std::counted_iterator<I>::operator=

 

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迭代器概念
间接可读 (C++20) 间接可写 (C++20) 弱可增量 (C++20) 可增量 (C++20) is-integer-like is-signed-integer-like (C++20)(C++20)	sentinel_for (C++20) sized_sentinel_for (C++20) 输入迭代器 (C++20) 输出迭代器 (C++20) 输入或输出迭代器 (C++20)	前向迭代器 (C++20) 双向迭代器 (C++20) 随机访问迭代器 (C++20) 连续迭代器 (C++20)
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input_iterator_tagoutput_iterator_tagforward_iterator_tagbidirectional_iterator_tagrandom_access_iterator_tagcontiguous_iterator_tag (C++20)	iter_value_titer_difference_titer_reference_titer_const_reference_titer_rvalue_reference_titer_common_reference_t (C++20)(C++20)(C++20)(C++23)(C++20)(C++20)	迭代器 (在 C++17 中已弃用) iterator_traits incrementable_traits (C++20) indirectly_readable_traits (C++20)
算法概念和实用程序
间接可调用概念
indirectly_unary_invocableindirectly_regular_unary_invocable (C++20)(C++20)	间接一元谓词 (C++20) 间接二元谓词 (C++20)	间接等价关系 (C++20) 间接严格弱排序 (C++20)
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indirect_result_t (C++20)	projected (C++20)	projected_value_t (C++26)
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reverse_iterator make_reverse_iterator (C++14) move_iterator (C++11) make_move_iterator (C++11) default_sentinel_tdefault_sentinel (C++20)(C++20) unreachable_sentinel_tunreachable_sentinel (C++20)(C++20)	front_insert_iterator back_insert_iterator inserter insert_iterator front_inserter back_inserter move_sentinel (C++20)	common_iterator (C++20) counted_iterator (C++20) basic_const_iterator (C++23) const_iterator (C++23) const_sentinel (C++23) make_const_iterator (C++23) make_const_sentinel (C++23)
流迭代器 istream_iterator    ostream_iterator istreambuf_iterator ostreambuf_iterator	迭代器定制点 ranges::iter_move (C++20) ranges::iter_swap (C++20)
迭代器操作 advance distance prev (C++11)   next (C++11) ranges::advance (C++20) ranges::distance (C++20) ranges::prev (C++20) ranges::next (C++20)	范围访问 begincbegin (C++11)(C++14) rbegincrbegin (C++14)(C++14)   endcend (C++11)(C++14) rendcrend (C++14)(C++14)   sizessize (C++17)(C++20) empty (C++17) data (C++17)

 

std::counted_iterator

成员函数

counted_iterator::counted_iterator

counted_iterator::operator=

counted_iterator::base

counted_iterator::count

counted_iterator::operator*counted_iterator::operator->

counted_iterator::operator[]

counted_iterator::operator++counted_iterator::operator++(int)counted_iterator::operator+counted_iterator::operator+=counted_iterator::operator--counted_iterator::operator--(int)counted_iterator::operator-counted_iterator::operator-=

非成员函数

operator==operator<=> (C++20)(C++20)

operator==(default_sentinel_t) (C++20)

operator+ (C++20)

operator- (C++20)

operator-(default_sentinel_t) (C++20)

iter_move (C++20)

iter_swap (C++20)

辅助类

iterator_traits<std::counted_iterator> (C++20)

 

template< class I2 >     requires std::assignable_from<I&, const I2&> constexpr counted_iterator& operator=( const counted_iterator<I2>& other );		(自 C++20 起)

基础迭代器和长度被分配为other的那些。

参数

other

-

要从中分配的迭代器适配器

返回值

*this

示例

运行此代码

#include <algorithm>
#include <cassert>
#include <initializer_list>
#include <iterator>
 
int main()
{
    auto a = {3, 1, 4, 1, 5, 9, 2};
    std::counted_iterator<std::initializer_list<int>::iterator> p(begin(a), size(a) - 2);
    std::counted_iterator<std::initializer_list<int>::iterator> q;
    assert(q.count() == 0);
    assert(q.count() != p.count());
    q = p;
    assert(q.count() == p.count());
    assert(std::ranges::equal(p, std::default_sentinel, q, std::default_sentinel));
}

另请参阅

(构造函数) (C++20)

构造一个新的迭代器适配器 (公共成员函数)