operator+,-(ranges::chunk_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

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本地化库

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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 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 (C++23 前)  (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
input_range 类 推导指引 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)	forward_range 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 /*iterator*/ operator+( const /*iterator*/& i,                                          difference_type pos )     requires ranges::random_access_range<Base>;	(1)	(C++23 起)
friend constexpr /*iterator*/ operator+( difference_type pos,                                          const /*iterator*/& i )     requires ranges::random_access_range<Base>;	(2)	(C++23 起)
friend constexpr /*iterator*/ operator-( const /*iterator*/& i,                                          difference_type pos )     requires ranges::random_access_range<Base>;	(3)	(C++23 起)
friend constexpr difference_type operator-( const /*iterator*/& i,                                             const /*iterator*/& j )     requires ranges::sized_sentinel_for<ranges::iterator_t<Base>,                                         ranges::iterator_t<Base>>;	(4)	(C++23 起)
friend constexpr difference_type operator-( std::default_sentinel_t,                                             const /*iterator*/& i )     requires ranges::sized_sentinel_for<ranges::sentinel_t<Base>,                                         ranges::iterator_t<Base>>;	(5)	(C++23 起)
friend constexpr difference_type operator-( const /*iterator*/& i,                                             std::default_sentinel_t )     requires ranges::sized_sentinel_for<ranges::sentinel_t<Base>,                                         ranges::iterator_t<Base>>;	(6)	(C++23 起)

执行迭代器算数或计算距离。

令 current_，end_，n_，和 missing_ 为底层数据成员。

等价于：

1,2) auto r = i; r += pos; return r;。

3) auto r = i; r -= pos; return r;。

4) return (i.current_ - j.current_ + i.missing_ - j.missing_) / i.n_;。

5) return /*div-ceil*/(i.end_ - i.current_, i.n_);。

6) return -(y - x);。

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

参数

i, j	-	迭代器
pos	-	相对于当前位置的偏移量

返回值

1,2) 增加后的迭代器

3) 减少后的迭代器

4) 给定迭代器之间的距离（以元素数量，即块为单位）

5,6) 迭代器与哨位之间的距离（以元素数量为单位）

参阅

operator++operator++(int)operator--operator--(int)operator+=operator-=

推进或减小底层迭代器 (公开成员函数)