xref: /llvm-project/libcxx/test/std/containers/sequences/vector.bool/empty.pass.cpp (revision 98d3d5b5da66e3cf7807c23a0294280bb796466b)

//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//

// <vector>

// class vector

// bool empty() const noexcept;

#include <vector>
#include <cassert>

#include "test_macros.h"
#include "min_allocator.h"

TEST_CONSTEXPR_CXX20 bool tests()
{
    {
    typedef std::vector<bool> C;
    C c;
    ASSERT_NOEXCEPT(c.empty());
    assert(c.empty());
    c.push_back(false);
    assert(!c.empty());
    c.clear();
    assert(c.empty());
    }
#if TEST_STD_VER >= 11
    {
    typedef std::vector<bool, min_allocator<bool>> C;
    C c;
    ASSERT_NOEXCEPT(c.empty());
    assert(c.empty());
    c.push_back(false);
    assert(!c.empty());
    c.clear();
    assert(c.empty());
    }
#endif

    return true;
}

int main(int, char**)
{
    tests();
#if TEST_STD_VER > 17
    static_assert(tests());
#endif
    return 0;
}