1 | // |
2 | // arg_copy_test.cpp - copying a custom placeholder _1 to arg<1> |
3 | // |
4 | // Copyright 2016 Peter Dimov |
5 | // |
6 | // Distributed under the Boost Software License, Version 1.0. |
7 | // See accompanying file LICENSE_1_0.txt or copy at |
8 | // http://www.boost.org/LICENSE_1_0.txt |
9 | // |
10 | |
11 | #include <boost/is_placeholder.hpp> |
12 | #include <boost/bind/arg.hpp> |
13 | |
14 | // |
15 | |
16 | template<int I> struct ph |
17 | { |
18 | }; |
19 | |
20 | namespace boost |
21 | { |
22 | |
23 | template<int I> struct is_placeholder< ::ph<I> > |
24 | { |
25 | enum _vt { value = I }; |
26 | }; |
27 | |
28 | } // namespace boost |
29 | |
30 | int main() |
31 | { |
32 | boost::arg<1> a1 = ph<1>(); |
33 | (void)a1; |
34 | } |
35 | |