std::swap(std::basic_string)
From cppreference.com
                    
                                        
                    < cpp | string | basic string
                    
                                                            
                    |   template< class CharT, class Traits, class Alloc > void swap( basic_string<CharT, Traits, Alloc> &lhs, basic_string<CharT, Traits, Alloc> &rhs );  | 
||
Specializes the std::swap algorithm for std::basic_string. Swaps the contents of lhs and rhs. Equivalent to lhs.swap(rhs).
Contents | 
[edit] Parameters
| lhs, rhs | - | strings whose contents to swap | 
[edit] Return value
(none)
[edit] Complexity
Constant.
[edit] Exceptions
| 
 noexcept specification:  
 
noexcept(noexcept(lhs.swap(rhs)))  | 
(since C++17) | 
[edit] See also
|    swaps the contents   (public member function)  |