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1 | // Copyright David Abrahams 2005. Distributed under the Boost | |
2 | // Software License, Version 1.0. (See accompanying | |
3 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
4 | #ifndef BOOST_PARAMETER_AUX_RESULT_OF0_DWA2005511_HPP | |
5 | # define BOOST_PARAMETER_AUX_RESULT_OF0_DWA2005511_HPP | |
6 | ||
7 | # include <boost/utility/result_of.hpp> | |
8 | ||
9 | // A metafunction returning the result of invoking a nullary function | |
10 | // object of the given type. | |
11 | ||
12 | #ifndef BOOST_NO_RESULT_OF | |
13 | ||
14 | # include <boost/utility/result_of.hpp> | |
15 | namespace boost { namespace parameter { namespace aux { | |
16 | template <class F> | |
17 | struct result_of0 : result_of<F()> | |
18 | {}; | |
19 | ||
20 | }}} // namespace boost::parameter::aux_ | |
21 | ||
22 | #else | |
23 | ||
24 | namespace boost { namespace parameter { namespace aux { | |
25 | template <class F> | |
26 | struct result_of0 | |
27 | { | |
28 | typedef typename F::result_type type; | |
29 | }; | |
30 | ||
31 | }}} // namespace boost::parameter::aux_ | |
32 | ||
33 | #endif | |
34 | ||
35 | ||
36 | #endif // BOOST_PARAMETER_AUX_RESULT_OF0_DWA2005511_HPP |