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libcxx_old/test/std/numerics/rand/rand.eng/rand.eng.mers/discard.pass.cpp

59 lines
1.2 KiB
C++

//===----------------------------------------------------------------------===//
//
// 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;
// void discard(unsigned long long z);
#include <random>
#include <sstream>
#include <cassert>
#include "test_macros.h"
void
test1()
{
std::mt19937 e1;
std::mt19937 e2 = e1;
assert(e1 == e2);
e1.discard(3);
assert(e1 != e2);
(void)e2();
(void)e2();
(void)e2();
assert(e1 == e2);
}
void
test2()
{
std::mt19937_64 e1;
std::mt19937_64 e2 = e1;
assert(e1 == e2);
e1.discard(3);
assert(e1 != e2);
(void)e2();
(void)e2();
(void)e2();
assert(e1 == e2);
}
int main(int, char**)
{
test1();
test2();
return 0;
}