//===----------------------------------------------------------------------===//
//
// 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, c++11

// <experimental/iterator>
//
// template <class _Delim, class _CharT = char, class _Traits = char_traits<_CharT>>
//   class ostream_joiner;
//
//   ostream_joiner & operator*() noexcept
//     returns *this;

#include <experimental/iterator>
#include <iostream>
#include <cassert>

#include "test_macros.h"

namespace exp = std::experimental;

template <class Delim, class CharT, class Traits>
void test ( exp::ostream_joiner<Delim, CharT, Traits> &oj ) {
    static_assert((noexcept(*oj)), "" );
    exp::ostream_joiner<Delim, CharT, Traits> &ret = *oj;
    assert( &ret == &oj );
    }

int main(int, char**) {

    { exp::ostream_joiner<char>         oj(std::cout, '8');                 test(oj); }
    { exp::ostream_joiner<std::string>  oj(std::cout, std::string("9"));    test(oj); }
    { exp::ostream_joiner<std::wstring> oj(std::cout, std::wstring(L"10")); test(oj); }
    { exp::ostream_joiner<int>          oj(std::cout, 11);                  test(oj); }

    { exp::ostream_joiner<char, wchar_t>         oj(std::wcout, '8');                 test(oj); }
    { exp::ostream_joiner<std::string, wchar_t>  oj(std::wcout, std::string("9"));    test(oj); }
    { exp::ostream_joiner<std::wstring, wchar_t> oj(std::wcout, std::wstring(L"10")); test(oj); }
    { exp::ostream_joiner<int, wchar_t>          oj(std::wcout, 11);                  test(oj); }
    
  return 0;
}