source: NonGTP/Boost/boost/spirit/phoenix/composite.hpp @ 857

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[857]1/*=============================================================================
2    Phoenix V1.2.1
3    Copyright (c) 2001-2002 Joel de Guzman
4
5    Use, modification and distribution is subject to the Boost Software
6    License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
7    http://www.boost.org/LICENSE_1_0.txt)
8==============================================================================*/
9#ifndef PHOENIX_COMPOSITE_HPP
10#define PHOENIX_COMPOSITE_HPP
11
12///////////////////////////////////////////////////////////////////////////////
13#include <boost/spirit/phoenix/actor.hpp>
14
15///////////////////////////////////////////////////////////////////////////////
16namespace phoenix {
17
18///////////////////////////////////////////////////////////////////////////////
19//
20//  composite class
21//
22//      A composite is an actor base class composed of zero or more
23//      actors (see actor.hpp) and an operation. A composite is itself
24//      an actor superclass and conforms to its conceptual interface.
25//      Its eval member function un-funnels the tupled actual arguments
26//      from the tuple by invoking each of the actors' eval member
27//      function. The results of each are then passed on as arguments to
28//      the operation. Specializations are provided to handle different
29//      numbers of actors.
30//
31//      Schematically:
32//
33//          actor0.eval(tupled_args) --> arg0 --> |
34//          actor1.eval(tupled_args) --> arg1 --> |
35//          actor2.eval(tupled_args) --> arg3 --> | --> operation(arg0...argN)
36//            ...                                 |
37//          actorN.eval(tupled_args) --> argN --> |
38//
39//      The operation can be any suitable functor that can accept the
40//      arguments passed in by the composite. The operation is expected
41//      to have a member operator() that carries out the actual
42//      operation. There should be a one to one correspondence between
43//      actors of the composite and the arguments of the operation's
44//      member operator().
45//
46//      The operation is also expected to have a nested template class
47//      result<T0...TN>. The nested template class result should have a
48//      typedef 'type' that reflects the return type of its member
49//      operator(). This is essentially a type computer that answers the
50//      metaprogramming question "Given arguments of type T0...TN, what
51//      will be its operator()'s return type?".
52//
53//      There is a special case for operations that accept no arguments.
54//      Such nullary operations are only required to define a typedef
55//      result_type that reflects the return type of its operator().
56//
57//      Here's an example of a simple operation that squares a number:
58//
59//          struct square {
60//
61//              template <typename ArgT>
62//              struct result { typedef ArgT type; };
63//
64//              template <typename ArgT>
65//              ArgT operator()(ArgT n) const { return n * n; }
66//          };
67//
68//      As can be seen, operations can be polymorphic. Its arguments and
69//      return type are not fixed to a particular type. The example
70//      above for example, can handle any ArgT type as long as it has a
71//      multiplication operator.
72//
73//      Composites are not created directly. Instead, there are meta-
74//      programs provided that indirectly create composites. See
75//      operators.hpp, binders.hpp and functions.hpp for examples.
76//
77///////////////////////////////////////////////////////////////////////////////
78template <
79    typename OperationT
80    ,   typename A = nil_t
81    ,   typename B = nil_t
82    ,   typename C = nil_t
83
84#if PHOENIX_LIMIT > 3
85    ,   typename D = nil_t
86    ,   typename E = nil_t
87    ,   typename F = nil_t
88
89#if PHOENIX_LIMIT > 6
90    ,   typename G = nil_t
91    ,   typename H = nil_t
92    ,   typename I = nil_t
93
94#if PHOENIX_LIMIT > 9
95    ,   typename J = nil_t
96    ,   typename K = nil_t
97    ,   typename L = nil_t
98
99#if PHOENIX_LIMIT > 12
100    ,   typename M = nil_t
101    ,   typename N = nil_t
102    ,   typename O = nil_t
103
104#endif
105#endif
106#endif
107#endif
108
109    ,   typename NU = nil_t  // Not used
110>
111struct composite;
112
113///////////////////////////////////////////////////////////////////////////////
114//
115//  composite <0 actor> class
116//
117///////////////////////////////////////////////////////////////////////////////
118template <typename OperationT, typename TupleT>
119struct composite0_result {
120
121    typedef typename OperationT::result_type type;
122};
123
124//////////////////////////////////
125template <typename OperationT>
126struct composite<OperationT,
127    nil_t, nil_t, nil_t,
128#if PHOENIX_LIMIT > 3
129    nil_t, nil_t, nil_t,
130#if PHOENIX_LIMIT > 6
131    nil_t, nil_t, nil_t,
132#if PHOENIX_LIMIT > 9
133    nil_t, nil_t, nil_t,
134#if PHOENIX_LIMIT > 12
135    nil_t, nil_t, nil_t,
136#endif
137#endif
138#endif
139#endif
140    nil_t   //  Unused
141> {
142
143    typedef composite<OperationT> self_t;
144
145    template <typename TupleT>
146    struct result {
147
148        typedef typename composite0_result<
149            OperationT, TupleT
150        >::type type;
151    };
152
153    composite(OperationT const& op_)
154    :   op(op_) {}
155
156    template <typename TupleT>
157    typename OperationT::result_type
158    eval(TupleT const& /*args*/) const
159    {
160        return op();
161    }
162
163    mutable OperationT op; //  operation
164};
165
166///////////////////////////////////////////////////////////////////////////////
167//
168//  composite <1 actor> class
169//
170///////////////////////////////////////////////////////////////////////////////
171template <typename OperationT, typename TupleT,
172    typename A>
173struct composite1_result {
174
175    typedef typename OperationT::template result<
176        typename actor_result<A, TupleT>::plain_type
177    >::type type;
178};
179
180//////////////////////////////////
181template <typename OperationT,
182    typename A>
183struct composite<OperationT,
184    A, nil_t, nil_t,
185#if PHOENIX_LIMIT > 3
186    nil_t, nil_t, nil_t,
187#if PHOENIX_LIMIT > 6
188    nil_t, nil_t, nil_t,
189#if PHOENIX_LIMIT > 9
190    nil_t, nil_t, nil_t,
191#if PHOENIX_LIMIT > 12
192    nil_t, nil_t, nil_t,
193#endif
194#endif
195#endif
196#endif
197    nil_t   //  Unused
198> {
199
200    typedef composite<OperationT, A> self_t;
201
202    template <typename TupleT>
203    struct result {
204
205        typedef typename composite1_result<
206            OperationT, TupleT, A
207        >::type type;
208    };
209
210    composite(OperationT const& op_,
211        A const& a_)
212    :   op(op_), a(a_) {}
213
214    template <typename TupleT>
215    typename actor_result<self_t, TupleT>::type
216    eval(TupleT const& args) const
217    {
218        typename actor_result<A, TupleT>::type ra = a.eval(args);
219        return op(ra);
220    }
221
222    mutable OperationT op; //  operation
223    A a; //  actors
224};
225
226///////////////////////////////////////////////////////////////////////////////
227//
228//  composite <2 actors> class
229//
230///////////////////////////////////////////////////////////////////////////////
231template <typename OperationT, typename TupleT,
232    typename A, typename B>
233struct composite2_result {
234
235    typedef typename OperationT::template result<
236        typename actor_result<A, TupleT>::plain_type,
237        typename actor_result<B, TupleT>::plain_type
238    >::type type;
239};
240
241//////////////////////////////////
242template <typename OperationT,
243    typename A, typename B>
244struct composite<OperationT,
245    A, B, nil_t,
246#if PHOENIX_LIMIT > 3
247    nil_t, nil_t, nil_t,
248#if PHOENIX_LIMIT > 6
249    nil_t, nil_t, nil_t,
250#if PHOENIX_LIMIT > 9
251    nil_t, nil_t, nil_t,
252#if PHOENIX_LIMIT > 12
253    nil_t, nil_t, nil_t,
254#endif
255#endif
256#endif
257#endif
258    nil_t   //  Unused
259> {
260
261    typedef composite<OperationT, A, B> self_t;
262
263    template <typename TupleT>
264    struct result {
265
266        typedef typename composite2_result<
267            OperationT, TupleT, A, B
268        >::type type;
269    };
270
271    composite(OperationT const& op_,
272        A const& a_, B const& b_)
273    :   op(op_), a(a_), b(b_) {}
274
275    template <typename TupleT>
276    typename actor_result<self_t, TupleT>::type
277    eval(TupleT const& args) const
278    {
279        typename actor_result<A, TupleT>::type ra = a.eval(args);
280        typename actor_result<B, TupleT>::type rb = b.eval(args);
281        return op(ra, rb);
282    }
283
284    mutable OperationT op; //  operation
285    A a; B b; //  actors
286};
287
288///////////////////////////////////////////////////////////////////////////////
289//
290//  composite <3 actors> class
291//
292///////////////////////////////////////////////////////////////////////////////
293template <typename OperationT, typename TupleT,
294    typename A, typename B, typename C>
295struct composite3_result {
296
297    typedef typename OperationT::template result<
298        typename actor_result<A, TupleT>::plain_type,
299        typename actor_result<B, TupleT>::plain_type,
300        typename actor_result<C, TupleT>::plain_type
301    >::type type;
302};
303
304//////////////////////////////////
305template <typename OperationT,
306    typename A, typename B, typename C>
307struct composite<OperationT,
308    A, B, C,
309#if PHOENIX_LIMIT > 3
310    nil_t, nil_t, nil_t,
311#if PHOENIX_LIMIT > 6
312    nil_t, nil_t, nil_t,
313#if PHOENIX_LIMIT > 9
314    nil_t, nil_t, nil_t,
315#if PHOENIX_LIMIT > 12
316    nil_t, nil_t, nil_t,
317#endif
318#endif
319#endif
320#endif
321    nil_t   //  Unused
322> {
323
324    typedef composite<OperationT, A, B, C> self_t;
325
326    template <typename TupleT>
327    struct result {
328
329        typedef typename composite3_result<
330            OperationT, TupleT, A, B, C
331        >::type type;
332    };
333
334    composite(OperationT const& op_,
335        A const& a_, B const& b_, C const& c_)
336    :   op(op_), a(a_), b(b_), c(c_) {}
337
338    template <typename TupleT>
339    typename actor_result<self_t, TupleT>::type
340    eval(TupleT const& args) const
341    {
342        typename actor_result<A, TupleT>::type ra = a.eval(args);
343        typename actor_result<B, TupleT>::type rb = b.eval(args);
344        typename actor_result<C, TupleT>::type rc = c.eval(args);
345        return op(ra, rb, rc);
346    }
347
348    mutable OperationT op; //  operation
349    A a; B b; C c; //  actors
350};
351
352#if PHOENIX_LIMIT > 3
353///////////////////////////////////////////////////////////////////////////////
354//
355//  composite <4 actors> class
356//
357///////////////////////////////////////////////////////////////////////////////
358template <typename OperationT, typename TupleT,
359    typename A, typename B, typename C, typename D>
360struct composite4_result {
361
362    typedef typename OperationT::template result<
363        typename actor_result<A, TupleT>::plain_type,
364        typename actor_result<B, TupleT>::plain_type,
365        typename actor_result<C, TupleT>::plain_type,
366        typename actor_result<D, TupleT>::plain_type
367    >::type type;
368};
369
370//////////////////////////////////
371template <typename OperationT,
372    typename A, typename B, typename C, typename D>
373struct composite<OperationT,
374    A, B, C, D, nil_t, nil_t,
375#if PHOENIX_LIMIT > 6
376    nil_t, nil_t, nil_t,
377#if PHOENIX_LIMIT > 9
378    nil_t, nil_t, nil_t,
379#if PHOENIX_LIMIT > 12
380    nil_t, nil_t, nil_t,
381#endif
382#endif
383#endif
384    nil_t   //  Unused
385> {
386
387    typedef composite<OperationT, A, B, C, D> self_t;
388
389    template <typename TupleT>
390    struct result {
391
392        typedef typename composite4_result<
393            OperationT, TupleT, A, B, C, D
394        >::type type;
395    };
396
397    composite(OperationT const& op_,
398        A const& a_, B const& b_, C const& c_, D const& d_)
399    :   op(op_), a(a_), b(b_), c(c_), d(d_) {}
400
401    template <typename TupleT>
402    typename actor_result<self_t, TupleT>::type
403    eval(TupleT const& args) const
404    {
405        typename actor_result<A, TupleT>::type ra = a.eval(args);
406        typename actor_result<B, TupleT>::type rb = b.eval(args);
407        typename actor_result<C, TupleT>::type rc = c.eval(args);
408        typename actor_result<D, TupleT>::type rd = d.eval(args);
409        return op(ra, rb, rc, rd);
410    }
411
412    mutable OperationT op; //  operation
413    A a; B b; C c; D d; //  actors
414};
415
416///////////////////////////////////////////////////////////////////////////////
417//
418//  composite <5 actors> class
419//
420///////////////////////////////////////////////////////////////////////////////
421template <typename OperationT, typename TupleT,
422    typename A, typename B, typename C, typename D, typename E>
423struct composite5_result {
424
425    typedef typename OperationT::template result<
426        typename actor_result<A, TupleT>::plain_type,
427        typename actor_result<B, TupleT>::plain_type,
428        typename actor_result<C, TupleT>::plain_type,
429        typename actor_result<D, TupleT>::plain_type,
430        typename actor_result<E, TupleT>::plain_type
431    >::type type;
432};
433
434//////////////////////////////////
435template <typename OperationT,
436    typename A, typename B, typename C, typename D, typename E>
437struct composite<OperationT,
438    A, B, C, D, E, nil_t,
439#if PHOENIX_LIMIT > 6
440    nil_t, nil_t, nil_t,
441#if PHOENIX_LIMIT > 9
442    nil_t, nil_t, nil_t,
443#if PHOENIX_LIMIT > 12
444    nil_t, nil_t, nil_t,
445#endif
446#endif
447#endif
448    nil_t   //  Unused
449> {
450
451    typedef composite<OperationT, A, B, C, D, E> self_t;
452
453    template <typename TupleT>
454    struct result {
455
456        typedef typename composite5_result<
457            OperationT, TupleT, A, B, C, D, E
458        >::type type;
459    };
460
461    composite(OperationT const& op_,
462        A const& a_, B const& b_, C const& c_, D const& d_, E const& e_)
463    :   op(op_), a(a_), b(b_), c(c_), d(d_), e(e_) {}
464
465    template <typename TupleT>
466    typename actor_result<self_t, TupleT>::type
467    eval(TupleT const& args) const
468    {
469        typename actor_result<A, TupleT>::type ra = a.eval(args);
470        typename actor_result<B, TupleT>::type rb = b.eval(args);
471        typename actor_result<C, TupleT>::type rc = c.eval(args);
472        typename actor_result<D, TupleT>::type rd = d.eval(args);
473        typename actor_result<E, TupleT>::type re = e.eval(args);
474        return op(ra, rb, rc, rd, re);
475    }
476
477    mutable OperationT op; //  operation
478    A a; B b; C c; D d; E e; //  actors
479};
480
481///////////////////////////////////////////////////////////////////////////////
482//
483//  composite <6 actors> class
484//
485///////////////////////////////////////////////////////////////////////////////
486template <typename OperationT, typename TupleT,
487    typename A, typename B, typename C, typename D, typename E,
488    typename F>
489struct composite6_result {
490
491    typedef typename OperationT::template result<
492        typename actor_result<A, TupleT>::plain_type,
493        typename actor_result<B, TupleT>::plain_type,
494        typename actor_result<C, TupleT>::plain_type,
495        typename actor_result<D, TupleT>::plain_type,
496        typename actor_result<E, TupleT>::plain_type,
497        typename actor_result<F, TupleT>::plain_type
498    >::type type;
499};
500
501//////////////////////////////////
502template <typename OperationT,
503    typename A, typename B, typename C, typename D, typename E,
504    typename F>
505struct composite<OperationT,
506    A, B, C, D, E, F,
507#if PHOENIX_LIMIT > 6
508    nil_t, nil_t, nil_t,
509#if PHOENIX_LIMIT > 9
510    nil_t, nil_t, nil_t,
511#if PHOENIX_LIMIT > 12
512    nil_t, nil_t, nil_t,
513#endif
514#endif
515#endif
516    nil_t   //  Unused
517> {
518
519    typedef composite<OperationT, A, B, C, D, E, F> self_t;
520
521    template <typename TupleT>
522    struct result {
523
524        typedef typename composite6_result<
525            OperationT, TupleT, A, B, C, D, E, F
526        >::type type;
527    };
528
529    composite(OperationT const& op_,
530        A const& a_, B const& b_, C const& c_, D const& d_, E const& e_,
531        F const& f_)
532    :   op(op_), a(a_), b(b_), c(c_), d(d_), e(e_),
533        f(f_) {}
534
535    template <typename TupleT>
536    typename actor_result<self_t, TupleT>::type
537    eval(TupleT const& args) const
538    {
539        typename actor_result<A, TupleT>::type ra = a.eval(args);
540        typename actor_result<B, TupleT>::type rb = b.eval(args);
541        typename actor_result<C, TupleT>::type rc = c.eval(args);
542        typename actor_result<D, TupleT>::type rd = d.eval(args);
543        typename actor_result<E, TupleT>::type re = e.eval(args);
544        typename actor_result<F, TupleT>::type rf = f.eval(args);
545        return op(ra, rb, rc, rd, re, rf);
546    }
547
548    mutable OperationT op; //  operation
549    A a; B b; C c; D d; E e; F f; //  actors
550};
551
552#if PHOENIX_LIMIT > 6
553///////////////////////////////////////////////////////////////////////////////
554//
555//  composite <7 actors> class
556//
557///////////////////////////////////////////////////////////////////////////////
558template <typename OperationT, typename TupleT,
559    typename A, typename B, typename C, typename D, typename E,
560    typename F, typename G>
561struct composite7_result {
562
563    typedef typename OperationT::template result<
564        typename actor_result<A, TupleT>::plain_type,
565        typename actor_result<B, TupleT>::plain_type,
566        typename actor_result<C, TupleT>::plain_type,
567        typename actor_result<D, TupleT>::plain_type,
568        typename actor_result<E, TupleT>::plain_type,
569        typename actor_result<F, TupleT>::plain_type,
570        typename actor_result<G, TupleT>::plain_type
571    >::type type;
572};
573
574//////////////////////////////////
575template <typename OperationT,
576    typename A, typename B, typename C, typename D, typename E,
577    typename F, typename G>
578struct composite<OperationT,
579    A, B, C, D, E, F, G, nil_t, nil_t,
580#if PHOENIX_LIMIT > 9
581    nil_t, nil_t, nil_t,
582#if PHOENIX_LIMIT > 12
583    nil_t, nil_t, nil_t,
584#endif
585#endif
586    nil_t   //  Unused
587> {
588
589    typedef composite<OperationT, A, B, C, D, E, F, G> self_t;
590
591    template <typename TupleT>
592    struct result {
593
594        typedef typename composite7_result<
595            OperationT, TupleT, A, B, C, D, E, F, G
596        >::type type;
597    };
598
599    composite(OperationT const& op_,
600        A const& a_, B const& b_, C const& c_, D const& d_, E const& e_,
601        F const& f_, G const& g_)
602    :   op(op_), a(a_), b(b_), c(c_), d(d_), e(e_),
603        f(f_), g(g_) {}
604
605    template <typename TupleT>
606    typename actor_result<self_t, TupleT>::type
607    eval(TupleT const& args) const
608    {
609        typename actor_result<A, TupleT>::type ra = a.eval(args);
610        typename actor_result<B, TupleT>::type rb = b.eval(args);
611        typename actor_result<C, TupleT>::type rc = c.eval(args);
612        typename actor_result<D, TupleT>::type rd = d.eval(args);
613        typename actor_result<E, TupleT>::type re = e.eval(args);
614        typename actor_result<F, TupleT>::type rf = f.eval(args);
615        typename actor_result<G, TupleT>::type rg = g.eval(args);
616        return op(ra, rb, rc, rd, re, rf, rg);
617    }
618
619    mutable OperationT op; //  operation
620    A a; B b; C c; D d; E e; F f; G g; //  actors
621};
622
623///////////////////////////////////////////////////////////////////////////////
624//
625//  composite <8 actors> class
626//
627///////////////////////////////////////////////////////////////////////////////
628template <typename OperationT, typename TupleT,
629    typename A, typename B, typename C, typename D, typename E,
630    typename F, typename G, typename H>
631struct composite8_result {
632
633    typedef typename OperationT::template result<
634        typename actor_result<A, TupleT>::plain_type,
635        typename actor_result<B, TupleT>::plain_type,
636        typename actor_result<C, TupleT>::plain_type,
637        typename actor_result<D, TupleT>::plain_type,
638        typename actor_result<E, TupleT>::plain_type,
639        typename actor_result<F, TupleT>::plain_type,
640        typename actor_result<G, TupleT>::plain_type,
641        typename actor_result<H, TupleT>::plain_type
642    >::type type;
643};
644
645//////////////////////////////////
646template <typename OperationT,
647    typename A, typename B, typename C, typename D, typename E,
648    typename F, typename G, typename H>
649struct composite<OperationT,
650    A, B, C, D, E, F, G, H, nil_t,
651#if PHOENIX_LIMIT > 9
652    nil_t, nil_t, nil_t,
653#if PHOENIX_LIMIT > 12
654    nil_t, nil_t, nil_t,
655#endif
656#endif
657    nil_t   //  Unused
658> {
659
660    typedef composite<OperationT, A, B, C, D, E, F, G, H> self_t;
661
662    template <typename TupleT>
663    struct result {
664
665        typedef typename composite8_result<
666            OperationT, TupleT, A, B, C, D, E, F, G, H
667        >::type type;
668    };
669
670    composite(OperationT const& op_,
671        A const& a_, B const& b_, C const& c_, D const& d_, E const& e_,
672        F const& f_, G const& g_, H const& h_)
673    :   op(op_), a(a_), b(b_), c(c_), d(d_), e(e_),
674        f(f_), g(g_), h(h_) {}
675
676    template <typename TupleT>
677    typename actor_result<self_t, TupleT>::type
678    eval(TupleT const& args) const
679    {
680        typename actor_result<A, TupleT>::type ra = a.eval(args);
681        typename actor_result<B, TupleT>::type rb = b.eval(args);
682        typename actor_result<C, TupleT>::type rc = c.eval(args);
683        typename actor_result<D, TupleT>::type rd = d.eval(args);
684        typename actor_result<E, TupleT>::type re = e.eval(args);
685        typename actor_result<F, TupleT>::type rf = f.eval(args);
686        typename actor_result<G, TupleT>::type rg = g.eval(args);
687        typename actor_result<H, TupleT>::type rh = h.eval(args);
688        return op(ra, rb, rc, rd, re, rf, rg, rh);
689    }
690
691    mutable OperationT op; //  operation
692    A a; B b; C c; D d; E e; F f; G g; H h; //  actors
693};
694
695///////////////////////////////////////////////////////////////////////////////
696//
697//  composite <9 actors> class
698//
699///////////////////////////////////////////////////////////////////////////////
700template <typename OperationT, typename TupleT,
701    typename A, typename B, typename C, typename D, typename E,
702    typename F, typename G, typename H, typename I>
703struct composite9_result {
704
705    typedef typename OperationT::template result<
706        typename actor_result<A, TupleT>::plain_type,
707        typename actor_result<B, TupleT>::plain_type,
708        typename actor_result<C, TupleT>::plain_type,
709        typename actor_result<D, TupleT>::plain_type,
710        typename actor_result<E, TupleT>::plain_type,
711        typename actor_result<F, TupleT>::plain_type,
712        typename actor_result<G, TupleT>::plain_type,
713        typename actor_result<H, TupleT>::plain_type,
714        typename actor_result<I, TupleT>::plain_type
715    >::type type;
716};
717
718//////////////////////////////////
719template <typename OperationT,
720    typename A, typename B, typename C, typename D, typename E,
721    typename F, typename G, typename H, typename I>
722struct composite<OperationT,
723    A, B, C, D, E, F, G, H, I,
724#if PHOENIX_LIMIT > 9
725    nil_t, nil_t, nil_t,
726#if PHOENIX_LIMIT > 12
727    nil_t, nil_t, nil_t,
728#endif
729#endif
730    nil_t   //  Unused
731> {
732
733    typedef composite<OperationT, A, B, C, D, E, F, G, H, I> self_t;
734
735    template <typename TupleT>
736    struct result {
737
738        typedef typename composite9_result<
739            OperationT, TupleT, A, B, C, D, E, F, G, H, I
740        >::type type;
741    };
742
743    composite(OperationT const& op_,
744        A const& a_, B const& b_, C const& c_, D const& d_, E const& e_,
745        F const& f_, G const& g_, H const& h_, I const& i_)
746    :   op(op_), a(a_), b(b_), c(c_), d(d_), e(e_),
747        f(f_), g(g_), h(h_), i(i_) {}
748
749    template <typename TupleT>
750    typename actor_result<self_t, TupleT>::type
751    eval(TupleT const& args) const
752    {
753        typename actor_result<A, TupleT>::type ra = a.eval(args);
754        typename actor_result<B, TupleT>::type rb = b.eval(args);
755        typename actor_result<C, TupleT>::type rc = c.eval(args);
756        typename actor_result<D, TupleT>::type rd = d.eval(args);
757        typename actor_result<E, TupleT>::type re = e.eval(args);
758        typename actor_result<F, TupleT>::type rf = f.eval(args);
759        typename actor_result<G, TupleT>::type rg = g.eval(args);
760        typename actor_result<H, TupleT>::type rh = h.eval(args);
761        typename actor_result<I, TupleT>::type ri = i.eval(args);
762        return op(ra, rb, rc, rd, re, rf, rg, rh, ri);
763    }
764
765    mutable OperationT op; //  operation
766    A a; B b; C c; D d; E e; F f; G g; H h; I i; //  actors
767};
768
769#if PHOENIX_LIMIT > 9
770///////////////////////////////////////////////////////////////////////////////
771//
772//  composite <10 actors> class
773//
774///////////////////////////////////////////////////////////////////////////////
775template <typename OperationT, typename TupleT,
776    typename A, typename B, typename C, typename D, typename E,
777    typename F, typename G, typename H, typename I, typename J>
778struct composite10_result {
779
780    typedef typename OperationT::template result<
781        typename actor_result<A, TupleT>::plain_type,
782        typename actor_result<B, TupleT>::plain_type,
783        typename actor_result<C, TupleT>::plain_type,
784        typename actor_result<D, TupleT>::plain_type,
785        typename actor_result<E, TupleT>::plain_type,
786        typename actor_result<F, TupleT>::plain_type,
787        typename actor_result<G, TupleT>::plain_type,
788        typename actor_result<H, TupleT>::plain_type,
789        typename actor_result<I, TupleT>::plain_type,
790        typename actor_result<J, TupleT>::plain_type
791    >::type type;
792};
793
794//////////////////////////////////
795template <typename OperationT,
796    typename A, typename B, typename C, typename D, typename E,
797    typename F, typename G, typename H, typename I, typename J>
798struct composite<OperationT,
799    A, B, C, D, E, F, G, H, I, J, nil_t, nil_t,
800#if PHOENIX_LIMIT > 12
801    nil_t, nil_t, nil_t,
802#endif
803    nil_t   //  Unused
804> {
805
806    typedef composite<OperationT, A, B, C, D, E, F, G, H, I, J> self_t;
807
808    template <typename TupleT>
809    struct result {
810
811        typedef typename composite10_result<
812            OperationT, TupleT, A, B, C, D, E, F, G, H, I, J
813        >::type type;
814    };
815
816    composite(OperationT const& op_,
817        A const& a_, B const& b_, C const& c_, D const& d_, E const& e_,
818        F const& f_, G const& g_, H const& h_, I const& i_, J const& j_)
819    :   op(op_), a(a_), b(b_), c(c_), d(d_), e(e_),
820        f(f_), g(g_), h(h_), i(i_), j(j_) {}
821
822    template <typename TupleT>
823    typename actor_result<self_t, TupleT>::type
824    eval(TupleT const& args) const
825    {
826        typename actor_result<A, TupleT>::type ra = a.eval(args);
827        typename actor_result<B, TupleT>::type rb = b.eval(args);
828        typename actor_result<C, TupleT>::type rc = c.eval(args);
829        typename actor_result<D, TupleT>::type rd = d.eval(args);
830        typename actor_result<E, TupleT>::type re = e.eval(args);
831        typename actor_result<F, TupleT>::type rf = f.eval(args);
832        typename actor_result<G, TupleT>::type rg = g.eval(args);
833        typename actor_result<H, TupleT>::type rh = h.eval(args);
834        typename actor_result<I, TupleT>::type ri = i.eval(args);
835        typename actor_result<J, TupleT>::type rj = j.eval(args);
836        return op(ra, rb, rc, rd, re, rf, rg, rh, ri, rj);
837    }
838
839    mutable OperationT op; //  operation
840    A a; B b; C c; D d; E e; F f; G g; H h; I i; J j; //  actors
841};
842
843///////////////////////////////////////////////////////////////////////////////
844//
845//  composite <11 actors> class
846//
847///////////////////////////////////////////////////////////////////////////////
848template <typename OperationT, typename TupleT,
849    typename A, typename B, typename C, typename D, typename E,
850    typename F, typename G, typename H, typename I, typename J,
851    typename K>
852struct composite11_result {
853
854    typedef typename OperationT::template result<
855        typename actor_result<A, TupleT>::plain_type,
856        typename actor_result<B, TupleT>::plain_type,
857        typename actor_result<C, TupleT>::plain_type,
858        typename actor_result<D, TupleT>::plain_type,
859        typename actor_result<E, TupleT>::plain_type,
860        typename actor_result<F, TupleT>::plain_type,
861        typename actor_result<G, TupleT>::plain_type,
862        typename actor_result<H, TupleT>::plain_type,
863        typename actor_result<I, TupleT>::plain_type,
864        typename actor_result<J, TupleT>::plain_type,
865        typename actor_result<K, TupleT>::plain_type
866    >::type type;
867};
868
869//////////////////////////////////
870template <typename OperationT,
871    typename A, typename B, typename C, typename D, typename E,
872    typename F, typename G, typename H, typename I, typename J,
873    typename K>
874struct composite<OperationT,
875    A, B, C, D, E, F, G, H, I, J, K, nil_t,
876#if PHOENIX_LIMIT > 12
877    nil_t, nil_t, nil_t,
878#endif
879    nil_t   //  Unused
880> {
881
882    typedef composite<OperationT,
883        A, B, C, D, E, F, G, H, I, J, K> self_t;
884
885    template <typename TupleT>
886    struct result {
887
888        typedef typename composite11_result<
889            OperationT, TupleT, A, B, C, D, E, F, G, H, I, J, K
890        >::type type;
891    };
892
893    composite(OperationT const& op_,
894        A const& a_, B const& b_, C const& c_, D const& d_, E const& e_,
895        F const& f_, G const& g_, H const& h_, I const& i_, J const& j_,
896        K const& k_)
897    :   op(op_), a(a_), b(b_), c(c_), d(d_), e(e_),
898        f(f_), g(g_), h(h_), i(i_), j(j_),
899        k(k_) {}
900
901    template <typename TupleT>
902    typename actor_result<self_t, TupleT>::type
903    eval(TupleT const& args) const
904    {
905        typename actor_result<A, TupleT>::type ra = a.eval(args);
906        typename actor_result<B, TupleT>::type rb = b.eval(args);
907        typename actor_result<C, TupleT>::type rc = c.eval(args);
908        typename actor_result<D, TupleT>::type rd = d.eval(args);
909        typename actor_result<E, TupleT>::type re = e.eval(args);
910        typename actor_result<F, TupleT>::type rf = f.eval(args);
911        typename actor_result<G, TupleT>::type rg = g.eval(args);
912        typename actor_result<H, TupleT>::type rh = h.eval(args);
913        typename actor_result<I, TupleT>::type ri = i.eval(args);
914        typename actor_result<J, TupleT>::type rj = j.eval(args);
915        typename actor_result<K, TupleT>::type rk = k.eval(args);
916        return op(ra, rb, rc, rd, re, rf, rg, rh, ri, rj, rk);
917    }
918
919    mutable OperationT op; //  operation
920    A a; B b; C c; D d; E e; F f; G g; H h; I i; J j;
921    K k;//  actors
922};
923
924///////////////////////////////////////////////////////////////////////////////
925//
926//  composite <12 actors> class
927//
928///////////////////////////////////////////////////////////////////////////////
929template <typename OperationT, typename TupleT,
930    typename A, typename B, typename C, typename D, typename E,
931    typename F, typename G, typename H, typename I, typename J,
932    typename K, typename L>
933struct composite12_result {
934
935    typedef typename OperationT::template result<
936        typename actor_result<A, TupleT>::plain_type,
937        typename actor_result<B, TupleT>::plain_type,
938        typename actor_result<C, TupleT>::plain_type,
939        typename actor_result<D, TupleT>::plain_type,
940        typename actor_result<E, TupleT>::plain_type,
941        typename actor_result<F, TupleT>::plain_type,
942        typename actor_result<G, TupleT>::plain_type,
943        typename actor_result<H, TupleT>::plain_type,
944        typename actor_result<I, TupleT>::plain_type,
945        typename actor_result<J, TupleT>::plain_type,
946        typename actor_result<K, TupleT>::plain_type,
947        typename actor_result<L, TupleT>::plain_type
948    >::type type;
949};
950
951//////////////////////////////////
952template <typename OperationT,
953    typename A, typename B, typename C, typename D, typename E,
954    typename F, typename G, typename H, typename I, typename J,
955    typename K, typename L>
956struct composite<OperationT,
957    A, B, C, D, E, F, G, H, I, J, K, L,
958#if PHOENIX_LIMIT > 12
959    nil_t, nil_t, nil_t,
960#endif
961    nil_t   //  Unused
962> {
963
964    typedef composite<OperationT,
965        A, B, C, D, E, F, G, H, I, J, K, L> self_t;
966
967    template <typename TupleT>
968    struct result {
969
970        typedef typename composite12_result<
971            OperationT, TupleT, A, B, C, D, E, F, G, H, I, J, K, L
972        >::type type;
973    };
974
975    composite(OperationT const& op_,
976        A const& a_, B const& b_, C const& c_, D const& d_, E const& e_,
977        F const& f_, G const& g_, H const& h_, I const& i_, J const& j_,
978        K const& k_, L const& l_)
979    :   op(op_), a(a_), b(b_), c(c_), d(d_), e(e_),
980        f(f_), g(g_), h(h_), i(i_), j(j_),
981        k(k_), l(l_) {}
982
983    template <typename TupleT>
984    typename actor_result<self_t, TupleT>::type
985    eval(TupleT const& args) const
986    {
987        typename actor_result<A, TupleT>::type ra = a.eval(args);
988        typename actor_result<B, TupleT>::type rb = b.eval(args);
989        typename actor_result<C, TupleT>::type rc = c.eval(args);
990        typename actor_result<D, TupleT>::type rd = d.eval(args);
991        typename actor_result<E, TupleT>::type re = e.eval(args);
992        typename actor_result<F, TupleT>::type rf = f.eval(args);
993        typename actor_result<G, TupleT>::type rg = g.eval(args);
994        typename actor_result<H, TupleT>::type rh = h.eval(args);
995        typename actor_result<I, TupleT>::type ri = i.eval(args);
996        typename actor_result<J, TupleT>::type rj = j.eval(args);
997        typename actor_result<K, TupleT>::type rk = k.eval(args);
998        typename actor_result<L, TupleT>::type rl = l.eval(args);
999        return op(ra, rb, rc, rd, re, rf, rg, rh, ri, rj, rk, rl);
1000    }
1001
1002    mutable OperationT op; //  operation
1003    A a; B b; C c; D d; E e; F f; G g; H h; I i; J j;
1004    K k; L l;//  actors
1005};
1006
1007#if PHOENIX_LIMIT > 12
1008///////////////////////////////////////////////////////////////////////////////
1009//
1010//  composite <13 actors> class
1011//
1012///////////////////////////////////////////////////////////////////////////////
1013template <typename OperationT, typename TupleT,
1014    typename A, typename B, typename C, typename D, typename E,
1015    typename F, typename G, typename H, typename I, typename J,
1016    typename K, typename L, typename M>
1017struct composite13_result {
1018
1019    typedef typename OperationT::template result<
1020        typename actor_result<A, TupleT>::plain_type,
1021        typename actor_result<B, TupleT>::plain_type,
1022        typename actor_result<C, TupleT>::plain_type,
1023        typename actor_result<D, TupleT>::plain_type,
1024        typename actor_result<E, TupleT>::plain_type,
1025        typename actor_result<F, TupleT>::plain_type,
1026        typename actor_result<G, TupleT>::plain_type,
1027        typename actor_result<H, TupleT>::plain_type,
1028        typename actor_result<I, TupleT>::plain_type,
1029        typename actor_result<J, TupleT>::plain_type,
1030        typename actor_result<K, TupleT>::plain_type,
1031        typename actor_result<L, TupleT>::plain_type,
1032        typename actor_result<M, TupleT>::plain_type
1033    >::type type;
1034};
1035
1036//////////////////////////////////
1037template <typename OperationT,
1038    typename A, typename B, typename C, typename D, typename E,
1039    typename F, typename G, typename H, typename I, typename J,
1040    typename K, typename L, typename M>
1041struct composite<OperationT,
1042    A, B, C, D, E, F, G, H, I, J, K, L, M, nil_t, nil_t, nil_t
1043> {
1044
1045    typedef composite<OperationT,
1046        A, B, C, D, E, F, G, H, I, J, K, L, M> self_t;
1047
1048    template <typename TupleT>
1049    struct result {
1050
1051        typedef typename composite13_result<
1052            OperationT, TupleT, A, B, C, D, E, F, G, H, I, J, K, L, M
1053        >::type type;
1054    };
1055
1056    composite(OperationT const& op_,
1057        A const& a_, B const& b_, C const& c_, D const& d_, E const& e_,
1058        F const& f_, G const& g_, H const& h_, I const& i_, J const& j_,
1059        K const& k_, L const& l_, M const& m_)
1060    :   op(op_), a(a_), b(b_), c(c_), d(d_), e(e_),
1061        f(f_), g(g_), h(h_), i(i_), j(j_),
1062        k(k_), l(l_), m(m_) {}
1063
1064    template <typename TupleT>
1065    typename actor_result<self_t, TupleT>::type
1066    eval(TupleT const& args) const
1067    {
1068        typename actor_result<A, TupleT>::type ra = a.eval(args);
1069        typename actor_result<B, TupleT>::type rb = b.eval(args);
1070        typename actor_result<C, TupleT>::type rc = c.eval(args);
1071        typename actor_result<D, TupleT>::type rd = d.eval(args);
1072        typename actor_result<E, TupleT>::type re = e.eval(args);
1073        typename actor_result<F, TupleT>::type rf = f.eval(args);
1074        typename actor_result<G, TupleT>::type rg = g.eval(args);
1075        typename actor_result<H, TupleT>::type rh = h.eval(args);
1076        typename actor_result<I, TupleT>::type ri = i.eval(args);
1077        typename actor_result<J, TupleT>::type rj = j.eval(args);
1078        typename actor_result<K, TupleT>::type rk = k.eval(args);
1079        typename actor_result<L, TupleT>::type rl = l.eval(args);
1080        typename actor_result<M, TupleT>::type rm = m.eval(args);
1081        return op(ra, rb, rc, rd, re, rf, rg, rh, ri, rj, rk, rl, rm);
1082    }
1083
1084    mutable OperationT op; //  operation
1085    A a; B b; C c; D d; E e; F f; G g; H h; I i; J j;
1086    K k; L l; M m; //  actors
1087};
1088
1089///////////////////////////////////////////////////////////////////////////////
1090//
1091//  composite <14 actors> class
1092//
1093///////////////////////////////////////////////////////////////////////////////
1094template <typename OperationT, typename TupleT,
1095    typename A, typename B, typename C, typename D, typename E,
1096    typename F, typename G, typename H, typename I, typename J,
1097    typename K, typename L, typename M, typename N>
1098struct composite14_result {
1099
1100    typedef typename OperationT::template result<
1101        typename actor_result<A, TupleT>::plain_type,
1102        typename actor_result<B, TupleT>::plain_type,
1103        typename actor_result<C, TupleT>::plain_type,
1104        typename actor_result<D, TupleT>::plain_type,
1105        typename actor_result<E, TupleT>::plain_type,
1106        typename actor_result<F, TupleT>::plain_type,
1107        typename actor_result<G, TupleT>::plain_type,
1108        typename actor_result<H, TupleT>::plain_type,
1109        typename actor_result<I, TupleT>::plain_type,
1110        typename actor_result<J, TupleT>::plain_type,
1111        typename actor_result<K, TupleT>::plain_type,
1112        typename actor_result<L, TupleT>::plain_type,
1113        typename actor_result<M, TupleT>::plain_type,
1114        typename actor_result<N, TupleT>::plain_type
1115    >::type type;
1116};
1117
1118//////////////////////////////////
1119template <typename OperationT,
1120    typename A, typename B, typename C, typename D, typename E,
1121    typename F, typename G, typename H, typename I, typename J,
1122    typename K, typename L, typename M, typename N>
1123struct composite<OperationT,
1124    A, B, C, D, E, F, G, H, I, J, K, L, M, N, nil_t, nil_t
1125> {
1126
1127    typedef composite<OperationT,
1128        A, B, C, D, E, F, G, H, I, J, K, L, M, N> self_t;
1129
1130    template <typename TupleT>
1131    struct result {
1132
1133        typedef typename composite14_result<
1134            OperationT, TupleT, A, B, C, D, E, F, G, H, I, J, K, L, M, N
1135        >::type type;
1136    };
1137
1138    composite(OperationT const& op_,
1139        A const& a_, B const& b_, C const& c_, D const& d_, E const& e_,
1140        F const& f_, G const& g_, H const& h_, I const& i_, J const& j_,
1141        K const& k_, L const& l_, M const& m_, N const& n_)
1142    :   op(op_), a(a_), b(b_), c(c_), d(d_), e(e_),
1143        f(f_), g(g_), h(h_), i(i_), j(j_),
1144        k(k_), l(l_), m(m_), n(n_) {}
1145
1146    template <typename TupleT>
1147    typename actor_result<self_t, TupleT>::type
1148    eval(TupleT const& args) const
1149    {
1150        typename actor_result<A, TupleT>::type ra = a.eval(args);
1151        typename actor_result<B, TupleT>::type rb = b.eval(args);
1152        typename actor_result<C, TupleT>::type rc = c.eval(args);
1153        typename actor_result<D, TupleT>::type rd = d.eval(args);
1154        typename actor_result<E, TupleT>::type re = e.eval(args);
1155        typename actor_result<F, TupleT>::type rf = f.eval(args);
1156        typename actor_result<G, TupleT>::type rg = g.eval(args);
1157        typename actor_result<H, TupleT>::type rh = h.eval(args);
1158        typename actor_result<I, TupleT>::type ri = i.eval(args);
1159        typename actor_result<J, TupleT>::type rj = j.eval(args);
1160        typename actor_result<K, TupleT>::type rk = k.eval(args);
1161        typename actor_result<L, TupleT>::type rl = l.eval(args);
1162        typename actor_result<M, TupleT>::type rm = m.eval(args);
1163        typename actor_result<N, TupleT>::type rn = n.eval(args);
1164        return op(ra, rb, rc, rd, re, rf, rg, rh, ri, rj, rk, rl, rm, rn);
1165    }
1166
1167    mutable OperationT op; //  operation
1168    A a; B b; C c; D d; E e; F f; G g; H h; I i; J j;
1169    K k; L l; M m; N n; //  actors
1170};
1171
1172///////////////////////////////////////////////////////////////////////////////
1173//
1174//  composite <15 actors> class
1175//
1176///////////////////////////////////////////////////////////////////////////////
1177template <typename OperationT, typename TupleT,
1178    typename A, typename B, typename C, typename D, typename E,
1179    typename F, typename G, typename H, typename I, typename J,
1180    typename K, typename L, typename M, typename N, typename O>
1181struct composite15_result {
1182
1183    typedef typename OperationT::template result<
1184        typename actor_result<A, TupleT>::plain_type,
1185        typename actor_result<B, TupleT>::plain_type,
1186        typename actor_result<C, TupleT>::plain_type,
1187        typename actor_result<D, TupleT>::plain_type,
1188        typename actor_result<E, TupleT>::plain_type,
1189        typename actor_result<F, TupleT>::plain_type,
1190        typename actor_result<G, TupleT>::plain_type,
1191        typename actor_result<H, TupleT>::plain_type,
1192        typename actor_result<I, TupleT>::plain_type,
1193        typename actor_result<J, TupleT>::plain_type,
1194        typename actor_result<K, TupleT>::plain_type,
1195        typename actor_result<L, TupleT>::plain_type,
1196        typename actor_result<M, TupleT>::plain_type,
1197        typename actor_result<N, TupleT>::plain_type,
1198        typename actor_result<O, TupleT>::plain_type
1199    >::type type;
1200};
1201
1202//////////////////////////////////
1203template <typename OperationT,
1204    typename A, typename B, typename C, typename D, typename E,
1205    typename F, typename G, typename H, typename I, typename J,
1206    typename K, typename L, typename M, typename N, typename O>
1207struct composite<OperationT,
1208    A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, nil_t
1209> {
1210
1211    typedef composite<OperationT,
1212        A, B, C, D, E, F, G, H, I, J, K, L, M, N, O> self_t;
1213
1214    template <typename TupleT>
1215    struct result {
1216
1217        typedef typename composite15_result<
1218            OperationT, TupleT, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O
1219        >::type type;
1220    };
1221
1222    composite(OperationT const& op_,
1223        A const& a_, B const& b_, C const& c_, D const& d_, E const& e_,
1224        F const& f_, G const& g_, H const& h_, I const& i_, J const& j_,
1225        K const& k_, L const& l_, M const& m_, N const& n_, O const& o_)
1226    :   op(op_), a(a_), b(b_), c(c_), d(d_), e(e_),
1227        f(f_), g(g_), h(h_), i(i_), j(j_),
1228        k(k_), l(l_), m(m_), n(n_), o(o_) {}
1229
1230    template <typename TupleT>
1231    typename actor_result<self_t, TupleT>::type
1232    eval(TupleT const& args) const
1233    {
1234        typename actor_result<A, TupleT>::type ra = a.eval(args);
1235        typename actor_result<B, TupleT>::type rb = b.eval(args);
1236        typename actor_result<C, TupleT>::type rc = c.eval(args);
1237        typename actor_result<D, TupleT>::type rd = d.eval(args);
1238        typename actor_result<E, TupleT>::type re = e.eval(args);
1239        typename actor_result<F, TupleT>::type rf = f.eval(args);
1240        typename actor_result<G, TupleT>::type rg = g.eval(args);
1241        typename actor_result<H, TupleT>::type rh = h.eval(args);
1242        typename actor_result<I, TupleT>::type ri = i.eval(args);
1243        typename actor_result<J, TupleT>::type rj = j.eval(args);
1244        typename actor_result<K, TupleT>::type rk = k.eval(args);
1245        typename actor_result<L, TupleT>::type rl = l.eval(args);
1246        typename actor_result<M, TupleT>::type rm = m.eval(args);
1247        typename actor_result<N, TupleT>::type rn = n.eval(args);
1248        typename actor_result<O, TupleT>::type ro = o.eval(args);
1249        return op(ra, rb, rc, rd, re, rf, rg, rh, ri, rj, rk, rl, rm, rn, ro);
1250    }
1251
1252    mutable OperationT op; //  operation
1253    A a; B b; C c; D d; E e; F f; G g; H h; I i; J j;
1254    K k; L l; M m; N n; O o; //  actors
1255};
1256
1257#endif
1258#endif
1259#endif
1260#endif
1261
1262namespace impl {
1263
1264    ///////////////////////////////////////////////////////////////////////////
1265    //
1266    //      make_composite is basically a type computer that answers the
1267    //      question "Given types T0..TN, what composite type should I
1268    //      create <composite_type> and if I were to generate an actual
1269    //      composite, what type <type> should I return?"
1270    //
1271    ///////////////////////////////////////////////////////////////////////////
1272    template <
1273        typename OperationT
1274        ,   typename A = nil_t
1275        ,   typename B = nil_t
1276        ,   typename C = nil_t
1277
1278#if PHOENIX_LIMIT > 3
1279        ,   typename D = nil_t
1280        ,   typename E = nil_t
1281        ,   typename F = nil_t
1282
1283#if PHOENIX_LIMIT > 6
1284        ,   typename G = nil_t
1285        ,   typename H = nil_t
1286        ,   typename I = nil_t
1287
1288#if PHOENIX_LIMIT > 9
1289        ,   typename J = nil_t
1290        ,   typename K = nil_t
1291        ,   typename L = nil_t
1292
1293#if PHOENIX_LIMIT > 12
1294        ,   typename M = nil_t
1295        ,   typename N = nil_t
1296        ,   typename O = nil_t
1297
1298#endif
1299#endif
1300#endif
1301#endif
1302    >
1303    struct make_composite {
1304
1305        typedef composite<OperationT
1306            ,   typename as_actor<A>::type
1307            ,   typename as_actor<B>::type
1308            ,   typename as_actor<C>::type
1309
1310#if PHOENIX_LIMIT > 3
1311            ,   typename as_actor<D>::type
1312            ,   typename as_actor<E>::type
1313            ,   typename as_actor<F>::type
1314
1315#if PHOENIX_LIMIT > 6
1316            ,   typename as_actor<G>::type
1317            ,   typename as_actor<H>::type
1318            ,   typename as_actor<I>::type
1319
1320#if PHOENIX_LIMIT > 9
1321            ,   typename as_actor<J>::type
1322            ,   typename as_actor<K>::type
1323            ,   typename as_actor<L>::type
1324
1325#if PHOENIX_LIMIT > 12
1326            ,   typename as_actor<M>::type
1327            ,   typename as_actor<N>::type
1328            ,   typename as_actor<O>::type
1329
1330#endif
1331#endif
1332#endif
1333#endif
1334        > composite_type;
1335
1336        typedef actor<composite_type> type;
1337    };
1338
1339    ///////////////////////////////////////////////////////////////////////////
1340    //
1341    //      make_unary, make_binary, make_binary1, make_binary2 and
1342    //      make_binary3 utilities are provided here for easy creation of
1343    //      unary and binary composites.
1344    //
1345    ///////////////////////////////////////////////////////////////////////////
1346
1347    //////////////////////////////////  input is an actor
1348    template <typename OperationT, typename BaseT>
1349    struct make_unary {
1350
1351        typedef typename make_composite
1352            <OperationT, actor<BaseT> >::type type;
1353
1354        static type
1355        construct(actor<BaseT> const& _0)
1356        {
1357            typedef typename make_composite
1358                    <OperationT, actor<BaseT> >::composite_type
1359                ret_t;
1360
1361            return ret_t(OperationT(), _0);
1362        }
1363    };
1364
1365    //////////////////////////////////  LHS is an actor, RHS is unknown
1366    template <typename OperationT, typename BaseT, typename B>
1367    struct make_binary1 {
1368
1369        typedef typename make_composite
1370            <OperationT, actor<BaseT>, B>::type type;
1371
1372        static type
1373        construct(actor<BaseT> const& _0, B const& _1)
1374        {
1375            typedef typename make_composite
1376                    <OperationT, actor<BaseT>, B>::composite_type
1377                ret_t;
1378           
1379            return ret_t(OperationT(), _0, as_actor<B>::convert(_1));
1380        }
1381    };
1382
1383    //////////////////////////////////  LHS is unknown, RHS is an actor
1384    template <typename OperationT, typename A, typename BaseT>
1385    struct make_binary2 {
1386
1387        typedef typename make_composite
1388            <OperationT, A, actor<BaseT> >::type type;
1389
1390        static type
1391        construct(A const& _0, actor<BaseT> const& _1)
1392        {
1393            typedef typename make_composite
1394                    <OperationT, A, actor<BaseT> >::composite_type
1395                ret_t;
1396
1397            return ret_t(OperationT(), as_actor<A>::convert(_0), _1);
1398        }
1399    };
1400
1401    //////////////////////////////////  Both LHS and RHS are actors
1402    template <typename OperationT, typename BaseA, typename BaseB>
1403    struct make_binary3 {
1404
1405        typedef typename make_composite
1406            <OperationT, actor<BaseA>, actor<BaseB> >::type type;
1407
1408        static type
1409        construct(actor<BaseA> const& _0, actor<BaseB> const& _1)
1410        {
1411            typedef typename make_composite
1412                    <OperationT, actor<BaseA>, actor<BaseB> >::composite_type
1413                ret_t;
1414
1415            return ret_t(OperationT(), _0, _1);
1416        }
1417    };
1418
1419}   // namespace impl
1420
1421}   //  namespace phoenix
1422
1423#endif
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