std::ranges::chunk_by_view<V,Pred>::iterator::operator++,--

 

C++

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自立实现与有宿主实现

语言

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具名要求

功能特性测试宏 (C++20)

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概念库 (C++20)

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内存管理库

元编程库 (C++11)

通用工具库

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范围库 (C++20)

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文件系统库 (C++17)

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执行控制库 (C++26)

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 reserve_hint (C++26)   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    common_range	sized_range viewable_range    view	input_range output_range forward_range	bidirectional_range    random_access_range contiguous_range	approximately_sized_range (C++26) 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 as_rvalue_viewviews::as_rvalue (C++23)(C++23)   filter_viewviews::filter transform_viewviews::transform take_viewviews::take take_while_viewviews::take_while common_viewviews::common views::counted to_input_viewviews::to_input (C++26)(C++26)	ref_view drop_viewviews::drop drop_while_viewviews::drop_while lazy_split_viewviews::lazy_split split_viewviews::split join_viewviews::join join_with_viewviews::join_with (C++23)(C++23)   concat_viewviews::concat (C++26)(C++26) cache_latest_viewviews::cache_latest (C++26)(C++26)	owning_view 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_by_view

成员函数

chunk_by_view::chunk_by_view

chunk_by_view::base

chunk_by_view::pred

chunk_by_view::begin

chunk_by_view::end

chunk_by_view::find_next

chunk_by_view::find_prev

推导指引

迭代器

chunk_by_view::iterator::iterator

chunk_by_view::iterator::operator*

chunk_by_view::iterator::operator++ chunk_by_view::iterator::operator++(int) chunk_by_view::iterator::operator-- chunk_by_view::iterator::operator--(int)

operator==(chunk_by_view::iterator)

 

constexpr /*iterator*/& operator++();	(1)	(C++23 起)
constexpr /*iterator*/ operator++(int);	(2)	(C++23 起)
constexpr /*iterator*/& operator--() requires ranges::bidirectional_range<V>;	(3)	(C++23 起)
constexpr /*iterator*/ operator--(int) requires ranges::bidirectional_range<V>;	(4)	(C++23 起)

增加或减少迭代器。

令 parent_，和 current_，和 next_ 是 iterator 的适当底层（仅用于阐述的）数据成员。

令 find-next 和 find-prev 是 ranges::chunk_by_view 的适当底层（仅用于阐述的）的成员函数。

1) 等价于：

current_ = next_;
next_ = parent_->/*find-next*/(current_);
return *this;

如果在调用此操作符之前，current_ 等于 next_，则行为未定义。

2) 等价于：auto tmp = *this; ++*this; return tmp;

3) 等价于：

next_ = current_;
current_ = parent_->/*find-prev*/(next_);
return *this;

4) 等价于：auto tmp = *this; --*this; return tmp;

参数

（无）

返回值

1,3) *this

2,4) 更改前的 *this 的副本。