test/std/numerics/rand/rand.eng/rand.eng.lcong/assign.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 UIntType, UIntType a, UIntType c, UIntType m>
//   class linear_congruential_engine;

// linear_congruential_engine& operator=(const linear_congruential_engine&);

#include <random>
#include <cassert>

#include "test_macros.h"

template <class T, T a, T c, T m>
void
test1()
{
    typedef std::linear_congruential_engine<T, a, c, m> E;
    E e1;
    E e2;
    assert(e1 == e2);
    (void)e1();
    e2 = e1;
    assert(e1 == e2);
}

template <class T>
void
test()
{
    test1<T, 0, 0, 0>();
    test1<T, 0, 1, 2>();
    test1<T, 1, 1, 2>();
    const T M(static_cast<T>(-1));
    test1<T, 0, 0, M>();
    test1<T, 0, M-2, M>();
    test1<T, 0, M-1, M>();
    test1<T, M-2, 0, M>();
    test1<T, M-2, M-2, M>();
    test1<T, M-2, M-1, M>();
    test1<T, M-1, 0, M>();
    test1<T, M-1, M-2, M>();
    test1<T, M-1, M-1, M>();
}

int main(int, char**)
{
    test<unsigned short>();
    test<unsigned int>();
    test<unsigned long>();
    test<unsigned long long>();

  return 0;
}