1 // Copyright David Abrahams 2004. 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 UNWRAP_WRAPPER_DWA2004723_HPP
5 # define UNWRAP_WRAPPER_DWA2004723_HPP
6 
7 # include <boost/python/detail/prefix.hpp>
8 # include <boost/python/detail/is_wrapper.hpp>
9 # include <boost/mpl/eval_if.hpp>
10 # include <boost/mpl/identity.hpp>
11 
12 namespace boost { namespace python { namespace detail {
13 
14 template <class T>
15 struct unwrap_wrapper_helper
16 {
17     typedef typename T::_wrapper_wrapped_type_ type;
18 };
19 
20 template <class T>
21 struct unwrap_wrapper_
22   : mpl::eval_if<is_wrapper<T>,unwrap_wrapper_helper<T>,mpl::identity<T> >
23 {};
24 
25 template <class T>
26 typename unwrap_wrapper_<T>::type*
unwrap_wrapper(T *)27 unwrap_wrapper(T*)
28 {
29     return 0;
30 }
31 
32 }}} // namespace boost::python::detail
33 
34 #endif // UNWRAP_WRAPPER_DWA2004723_HPP
35