命名空间
变体
操作

std::inplace_vector<T,N>::swap

来自 cppreference.com
< cpp‎ | 容器‎ | 就地向量
 
 
 
 
constexpr void swap( inplace_vector& other ) noexcept(/* see below */);
(自 C++26)

将容器的内容与 other 的内容交换。不会导致迭代器和引用与另一个容器相关联。

内容

[编辑] 参数

other - 要交换内容的容器

[编辑] 返回值

(无)

[编辑] 异常

noexcept 规范:  
noexcept(N == 0 ||
         (std::is_nothrow_swappable_v<T> && std::is_nothrow_move_constructible_v<T>))

[编辑] 复杂度

容器大小的线性。

[编辑] 示例

#include <inplace_vector>
#include <print>
 
int main()
{
    std::inplace_vector<int, 3> a1{1, 2, 3}, a2{4, 5, 6};
 
    auto i1 = a1.begin();
    auto i2 = a2.begin();
    int& r1 = a1[1];
    int& r2 = a2[1];
 
    auto print_them_all = [&](auto rem)
    {
        std::println("{}a1 = {}, a2 = {}, *i1 = {}, *i2 = {}, r1 = {}, r2 = {}",
                     rem, a1, a2, *i1, *i2, r1, r2);
    };
 
    print_them_all("Before swap:\n");
    a1.swap(a2);
    print_them_all("After swap:\n");
 
    // Note that after swap() iterators and references stay associated with their
    // original sites, e.g., i1 points to element a1[0], r1 refers to a1[1].
}

输出

Before swap:
a1 = [1, 2, 3], a2 = [4, 5, 6], *i1 = 1, *i2 = 4, r1 = 2, r2 = 5
After swap:
a1 = [4, 5, 6], a2 = [1, 2, 3], *i1 = 4, *i2 = 1, r1 = 5, r2 = 2

[编辑] 另请参阅

专门化了 std::swap 算法
(函数模板) [编辑]