std::swap(std::basic_string)

template< class CharT, class Traits, class Alloc >
void swap( std::basic_string<CharT, Traits, Alloc>& lhs,
           std::basic_string<CharT, Traits, Alloc>& rhs );

template< class CharT, class Traits, class Alloc >
void swap( std::basic_string<CharT, Traits, Alloc>& lhs,
           std::basic_string<CharT, Traits, Alloc>& rhs ) noexcept(/* see below */);

特化 std::swap 算法用于 std::basic_string。交换 lhs 与 rhs 的内容。

等价于 lhs.swap(rhs)。

参数

返回值

(无)

复杂度

常量。

示例

#include <iostream>
#include <string>
int main()
{
    std::string a = "AAA";
    std::string b = "BBBB";
    std::cout << "Before swap:\n"
                 "a = " << a << "\n"
                 "b = " << b << "\n\n";
    std::swap(a, b);
    std::cout << "After swap:\n"
                 "a = " << a << "\n"
                 "b = " << b << '\n';
}

Before swap:
a = AAA
b = BBBB
After swap:
a = BBBB
b = AAA

缺陷报告

以下行为变更缺陷报告被追溯应用于先前发布的C++标准。

参见