operator-(ranges::enumerate_view::sentinel)

 

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功能特性测试宏 (C++20)

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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)
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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::enumerate_view

成员函数

enumerate_view::enumerate_view (C++23)

enumerate_view::base (C++23)

enumerate_view::begin (C++23)

enumerate_view::end (C++23)

enumerate_view::size (C++23)

推导指引

嵌套类

迭代器

enumerate_view::iterator::iterator (C++23)

enumerate_view::iterator::base (C++23)

enumerate_view::iterator::index (C++23)

enumerate_view::iterator::operator* (C++23)

enumerate_view::iterator::operator[] (C++23)

enumerate_view::iterator::operator++ enumerate_view::iterator::operator++(int) enumerate_view::iterator::operator-- enumerate_view::iterator::operator--(int) enumerate_view::iterator::operator+= enumerate_view::iterator::operator-= (C++23)(C++23)(C++23)(C++23)(C++23)(C++23)

operator==(enumerate_view::iterator) operator<=>(enumerate_view::iterator) (C++23)(C++23)

operator+(enumerate_view::iterator) operator-(enumerate_view::iterator) (C++23)(C++23)

iter_move(enumerate_view::iterator) (C++23)

哨位

enumerate_view::sentinel::sentinel (C++23)

enumerate_view::sentinel::base (C++23)

operator==(enumerate_view::iterator,enumerate_view::sentinel) (C++23)

operator-(enumerate_view::iterator,enumerate_view::sentinel) (C++23)

 

template< bool OtherConst >     requires std::sized_sentinel_for<                  ranges::sentinel_t<Base>,                  ranges::iterator_t</*或许为 const*/<OtherConst, V>>> friend constexpr ranges::range_difference_t</*或许为 const*/<OtherConst, V>>     operator-( const /*iterator*/<OtherConst>& x, const /*sentinel*/& y );	(1)	(C++23 起)
template< bool OtherConst >     requires std::sized_sentinel_for<                  ranges::sentinel_t<Base>,                  ranges::iterator_t</*或许为 const*/<OtherConst, V>>> friend constexpr ranges::range_difference_t</*或许为 const*/<OtherConst, V>>     operator-( const /*sentinel*/& y, const /*iterator*/<OtherConst>& x );	(2)	(C++23 起)

计算 x 的底层迭代器和 y 的底层哨位之间的距离。

这些函数模板对通常无限定或有限定查找不可见，而只能在 enumerate_view::sentinel 为参数的关联类时由实参依赖查找找到。

参数

x	-	迭代器
y	-	哨位

返回值

1) x.base() - y.base()

2) y.base() - x.base()