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source: downloads/boost_1_33_1/boost/mpl/bind.hpp @ 18

Last change on this file since 18 was 12, checked in by landauf, 17 years ago

added boost
File size: 14.5 KB
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1
2#if !defined(BOOST_PP_IS_ITERATING)
3
4///// header body
5
6#ifndef BOOST_MPL_BIND_HPP_INCLUDED
7#define BOOST_MPL_BIND_HPP_INCLUDED
8
9// Copyright Peter Dimov 2001
10// Copyright Aleksey Gurtovoy 2001-2004
11//
12// Distributed under the Boost Software License, Version 1.0.
13// (See accompanying file LICENSE_1_0.txt or copy at
14// http://www.boost.org/LICENSE_1_0.txt)
15//
16// See http://www.boost.org/libs/mpl for documentation.
17
18// $Source: /cvsroot/boost/boost/boost/mpl/bind.hpp,v $
19// $Date: 2004/10/26 14:51:04 $
20// $Revision: 1.13 $
21
22#if !defined(BOOST_MPL_PREPROCESSING_MODE)
23#   include <boost/mpl/bind_fwd.hpp>
24#   include <boost/mpl/placeholders.hpp>
25#   include <boost/mpl/next.hpp>
26#   include <boost/mpl/protect.hpp>
27#   include <boost/mpl/apply_wrap.hpp>
28#   include <boost/mpl/limits/arity.hpp>
29#   include <boost/mpl/aux_/na.hpp>
30#   include <boost/mpl/aux_/arity_spec.hpp>
31#   include <boost/mpl/aux_/type_wrapper.hpp>
32#   include <boost/mpl/aux_/yes_no.hpp>
33#   if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
34#       include <boost/type_traits/is_reference.hpp>
35#   endif
36#endif
37
38#include <boost/mpl/aux_/config/bind.hpp>
39#include <boost/mpl/aux_/config/static_constant.hpp>
40#include <boost/mpl/aux_/config/use_preprocessed.hpp>
41
42#if !defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) \
43    && !defined(BOOST_MPL_PREPROCESSING_MODE)
44
45#   if defined(BOOST_MPL_CFG_NO_UNNAMED_PLACEHOLDER_SUPPORT)
46#       define BOOST_MPL_PREPROCESSED_HEADER basic_bind.hpp
47#   else
48#       define BOOST_MPL_PREPROCESSED_HEADER bind.hpp
49#   endif
50#   include <boost/mpl/aux_/include_preprocessed.hpp>
51
52#else
53
54#   include <boost/mpl/aux_/preprocessor/params.hpp>
55#   include <boost/mpl/aux_/preprocessor/default_params.hpp>
56#   include <boost/mpl/aux_/preprocessor/def_params_tail.hpp>
57#   include <boost/mpl/aux_/preprocessor/partial_spec_params.hpp>
58#   include <boost/mpl/aux_/preprocessor/ext_params.hpp>
59#   include <boost/mpl/aux_/preprocessor/repeat.hpp>
60#   include <boost/mpl/aux_/preprocessor/enum.hpp>
61#   include <boost/mpl/aux_/preprocessor/add.hpp>
62#   include <boost/mpl/aux_/config/dmc_ambiguous_ctps.hpp>
63#   include <boost/mpl/aux_/config/ctps.hpp>
64#   include <boost/mpl/aux_/config/ttp.hpp>
65#   include <boost/mpl/aux_/config/dtp.hpp>
66#   include <boost/mpl/aux_/nttp_decl.hpp>
67
68#   include <boost/preprocessor/iterate.hpp>
69#   include <boost/preprocessor/comma_if.hpp>
70#   include <boost/preprocessor/cat.hpp>
71#   include <boost/preprocessor/inc.hpp>
72
73namespace boost { namespace mpl {
74
75// local macros, #undef-ined at the end of the header
76#   define AUX778076_APPLY \
77    BOOST_PP_CAT(apply_wrap,BOOST_MPL_LIMIT_METAFUNCTION_ARITY) \
78    /**/
79
80#   if defined(BOOST_MPL_CFG_DMC_AMBIGUOUS_CTPS)
81#       define AUX778076_DMC_PARAM() , int dummy_
82#   else
83#       define AUX778076_DMC_PARAM()
84#   endif
85
86#   define AUX778076_BIND_PARAMS(param) \
87    BOOST_MPL_PP_PARAMS( \
88          BOOST_MPL_LIMIT_METAFUNCTION_ARITY \
89        , param \
90        ) \
91    /**/
92
93#   define AUX778076_BIND_DEFAULT_PARAMS(param, value) \
94    BOOST_MPL_PP_DEFAULT_PARAMS( \
95          BOOST_MPL_LIMIT_METAFUNCTION_ARITY \
96        , param \
97        , value \
98        ) \
99    /**/
100
101#   define AUX778076_BIND_N_PARAMS(n, param) \
102    BOOST_PP_COMMA_IF(n) BOOST_MPL_PP_PARAMS(n, param) \
103    /**/
104
105#   define AUX778076_BIND_N_SPEC_PARAMS(n, param, def) \
106    BOOST_PP_COMMA_IF(n) \
107    BOOST_MPL_PP_PARTIAL_SPEC_PARAMS(n, param, def) \
108    /**/
109
110#if !defined(BOOST_MPL_CFG_NO_DEFAULT_PARAMETERS_IN_NESTED_TEMPLATES)
111#   define AUX778076_BIND_NESTED_DEFAULT_PARAMS(param, value) \
112    AUX778076_BIND_DEFAULT_PARAMS(param, value) \
113    /**/
114#else
115#   define AUX778076_BIND_NESTED_DEFAULT_PARAMS(param, value) \
116    AUX778076_BIND_PARAMS(param) \
117    /**/
118#endif
119
120namespace aux {
121
122#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
123
124template<
125      typename T, AUX778076_BIND_PARAMS(typename U)
126    >
127struct resolve_bind_arg
128{
129    typedef T type;
130};
131
132#   if !defined(BOOST_MPL_CFG_NO_UNNAMED_PLACEHOLDER_SUPPORT)
133
134template<
135      typename T
136    , typename Arg
137    >
138struct replace_unnamed_arg
139{
140    typedef Arg next;
141    typedef T type;
142};
143
144template<
145      typename Arg
146    >
147struct replace_unnamed_arg< arg<-1>,Arg >
148{
149    typedef typename Arg::next next;
150    typedef Arg type;
151};
152
153#   endif // BOOST_MPL_CFG_NO_UNNAMED_PLACEHOLDER_SUPPORT
154
155template<
156      BOOST_MPL_AUX_NTTP_DECL(int, N), AUX778076_BIND_PARAMS(typename U)
157    >
158struct resolve_bind_arg< arg<N>,AUX778076_BIND_PARAMS(U) >
159{
160    typedef typename AUX778076_APPLY<mpl::arg<N>, AUX778076_BIND_PARAMS(U)>::type type;
161};
162
163#if !defined(BOOST_MPL_CFG_NO_BIND_TEMPLATE)
164template<
165      typename F, AUX778076_BIND_PARAMS(typename T), AUX778076_BIND_PARAMS(typename U)
166    >
167struct resolve_bind_arg< bind<F,AUX778076_BIND_PARAMS(T)>,AUX778076_BIND_PARAMS(U) >
168{
169    typedef bind<F,AUX778076_BIND_PARAMS(T)> f_;
170    typedef typename AUX778076_APPLY<f_, AUX778076_BIND_PARAMS(U)>::type type;
171};
172#endif
173
174#else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
175
176// agurt, 15/jan/02: it's not a intended to be used as a function class, and
177// MSVC6.5 has problems with 'apply' name here (the code compiles, but doesn't
178// work), so I went with the 'result_' here, and in all other similar cases
179template< bool >
180struct resolve_arg_impl
181{
182    template< typename T, AUX778076_BIND_PARAMS(typename U) > struct result_
183    {
184        typedef T type;
185    };
186};
187
188template<> 
189struct resolve_arg_impl<true>
190{
191    template< typename T, AUX778076_BIND_PARAMS(typename U) > struct result_
192    {
193        typedef typename AUX778076_APPLY<
194              T
195            , AUX778076_BIND_PARAMS(U)
196            >::type type;
197    };
198};
199
200// for 'resolve_bind_arg'
201template< typename T > struct is_bind_template;
202
203template< 
204      typename T, AUX778076_BIND_PARAMS(typename U)
205    >
206struct resolve_bind_arg
207    : resolve_arg_impl< is_bind_template<T>::value >
208            ::template result_< T,AUX778076_BIND_PARAMS(U) >
209{
210};
211
212#   if !defined(BOOST_MPL_CFG_NO_UNNAMED_PLACEHOLDER_SUPPORT)
213
214template< typename T > 
215struct replace_unnamed_arg_impl
216{
217    template< typename Arg > struct result_
218    {
219        typedef Arg next;
220        typedef T type;
221    };
222};
223
224template<> 
225struct replace_unnamed_arg_impl< arg<-1> >
226{
227    template< typename Arg > struct result_
228    {
229        typedef typename next<Arg>::type next;
230        typedef Arg type;
231    };
232};
233
234template< typename T, typename Arg > 
235struct replace_unnamed_arg
236    : replace_unnamed_arg_impl<T>::template result_<Arg>
237{
238};
239
240#   endif // BOOST_MPL_CFG_NO_UNNAMED_PLACEHOLDER_SUPPORT
241
242// agurt, 10/mar/02: the forward declaration has to appear before any of
243// 'is_bind_helper' overloads, otherwise MSVC6.5 issues an ICE on it
244template< BOOST_MPL_AUX_NTTP_DECL(int, arity_) > struct bind_chooser;
245
246aux::no_tag is_bind_helper(...);
247template< typename T > aux::no_tag is_bind_helper(protect<T>*);
248
249// overload for "main" form
250// agurt, 15/mar/02: MSVC 6.5 fails to properly resolve the overload
251// in case if we use 'aux::type_wrapper< bind<...> >' here, and all
252// 'bind' instantiations form a complete type anyway
253#if !defined(BOOST_MPL_CFG_NO_BIND_TEMPLATE)
254template<
255      typename F, AUX778076_BIND_PARAMS(typename T)
256    >
257aux::yes_tag is_bind_helper(bind<F,AUX778076_BIND_PARAMS(T)>*);
258#endif
259
260template< BOOST_MPL_AUX_NTTP_DECL(int, N) >
261aux::yes_tag is_bind_helper(arg<N>*);
262
263template< bool is_ref_ = true >
264struct is_bind_template_impl
265{
266    template< typename T > struct result_
267    {
268        BOOST_STATIC_CONSTANT(bool, value = false);
269    };
270};
271
272template<>
273struct is_bind_template_impl<false>
274{
275    template< typename T > struct result_
276    {
277        BOOST_STATIC_CONSTANT(bool, value = 
278              sizeof(aux::is_bind_helper(static_cast<T*>(0))) 
279                == sizeof(aux::yes_tag)
280            );
281    };
282};
283
284template< typename T > struct is_bind_template
285    : is_bind_template_impl< ::boost::detail::is_reference_impl<T>::value >
286        ::template result_<T>
287{
288};
289
290#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
291
292} // namespace aux
293
294
295#define BOOST_PP_ITERATION_PARAMS_1 \
296    (3,(0, BOOST_MPL_LIMIT_METAFUNCTION_ARITY, <boost/mpl/bind.hpp>))
297#include BOOST_PP_ITERATE()
298
299#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
300    && !defined(BOOST_MPL_CFG_NO_TEMPLATE_TEMPLATE_PARAMETERS)
301/// if_/eval_if specializations
302#   define AUX778076_SPEC_NAME if_
303#   define BOOST_PP_ITERATION_PARAMS_1 (3,(3, 3, <boost/mpl/bind.hpp>))
304#   include BOOST_PP_ITERATE()
305
306#if !defined(BOOST_MPL_CFG_DMC_AMBIGUOUS_CTPS)
307#   define AUX778076_SPEC_NAME eval_if
308#   define BOOST_PP_ITERATION_PARAMS_1 (3,(3, 3, <boost/mpl/bind.hpp>))
309#   include BOOST_PP_ITERATE()
310#endif
311#endif
312
313// real C++ version is already taken care of
314#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
315    && !defined(BOOST_MPL_CFG_NO_BIND_TEMPLATE)
316
317namespace aux {
318// apply_count_args
319#define AUX778076_COUNT_ARGS_PREFIX bind
320#define AUX778076_COUNT_ARGS_DEFAULT na
321#define AUX778076_COUNT_ARGS_ARITY BOOST_MPL_LIMIT_METAFUNCTION_ARITY
322#include <boost/mpl/aux_/count_args.hpp>
323}
324
325// bind
326template<
327      typename F, AUX778076_BIND_PARAMS(typename T) AUX778076_DMC_PARAM()
328    >
329struct bind
330    : aux::bind_chooser<
331          aux::bind_count_args<AUX778076_BIND_PARAMS(T)>::value
332        >::template result_< F,AUX778076_BIND_PARAMS(T) >::type
333{
334};
335
336BOOST_MPL_AUX_ARITY_SPEC(
337      BOOST_PP_INC(BOOST_MPL_LIMIT_METAFUNCTION_ARITY)
338    , bind
339    )
340
341BOOST_MPL_AUX_TEMPLATE_ARITY_SPEC(
342      BOOST_PP_INC(BOOST_MPL_LIMIT_METAFUNCTION_ARITY)
343    , bind
344    )
345
346
347#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
348
349#   undef AUX778076_BIND_NESTED_DEFAULT_PARAMS
350#   undef AUX778076_BIND_N_SPEC_PARAMS
351#   undef AUX778076_BIND_N_PARAMS
352#   undef AUX778076_BIND_DEFAULT_PARAMS
353#   undef AUX778076_BIND_PARAMS
354#   undef AUX778076_DMC_PARAM
355#   undef AUX778076_APPLY
356
357}}
358
359#endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS
360#endif // BOOST_MPL_BIND_HPP_INCLUDED
361
362///// iteration, depth == 1
363
364#elif BOOST_PP_ITERATION_DEPTH() == 1
365
366#   define i_ BOOST_PP_FRAME_ITERATION(1)
367
368#if defined(AUX778076_SPEC_NAME)
369
370// lazy metafunction specialization
371template< template< BOOST_MPL_PP_PARAMS(i_, typename T) > class F, typename Tag >
372struct BOOST_PP_CAT(quote,i_);
373
374template< BOOST_MPL_PP_PARAMS(i_, typename T) > struct AUX778076_SPEC_NAME;
375
376template<
377      typename Tag AUX778076_BIND_N_PARAMS(i_, typename T)
378    >
379struct BOOST_PP_CAT(bind,i_)< 
380      BOOST_PP_CAT(quote,i_)<AUX778076_SPEC_NAME,Tag>
381    AUX778076_BIND_N_PARAMS(i_,T)
382    >
383{
384    template<
385          AUX778076_BIND_NESTED_DEFAULT_PARAMS(typename U, na)
386        >
387    struct apply
388    {
389     private:
390        typedef mpl::arg<1> n1;
391#       define BOOST_PP_ITERATION_PARAMS_2 (3,(1, i_, <boost/mpl/bind.hpp>))
392#       include BOOST_PP_ITERATE()
393
394        typedef typename AUX778076_SPEC_NAME<
395              typename t1::type
396            , BOOST_MPL_PP_EXT_PARAMS(2, BOOST_PP_INC(i_), t)
397            >::type f_;
398
399     public:
400        typedef typename f_::type type;
401    };
402};
403
404#undef AUX778076_SPEC_NAME
405
406#else // AUX778076_SPEC_NAME
407
408template<
409      typename F AUX778076_BIND_N_PARAMS(i_, typename T) AUX778076_DMC_PARAM()
410    >
411struct BOOST_PP_CAT(bind,i_)
412{
413    template<
414          AUX778076_BIND_NESTED_DEFAULT_PARAMS(typename U, na)
415        >
416    struct apply
417    {
418     private:
419#   if !defined(BOOST_MPL_CFG_NO_UNNAMED_PLACEHOLDER_SUPPORT)
420
421        typedef aux::replace_unnamed_arg< F,mpl::arg<1> > r0;
422        typedef typename r0::type a0;
423        typedef typename r0::next n1;
424        typedef typename aux::resolve_bind_arg<a0,AUX778076_BIND_PARAMS(U)>::type f_;
425        ///
426#   else
427        typedef typename aux::resolve_bind_arg<F,AUX778076_BIND_PARAMS(U)>::type f_;
428
429#   endif // BOOST_MPL_CFG_NO_UNNAMED_PLACEHOLDER_SUPPORT
430
431#   if i_ > 0
432#       define BOOST_PP_ITERATION_PARAMS_2 (3,(1, i_, <boost/mpl/bind.hpp>))
433#       include BOOST_PP_ITERATE()
434#   endif
435
436     public:
437
438#   define AUX778076_ARG(unused, i_, t) \
439    BOOST_PP_COMMA_IF(i_) \
440    typename BOOST_PP_CAT(t,BOOST_PP_INC(i_))::type \
441/**/
442
443        typedef typename BOOST_PP_CAT(apply_wrap,i_)<
444              f_
445            BOOST_PP_COMMA_IF(i_) BOOST_MPL_PP_REPEAT(i_, AUX778076_ARG, t)
446            >::type type;
447
448#   undef AUX778076_ARG
449    };
450};
451
452namespace aux {
453
454#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
455
456template<
457      typename F AUX778076_BIND_N_PARAMS(i_, typename T), AUX778076_BIND_PARAMS(typename U)
458    >
459struct resolve_bind_arg<
460      BOOST_PP_CAT(bind,i_)<F AUX778076_BIND_N_PARAMS(i_,T)>,AUX778076_BIND_PARAMS(U)
461    >
462{
463    typedef BOOST_PP_CAT(bind,i_)<F AUX778076_BIND_N_PARAMS(i_,T)> f_;
464    typedef typename AUX778076_APPLY<f_, AUX778076_BIND_PARAMS(U)>::type type;
465};
466
467#else
468
469template<
470      typename F AUX778076_BIND_N_PARAMS(i_, typename T)
471    >
472aux::yes_tag
473is_bind_helper(BOOST_PP_CAT(bind,i_)<F AUX778076_BIND_N_PARAMS(i_,T)>*);
474
475#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
476
477} // namespace aux
478
479BOOST_MPL_AUX_ARITY_SPEC(BOOST_PP_INC(i_), BOOST_PP_CAT(bind,i_))
480BOOST_MPL_AUX_TEMPLATE_ARITY_SPEC(BOOST_PP_INC(i_), BOOST_PP_CAT(bind,i_))
481
482#   if !defined(BOOST_MPL_CFG_NO_BIND_TEMPLATE)
483#   if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
484   
485#if i_ == BOOST_MPL_LIMIT_METAFUNCTION_ARITY
486/// primary template (not a specialization!)
487template<
488      typename F AUX778076_BIND_N_PARAMS(i_, typename T) AUX778076_DMC_PARAM()
489    >
490struct bind
491    : BOOST_PP_CAT(bind,i_)<F AUX778076_BIND_N_PARAMS(i_,T) >
492{
493};
494#else
495template<
496      typename F AUX778076_BIND_N_PARAMS(i_, typename T) AUX778076_DMC_PARAM()
497    >
498struct bind< F AUX778076_BIND_N_SPEC_PARAMS(i_, T, na) >
499    : BOOST_PP_CAT(bind,i_)<F AUX778076_BIND_N_PARAMS(i_,T) >
500{
501};
502#endif
503
504#   else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
505
506namespace aux {
507
508template<>
509struct bind_chooser<i_>
510{
511    template<
512          typename F, AUX778076_BIND_PARAMS(typename T)
513        >
514    struct result_
515    {
516        typedef BOOST_PP_CAT(bind,i_)< F AUX778076_BIND_N_PARAMS(i_,T) > type;
517    };
518};
519
520} // namespace aux
521
522#   endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
523#   endif // BOOST_MPL_CFG_NO_BIND_TEMPLATE
524
525#endif // AUX778076_SPEC_NAME
526
527#   undef i_
528
529///// iteration, depth == 2
530
531#elif BOOST_PP_ITERATION_DEPTH() == 2
532
533#   define j_ BOOST_PP_FRAME_ITERATION(2)
534#   if !defined(BOOST_MPL_CFG_NO_UNNAMED_PLACEHOLDER_SUPPORT)
535
536        typedef aux::replace_unnamed_arg< BOOST_PP_CAT(T,j_),BOOST_PP_CAT(n,j_) > BOOST_PP_CAT(r,j_);
537        typedef typename BOOST_PP_CAT(r,j_)::type BOOST_PP_CAT(a,j_);
538        typedef typename BOOST_PP_CAT(r,j_)::next BOOST_PP_CAT(n,BOOST_PP_INC(j_));
539        typedef aux::resolve_bind_arg<BOOST_PP_CAT(a,j_), AUX778076_BIND_PARAMS(U)> BOOST_PP_CAT(t,j_);
540        ///
541#   else
542        typedef aux::resolve_bind_arg< BOOST_PP_CAT(T,j_),AUX778076_BIND_PARAMS(U)> BOOST_PP_CAT(t,j_);
543
544#   endif
545#   undef j_
546
547#endif // BOOST_PP_IS_ITERATING
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