std::ranges::cartesian_product_view<First, Vs...>::iterator<Const>::operator++,--,+=,-=

 

C++

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自立实现与有宿主实现

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标准库标头

具名要求

功能特性测试宏 (C++20)

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概念库 (C++20)

元编程库 (C++11)

诊断库

通用工具库

字符串库

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范围库 (C++20)

算法库

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文件系统库 (C++17)

正则表达式库 (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 (C++23 前)  (C++23)	simple-view non-propagating-cache

 

std::ranges::cartesian_product_view

成员函数

cartesian_product_view::cartesian_product_view

cartesian_product_view::begin

cartesian_product_view::end

cartesian_product_view::size

推导指引

迭代器

成员函数

cartesian_product_view::iterator::iterator

cartesian_product_view::iterator::operator*

cartesian_product_view::iterator::operator[]

cartesian_product_view::iterator::operator++ cartesian_product_view::iterator::operator++(int) cartesian_product_view::iterator::operator-- cartesian_product_view::iterator::operator--(int) cartesian_product_view::iterator::operator+= cartesian_product_view::iterator::operator-=

cartesian_product_view::iterator::next

cartesian_product_view::iterator::prev

cartesian_product_view::iterator::distance_from

非成员函数

operator==(cartesian_product_view::iterator) operator<=>(cartesian_product_view::iterator)

operator+(cartesian_product_view::iterator) operator-(cartesian_product_view::iterator)

iter_move(cartesian_product_view::iterator)

iter_swap(cartesian_product_view::iterator)

 

constexpr /*iterator*/& operator++();	(1)	(C++23 起)
constexpr void operator++( int );	(2)	(C++23 起)
constexpr /*iterator*/ operator++( int )     requires ranges::forward_range</*maybe-const*/<Const, First>>;	(3)	(C++23 起)
constexpr /*iterator*/& operator--()     requires /*cartesian-product-is-bidirectional*/<Const, First, Vs...>;	(4)	(C++23 起)
constexpr /*iterator*/ operator--( int )     requires /*cartesian-product-is-bidirectional*/<Const, First, Vs...>;	(5)	(C++23 起)
constexpr /*iterator*/& operator+=( difference_type n )     requires /*cartesian-product-is-random-access*/<Const, First, Vs...>;	(6)	(C++23 起)
constexpr /*iterator*/& operator-=( difference_type n )     requires /*cartesian-product-is-random-access*/<Const, First, Vs...>;	(7)	(C++23 起)

增加或减少迭代器。

令 current_ 代表底层的迭代器元组，并令 parent_ 代表指向 cartesian_product_view 的底层指针。

1) 等价于 next(); return *this;

2) 等价于 ++*this;

3) 等价于 auto tmp = *this; ++*this; return tmp;

4) 等价于 prev(); return *this;

5) 等价于 auto tmp = *this; --*this; return tmp;

6) 将 *this 的值设为 ret，其中 ret 是：

• 若 n > 0，是 *this 在 next 被调用 n 次之后的值。否则
• 若 n < 0，是 *this 在 prev 被调用 n 次之后的值。否则
• 是调用之前的 *this 的值。

若 n 不在范围 [ranges::distance(*this, ranges::begin(*parent_)), ranges::distance(*this, ranges::end(*parent_))) 中则行为未定义。

7) 等价于 *this += -n; return *this;。

参数

n

-

相对于当前位置的偏移

返回值

1,4,6,7) *this

2) (无)

3,5) *this 改变前的副本。

复杂度

6) 常数。

参阅

operator+operator- (C++23)

进行迭代器算术 (函数)