1#if !defined(BOOST_PROTO_DONT_USE_PREPROCESSED_FILES)
2
3 #include <boost/proto/transform/detail/preprocessed/call.hpp>
4
5#elif !defined(BOOST_PP_IS_ITERATING)
6
7 #define BOOST_PROTO_NTH_RESULT_TYPE(Z, M, DATA) \
8 typedef \
9 typename when<_, BOOST_PP_CAT(A, M)>::template impl<Expr, State, Data> \
10 BOOST_PP_CAT(a, M); \
11 typedef typename BOOST_PP_CAT(a, M)::result_type BOOST_PP_CAT(b, M); \
12 /**/
13
14 #define BOOST_PROTO_NTH_RESULT(Z, M, DATA) \
15 detail::as_lvalue(BOOST_PP_CAT(a, M)()(e, s, d)) \
16 /**/
17
18 #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
19 #pragma wave option(preserve: 2, line: 0, output: "preprocessed/call.hpp")
20 #endif
21
22 ///////////////////////////////////////////////////////////////////////////////
23 /// \file call.hpp
24 /// Contains definition of the call<> transform.
25 //
26 // Copyright 2008 Eric Niebler. Distributed under the Boost
27 // Software License, Version 1.0. (See accompanying file
28 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
29
30 #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
31 #pragma wave option(preserve: 1)
32 #endif
33
34 #define BOOST_PP_ITERATION_PARAMS_1 \
35 (3, (1, BOOST_PROTO_MAX_ARITY, <boost/proto/transform/detail/call.hpp>))
36 #include BOOST_PP_ITERATE()
37
38 #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
39 #pragma wave option(output: null)
40 #endif
41
42 #undef BOOST_PROTO_NTH_RESULT
43 #undef BOOST_PROTO_NTH_RESULT_TYPE
44
45#else
46
47 #define N BOOST_PP_ITERATION()
48
49 #if N > 3
50 /// \brief Call the PolymorphicFunctionObject \c Fun with the
51 /// current expression, state and data, transformed according
52 /// to \c A0 through \c AN.
53 template<typename Fun BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
54 struct call<Fun(BOOST_PP_ENUM_PARAMS(N, A))> : transform<call<Fun(BOOST_PP_ENUM_PARAMS(N, A))> >
55 {
56 template<typename Expr, typename State, typename Data>
57 struct impl : transform_impl<Expr, State, Data>
58 {
59 BOOST_PP_REPEAT(N, BOOST_PROTO_NTH_RESULT_TYPE, ~)
60
61 typedef detail::poly_function_traits<Fun, Fun(BOOST_PP_ENUM_PARAMS(N, b))> function_traits;
62 typedef typename function_traits::result_type result_type;
63
64 /// Let \c ax be <tt>when\<_, Ax\>()(e, s, d)</tt>
65 /// for each \c x in <tt>[0,N]</tt>.
66 /// Return <tt>Fun()(a0, a1,... aN)</tt>.
67 ///
68 /// \param e The current expression
69 /// \param s The current state
70 /// \param d An arbitrary data
71 BOOST_FORCEINLINE
72 result_type operator ()(
73 typename impl::expr_param e
74 , typename impl::state_param s
75 , typename impl::data_param d
76 ) const
77 {
78 typedef typename function_traits::function_type function_type;
79 return function_type()(BOOST_PP_ENUM(N, BOOST_PROTO_NTH_RESULT, ~));
80 }
81 };
82 };
83 #endif
84
85 #if N > 0
86 /// \brief Call the PolymorphicFunctionObject \c Fun with the
87 /// current expression, state and data, transformed according
88 /// to \c A0 through \c AN.
89 template<typename Fun BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
90 struct call<Fun(BOOST_PP_ENUM_PARAMS(N, A)...)> : transform<call<Fun(BOOST_PP_ENUM_PARAMS(N, A)...)> >
91 {
92 template<typename Expr, typename State, typename Data>
93 struct impl
94 : call<
95 typename detail::expand_pattern<
96 proto::arity_of<Expr>::value // BUGBUG this isn't right. Could be pack(_child), should use arity of child!
97 , BOOST_PP_CAT(A, BOOST_PP_DEC(N))
98 , detail::BOOST_PP_CAT(expand_pattern_rest_, BOOST_PP_DEC(N))<
99 Fun
100 BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_DEC(N), A)
101 >
102 >::type
103 >::template impl<Expr, State, Data>
104 {};
105 };
106 #endif
107
108 #undef N
109
110#endif
111