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1 | // Copyright David Abrahams 2006. 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_PARENTHESIZED_TYPE_DWA2006414_HPP | |
5 | # define BOOST_PARAMETER_AUX_PARENTHESIZED_TYPE_DWA2006414_HPP | |
6 | ||
7 | # include <boost/config.hpp> | |
8 | # include <boost/detail/workaround.hpp> | |
9 | ||
10 | namespace boost { namespace parameter { namespace aux { | |
11 | ||
12 | // A macro that takes a parenthesized C++ type name (T) and transforms | |
13 | // it into an un-parenthesized type expression equivalent to T. | |
14 | # define BOOST_PARAMETER_PARENTHESIZED_TYPE(x) \ | |
15 | boost::parameter::aux::unaryfunptr_arg_type< void(*)x >::type | |
16 | ||
17 | // A metafunction that transforms void(*)(T) -> T | |
18 | template <class UnaryFunctionPointer> | |
19 | struct unaryfunptr_arg_type; | |
20 | ||
21 | template <class Arg> | |
22 | struct unaryfunptr_arg_type<void(*)(Arg)> | |
23 | { | |
24 | typedef Arg type; | |
25 | }; | |
26 | ||
27 | template <> | |
28 | struct unaryfunptr_arg_type<void(*)(void)> | |
29 | { | |
30 | typedef void type; | |
31 | }; | |
32 | ||
33 | }}} // namespace boost::parameter::aux | |
34 | ||
35 | #endif // BOOST_PARAMETER_AUX_PARENTHESIZED_TYPE_DWA2006414_HPP |