++17) data (C++17)

 

std::basic_const_iterator

成员函数

basic_const_iterator::basic_const_iterator

basic_const_iterator::base

basic_const_iterator::operator*basic_const_iterator::operator->

basic_const_iterator::operator[]

basic_const_iterator::operator++basic_const_iterator::operator+=basic_const_iterator::operator--basic_const_iterator::operator-=

basic_const_iterator::operator==basic_const_iterator::operator<basic_const_iterator::operator<=basic_const_iterator::operator>basic_const_iterator::operator>=basic_const_iterator::operator<=>

basic_const_iterator::operator constant-iterator

非成员函数

operator<operator<=operator>operator>= (C++23)(C++23)(C++23)(C++23)

operator+ (C++23)

operator- (C++23)

iter_move(std::basic_const_iterator) (C++23)

辅助类

common_type<std::basic_const_iterator> (C++23)

 

<tbody> </tbody>

相等性比较
template< std::sentinel_for<Iter> S > constexpr bool operator==( const S& s ) const;	(1)	(C++23 起)
两个 basic_const_iterator 之间的关系比较
constexpr bool operator<( const basic_const_iterator& y ) const requires std::random_access_iterator<Iter>;	(2)	(C++23 起)
constexpr bool operator>( const basic_const_iterator& y ) const requires std::random_access_iterator<Iter>;	(3)	(C++23 起)
constexpr bool operator<=( const basic_const_iterator& y ) const requires std::random_access_iterator<Iter>;	(4)	(C++23 起)
constexpr bool operator>=( const basic_const_iterator& y ) const requires std::random_access_iterator<Iter>;	(5)	(C++23 起)
constexpr auto operator<=>( const basic_const_iterator& y ) const requires std::random_access_iterator<Iter> && std::three_way_comparable<Iter>;	(6)	(C++23 起)
basic_const_iterator 和另一类型之间的关系比较
template< /*different-from*/<basic_const_iterator> I > constexpr bool operator<( const I& y ) const requires std::random_access_iterator<Iter> && std::totally_ordered_with<Iter, I>;	(7)	(C++23 起)
template< /*different-from*/<basic_const_iterator> I > constexpr bool operator>( const I& y ) const requires std::random_access_iterator<Iter> && std::totally_ordered_with<Iter, I>;	(8)	(C++23 起)
template< /*different-from*/<basic_const_iterator> I > constexpr bool operator<=( const I& y ) const requires std::random_access_iterator<Iter> && std::totally_ordered_with<Iter, I>;	(9)	(C++23 起)
template< /*different-from*/<basic_const_iterator> I > constexpr bool operator>=( const I& y ) const requires std::random_access_iterator<Iter> && std::totally_ordered_with<Iter, I>;	(10)	(C++23 起)
template< /*different-from*/<basic_const_iterator> I > constexpr auto operator<=>( const I& y ) const requires std::random_access_iterator<Iter> && std::totally_ordered_with<Iter, I> && std::three_way_comparable_with<Iter, I>;	(11)	(C++23 起)

比较 basic_const_iterator 和另一个值。

!= 运算符从 operator== 运算符合成。

当 std::same_as<I, basic_const_iterator<Iter>> 为 false 时 I 满足 /*different-from*/<basic_const_iterator>。

参数

s	-	Iter 的哨位
y	-	要与之比较的值

返回值

1) base() == s

2) base() < y.base()

3) base() > y.base()

4) base() <= y.base()

5) base() >= y.base()

6) base() <=> y.base()

7) base() < y

8) base() > y

9) base() <= y

10) base() >= y

11) base() <=> y

注解

当 Iter 实现了 sentinel_for<Iter> 时，重载 (1) 可用于比较两个 basic_const_iterator<Iter> 值。