1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
5 * https://github.com/exclipy/inline_variant_visitor/blob/master/function_signature.hpp
6 * which apparently copied it from
7 * http://stackoverflow.com/questions/4771417/how-to-get-the-signature-of-a-c-bind-expression
10 #ifndef FUNCTION_SIGNATURE_H
11 #define FUNCTION_SIGNATURE_H
13 #include <boost/mpl/pop_front.hpp>
14 #include <boost/mpl/push_front.hpp>
15 #include <boost/function_types/function_type.hpp>
16 #include <boost/function_types/result_type.hpp>
17 #include <boost/function_types/parameter_types.hpp>
20 struct signature_of_member
22 typedef typename
boost::function_types::result_type
<F
>::type result_type
;
23 typedef typename
boost::function_types::parameter_types
<F
>::type parameter_types
;
24 typedef typename
boost::mpl::pop_front
<parameter_types
>::type base
;
25 typedef typename
boost::mpl::push_front
<base
, result_type
>::type L
;
26 typedef typename
boost::function_types::function_type
<L
>::type type
;
29 template <typename F
, bool is_class
>
30 struct signature_of_impl
32 typedef typename
boost::function_types::function_type
<F
>::type type
;
36 struct signature_of_impl
<F
, true>
38 typedef typename signature_of_member
<decltype(&F::operator())>::type type
;
44 typedef typename signature_of_impl
<F
, boost::is_class
<F
>::value
>::type type
;