Performs stream input and output operations on pseudo-random number distribution d.
Traitstemplate parameters, otherwise the behavior is undefined. If bad input is encountered, ist.setstate(std::ios::failbit) is called, which may throw std::ios_base::failure. d is unchanged in that case.
These function templates are not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when
std::poisson_distribution<ResultType> is an associated class of the arguments.
|ost||-||output stream to insert the data to|
|ist||-||input stream to extract the data from|
|d||-||pseudo-random number distribution|
 Return value
 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 insertion and extraction operators were unspecified
(could be hidden friends or out-of-class function templates)
|specified to be hidden friends|