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std::poisson_distribution<IntType>::poisson_distribution

poisson_distribution() : poisson_distribution(1.0) {}
 (1) (since C++11) 
explicit poisson_distribution( double mean );
 (2) (since C++11) 
explicit poisson_distribution( const param_type& params );
 (3) (since C++11)

Constructs a new distribution object.

1) Uses 1.0 as the distribution parameter.
2) Uses mean as the distribution parameter.
3) Uses params as the distribution parameter.

Parameters

mean - the μ distribution parameter (the mean of the distribution)
params - the distribution parameter set

Notes

Requires that 0 < mean.

Defect reports

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

DR Applied to Behavior as published Correct behavior
P0935R0 C++11 default constructor was explicit made implicit

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