operator-(ranges::chunk_view::outer-iterator)

 

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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)

悬空迭代器处理 悬空 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

帮助项目
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)

 

friend constexpr difference_type operator-( std::default_sentinel_t s,                                             const /*outer-iterator*/& i )     requires ranges::sized_sentinel_for<ranges::sentinel_t<V>,                                         ranges::iterator_t<V>>;	(1)	(自 C++23 起)
friend constexpr difference_type operator-( const /*outer-iterator*/& i,                                             std::default_sentinel_t s )     requires ranges::sized_sentinel_for<ranges::sentinel_t<V>,                                         ranges::iterator_t<V>>;	(2)	(自 C++23 起)

计算 迭代器 和 哨兵 之间的距离（以块数表示）。

令 parent_ 为封闭 chunk_view 的基础指针。

1) 等效于

const auto dist = ranges::end(i.parent_->base_) - *i.parent_->current_;
if (dist < i.parent_->remainder_)
    return dist == 0 ? 0 : 1;
return /*div-ceil*/(dist - i.parent_->remainder_, i.parent_->n_) + 1;

2) 等效于： return -(s - i);.

这些函数对普通的 非限定 或 限定查找 不可見，并且只有在 std::ranges::chunk_view::outer-iterator 是参数的关联类时，才能通过 参数相关查找 找到。

参数

i	-	the iterator
s	-	the sentinel

返回值

给定迭代器和哨兵之间的距离。

另请参阅

operator++ (C++23)

递增迭代器 (公共成员函数)