std::basic_regex::operator=
From cppreference.com
                    
                                        
                    < cpp | regex | basic regex
                    
                                                            
                    |   Defined in header <regex>
   | 
||
|   basic_regex& operator=( const basic_regex& other );  | 
(1) | (since C++11) | 
|   basic_regex& operator=( basic_regex&& other );  | 
(2) | (since C++11) | 
|   basic_regex& operator=( const CharT* ptr );  | 
(3) | (since C++11) | 
|   basic_regex& operator=( std::initializer_list<CharT> il );  | 
(4) | (since C++11) | 
|   template< class ST, class SA > basic_regex& operator=( const std::basic_string<CharT,ST,SA>& p );  | 
(5) | (since C++11) | 
Assigns the contents.
1) Copy assignment operator. Assigns the contents of other. Equivalent to assign(other);.
2) Move assignment operator. Assigns the contents of other using move semantics. other is in valid, but unspecified state after the operation. Equivalent to assign(other);.
3) Assigns a null-terminated character string pointed to by ptr. Equivalent to assign(ptr);.
4) Assigns characters contained in initializer list il. Equivalent to assign(il);.
5) Assigns the contents of the string p. Equivalent to assign(p);.
Contents | 
[edit] Parameters
| other | - | another regex object | 
| ptr | - | pointer to a null-terminated character string | 
| il | - | initializer list containing characters to assign | 
| p | - | string containing characters to assign | 
[edit] Return value
*this.
[edit] Exceptions
1) (none)
2) 
3-5) (none)
[edit] See also
|    assigns the contents  (public member function)  | |