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

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C++
Numerics library
Pseudo-random number generation
Random number distributions
Uniform distributions
(C++11)
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Bernoulli distributions
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Poisson distributions
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Normal distributions
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Sampling distributions
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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>

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
2) true if the engines are not equal, false

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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