//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: no-threads

// <thread>

// class thread::id

// bool operator==(thread::id x, thread::id y);
// bool operator!=(thread::id x, thread::id y);

#include <thread>
#include <cassert>

#include "test_macros.h"

int main(int, char**)
{
    std::thread::id id0;
    std::thread::id id1;
    id1 = id0;
    assert( (id1 == id0));
    assert(!(id1 != id0));
    id1 = std::this_thread::get_id();
    assert(!(id1 == id0));
    assert( (id1 != id0));

    // Regression tests for https://github.com/llvm/llvm-project/issues/56187
    // libc++ previously declared the comparison operators as hidden friends
    // which was non-conforming.
    assert(!std::operator==(id1, id0));
    assert(std::operator!=(id1, id0));

    return 0;
}