operator==,!=(std::subtract_with_carry_engine)
From cppreference.com
                    
                                        
                    < cpp | numeric | random | subtract with carry engine
                    
                                                            
                    
| template< class UIntType, size_t w, size_t s, size_t r > bool operator==( const subtract_with_carry_engine<UIntType,w,s,r>& lhs, | (1) | (since C++11) | 
| template< class UIntType, size_t w, size_t s, size_t r > bool operator==( const subtract_with_carry_engine<UIntType,w,s,r>& lhs, | (2) | (since C++11) | 
Compares two pseudo-random number engines. Two engines are equal, if their internal states are equivalent, that is, if they would generate equivalent values for any number of calls of operator().
[edit] Parameters
| lhs, rhs | - | engines to compare | 
[edit] Return value
1) true if the engines are equivalent, false otherwise.
2) true if the engines are not equivalent, false otherwise.
[edit] Exceptions
(none)