1// Boost Lambda Library lambda_functor_base.hpp -----------------------------
2//
3// Copyright (C) 1999, 2000 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi)
4//
5// Distributed under the Boost Software License, Version 1.0. (See
6// accompanying file LICENSE_1_0.txt or copy at
7// http://www.boost.org/LICENSE_1_0.txt)
8//
9// For more information, see www.boost.org
10
11// ------------------------------------------------------------
12
13#ifndef BOOST_LAMBDA_LAMBDA_FUNCTOR_BASE_HPP
14#define BOOST_LAMBDA_LAMBDA_FUNCTOR_BASE_HPP
15
16#include "boost/type_traits/add_reference.hpp"
17#include "boost/type_traits/add_const.hpp"
18#include "boost/type_traits/remove_const.hpp"
19#include "boost/lambda/detail/lambda_fwd.hpp"
20#include "boost/lambda/detail/lambda_traits.hpp"
21
22namespace boost {
23namespace lambda {
24
25#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
26#pragma warning(push)
27#pragma warning(disable:4512) //assignment operator could not be generated
28#endif
29
30 // for return type deductions we wrap bound argument to this class,
31 // which fulfils the base class contract for lambda_functors
32template <class T>
33class identity {
34
35 T elem;
36public:
37
38 typedef T element_t;
39
40 // take all parameters as const references. Note that non-const references
41 // stay as they are.
42 typedef typename boost::add_reference<
43 typename boost::add_const<T>::type
44 >::type par_t;
45
46 explicit identity(par_t t) : elem(t) {}
47
48 template <typename SigArgs>
49 struct sig { typedef typename boost::remove_const<element_t>::type type; };
50
51 template<class RET, CALL_TEMPLATE_ARGS>
52 RET call(CALL_FORMAL_ARGS) const { CALL_USE_ARGS; return elem; }
53};
54
55#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
56#pragma warning(pop)
57#endif
58
59template <class T>
60inline lambda_functor<identity<T&> > var(T& t) { return identity<T&>(t); }
61
62 // for lambda functors, var is an identity operator. It was forbidden
63 // at some point, but we might want to var something that can be a
64 // non-lambda functor or a lambda functor.
65template <class T>
66lambda_functor<T> var(const lambda_functor<T>& t) { return t; }
67
68template <class T> struct var_type {
69 typedef lambda_functor<identity<T&> > type;
70};
71
72
73template <class T>
74inline
75lambda_functor<identity<typename bound_argument_conversion<const T>::type> >
76constant(const T& t) {
77 return identity<typename bound_argument_conversion<const T>::type>(t);
78}
79template <class T>
80lambda_functor<T> constant(const lambda_functor<T>& t) { return t; }
81
82template <class T> struct constant_type {
83 typedef
84 lambda_functor<
85 identity<typename bound_argument_conversion<const T>::type>
86 > type;
87};
88
89
90
91template <class T>
92inline lambda_functor<identity<const T&> > constant_ref(const T& t) {
93 return identity<const T&>(t);
94}
95template <class T>
96lambda_functor<T> constant_ref(const lambda_functor<T>& t) { return t; }
97
98template <class T> struct constant_ref_type {
99 typedef
100 lambda_functor<identity<const T&> > type;
101};
102
103
104
105 // as_lambda_functor turns any types to lambda functors
106 // non-lambda_functors will be bound argument types
107template <class T>
108struct as_lambda_functor {
109 typedef typename
110 detail::remove_reference_and_cv<T>::type plain_T;
111 typedef typename
112 detail::IF<is_lambda_functor<plain_T>::value,
113 plain_T,
114 lambda_functor<
115 identity<typename bound_argument_conversion<T>::type>
116 >
117 >::RET type;
118};
119
120// turns arbitrary objects into lambda functors
121template <class T>
122inline
123lambda_functor<identity<typename bound_argument_conversion<const T>::type> >
124to_lambda_functor(const T& t) {
125 return identity<typename bound_argument_conversion<const T>::type>(t);
126}
127
128template <class T>
129inline lambda_functor<T>
130to_lambda_functor(const lambda_functor<T>& t) {
131 return t;
132}
133
134namespace detail {
135
136
137
138// In a call constify_rvals<T>::go(x)
139// x should be of type T. If T is a non-reference type, do
140// returns x as const reference.
141// Otherwise the type doesn't change.
142// The purpose of this class is to avoid
143// 'cannot bind temporaries to non-const references' errors.
144template <class T> struct constify_rvals {
145 template<class U>
146 static inline const U& go(const U& u) { return u; }
147};
148
149template <class T> struct constify_rvals<T&> {
150 template<class U>
151 static inline U& go(U& u) { return u; }
152};
153
154 // check whether one of the elements of a tuple (cons list) is of type
155 // null_type. Needed, because the compiler goes ahead and instantiates
156 // sig template for nullary case even if the nullary operator() is not
157 // called
158template <class T> struct is_null_type
159{ BOOST_STATIC_CONSTANT(bool, value = false); };
160
161template <> struct is_null_type<null_type>
162{ BOOST_STATIC_CONSTANT(bool, value = true); };
163
164template<class Tuple> struct has_null_type {
165 BOOST_STATIC_CONSTANT(bool, value = (is_null_type<typename Tuple::head_type>::value || has_null_type<typename Tuple::tail_type>::value));
166};
167template<> struct has_null_type<null_type> {
168 BOOST_STATIC_CONSTANT(bool, value = false);
169};
170
171
172// helpers -------------------
173
174
175template<class Args, class SigArgs>
176class deduce_argument_types_ {
177 typedef typename as_lambda_functor<typename Args::head_type>::type lf_t;
178 typedef typename lf_t::inherited::template sig<SigArgs>::type el_t;
179public:
180 typedef
181 boost::tuples::cons<
182 el_t,
183 typename deduce_argument_types_<typename Args::tail_type, SigArgs>::type
184 > type;
185};
186
187template<class SigArgs>
188class deduce_argument_types_<null_type, SigArgs> {
189public:
190 typedef null_type type;
191};
192
193
194// // note that tuples cannot have plain function types as elements.
195// // Hence, all other types will be non-const, except references to
196// // functions.
197// template <class T> struct remove_reference_except_from_functions {
198// typedef typename boost::remove_reference<T>::type t;
199// typedef typename detail::IF<boost::is_function<t>::value, T, t>::RET type;
200// };
201
202template<class Args, class SigArgs>
203class deduce_non_ref_argument_types_ {
204 typedef typename as_lambda_functor<typename Args::head_type>::type lf_t;
205 typedef typename lf_t::inherited::template sig<SigArgs>::type el_t;
206public:
207 typedef
208 boost::tuples::cons<
209 // typename detail::remove_reference_except_from_functions<el_t>::type,
210 typename boost::remove_reference<el_t>::type,
211 typename deduce_non_ref_argument_types_<typename Args::tail_type, SigArgs>::type
212 > type;
213};
214
215template<class SigArgs>
216class deduce_non_ref_argument_types_<null_type, SigArgs> {
217public:
218 typedef null_type type;
219};
220
221 // -------------
222
223// take stored Args and Open Args, and return a const list with
224// deduced elements (real return types)
225template<class Args, class SigArgs>
226class deduce_argument_types {
227 typedef typename deduce_argument_types_<Args, SigArgs>::type t1;
228public:
229 typedef typename detail::IF<
230 has_null_type<t1>::value, null_type, t1
231 >::RET type;
232};
233
234// take stored Args and Open Args, and return a const list with
235// deduced elements (references are stripped from the element types)
236
237template<class Args, class SigArgs>
238class deduce_non_ref_argument_types {
239 typedef typename deduce_non_ref_argument_types_<Args, SigArgs>::type t1;
240public:
241 typedef typename detail::IF<
242 has_null_type<t1>::value, null_type, t1
243 >::RET type;
244};
245
246template <int N, class Args, class SigArgs>
247struct nth_return_type_sig {
248 typedef typename
249 as_lambda_functor<
250 typename boost::tuples::element<N, Args>::type
251 // typename tuple_element_as_reference<N, Args>::type
252 >::type lf_type;
253
254 typedef typename lf_type::inherited::template sig<SigArgs>::type type;
255};
256
257template<int N, class Tuple> struct element_or_null {
258 typedef typename boost::tuples::element<N, Tuple>::type type;
259};
260
261template<int N> struct element_or_null<N, null_type> {
262 typedef null_type type;
263};
264
265
266
267
268} // end detail
269
270 // -- lambda_functor base ---------------------
271
272// the explicit_return_type_action case -----------------------------------
273template<class RET, class Args>
274class lambda_functor_base<explicit_return_type_action<RET>, Args>
275{
276public:
277 Args args;
278
279 typedef RET result_type;
280
281 explicit lambda_functor_base(const Args& a) : args(a) {}
282
283 template <class SigArgs> struct sig { typedef RET type; };
284
285 template<class RET_, CALL_TEMPLATE_ARGS>
286 RET call(CALL_FORMAL_ARGS) const
287 {
288 return detail::constify_rvals<RET>::go(
289 detail::r_select<RET>::go(boost::tuples::get<0>(args), CALL_ACTUAL_ARGS));
290 }
291};
292
293// the protect_action case -----------------------------------
294template<class Args>
295class lambda_functor_base<protect_action, Args>
296{
297public:
298 Args args;
299public:
300
301 explicit lambda_functor_base(const Args& a) : args(a) {}
302
303
304 template<class RET, CALL_TEMPLATE_ARGS>
305 RET call(CALL_FORMAL_ARGS) const
306 {
307 CALL_USE_ARGS;
308 return boost::tuples::get<0>(args);
309 }
310
311 template<class SigArgs> struct sig {
312 // typedef typename detail::tuple_element_as_reference<0, SigArgs>::type type;
313 typedef typename boost::tuples::element<0, Args>::type type;
314 };
315};
316
317// Do nothing --------------------------------------------------------
318class do_nothing_action {};
319
320template<class Args>
321class lambda_functor_base<do_nothing_action, Args> {
322 // Args args;
323public:
324 // explicit lambda_functor_base(const Args& a) {}
325 lambda_functor_base() {}
326
327
328 template<class RET, CALL_TEMPLATE_ARGS> RET call(CALL_FORMAL_ARGS) const {
329 return CALL_USE_ARGS;
330 }
331
332 template<class SigArgs> struct sig { typedef void type; };
333};
334
335
336// These specializations provide a shorter notation to define actions.
337// These lambda_functor_base instances take care of the recursive evaluation
338// of the arguments and pass the evaluated arguments to the apply function
339// of an action class. To make action X work with these classes, one must
340// instantiate the lambda_functor_base as:
341// lambda_functor_base<action<ARITY, X>, Args>
342// Where ARITY is the arity of the apply function in X
343
344// The return type is queried as:
345// return_type_N<X, EvaluatedArgumentTypes>::type
346// for which there must be a specialization.
347
348// Function actions, casts, throws,... all go via these classes.
349
350
351template<class Act, class Args>
352class lambda_functor_base<action<0, Act>, Args>
353{
354public:
355// Args args; not needed
356 explicit lambda_functor_base(const Args& /*a*/) {}
357
358 template<class SigArgs> struct sig {
359 typedef typename return_type_N<Act, null_type>::type type;
360 };
361
362 template<class RET, CALL_TEMPLATE_ARGS>
363 RET call(CALL_FORMAL_ARGS) const {
364 CALL_USE_ARGS;
365 return Act::template apply<RET>();
366 }
367};
368
369
370#if defined BOOST_LAMBDA_LAMBDA_FUNCTOR_BASE_FIRST_PART
371#error "Multiple defines of BOOST_LAMBDA_LAMBDA_FUNCTOR_BASE_FIRST_PART"
372#endif
373
374
375#define BOOST_LAMBDA_LAMBDA_FUNCTOR_BASE_FIRST_PART(ARITY) \
376template<class Act, class Args> \
377class lambda_functor_base<action<ARITY, Act>, Args> \
378{ \
379public: \
380 Args args; \
381 \
382 explicit lambda_functor_base(const Args& a) : args(a) {} \
383 \
384 template<class SigArgs> struct sig { \
385 typedef typename \
386 detail::deduce_argument_types<Args, SigArgs>::type rets_t; \
387 public: \
388 typedef typename \
389 return_type_N_prot<Act, rets_t>::type type; \
390 }; \
391 \
392 \
393 template<class RET, CALL_TEMPLATE_ARGS> \
394 RET call(CALL_FORMAL_ARGS) const { \
395 using boost::tuples::get; \
396 using detail::constify_rvals; \
397 using detail::r_select; \
398 using detail::element_or_null; \
399 using detail::deduce_argument_types;
400
401BOOST_LAMBDA_LAMBDA_FUNCTOR_BASE_FIRST_PART(1)
402
403 typedef typename
404 deduce_argument_types<Args, tuple<CALL_REFERENCE_TYPES> >::type rets_t;
405 typedef typename element_or_null<0, rets_t>::type rt0;
406
407 return Act::template apply<RET>(
408 constify_rvals<rt0>::go(r_select<rt0>::go(get<0>(args), CALL_ACTUAL_ARGS))
409 );
410 }
411};
412
413
414BOOST_LAMBDA_LAMBDA_FUNCTOR_BASE_FIRST_PART(2)
415
416 typedef typename
417 deduce_argument_types<Args, tuple<CALL_REFERENCE_TYPES> >::type rets_t;
418 typedef typename element_or_null<0, rets_t>::type rt0;
419 typedef typename element_or_null<1, rets_t>::type rt1;
420
421 return Act::template apply<RET>(
422 constify_rvals<rt0>::go(r_select<rt0>::go(get<0>(args), CALL_ACTUAL_ARGS)),
423 constify_rvals<rt1>::go(r_select<rt1>::go(get<1>(args), CALL_ACTUAL_ARGS))
424 );
425 }
426};
427
428BOOST_LAMBDA_LAMBDA_FUNCTOR_BASE_FIRST_PART(3)
429
430 typedef typename
431 deduce_argument_types<Args, tuple<CALL_REFERENCE_TYPES> >::type rets_t;
432
433 typedef typename element_or_null<0, rets_t>::type rt0;
434 typedef typename element_or_null<1, rets_t>::type rt1;
435 typedef typename element_or_null<2, rets_t>::type rt2;
436
437 return Act::template apply<RET>(
438 constify_rvals<rt0>::go(r_select<rt0>::go(get<0>(args), CALL_ACTUAL_ARGS)),
439 constify_rvals<rt1>::go(r_select<rt1>::go(get<1>(args), CALL_ACTUAL_ARGS)),
440 constify_rvals<rt2>::go(r_select<rt2>::go(get<2>(args), CALL_ACTUAL_ARGS))
441 );
442 }
443};
444
445BOOST_LAMBDA_LAMBDA_FUNCTOR_BASE_FIRST_PART(4)
446 typedef typename
447 deduce_argument_types<Args, tuple<CALL_REFERENCE_TYPES> >::type rets_t;
448 typedef typename element_or_null<0, rets_t>::type rt0;
449 typedef typename element_or_null<1, rets_t>::type rt1;
450 typedef typename element_or_null<2, rets_t>::type rt2;
451 typedef typename element_or_null<3, rets_t>::type rt3;
452
453 return Act::template apply<RET>(
454 constify_rvals<rt0>::go(r_select<rt0>::go(get<0>(args), CALL_ACTUAL_ARGS)),
455 constify_rvals<rt1>::go(r_select<rt1>::go(get<1>(args), CALL_ACTUAL_ARGS)),
456 constify_rvals<rt2>::go(r_select<rt2>::go(get<2>(args), CALL_ACTUAL_ARGS)),
457 constify_rvals<rt3>::go(r_select<rt3>::go(get<3>(args), CALL_ACTUAL_ARGS))
458 );
459 }
460};
461
462BOOST_LAMBDA_LAMBDA_FUNCTOR_BASE_FIRST_PART(5)
463 typedef typename
464 deduce_argument_types<Args, tuple<CALL_REFERENCE_TYPES> >::type rets_t;
465 typedef typename element_or_null<0, rets_t>::type rt0;
466 typedef typename element_or_null<1, rets_t>::type rt1;
467 typedef typename element_or_null<2, rets_t>::type rt2;
468 typedef typename element_or_null<3, rets_t>::type rt3;
469 typedef typename element_or_null<4, rets_t>::type rt4;
470
471 return Act::template apply<RET>(
472 constify_rvals<rt0>::go(r_select<rt0>::go(get<0>(args), CALL_ACTUAL_ARGS)),
473 constify_rvals<rt1>::go(r_select<rt1>::go(get<1>(args), CALL_ACTUAL_ARGS)),
474 constify_rvals<rt2>::go(r_select<rt2>::go(get<2>(args), CALL_ACTUAL_ARGS)),
475 constify_rvals<rt3>::go(r_select<rt3>::go(get<3>(args), CALL_ACTUAL_ARGS)),
476 constify_rvals<rt4>::go(r_select<rt4>::go(get<4>(args), CALL_ACTUAL_ARGS))
477 );
478 }
479};
480
481BOOST_LAMBDA_LAMBDA_FUNCTOR_BASE_FIRST_PART(6)
482
483 typedef typename
484 deduce_argument_types<Args, tuple<CALL_REFERENCE_TYPES> >::type rets_t;
485 typedef typename element_or_null<0, rets_t>::type rt0;
486 typedef typename element_or_null<1, rets_t>::type rt1;
487 typedef typename element_or_null<2, rets_t>::type rt2;
488 typedef typename element_or_null<3, rets_t>::type rt3;
489 typedef typename element_or_null<4, rets_t>::type rt4;
490 typedef typename element_or_null<5, rets_t>::type rt5;
491
492
493 return Act::template apply<RET>(
494 constify_rvals<rt0>::go(r_select<rt0>::go(get<0>(args), CALL_ACTUAL_ARGS)),
495 constify_rvals<rt1>::go(r_select<rt1>::go(get<1>(args), CALL_ACTUAL_ARGS)),
496 constify_rvals<rt2>::go(r_select<rt2>::go(get<2>(args), CALL_ACTUAL_ARGS)),
497 constify_rvals<rt3>::go(r_select<rt3>::go(get<3>(args), CALL_ACTUAL_ARGS)),
498 constify_rvals<rt4>::go(r_select<rt4>::go(get<4>(args), CALL_ACTUAL_ARGS)),
499 constify_rvals<rt5>::go(r_select<rt5>::go(get<5>(args), CALL_ACTUAL_ARGS))
500 );
501 }
502};
503
504BOOST_LAMBDA_LAMBDA_FUNCTOR_BASE_FIRST_PART(7)
505 typedef typename
506 deduce_argument_types<Args, tuple<CALL_REFERENCE_TYPES> >::type rets_t;
507 typedef typename element_or_null<0, rets_t>::type rt0;
508 typedef typename element_or_null<1, rets_t>::type rt1;
509 typedef typename element_or_null<2, rets_t>::type rt2;
510 typedef typename element_or_null<3, rets_t>::type rt3;
511 typedef typename element_or_null<4, rets_t>::type rt4;
512 typedef typename element_or_null<5, rets_t>::type rt5;
513 typedef typename element_or_null<6, rets_t>::type rt6;
514
515
516 return Act::template apply<RET>(
517 constify_rvals<rt0>::go(r_select<rt0>::go(get<0>(args), CALL_ACTUAL_ARGS)),
518 constify_rvals<rt1>::go(r_select<rt1>::go(get<1>(args), CALL_ACTUAL_ARGS)),
519 constify_rvals<rt2>::go(r_select<rt2>::go(get<2>(args), CALL_ACTUAL_ARGS)),
520 constify_rvals<rt3>::go(r_select<rt3>::go(get<3>(args), CALL_ACTUAL_ARGS)),
521 constify_rvals<rt4>::go(r_select<rt4>::go(get<4>(args), CALL_ACTUAL_ARGS)),
522 constify_rvals<rt5>::go(r_select<rt5>::go(get<5>(args), CALL_ACTUAL_ARGS)),
523 constify_rvals<rt6>::go(r_select<rt6>::go(get<6>(args), CALL_ACTUAL_ARGS))
524 );
525 }
526};
527
528BOOST_LAMBDA_LAMBDA_FUNCTOR_BASE_FIRST_PART(8)
529 typedef typename
530 deduce_argument_types<Args, tuple<CALL_REFERENCE_TYPES> >::type rets_t;
531 typedef typename element_or_null<0, rets_t>::type rt0;
532 typedef typename element_or_null<1, rets_t>::type rt1;
533 typedef typename element_or_null<2, rets_t>::type rt2;
534 typedef typename element_or_null<3, rets_t>::type rt3;
535 typedef typename element_or_null<4, rets_t>::type rt4;
536 typedef typename element_or_null<5, rets_t>::type rt5;
537 typedef typename element_or_null<6, rets_t>::type rt6;
538 typedef typename element_or_null<7, rets_t>::type rt7;
539
540 return Act::template apply<RET>(
541 constify_rvals<rt0>::go(r_select<rt0>::go(get<0>(args), CALL_ACTUAL_ARGS)),
542 constify_rvals<rt1>::go(r_select<rt1>::go(get<1>(args), CALL_ACTUAL_ARGS)),
543 constify_rvals<rt2>::go(r_select<rt2>::go(get<2>(args), CALL_ACTUAL_ARGS)),
544 constify_rvals<rt3>::go(r_select<rt3>::go(get<3>(args), CALL_ACTUAL_ARGS)),
545 constify_rvals<rt4>::go(r_select<rt4>::go(get<4>(args), CALL_ACTUAL_ARGS)),
546 constify_rvals<rt5>::go(r_select<rt5>::go(get<5>(args), CALL_ACTUAL_ARGS)),
547 constify_rvals<rt6>::go(r_select<rt6>::go(get<6>(args), CALL_ACTUAL_ARGS)),
548 constify_rvals<rt7>::go(r_select<rt7>::go(get<7>(args), CALL_ACTUAL_ARGS))
549 );
550 }
551};
552
553BOOST_LAMBDA_LAMBDA_FUNCTOR_BASE_FIRST_PART(9)
554 typedef typename
555 deduce_argument_types<Args, tuple<CALL_REFERENCE_TYPES> >::type rets_t;
556 typedef typename element_or_null<0, rets_t>::type rt0;
557 typedef typename element_or_null<1, rets_t>::type rt1;
558 typedef typename element_or_null<2, rets_t>::type rt2;
559 typedef typename element_or_null<3, rets_t>::type rt3;
560 typedef typename element_or_null<4, rets_t>::type rt4;
561 typedef typename element_or_null<5, rets_t>::type rt5;
562 typedef typename element_or_null<6, rets_t>::type rt6;
563 typedef typename element_or_null<7, rets_t>::type rt7;
564 typedef typename element_or_null<8, rets_t>::type rt8;
565
566 return Act::template apply<RET>(
567 constify_rvals<rt0>::go(r_select<rt0>::go(get<0>(args), CALL_ACTUAL_ARGS)),
568 constify_rvals<rt1>::go(r_select<rt1>::go(get<1>(args), CALL_ACTUAL_ARGS)),
569 constify_rvals<rt2>::go(r_select<rt2>::go(get<2>(args), CALL_ACTUAL_ARGS)),
570 constify_rvals<rt3>::go(r_select<rt3>::go(get<3>(args), CALL_ACTUAL_ARGS)),
571 constify_rvals<rt4>::go(r_select<rt4>::go(get<4>(args), CALL_ACTUAL_ARGS)),
572 constify_rvals<rt5>::go(r_select<rt5>::go(get<5>(args), CALL_ACTUAL_ARGS)),
573 constify_rvals<rt6>::go(r_select<rt6>::go(get<6>(args), CALL_ACTUAL_ARGS)),
574 constify_rvals<rt7>::go(r_select<rt7>::go(get<7>(args), CALL_ACTUAL_ARGS)),
575 constify_rvals<rt8>::go(r_select<rt8>::go(get<8>(args), CALL_ACTUAL_ARGS))
576 );
577 }
578};
579
580BOOST_LAMBDA_LAMBDA_FUNCTOR_BASE_FIRST_PART(10)
581 typedef typename
582 deduce_argument_types<Args, tuple<CALL_REFERENCE_TYPES> >::type rets_t;
583 typedef typename element_or_null<0, rets_t>::type rt0;
584 typedef typename element_or_null<1, rets_t>::type rt1;
585 typedef typename element_or_null<2, rets_t>::type rt2;
586 typedef typename element_or_null<3, rets_t>::type rt3;
587 typedef typename element_or_null<4, rets_t>::type rt4;
588 typedef typename element_or_null<5, rets_t>::type rt5;
589 typedef typename element_or_null<6, rets_t>::type rt6;
590 typedef typename element_or_null<7, rets_t>::type rt7;
591 typedef typename element_or_null<8, rets_t>::type rt8;
592 typedef typename element_or_null<9, rets_t>::type rt9;
593
594 return Act::template apply<RET>(
595 constify_rvals<rt0>::go(r_select<rt0>::go(get<0>(args), CALL_ACTUAL_ARGS)),
596 constify_rvals<rt1>::go(r_select<rt1>::go(get<1>(args), CALL_ACTUAL_ARGS)),
597 constify_rvals<rt2>::go(r_select<rt2>::go(get<2>(args), CALL_ACTUAL_ARGS)),
598 constify_rvals<rt3>::go(r_select<rt3>::go(get<3>(args), CALL_ACTUAL_ARGS)),
599 constify_rvals<rt4>::go(r_select<rt4>::go(get<4>(args), CALL_ACTUAL_ARGS)),
600 constify_rvals<rt5>::go(r_select<rt5>::go(get<5>(args), CALL_ACTUAL_ARGS)),
601 constify_rvals<rt6>::go(r_select<rt6>::go(get<6>(args), CALL_ACTUAL_ARGS)),
602 constify_rvals<rt7>::go(r_select<rt7>::go(get<7>(args), CALL_ACTUAL_ARGS)),
603 constify_rvals<rt8>::go(r_select<rt8>::go(get<8>(args), CALL_ACTUAL_ARGS)),
604 constify_rvals<rt9>::go(r_select<rt9>::go(get<9>(args), CALL_ACTUAL_ARGS))
605 );
606 }
607};
608
609#undef BOOST_LAMBDA_LAMBDA_FUNCTOR_BASE_FIRST_PART
610
611
612} // namespace lambda
613} // namespace boost
614
615#endif
616