test/std/numerics/rand/rand.dis/rand.dist.pois/rand.dist.pois.poisson/io.pass.cpp

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

// <random>

// template<class IntType = int>
// class poisson_distribution

// template <class CharT, class Traits, class IntType>
// basic_ostream<CharT, Traits>&
// operator<<(basic_ostream<CharT, Traits>& os,
//            const poisson_distribution<RealType>& x);

// template <class CharT, class Traits, class IntType>
// basic_istream<CharT, Traits>&
// operator>>(basic_istream<CharT, Traits>& is,
//            poisson_distribution<RealType>& x);

#include <random>
#include <sstream>
#include <cassert>

int main()
{
    {
        typedef std::poisson_distribution<> D;
        D d1(7);
        std::ostringstream os;
        os << d1;
        std::istringstream is(os.str());
        D d2;
        is >> d2;
        assert(d1 == d2);
    }
}