llvm/libcxx/test/std/experimental/iterator/ostream.joiner/ostream.joiner.ops/ostream_joiner.op.star.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, c++11
// UNSUPPORTED: no-localization

// <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 exper = std::experimental;

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

int main(int, char**) {

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

#ifndef TEST_HAS_NO_WIDE_CHARACTERS
    { exper::ostream_joiner<char, wchar_t>         oj(std::wcout, '8');                 test(oj); }
    { exper::ostream_joiner<std::string, wchar_t>  oj(std::wcout, std::string("9"));    test(oj); }
    { exper::ostream_joiner<std::wstring, wchar_t> oj(std::wcout, std::wstring(L"10")); test(oj); }
    { exper::ostream_joiner<int, wchar_t>          oj(std::wcout, 11);                  test(oj); }
#endif

  return 0;
}