iter_swap(std::move_iterator)

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indirectly_unary_invocableindirectly_regular_unary_invocable (C++20)(C++20)	indirect_unary_predicate (C++20) indirect_binary_predicate (C++20)	indirect_equivalence_relation (C++20) indirect_strict_weak_order (C++20)
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indirectly_movable (C++20) indirectly_movable_storable (C++20) indirectly_copyable (C++20)	indirectly_copyable_storable (C++20)   indirectly_swappable (C++20) indirectly_comparable (C++20)	permutable (C++20) mergeable (C++20) sortable (C++20)
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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)
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std::move_iterator

成员函数

move_iterator::move_iterator

move_iterator::operator=

move_iterator::base

move_iterator::operator*move_iterator::operator->

move_iterator::operator[]

move_iterator::operator++move_iterator::operator+move_iterator::operator+=move_iterator::operator--move_iterator::operator-move_iterator::operator-=

非成员函数

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

operator==(move_sentinel) (C++20)

operator+

operator-

operator-(move_sentinel) (C++20)

iter_move (C++20)

iter_swap (C++20)

make_move_iterator (C++11)

 

<tbody> </tbody>

template< std::indirectly_swappable<Iter> Iter2 > friend constexpr void iter_swap( const move_iterator& x, const std::move_iterator<Iter2>& y ) noexcept(/* 见下文 */);		(C++20 起)

交换两个底层迭代器所指向的对象。

等价于 ranges::iter_swap(x.base(), y.base());。

此函数模板对常规的无限定或有限定查找不可见，而只能在 std::move_iterator<Iter> 为实参的关联类时由实参依赖查找找到。

参数

x, y

-

指向要交换元素的移动迭代器

复杂度

常数。

异常

noexcept 说明：  

noexcept(noexcept(ranges::iter_swap(x.base(), y.base())))

示例

运行此代码

#include <iostream>
#include <iterator>
#include <string>
#include <vector>

int main()
{
    std::vector<std::string> p{"AA", "EE"},
                             q{"ⱯⱯ", "ƎƎ"};
    
    std::move_iterator<std::vector<std::string>::iterator>
        x = std::make_move_iterator(p.begin()),
        y = std::make_move_iterator(q.begin());
    
    std::cout << *x << ' ' << *y << '\n';
    
    iter_swap(x, y); // 实参依赖查找
    
    std::cout << *x << ' ' << *y << '\n';
}

输出：

AA ⱯⱯ
ⱯⱯ AA

参阅

swap	交换两个对象的值 (函数模板)
swap_ranges	交换两个范围的元素 (函数模板)
iter_swap	交换两个迭代器所指向的元素 (函数模板)
iter_swap (C++20)	交换两个可解引用对象所引用的值 (定制点对象)
iter_swap (C++20)	交换两个调整后的底层迭代器所指向的对象 (函数模板)