FM / transform

/usr/include/boost/proto/transform

Name	Size	Mode	Actions
detail/	-	0755	rm
arg.hpp	9900	0644	edit dl rm
call.hpp	16228	0644	edit dl rm
default.hpp	28465	0644	edit dl rm
env.hpp	19842	0644	edit dl rm
fold.hpp	8565	0644	edit dl rm
fold_tree.hpp	6494	0644	edit dl rm
impl.hpp	21669	0644	edit dl rm
integral_c.hpp	2500	0644	edit dl rm
lazy.hpp	2045	0644	edit dl rm
make.hpp	9691	0644	edit dl rm
pass_through.hpp	5067	0644	edit dl rm
when.hpp	9903	0644	edit dl rm

Edit: /usr/include/boost/proto/transform/call.hpp (16228B)

///////////////////////////////////////////////////////////////////////////////
/// \file call.hpp
/// Contains definition of the call<> transform.
//
//  Copyright 2008 Eric Niebler. 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 BOOST_PROTO_TRANSFORM_CALL_HPP_EAN_11_02_2007
#define BOOST_PROTO_TRANSFORM_CALL_HPP_EAN_11_02_2007

#if defined(_MSC_VER)
# pragma warning(push)
# pragma warning(disable: 4714) // function 'xxx' marked as __forceinline not inlined
#endif

#include <boost/preprocessor/cat.hpp>
#include <boost/preprocessor/facilities/intercept.hpp>
#include <boost/preprocessor/iteration/iterate.hpp>
#include <boost/preprocessor/repetition/enum.hpp>
#include <boost/preprocessor/repetition/repeat.hpp>
#include <boost/preprocessor/repetition/enum_params.hpp>
#include <boost/preprocessor/repetition/enum_binary_params.hpp>
#include <boost/preprocessor/repetition/enum_trailing_params.hpp>
#include <boost/ref.hpp>
#include <boost/utility/result_of.hpp>
#include <boost/proto/proto_fwd.hpp>
#include <boost/proto/traits.hpp>
#include <boost/proto/transform/impl.hpp>
#include <boost/proto/detail/as_lvalue.hpp>
#include <boost/proto/detail/poly_function.hpp>
#include <boost/proto/transform/detail/pack.hpp>

namespace boost { namespace proto
{
    /// \brief Wrap \c PrimitiveTransform so that <tt>when\<\></tt> knows
    /// it is callable. Requires that the parameter is actually a
    /// PrimitiveTransform.
    ///
    /// This form of <tt>call\<\></tt> is useful for annotating an
    /// arbitrary PrimitiveTransform as callable when using it with
    /// <tt>when\<\></tt>. Consider the following transform, which
    /// is parameterized with another transform.
    ///
    /// \code
    /// template<typename Grammar>
    /// struct Foo
    ///   : when<
    ///         unary_plus<Grammar>
    ///       , Grammar(_child)   // May or may not work.
    ///     >
    /// {};
    /// \endcode
    ///
    /// The problem with the above is that <tt>when\<\></tt> may or
    /// may not recognize \c Grammar as callable, depending on how
    /// \c Grammar is implemented. (See <tt>is_callable\<\></tt> for
    /// a discussion of this issue.) You can guard against
    /// the issue by wrapping \c Grammar in <tt>call\<\></tt>, such
    /// as:
    ///
    /// \code
    /// template<typename Grammar>
    /// struct Foo
    ///   : when<
    ///         unary_plus<Grammar>
    ///       , call<Grammar>(_child)   // OK, this works
    ///     >
    /// {};
    /// \endcode
    ///
    /// The above could also have been written as:
    ///
    /// \code
    /// template<typename Grammar>
    /// struct Foo
    ///   : when<
    ///         unary_plus<Grammar>
    ///       , call<Grammar(_child)>   // OK, this works, too
    ///     >
    /// {};
    /// \endcode
    template<typename PrimitiveTransform>
    struct call
      : PrimitiveTransform
    {};

/// \brief A specialization that treats function pointer Transforms as
    /// if they were function type Transforms.
    ///
    /// This specialization requires that \c Fun is actually a function type.
    ///
    /// This specialization is required for nested transforms such as
    /// <tt>call\<T0(T1(_))\></tt>. In C++, functions that are used as
    /// parameters to other functions automatically decay to funtion
    /// pointer types. In other words, the type <tt>T0(T1(_))</tt> is
    /// indistinguishable from <tt>T0(T1(*)(_))</tt>. This specialization
    /// is required to handle these nested function pointer type transforms
    /// properly.
    template<typename Fun>
    struct call<Fun *>
      : call<Fun>
    {};

/// INTERNAL ONLY
    template<typename Fun>
    struct call<detail::msvc_fun_workaround<Fun> >
      : call<Fun>
    {};

/// \brief Either call the PolymorphicFunctionObject with 0
    /// arguments, or invoke the PrimitiveTransform with 3
    /// arguments.
    template<typename Fun>
    struct call<Fun()> : transform<call<Fun()> >
    {
        /// INTERNAL ONLY
        template<typename Expr, typename State, typename Data, bool B>
        struct impl2
          : transform_impl<Expr, State, Data>
        {
            typedef typename BOOST_PROTO_RESULT_OF<Fun()>::type result_type;

BOOST_FORCEINLINE
            result_type operator()(
                typename impl2::expr_param
              , typename impl2::state_param
              , typename impl2::data_param
            ) const
            {
                return Fun()();
            }
        };

/// INTERNAL ONLY
        template<typename Expr, typename State, typename Data>
        struct impl2<Expr, State, Data, true>
          : Fun::template impl<Expr, State, Data>
        {};

/// Either call the PolymorphicFunctionObject \c Fun with 0 arguments; or
        /// invoke the PrimitiveTransform \c Fun with 3 arguments: the current
        /// expression, state, and data.
        ///
        /// If \c Fun is a nullary PolymorphicFunctionObject, return <tt>Fun()()</tt>.
        /// Otherwise, return <tt>Fun()(e, s, d)</tt>.
        ///
        /// \param e The current expression
        /// \param s The current state
        /// \param d An arbitrary data

/// If \c Fun is a nullary PolymorphicFunctionObject, \c type is a typedef
        /// for <tt>boost::result_of\<Fun()\>::type</tt>. Otherwise, it is
        /// a typedef for <tt>boost::result_of\<Fun(Expr, State, Data)\>::type</tt>.
        template<typename Expr, typename State, typename Data>
        struct impl
          : impl2<Expr, State, Data, detail::is_transform_<Fun>::value>
        {};
    };

/// \brief Either call the PolymorphicFunctionObject with 1
    /// argument, or invoke the PrimitiveTransform with 3
    /// arguments.
    template<typename Fun, typename A0>
    struct call<Fun(A0)> : transform<call<Fun(A0)> >
    {
        template<typename Expr, typename State, typename Data, bool B>
        struct impl2
          : transform_impl<Expr, State, Data>
        {
            typedef typename when<_, A0>::template impl<Expr, State, Data>::result_type a0;
            typedef typename detail::poly_function_traits<Fun, Fun(a0)>::result_type result_type;
            
            BOOST_FORCEINLINE
            result_type operator ()(
                typename impl2::expr_param   e
              , typename impl2::state_param  s
              , typename impl2::data_param   d
            ) const
            {
                return typename detail::poly_function_traits<Fun, Fun(a0)>::function_type()(
                    detail::as_lvalue(typename when<_, A0>::template impl<Expr, State, Data>()(e, s, d))
                );
            }
        };

template<typename Expr, typename State, typename Data>
        struct impl2<Expr, State, Data, true>
          : transform_impl<Expr, State, Data>
        {
            typedef typename when<_, A0>::template impl<Expr, State, Data>::result_type a0;
            typedef typename Fun::template impl<a0, State, Data>::result_type result_type;
            
            BOOST_FORCEINLINE
            result_type operator ()(
                typename impl2::expr_param   e
              , typename impl2::state_param  s
              , typename impl2::data_param   d
            ) const
            {
                return typename Fun::template impl<a0, State, Data>()(
                    typename when<_, A0>::template impl<Expr, State, Data>()(e, s, d)
                  , s
                  , d
                );
            }
        };
        /// Let \c x be <tt>when\<_, A0\>()(e, s, d)</tt> and \c X
        /// be the type of \c x.
        /// If \c Fun is a unary PolymorphicFunctionObject that accepts \c x,
        /// then \c type is a typedef for <tt>boost::result_of\<Fun(X)\>::type</tt>.
        /// Otherwise, it is a typedef for <tt>boost::result_of\<Fun(X, State, Data)\>::type</tt>.

/// Either call the PolymorphicFunctionObject with 1 argument:
        /// the result of applying the \c A0 transform; or
        /// invoke the PrimitiveTransform with 3 arguments:
        /// result of applying the \c A0 transform, the state, and the
        /// data.
        ///
        /// Let \c x be <tt>when\<_, A0\>()(e, s, d)</tt>.
        /// If \c Fun is a unary PolymorphicFunctionObject that accepts \c x,
        /// then return <tt>Fun()(x)</tt>. Otherwise, return
        /// <tt>Fun()(x, s, d)</tt>.
        ///
        /// \param e The current expression
        /// \param s The current state
        /// \param d An arbitrary data
        template<typename Expr, typename State, typename Data>
        struct impl
          : impl2<Expr, State, Data, detail::is_transform_<Fun>::value>
        {};
    };

/// \brief Either call the PolymorphicFunctionObject with 2
    /// arguments, or invoke the PrimitiveTransform with 3
    /// arguments.
    template<typename Fun, typename A0, typename A1>
    struct call<Fun(A0, A1)> : transform<call<Fun(A0, A1)> >
    {
        template<typename Expr, typename State, typename Data, bool B>
        struct impl2
          : transform_impl<Expr, State, Data>
        {
            typedef typename when<_, A0>::template impl<Expr, State, Data>::result_type a0;
            typedef typename when<_, A1>::template impl<Expr, State, Data>::result_type a1;
            typedef typename detail::poly_function_traits<Fun, Fun(a0, a1)>::result_type result_type;
            
            BOOST_FORCEINLINE
            result_type operator ()(
                typename impl2::expr_param   e
              , typename impl2::state_param  s
              , typename impl2::data_param   d
            ) const
            {
                return typename detail::poly_function_traits<Fun, Fun(a0, a1)>::function_type()(
                    detail::as_lvalue(typename when<_, A0>::template impl<Expr, State, Data>()(e, s, d))
                  , detail::as_lvalue(typename when<_, A1>::template impl<Expr, State, Data>()(e, s, d))
                );
            }
        };

template<typename Expr, typename State, typename Data>
        struct impl2<Expr, State, Data, true>
          : transform_impl<Expr, State, Data>
        {
            typedef typename when<_, A0>::template impl<Expr, State, Data>::result_type a0;
            typedef typename when<_, A1>::template impl<Expr, State, Data>::result_type a1;
            typedef typename Fun::template impl<a0, a1, Data>::result_type result_type;
            
            BOOST_FORCEINLINE
            result_type operator ()(
                typename impl2::expr_param   e
              , typename impl2::state_param  s
              , typename impl2::data_param   d
            ) const
            {
                return typename Fun::template impl<a0, a1, Data>()(
                    typename when<_, A0>::template impl<Expr, State, Data>()(e, s, d)
                  , typename when<_, A1>::template impl<Expr, State, Data>()(e, s, d)
                  , d
                );
            }
        };

/// Let \c x be <tt>when\<_, A0\>()(e, s, d)</tt> and \c X
            /// be the type of \c x.
            /// Let \c y be <tt>when\<_, A1\>()(e, s, d)</tt> and \c Y
            /// be the type of \c y.
            /// If \c Fun is a binary PolymorphicFunction object that accepts \c x
            /// and \c y, then \c type is a typedef for
            /// <tt>boost::result_of\<Fun(X, Y)\>::type</tt>. Otherwise, it is
            /// a typedef for <tt>boost::result_of\<Fun(X, Y, Data)\>::type</tt>.

/// Either call the PolymorphicFunctionObject with 2 arguments:
        /// the result of applying the \c A0 transform, and the
        /// result of applying the \c A1 transform; or invoke the
        /// PrimitiveTransform with 3 arguments: the result of applying
        /// the \c A0 transform, the result of applying the \c A1
        /// transform, and the data.
        ///
        /// Let \c x be <tt>when\<_, A0\>()(e, s, d)</tt>.
        /// Let \c y be <tt>when\<_, A1\>()(e, s, d)</tt>.
        /// If \c Fun is a binary PolymorphicFunction object that accepts \c x
        /// and \c y, return <tt>Fun()(x, y)</tt>. Otherwise, return
        /// <tt>Fun()(x, y, d)</tt>.
        ///
        /// \param e The current expression
        /// \param s The current state
        /// \param d An arbitrary data
        template<typename Expr, typename State, typename Data>
        struct impl
          : impl2<Expr, State, Data, detail::is_transform_<Fun>::value>
        {};
    };

/// \brief Call the PolymorphicFunctionObject or the
    /// PrimitiveTransform with the current expression, state
    /// and data, transformed according to \c A0, \c A1, and
    /// \c A2, respectively.
    template<typename Fun, typename A0, typename A1, typename A2>
    struct call<Fun(A0, A1, A2)> : transform<call<Fun(A0, A1, A2)> >
    {
        template<typename Expr, typename State, typename Data, bool B>
        struct impl2
          : transform_impl<Expr, State, Data>
        {
            typedef typename when<_, A0>::template impl<Expr, State, Data>::result_type a0;
            typedef typename when<_, A1>::template impl<Expr, State, Data>::result_type a1;
            typedef typename when<_, A2>::template impl<Expr, State, Data>::result_type a2;
            typedef typename detail::poly_function_traits<Fun, Fun(a0, a1, a2)>::result_type result_type;
            
            BOOST_FORCEINLINE
            result_type operator ()(
                typename impl2::expr_param   e
              , typename impl2::state_param  s
              , typename impl2::data_param   d
            ) const
            {
                return typename detail::poly_function_traits<Fun, Fun(a0, a1, a2)>::function_type()(
                    detail::as_lvalue(typename when<_, A0>::template impl<Expr, State, Data>()(e, s, d))
                  , detail::as_lvalue(typename when<_, A1>::template impl<Expr, State, Data>()(e, s, d))
                  , detail::as_lvalue(typename when<_, A2>::template impl<Expr, State, Data>()(e, s, d))
                );
            }
        };

template<typename Expr, typename State, typename Data>
        struct impl2<Expr, State, Data, true>
          : transform_impl<Expr, State, Data>
        {
            typedef typename when<_, A0>::template impl<Expr, State, Data>::result_type a0;
            typedef typename when<_, A1>::template impl<Expr, State, Data>::result_type a1;
            typedef typename when<_, A2>::template impl<Expr, State, Data>::result_type a2;
            typedef typename Fun::template impl<a0, a1, a2>::result_type result_type;
            
            BOOST_FORCEINLINE
            result_type operator ()(
                typename impl2::expr_param   e
              , typename impl2::state_param  s
              , typename impl2::data_param   d
            ) const
            {
                return typename Fun::template impl<a0, a1, a2>()(
                    typename when<_, A0>::template impl<Expr, State, Data>()(e, s, d)
                  , typename when<_, A1>::template impl<Expr, State, Data>()(e, s, d)
                  , typename when<_, A2>::template impl<Expr, State, Data>()(e, s, d)
                );
            }
        };

/// Let \c x be <tt>when\<_, A0\>()(e, s, d)</tt>.
        /// Let \c y be <tt>when\<_, A1\>()(e, s, d)</tt>.
        /// Let \c z be <tt>when\<_, A2\>()(e, s, d)</tt>.
        /// Return <tt>Fun()(x, y, z)</tt>.
        ///
        /// \param e The current expression
        /// \param s The current state
        /// \param d An arbitrary data

template<typename Expr, typename State, typename Data>
        struct impl
          : impl2<Expr, State, Data, detail::is_transform_<Fun>::value>
        {};
    };

#include <boost/proto/transform/detail/call.hpp>

/// INTERNAL ONLY
    ///
    template<typename Fun>
    struct is_callable<call<Fun> >
      : mpl::true_
    {};

}} // namespace boost::proto

#if defined(_MSC_VER)
# pragma warning(pop)
#endif

#endif

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