friendbool operator==(const linear_congruential_engine& lhs,
const linear_congruential_engine& rhs); | (1) | (since C++11) |
friendbool operator!=(const linear_congruential_engine& lhs,
const linear_congruential_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 ofoperator().
These functions are not visible to ordinaryunqualified orqualified lookup, and can only be found byargument-dependent lookup whenstd::linear_congruential_engine<UIntType, a, c, m> is an associated class of the arguments.
The!= operator issynthesized fromoperator==. | (since C++20) |
[edit]Parameters
| lhs, rhs | - | engines to compare |
[edit]Return value
1)true if the engines are equal,false otherwise.
2)true if the engines are not equal,false otherwise.
[edit]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 |
