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1 | // Copyright 2017 Peter Dimov |
2 | // | |
3 | // Distributed under the Boost Software License, Version 1.0. | |
4 | // | |
5 | // http://www.boost.org/LICENSE_1_0.txt | |
6 | ||
7 | #include <boost/config.hpp> | |
8 | ||
9 | #if defined(BOOST_NO_CXX11_DELETED_FUNCTIONS) | |
10 | ||
11 | int main() | |
12 | { | |
13 | } | |
14 | ||
15 | #else | |
16 | ||
17 | #include <boost/optional.hpp> | |
18 | #include <utility> | |
19 | ||
20 | class basic_multi_buffer; | |
21 | ||
22 | class const_buffers_type | |
23 | { | |
24 | basic_multi_buffer const* b_; | |
25 | ||
26 | friend class basic_multi_buffer; | |
27 | ||
28 | explicit | |
29 | const_buffers_type(basic_multi_buffer const& b); | |
30 | ||
31 | public: | |
32 | ||
33 | const_buffers_type() = delete; | |
34 | const_buffers_type(const_buffers_type const&) = default; | |
35 | const_buffers_type& operator=(const_buffers_type const&) = default; | |
36 | }; | |
37 | ||
38 | int main() | |
39 | { | |
40 | boost::optional< std::pair<const_buffers_type, int> > opt, opt2; | |
41 | opt = opt2; | |
42 | } | |
43 | ||
44 | #endif |