xref: /llvm-project/libcxx/test/std/numerics/rand/rand.eng/rand.eng.mers/copy.pass.cpp (revision 7fc6a55688c816f5fc1a5481ae7af25be7500356)

//===----------------------------------------------------------------------===//
//
// 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 UIntType, size_t w, size_t n, size_t m, size_t r,
//           UIntType a, size_t u, UIntType d, size_t s,
//           UIntType b, size_t t, UIntType c, size_t l, UIntType f>
// class mersenne_twister_engine;

// mersenne_twister_engine(const mersenne_twister_engine&);

#include <random>
#include <cassert>

#include "test_macros.h"

void
test1()
{
    typedef std::mt19937 E;
    E e1;
    (void)e1();
    E e2 = e1;
    assert(e1 == e2);
    assert(e1() == e2());
    E::result_type k = e1();
    assert(e1 != e2);
    assert(e2() == k);
    assert(e1 == e2);
}

void
test2()
{
    typedef std::mt19937_64 E;
    E e1;
    (void)e1();
    E e2(e1);
    assert(e1 == e2);
    assert(e1() == e2());
    E::result_type k = e1();
    assert(e1 != e2);
    assert(e2() == k);
    assert(e1 == e2);
}

int main(int, char**)
{
    test1();
    test2();

  return 0;
}