// Copyright David Abrahams 2004. Distributed under the Boost

// Software License, Version 1.0. (See accompanying

// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

#ifndef ENABLE_IF_DWA2004722_HPP

# define ENABLE_IF_DWA2004722_HPP

# include <boost/python/detail/sfinae.hpp>

# include <boost/detail/workaround.hpp>

# if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)

# include <boost/mpl/if.hpp>

namespace boost { namespace python { namespace detail {

template <class T> struct always_void { typedef void type; };

template <class C, class T = int>

struct enable_if_arg

{

typedef typename mpl::if_<C,T,int&>::type type;

};

template <class C, class T = int>

struct disable_if_arg

{

typedef typename mpl::if_<C,int&,T>::type type;

};

template <class C, class T = typename always_void<C>::type>

struct enable_if_ret

{

typedef typename mpl::if_<C,T,int[2]>::type type;

};

template <class C, class T = typename always_void<C>::type>

struct disable_if_ret

{

typedef typename mpl::if_<C,int[2],T>::type type;

};

}}} // namespace boost::python::detail

# elif !defined(BOOST_NO_SFINAE)

# include <boost/utility/enable_if.hpp>

namespace boost { namespace python { namespace detail {

template <class C, class T = int>

struct enable_if_arg

: enable_if<C,T>

{};

template <class C, class T = int>

struct disable_if_arg

: disable_if<C,T>

{};

template <class C, class T = void>

struct enable_if_ret

: enable_if<C,T>

{};

template <class C, class T = void>

struct disable_if_ret

: disable_if<C,T>

{};

}}} // namespace boost::python::detail

# endif

#endif // ENABLE_IF_DWA2004722_HPP