python/detail/enable_if.hpp

0001 // Copyright David Abrahams 2004. Distributed under the Boost
0002 // Software License, Version 1.0. (See accompanying
0003 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0004 #ifndef ENABLE_IF_DWA2004722_HPP
0005 # define ENABLE_IF_DWA2004722_HPP
0006
0007 # include <boost/python/detail/sfinae.hpp>
0008 # include <boost/detail/workaround.hpp>
0009
0010 #if !defined(BOOST_NO_SFINAE)
0011 #  include <boost/utility/enable_if.hpp>
0012
0013 namespace boost { namespace python { namespace detail {
0014
0015 template <class C, class T = int>
0016 struct enable_if_arg
0017   : enable_if<C,T>
0018 {};
0019
0020 template <class C, class T = int>
0021 struct disable_if_arg
0022   : disable_if<C,T>
0023 {};
0024
0025 template <class C, class T = void>
0026 struct enable_if_ret
0027   : enable_if<C,T>
0028 {};
0029
0030 template <class C, class T = void>
0031 struct disable_if_ret
0032   : disable_if<C,T>
0033 {};
0034
0035 }}} // namespace boost::python::detail
0036
0037 # endif
0038
0039 #endif // ENABLE_IF_DWA2004722_HPP