libcxx/test/std/strings/basic.string/string.cons/dtor_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++98, c++03

// <string>

// ~basic_string() // implied noexcept;

#include <string>
#include <cassert>

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

template <class T>
struct throwing_alloc
{
    typedef T value_type;
    throwing_alloc(const throwing_alloc&);
    T *allocate(size_t);
    ~throwing_alloc() noexcept(false);
};

// Test that it's possible to take the address of basic_string's destructors
// by creating globals which will register their destructors with cxa_atexit.
std::string s;
std::wstring ws;

int main(int, char**)
{
    {
        typedef std::string C;
        static_assert(std::is_nothrow_destructible<C>::value, "");
    }
    {
        typedef std::basic_string<char, std::char_traits<char>, test_allocator<char>> C;
        static_assert(std::is_nothrow_destructible<C>::value, "");
    }
#if defined(_LIBCPP_VERSION)
    {
        typedef std::basic_string<char, std::char_traits<char>, throwing_alloc<char>> C;
        static_assert(!std::is_nothrow_destructible<C>::value, "");
    }
#endif // _LIBCPP_VERSION

  return 0;
}