std:: swap (std::basic_string)

Specializes the std::swap algorithm for std::basic_string . Swaps the contents of lhs and rhs .

Equivalent to lhs. swap ( rhs ) .

Parameters

Return value

(none)

Complexity

Constant.

Example

#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

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

See also