llvm/libcxx/test/std/containers/sequences/vector/vector.cons/default_noexcept.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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03

// <vector>

// vector()
//        noexcept(is_nothrow_default_constructible<allocator_type>::value);

// This *was* a conforming extension, but it was adopted in N4258.


#include <vector>
#include <cassert>

#include "test_macros.h"
#include "MoveOnly.h"
#include "test_allocator.h"

template <class T>
struct some_alloc
{
    typedef T value_type;
    some_alloc(const some_alloc&);
    void allocate(std::size_t);
};

TEST_CONSTEXPR_CXX20 bool tests() {
    {
        typedef std::vector<MoveOnly> C;
        static_assert(std::is_nothrow_default_constructible<C>::value, "");
    }
    {
        typedef std::vector<MoveOnly, test_allocator<MoveOnly>> C;
        static_assert(std::is_nothrow_default_constructible<C>::value, "");
    }
    {
        typedef std::vector<MoveOnly, other_allocator<MoveOnly>> C;
        static_assert(!std::is_nothrow_default_constructible<C>::value, "");
    }
    {
        typedef std::vector<MoveOnly, some_alloc<MoveOnly>> C;
        static_assert(!std::is_nothrow_default_constructible<C>::value, "");
    }

    return true;
}

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