std::ranges::chunk_view<V>::iterator<Const>::operator++,--,+=,-=

 

C++

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功能特性测试宏 (C++20)

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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 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) sized-random-access-range (C++26)

视图
view_interface	subrange

范围工厂
empty_viewviews::empty	single_viewviews::single	basic_istream_viewviews::istream	iota_viewviews::iota views::indices (C++26)	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 as_input_viewviews::as_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_view

成员函数
chunk_view::chunk_view
chunk_view::base
chunk_view::begin
chunk_view::end
chunk_view::size
chunk_view::reserve_hint (C++26)
用于 input_range 的类 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)	用于 forward_range 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)

 

constexpr /*iterator*/& operator++();	(1)	(C++23 起)
constexpr /*iterator*/ operator++( int );	(2)	(C++23 起)
constexpr /*iterator*/& operator--() requires ranges::bidirectional_range<Base>;	(3)	(C++23 起)
constexpr /*iterator*/ operator--( int ) requires ranges::bidirectional_range<Base>;	(4)	(C++23 起)
constexpr /*iterator*/& operator+=( difference_type x ) requires ranges::random_access_range<Base>;	(5)	(C++23 起)
constexpr /*iterator*/& operator-=( difference_type x ) requires ranges::random_access_range<Base>;	(6)	(C++23 起)

递增或递减迭代器。

令 current_，end_，n_ 为 chunk_view::iterator 的底层数据成员。

1) 等价于：

missing_ = ranges::advance(current_, n_, end_);
return *this;

调用前，表达式 current_ != end_ 必须为 true，否则其行为未定义。

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

3) 等价于：

ranges::advance(current_, missing_ - n_);
missing_ = 0;
return *this;

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

5) 等价于：

if (x > 0)
{
    ranges::advance(current_, n_ * (x - 1));
    missing_ = ranges::advance(current_, n_, end_);
}
else if (x < 0)
{
    ranges::advance(current_, n_ * x + missing_);
    missing_ = 0;
}
return *this;

如果 x 为正，那么调用前表达式 ranges::distance(current_, end_) > n_ * (x - 1) 必须为 true（即，非正式地说，所请求的块应位于底层序列的“内部”）。如果 x 为负，则条件恒成立。

6) 等价于 return *this += -x;。

参数

x

-

相对于当前位置的偏移量

返回值

1,3,5,6) *this

2,4) *this 被修改前的副本

参阅

operator+operator- (C++23)

执行迭代器算术 (函数)