1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
// Copyright (C) 2015, Andrzej Krzemienski.
//
// Use, modification, and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// See http://www.boost.org/lib/optional for documentation.
//
// You are welcome to contact the author at:
// akrzemi1@gmail.com
#include <iostream>
#include "boost/optional.hpp"
// but no boost/optional/optional_io.hpp
// THIS TEST SHOULD FAIL TO COMPILE
// Unless one includes header boost/optional/optional_io.hpp, it should not be possible
// to stream out an optional object.
void test_streaming_out_optional()
{
boost::optional<int> opt;
std::cout << opt;
}
|
