operator==,<,>,<=,>=,<=>(ranges::concat_view::iterator)

 

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

 

范围库

范围访问 begin cbegin   end cend rbegin crbegin   rend crend size ssize   data cdata reserve_hint (C++26)   empty

范围转换 std::from_range_t std::from_range (C++23)(C++23)     to (C++23)

悬垂迭代器处理 dangling borrowed_iterator_t borrowed_subrange_t

范围原语
range_size_trange_difference_trange_value_t elements_of (C++23)	iterator_tconst_iterator_tsentinel_tconst_sentinel_t (C++23)(C++23)	range_reference_trange_const_reference_trange_rvalue_reference_trange_common_reference_t (C++23)

范围概念
range borrowed_range    common_range	sized_range viewable_range    view	input_range output_range forward_range	bidirectional_range    random_access_range contiguous_range	approximately_sized_range (C++26) constant_range (C++23)

视图
view_interface	subrange

范围工厂
empty_viewviews::empty	single_viewviews::single	basic_istream_viewviews::istream	iota_viewviews::iota	repeat_viewviews::repeat (C++23)(C++23)

范围适配器
views::all_tviews::all as_rvalue_viewviews::as_rvalue (C++23)(C++23)   filter_viewviews::filter transform_viewviews::transform take_viewviews::take take_while_viewviews::take_while common_viewviews::common views::counted to_input_viewviews::to_input (C++26)(C++26)	ref_view drop_viewviews::drop drop_while_viewviews::drop_while lazy_split_viewviews::lazy_split split_viewviews::split join_viewviews::join join_with_viewviews::join_with (C++23)(C++23)   concat_viewviews::concat (C++26)(C++26) cache_latest_viewviews::cache_latest (C++26)(C++26)	owning_view reverse_viewviews::reverse as_const_viewviews::as_const (C++23)(C++23) elements_viewviews::elements keys_viewviews::keys values_viewviews::values enumerate_viewviews::enumerate (C++23)(C++23) zip_viewviews::zip (C++23)(C++23) zip_transform_viewviews::zip_transform (C++23)(C++23)	adjacent_viewviews::adjacent (C++23)(C++23) views::pairwise (C++23) adjacent_transform_viewviews::adjacent_transform (C++23)(C++23) views::pairwise_transform (C++23) chunk_viewviews::chunk (C++23)(C++23) slide_viewviews::slide (C++23)(C++23) chunk_by_viewviews::chunk_by (C++23)(C++23) stride_viewviews::stride (C++23)(C++23) cartesian_product_viewviews::cartesian_product (C++23)(C++23)

范围生成器 std::generator (C++23)

范围适配器闭包对象 range_adaptor_closure (C++23)

范围适配器对象

辅助项
copyable-box movable-box (C++23 前)  (C++23)	simple-view non-propagating-cache

 

std::ranges::concat_view

成员函数

concat_view::concat_view

concat_view::begin

concat_view::end

concat_view::size

推导指引

迭代器

成员函数

concat_view::iterator::iterator

concat_view::iterator::operator*

concat_view::iterator::operator[]

concat_view::iterator::operator++ concat_view::iterator::operator++(int) concat_view::iterator::operator-- concat_view::iterator::operator--(int) concat_view::iterator::operator+= concat_view::iterator::operator-=

concat_view::iterator::satisfy concat_view::iterator::prev concat_view::iterator::advance-fwd concat_view::iterator::advance-bwd

非成员函数

operator==(concat_view::iterator) operator<(concat_view::iterator) operator>(concat_view::iterator) operator<=(concat_view::iterator) operator>=(concat_view::iterator) operator<=>(concat_view::iterator)

operator+(concat_view::iterator) operator-(concat_view::iterator)

iter_move(concat_view::iterator)

iter_swap(concat_view::iterator)

 

friend constexpr bool operator== ( const /*iterator*/& x, std::default_sentinel_t );	(1)	(C++26 起)
friend constexpr bool operator== ( const /*iterator*/& x, const /*iterator*/& y ) requires (std::equality_comparable<ranges::iterator_t< std::conditional_t<Const, const Views, Views>>> && ...);	(2)	(C++26 起)
friend constexpr bool operator< ( const /*iterator*/& x, const /*iterator*/& y ) requires /*all-random-access*/<Const, Views...>;	(3)	(C++26 起)
friend constexpr bool operator> ( const /*iterator*/& x, const /*iterator*/& y ) requires /*all-random-access*/<Const, Views...>;	(4)	(C++26 起)
friend constexpr bool operator<= ( const /*iterator*/& x, const /*iterator*/& y ) requires /*all-random-access*/<Const, Views...>;	(5)	(C++26 起)
friend constexpr bool operator>= ( const /*iterator*/& x, const /*iterator*/& y ) requires /*all-random-access*/<Const, Views...>;	(6)	(C++26 起)
friend constexpr auto operator<=> ( const /*iterator*/& x, const /*iterator*/& y ) requires (/*all-random-access*/<Const, Views...> && (std::three_way_comparable<ranges::iterator_t< std::conditional_t<Const, const Views, Views>>> && ...));	(7)	(C++26 起)

将迭代器与另一个迭代器或哨位进行比较。

1) 比较一个迭代器与一个哨位。

如果 x.it_ .valueless_by_exception() 是 true，那么行为未定义。

2-7) 比较两个迭代器。!= 运算符从 operator== 运算符合成。

如果 x.it_ .valueless_by_exception() || y.it_ .valueless_by_exception() 是 true，那么行为未定义。

这些函数对常规的无限定或有限定查找不可见，而只能在 std::ranges::concat_view::iterator <Const> 为实参的关联类时由实参依赖查找找到。

参数

x, y

-

要比较的迭代器

返回值

1)

x.it_ .index() == (sizeof...(Views) - 1) &&
    x.get-iter <sizeof...(Views) - 1>() == x.get-end <sizeof...(Views) - 1>()

2) x.it_ == y.it_

3) x.it_ < y.it_

4) x.it_ > y.it_

5) x.it_ <= y.it_

6) x.it_ >= y.it_

7) x.it_ <=> y.it_

示例