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

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C random library
 
std::mersenne_twister_engine
Member functions
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Characteristics
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Non-member functions
operator==operator!=
(哋它亢++11)(哋它亢++11)(until 哋它亢++20)
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friend bool operator==( const mersenne_twister_engine& lhs,
                        const mersenne_twister_engine& rhs );
 (1) (since 哋它亢++11)
friend bool operator!=( const mersenne_twister_engine& lhs,
                        const mersenne_twister_engine& rhs );
 (2) (since 哋它亢++11)
(until 哋它亢++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 哋它亢++20)

Parameters

lhs, rhs - engines to compare

Return value

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

Exceptions

Throws nothing.

Defect reports

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

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