llvm-project/libcxx/test/std/strings/basic.string/string.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

// <string>

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

// This tests a conforming extension

#include <string>
#include <cassert>

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

int main(int, char**)
{
    {
        typedef std::string C;
        static_assert(std::is_nothrow_default_constructible<C>::value, "");
    }
    {
        typedef std::basic_string<char, std::char_traits<char>, test_allocator<char>> C;
        static_assert(std::is_nothrow_default_constructible<C>::value, "");
    }
    {
        typedef std::basic_string<char, std::char_traits<char>, limited_allocator<char, 10>> C;
        static_assert(!std::is_nothrow_default_constructible<C>::value, "");
    }

  return 0;
}