std::ranges::chunk_view<V>::end

 

C++

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特性测试宏 (C++20)

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元编程库 (C++11)

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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 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    sized_range	common_range view viewable_range	input_range output_range forward_range	bidirectional_range    random_access_range contiguous_range	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 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 concat_viewviews::concat (C++26)(C++26)	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)

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

范围适配器对象

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

 

std::ranges::chunk_view

成员函数
chunk_view::chunk_view
chunk_view::base
chunk_view::begin
chunk_view::end
chunk_view::size
用于 input_ranges 的类 推导指南 outer-iterator chunk_view::outer-iterator::outer-iterator chunk_view::outer-iterator::operator= chunk_view::outer-iterator::operator* chunk_view::outer-iterator::operator++ chunk_view::outer-iterator::operator++(int) operator==(chunk_view::outer-iterator) operator-(chunk_view::outer-iterator) outer-iterator::value_type chunk_view::outer-iterator::value_type::value_type   chunk_view::outer-iterator::value_type::begin chunk_view::outer-iterator::value_type::end chunk_view::outer-iterator::value_type::size inner-iterator chunk_view::inner-iterator::inner-iterator chunk_view::inner-iterator::operator= chunk_view::inner-iterator::base chunk_view::inner-iterator::operator* chunk_view::inner-iterator::operator++ chunk_view::inner-iterator::operator++(int) operator==(chunk_view::inner-iterator) operator-(chunk_view::inner-iterator) iter_move(chunk_view::inner-iterator) iter_swap(chunk_view::inner-iterator)	用于 forward_ranges 的类模板 iterator chunk_view::iterator::iterator chunk_view::iterator::base chunk_view::iterator::operator* chunk_view::iterator::operator[] chunk_view::iterator::operator++ chunk_view::iterator::operator++(int) chunk_view::iterator::operator-- chunk_view::iterator::operator--(int) chunk_view::iterator::operator+= chunk_view::iterator::operator-= operator==(chunk_view::iterator) operator<(chunk_view::iterator) operator>(chunk_view::iterator) operator<=(chunk_view::iterator) operator>=(chunk_view::iterator) operator<=>(chunk_view::iterator) operator+(chunk_view::iterator) operator-(chunk_view::iterator)

 

V 仅建模 input_range
constexpr std::default_sentinel_t end() const noexcept;	(1)	(自 C++23 起)
V 建模 forward_range
constexpr auto end() requires (!__simple_view<V>);	(2)	(自 C++23 起)
constexpr auto end() const requires ranges::forward_range<const V>;	(3)	(自 C++23 起)

返回一个与 chunk_view 的末尾迭代器相等的 迭代器 或 std::default_sentinel。

1) 仅在 V 建模 input_range 时可用。等效于：return std::default_sentinel.

2,3) 在 V 建模 forward_range 时可用。让 base_ 表示底层适配视图，n_ 表示存储的块大小，以及 iterator 表示嵌套迭代器类。

2) 等效于

if constexpr (ranges::common_range<V> && ranges::sized_range<V>)
{
    auto missing = (n_ - ranges::distance(base_) % n_) % n_;
    return iterator<false>(this, ranges::end(base_), missing);
}
else if constexpr (ranges::common_range<V> && !ranges::bidirectional_range<V>)
    return iterator<false>(this, ranges::end(base_));
else
    return std::default_sentinel;

3) 等效于

if constexpr (ranges::common_range<const V> && ranges::sized_range<const V>)
{
    auto missing = (n_ - ranges::distance(base_) % n_) % n_;
    return iterator<true>(this, ranges::end(base_), missing);
}
else if constexpr (ranges::common_range<const V> && !ranges::bidirectional_range<const V>)
    return iterator<true>(this, ranges::end(base_));
else
    return std::default_sentinel;

参数

(无)

返回值

如上所述，表示 chunk_view 结束的迭代器或哨兵。

另请参见

begin	返回指向开头的迭代器 (公共成员函数)
ranges::end (C++20)	返回一个指示范围末尾的哨兵 (自定义点对象)