operator==,<,>,<=,>=,<=>(ranges::transform_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)

元编程库 (C++11)

诊断库

通用工具库

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)

并发支持库 (C++11)

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	empty
范围转换器
to (C++23)
范围原语
range_size_trange_difference_t range_value_t	range_reference_trange_const_reference_trange_rvalue_reference_t (C++23)	iterator_tconst_iterator_tsentinel_t (C++23)
悬垂迭代器处理
dangling	borrowed_iterator_t	borrowed_subrange_t
范围概念
range borrowed_range    sized_range constant_range (C++23)	common_range view viewable_range	input_range output_range forward_range	bidirectional_range random_access_range contiguous_range
视图
view_interface	subrange
范围工厂
empty_viewviews::empty single_viewviews::single	iota_viewviews::iota repeat_viewviews::repeat (C++23)(C++23)	basic_istream_viewviews::istream cartesian_product_viewviews::cartesian_product_view (C++23)(C++23)
适配器
views::all_tviews::all ref_view owning_view as_rvalue_viewviews::as_rvalue (C++23)(C++23)   filter_viewviews::filter transform_viewviews::transform take_viewviews::take take_while_viewviews::take_while	drop_viewviews::drop drop_while_viewviews::drop_while join_viewviews::join join_with_viewviews::join_with (C++23)(C++23) lazy_split_viewviews::lazy_split split_viewviews::split views::counted common_viewviews::common	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)
范围适配器对象
范围适配器闭包对象
range_adaptor_closure (C++23)
辅助项
copyable-box	simple-view

 

std::ranges::transform_view

成员函数

transform_view::transform_view

transform_view::base

transform_view::begin

transform_view::end

transform_view::size

推导指引

迭代器

transform_view::iterator::iterator

transform_view::iterator::base

transform_view::iterator::operator*

transform_view::iterator::operator[]

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

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

operator+(transform_view::iterator) operator-(transform_view::iterator)

iter_move(transform_view::iterator)

哨位

transform_view::sentinel::sentinel

transform_view::sentinel::base

operator==(transform_view::iterator,transform_view::sentinel)

operator-(transform_view::iterator,transform_view::sentinel)

 

friend constexpr bool operator==( const /*iterator*/& x, const /*iterator*/& y )   requires std::equality_comparable<ranges::iterator_t<Base>>;	(1)	(C++20 起)
friend constexpr bool operator<( const /*iterator*/& x, const /*iterator*/& y )   requires ranges::random_access_range<Base>;	(2)	(C++20 起)
friend constexpr bool operator>( const /*iterator*/& x, const /*iterator*/& y )   requires ranges::random_access_range<Base>;	(3)	(C++20 起)
friend constexpr bool operator<=( const /*iterator*/& x, const /*iterator*/& y )   requires ranges::random_access_range<Base>;	(4)	(C++20 起)
friend constexpr bool operator>=( const /*iterator*/& x, const /*iterator*/& y )   requires ranges::random_access_range<Base>;	(5)	(C++20 起)
friend constexpr auto operator<=>( const /*iterator*/& x, const /*iterator*/& y )   requires ranges::random_access_range<Base> &&            std::three_way_comparable<ranges::iterator_t<Base>>;	(6)	(C++20 起)

比较底层迭代器。

1) 等价于 return x.current_ == y.current_; ，其中 current_ 是底层迭代器。

2) 等价于 return x.current_ < y.current_; ，其中 current_ 是底层迭代器。

3) 等价于 return y < x;

4) 等价于 return !(y < x);

5) 等价于 return !(x < y);

6) 等价于 return x.current_ <=> y.current_; ，其中 current_ 是底层迭代器。

这些函数对通常无限定或有限定查找不可见，而只能在 std::ranges::transform_view::iterator<Const> 为参数的关联类时由实参依赖查找找到。

!= 运算符从 == 运算符合成。

参数

x, y

-

要比较的迭代器

返回值

比较结果