operator==,!= (std::mersenne_twister_engine)

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std::mersenne_twister_engine
friend bool operator == ( const mersenne_twister_engine & lhs,
const mersenne_twister_engine & rhs ) ;
(1) (since C++11)
friend bool operator ! = ( const mersenne_twister_engine & lhs,
const mersenne_twister_engine & rhs ) ;
(2) (since C++11)
(until C++20)

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 ( ) .

These functions are not visible to ordinary unqualified or qualified lookup , and can only be found by argument-dependent lookup when std:: mersenne_twister_engine < UIntType, w, n, m, r, a, u, d, s, b, t, c, l, f > is an associated class of the arguments.

The != operator is synthesized from operator== .

(since C++20)

Parameters

lhs, rhs - engines to compare

Return value

1) true if the engines are equal, false otherwise.
2) true if the engines are not equal, false otherwise.

Defect reports

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

DR Applied to Behavior as published Correct behavior
LWG 3519 C++11 the form of equality operators were unspecified specified to be hidden friends
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