iter_swap(std::move_iterator)

 

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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	迭代器定製點 ranges::iter_move (C++20) ranges::iter_swap (C++20)
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std::move_iterator

成員函式

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-=

非成員函式

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

 

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

交換兩個底層迭代器所指向的物件。

等價於 ranges::iter_swap(x.base(), y.base());。

此函式模板對普通的非限定或限定查詢不可見，僅當std::move_iterator<Iter>是實參的關聯類時，才能透過實參依賴查詢找到它。

引數

x, y

-

要交換元素的移動迭代器

複雜度

常數時間。

異常

noexcept 規範：  

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

示例

執行此程式碼

#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); // ADL
 
    std::cout << *x << ' ' << *y << '\n';
}

輸出

AA ⱯⱯ
ⱯⱯ AA

參閱

swap	交換兩個物件的值 (函式模板)
swap_ranges	交換兩個範圍的元素 (函式模板)
iter_swap	交換兩個迭代器所指向的元素 (函式模板)
iter_swap (C++20)	交換兩個可解引用物件所引用的值 (定製點物件)
iter_swap (C++20)	交換兩個調整後的底層迭代器指向的物件 (函式模板)