source: NonGTP/Boost/boost/utility/result_of.hpp @ 857

Revision 857, 1.7 KB checked in by igarcia, 19 years ago (diff)
Line 
1// Boost result_of library
2
3//  Copyright Douglas Gregor 2004. Use, modification and
4//  distribution is subject to the Boost Software License, Version
5//  1.0. (See accompanying file LICENSE_1_0.txt or copy at
6//  http://www.boost.org/LICENSE_1_0.txt)
7
8// For more information, see http://www.boost.org/libs/utility
9#ifndef BOOST_RESULT_OF_HPP
10#define BOOST_RESULT_OF_HPP
11
12#include <boost/config.hpp>
13#include <boost/type_traits/ice.hpp>
14#include <boost/type.hpp>
15#include <boost/preprocessor.hpp>
16#include <boost/detail/workaround.hpp>
17#include <boost/mpl/has_xxx.hpp>
18
19#ifndef BOOST_RESULT_OF_NUM_ARGS
20#  define BOOST_RESULT_OF_NUM_ARGS 10
21#endif
22
23namespace boost {
24
25template<typename F> struct result_of;
26
27#if !defined(BOOST_NO_SFINAE) && !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
28namespace detail {
29
30BOOST_MPL_HAS_XXX_TRAIT_DEF(result_type)
31
32template<typename F, typename FArgs, bool HasResultType> struct get_result_of;
33
34template<typename F, typename FArgs>
35struct get_result_of<F, FArgs, true>
36{
37  typedef typename F::result_type type;
38};
39
40template<typename F, typename FArgs>
41struct get_result_of<F, FArgs, false>
42{
43  typedef typename F::template result<FArgs>::type type;
44};
45
46template<typename F>
47struct get_result_of<F, F(void), false>
48{
49  typedef void type;
50};
51
52template<typename F, typename FArgs>
53struct result_of : get_result_of<F, FArgs, (has_result_type<F>::value)> {};
54
55} // end namespace detail
56
57#define BOOST_PP_ITERATION_PARAMS_1 (3,(0,BOOST_RESULT_OF_NUM_ARGS,<boost/utility/detail/result_of_iterate.hpp>))
58#include BOOST_PP_ITERATE()
59
60#else
61#  define BOOST_NO_RESULT_OF 1
62#endif
63
64}
65
66#endif // BOOST_RESULT_OF_HPP
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