libcxx/test/std/utilities/template.bitset/bitset.operators/op_and.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
//
//===----------------------------------------------------------------------===//

// test bitset<N> operator&(const bitset<N>& lhs, const bitset<N>& rhs);

#include <bitset>
#include <cstdlib>
#include <cassert>

#include "test_macros.h"

#if defined(TEST_COMPILER_CLANG)
#pragma clang diagnostic ignored "-Wtautological-compare"
#elif defined(TEST_COMPILER_C1XX)
#pragma warning(disable: 6294) // Ill-defined for-loop:  initial condition does not satisfy test.  Loop body not executed.
#endif

template <std::size_t N>
std::bitset<N>
make_bitset()
{
    std::bitset<N> v;
    for (std::size_t i = 0; i < N; ++i)
        v[i] = static_cast<bool>(std::rand() & 1);
    return v;
}

template <std::size_t N>
void test_op_and()
{
    std::bitset<N> v1 = make_bitset<N>();
    std::bitset<N> v2 = make_bitset<N>();
    std::bitset<N> v3 = v1;
    assert((v1 & v2) == (v3 &= v2));
}

int main(int, char**)
{
    test_op_and<0>();
    test_op_and<1>();
    test_op_and<31>();
    test_op_and<32>();
    test_op_and<33>();
    test_op_and<63>();
    test_op_and<64>();
    test_op_and<65>();
    test_op_and<1000>();

  return 0;
}