Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: /// \file integral_c.hpp
Chris@16: /// Contains definition of the integral_c transform and friends.
Chris@16: //
Chris@16: //  Copyright 2011 Eric Niebler. Distributed under the Boost
Chris@16: //  Software License, Version 1.0. (See accompanying file
Chris@16: //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: #ifndef BOOST_PROTO_TRANSFORM_INTEGRAL_C_HPP_EAN_04_28_2011
Chris@16: #define BOOST_PROTO_TRANSFORM_INTEGRAL_C_HPP_EAN_04_28_2011
Chris@16: 
Chris@16: #include <boost/proto/proto_fwd.hpp>
Chris@16: #include <boost/proto/transform/impl.hpp>
Chris@16: 
Chris@16: namespace boost { namespace proto
Chris@16: {
Chris@16: 
Chris@16:     /// \brief A PrimitiveTransform that returns a specified
Chris@16:     /// integral constant
Chris@16:     ///
Chris@16:     template<typename T, T I>
Chris@16:     struct integral_c : transform<integral_c<T, I> >
Chris@16:     {
Chris@16:         template<typename Expr, typename State, typename Data>
Chris@16:         struct impl : transform_impl<Expr, State, Data>
Chris@16:         {
Chris@16:             typedef T result_type;
Chris@16: 
Chris@16:             /// \return \c I
Chris@16:             /// \throw nothrow
Chris@16:             T operator()(
Chris@16:                 typename impl::expr_param
Chris@16:               , typename impl::state_param
Chris@16:               , typename impl::data_param
Chris@16:             ) const
Chris@16:             {
Chris@16:                 return I;
Chris@16:             }
Chris@16:         };
Chris@16:     };
Chris@16: 
Chris@16:     /// \brief A PrimitiveTransform that returns a specified
Chris@16:     /// char
Chris@16:     ///
Chris@16:     template<char I>
Chris@16:     struct char_
Chris@16:       : integral_c<char, I>
Chris@16:     {};
Chris@16: 
Chris@16:     /// \brief A PrimitiveTransform that returns a specified
Chris@16:     /// int
Chris@16:     ///
Chris@16:     template<int I>
Chris@16:     struct int_
Chris@16:       : integral_c<int, I>
Chris@16:     {};
Chris@16: 
Chris@16:     /// \brief A PrimitiveTransform that returns a specified
Chris@16:     /// long
Chris@16:     ///
Chris@16:     template<long I>
Chris@16:     struct long_
Chris@16:       : integral_c<long, I>
Chris@16:     {};
Chris@16: 
Chris@16:     /// \brief A PrimitiveTransform that returns a specified
Chris@16:     /// std::size_t
Chris@16:     ///
Chris@16:     template<std::size_t I>
Chris@16:     struct size_t
Chris@16:       : integral_c<std::size_t, I>
Chris@16:     {};
Chris@16: 
Chris@16:     /// INTERNAL ONLY
Chris@16:     ///
Chris@16:     template<typename T, T I>
Chris@16:     struct is_callable<integral_c<T, I> >
Chris@16:       : mpl::true_
Chris@16:     {};
Chris@16: 
Chris@16:     /// INTERNAL ONLY
Chris@16:     ///
Chris@16:     template<char I>
Chris@16:     struct is_callable<char_<I> >
Chris@16:       : mpl::true_
Chris@16:     {};
Chris@16: 
Chris@16:     /// INTERNAL ONLY
Chris@16:     ///
Chris@16:     template<int I>
Chris@16:     struct is_callable<int_<I> >
Chris@16:       : mpl::true_
Chris@16:     {};
Chris@16: 
Chris@16:     /// INTERNAL ONLY
Chris@16:     ///
Chris@16:     template<long I>
Chris@16:     struct is_callable<long_<I> >
Chris@16:       : mpl::true_
Chris@16:     {};
Chris@16: 
Chris@16:     /// INTERNAL ONLY
Chris@16:     ///
Chris@16:     template<std::size_t I>
Chris@16:     struct is_callable<size_t<I> >
Chris@16:       : mpl::true_
Chris@16:     {};
Chris@16: 
Chris@16: }}
Chris@16: 
Chris@16: #endif