Fix weird ctor invocation syntax.
[ginac.git] / ginac / function.pl
1 #  This perl script automatically generates function.h and function.cpp
2
3 #  function.pl options: \$maxargs=${maxargs}
4
5 #  GiNaC Copyright (C) 1999-2010 Johannes Gutenberg University Mainz, Germany
6
7 #  This program is free software; you can redistribute it and/or modify
8 #  it under the terms of the GNU General Public License as published by
9 #  the Free Software Foundation; either version 2 of the License, or
10 #  (at your option) any later version.
11
12 #  This program is distributed in the hope that it will be useful,
13 #  but WITHOUT ANY WARRANTY; without even the implied warranty of
14 #  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 #  GNU General Public License for more details.
16
17 #  You should have received a copy of the GNU General Public License
18 #  along with this program; if not, write to the Free Software
19 #  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
20
21 $maxargs=14;
22
23 sub generate_seq {
24         my ($seq_template,$n)=@_;
25         my ($res,$N);
26         
27         $res='';
28         for ($N=1; $N<=$n; $N++) {
29                 $res .= eval('"' . $seq_template . '"');
30                 if ($N!=$n) {
31                         $res .= ', ';
32                 }
33         }
34         return $res;
35 }
36
37 sub generate_from_to {
38         my ($template,$seq_template1,$seq_template2,$seq_template3,$from,$to)=@_;
39         my ($res,$N,$SEQ);
40
41         $res='';
42         for ($N=$from; $N<=$to; $N++) {
43                 $SEQ1=generate_seq($seq_template1,$N);
44                 $SEQ2=generate_seq($seq_template2,$N);
45                 $SEQ3=generate_seq($seq_template3,$N);
46                 $res .= eval('"' . $template . '"');
47                 $SEQ1=''; # to avoid main::SEQ1 used only once warning
48                 $SEQ2=''; # same as above
49                 $SEQ3=''; # same as above
50         }
51         return $res;
52 }
53
54 sub generate {
55         my ($template,$seq_template1,$seq_template2,$seq_template3)=@_;
56         return generate_from_to($template,$seq_template1,$seq_template2,$seq_template3,1,$maxargs);
57 }
58
59 $declare_function_macro = generate(
60         <<'END_OF_DECLARE_FUNCTION_MACRO','typename T${N}','const T${N} & p${N}','GiNaC::ex(p${N})');
61 #define DECLARE_FUNCTION_${N}P(NAME) \\
62 class NAME##_SERIAL { public: static unsigned serial; }; \\
63 const unsigned NAME##_NPARAMS = ${N}; \\
64 template<${SEQ1}> const GiNaC::function NAME(${SEQ2}) { \\
65         return GiNaC::function(NAME##_SERIAL::serial, ${SEQ3}); \\
66 }
67
68 END_OF_DECLARE_FUNCTION_MACRO
69
70 $typedef_eval_funcp=generate(
71 'typedef ex (* eval_funcp_${N})(${SEQ1});'."\n",
72 'const ex &','','');
73
74 $typedef_evalf_funcp=generate(
75 'typedef ex (* evalf_funcp_${N})(${SEQ1});'."\n",
76 'const ex &','','');
77
78 $typedef_conjugate_funcp=generate(
79 'typedef ex (* conjugate_funcp_${N})(${SEQ1});'."\n",
80 'const ex &','','');
81
82 $typedef_real_part_funcp=generate(
83 'typedef ex (* real_part_funcp_${N})(${SEQ1});'."\n",
84 'const ex &','','');
85
86 $typedef_imag_part_funcp=generate(
87 'typedef ex (* imag_part_funcp_${N})(${SEQ1});'."\n",
88 'const ex &','','');
89
90 $typedef_derivative_funcp=generate(
91 'typedef ex (* derivative_funcp_${N})(${SEQ1}, unsigned);'."\n",
92 'const ex &','','');
93
94 $typedef_power_funcp=generate(
95 'typedef ex (* power_funcp_${N})(${SEQ1}, const ex &);'."\n",
96 'const ex &','','');
97
98 $typedef_series_funcp=generate(
99 'typedef ex (* series_funcp_${N})(${SEQ1}, const relational &, int, unsigned);'."\n",
100 'const ex &','','');
101
102 $typedef_print_funcp=generate(
103 'typedef void (* print_funcp_${N})(${SEQ1}, const print_context &);'."\n",
104 'const ex &','','');
105
106 $eval_func_interface=generate('    function_options & eval_func(eval_funcp_${N} e);'."\n",'','','');
107
108 $evalf_func_interface=generate('    function_options & evalf_func(evalf_funcp_${N} ef);'."\n",'','','');
109
110 $conjugate_func_interface=generate('    function_options & conjugate_func(conjugate_funcp_${N} d);'."\n",'','','');
111
112 $real_part_func_interface=generate('    function_options & real_part_func(real_part_funcp_${N} d);'."\n",'','','');
113
114 $imag_part_func_interface=generate('    function_options & imag_part_func(imag_part_funcp_${N} d);'."\n",'','','');
115
116 $derivative_func_interface=generate('    function_options & derivative_func(derivative_funcp_${N} d);'."\n",'','','');
117
118 $power_func_interface=generate('    function_options & power_func(power_funcp_${N} d);'."\n",'','','');
119
120 $series_func_interface=generate('    function_options & series_func(series_funcp_${N} s);'."\n",'','','');
121
122 $print_func_interface=generate(
123         <<'END_OF_PRINT_FUNC_INTERFACE','','','');
124     template <class Ctx> function_options & print_func(print_funcp_${N} p)
125     {
126         test_and_set_nparams(${N});
127         set_print_func(Ctx::get_class_info_static().options.get_id(), print_funcp(p));
128         return *this;
129     }
130 END_OF_PRINT_FUNC_INTERFACE
131
132 $constructors_interface=generate(
133 '    function(unsigned ser, ${SEQ1});'."\n",
134 'const ex & param${N}','','');
135
136 $constructors_implementation=generate(
137         <<'END_OF_CONSTRUCTORS_IMPLEMENTATION','const ex & param${N}','param${N}','');
138 function::function(unsigned ser, ${SEQ1})
139         : exprseq(${SEQ2}), serial(ser)
140 {
141 }
142 END_OF_CONSTRUCTORS_IMPLEMENTATION
143
144 $eval_switch_statement=generate(
145         <<'END_OF_EVAL_SWITCH_STATEMENT','seq[${N}-1]','','');
146         case ${N}:
147                 eval_result = ((eval_funcp_${N})(opt.eval_f))(${SEQ1});
148                 break;
149 END_OF_EVAL_SWITCH_STATEMENT
150
151 $evalf_switch_statement=generate(
152         <<'END_OF_EVALF_SWITCH_STATEMENT','eseq[${N}-1]','','');
153         case ${N}:
154                 return ((evalf_funcp_${N})(opt.evalf_f))(${SEQ1});
155 END_OF_EVALF_SWITCH_STATEMENT
156
157 $conjugate_switch_statement=generate(
158         <<'END_OF_DIFF_SWITCH_STATEMENT','seq[${N}-1]','','');
159         case ${N}:
160                 return ((conjugate_funcp_${N})(opt.conjugate_f))(${SEQ1});
161 END_OF_DIFF_SWITCH_STATEMENT
162
163 $real_part_switch_statement=generate(
164         <<'END_OF_DIFF_SWITCH_STATEMENT','seq[${N}-1]','','');
165         case ${N}:
166                 return ((real_part_funcp_${N})(opt.real_part_f))(${SEQ1});
167 END_OF_DIFF_SWITCH_STATEMENT
168
169 $imag_part_switch_statement=generate(
170         <<'END_OF_DIFF_SWITCH_STATEMENT','seq[${N}-1]','','');
171         case ${N}:
172                 return ((imag_part_funcp_${N})(opt.imag_part_f))(${SEQ1});
173 END_OF_DIFF_SWITCH_STATEMENT
174
175 $diff_switch_statement=generate(
176         <<'END_OF_DIFF_SWITCH_STATEMENT','seq[${N}-1]','','');
177         case ${N}:
178                 return ((derivative_funcp_${N})(opt.derivative_f))(${SEQ1},diff_param);
179 END_OF_DIFF_SWITCH_STATEMENT
180
181 $power_switch_statement=generate(
182         <<'END_OF_POWER_SWITCH_STATEMENT','seq[${N}-1]','','');
183         case ${N}:
184                 return ((power_funcp_${N})(opt.power_f))(${SEQ1},power_param);
185 END_OF_POWER_SWITCH_STATEMENT
186
187 $series_switch_statement=generate(
188         <<'END_OF_SERIES_SWITCH_STATEMENT','seq[${N}-1]','','');
189         case ${N}:
190                 try {
191                         res = ((series_funcp_${N})(opt.series_f))(${SEQ1},r,order,options);
192                 } catch (do_taylor) {
193                         res = basic::series(r, order, options);
194                 }
195                 return res;
196 END_OF_SERIES_SWITCH_STATEMENT
197
198 $print_switch_statement=generate(
199         <<'END_OF_PRINT_SWITCH_STATEMENT','seq[${N}-1]','','');
200                 case ${N}:
201                         ((print_funcp_${N})(pdt[id]))(${SEQ1}, c);
202                         break;
203 END_OF_PRINT_SWITCH_STATEMENT
204
205 $eval_func_implementation=generate(
206         <<'END_OF_EVAL_FUNC_IMPLEMENTATION','','','');
207 function_options & function_options::eval_func(eval_funcp_${N} e)
208 {
209         test_and_set_nparams(${N});
210         eval_f = eval_funcp(e);
211         return *this;
212 }
213 END_OF_EVAL_FUNC_IMPLEMENTATION
214
215 $evalf_func_implementation=generate(
216         <<'END_OF_EVALF_FUNC_IMPLEMENTATION','','','');
217 function_options & function_options::evalf_func(evalf_funcp_${N} ef)
218 {
219         test_and_set_nparams(${N});
220         evalf_f = evalf_funcp(ef);
221         return *this;
222 }
223 END_OF_EVALF_FUNC_IMPLEMENTATION
224
225 $conjugate_func_implementation=generate(
226         <<'END_OF_CONJUGATE_FUNC_IMPLEMENTATION','','','');
227 function_options & function_options::conjugate_func(conjugate_funcp_${N} c)
228 {
229         test_and_set_nparams(${N});
230         conjugate_f = conjugate_funcp(c);
231         return *this;
232 }
233 END_OF_CONJUGATE_FUNC_IMPLEMENTATION
234
235 $real_part_func_implementation=generate(
236         <<'END_OF_REAL_PART_FUNC_IMPLEMENTATION','','','');
237 function_options & function_options::real_part_func(real_part_funcp_${N} c)
238 {
239         test_and_set_nparams(${N});
240         real_part_f = real_part_funcp(c);
241         return *this;
242 }
243 END_OF_REAL_PART_FUNC_IMPLEMENTATION
244
245 $imag_part_func_implementation=generate(
246         <<'END_OF_IMAG_PART_FUNC_IMPLEMENTATION','','','');
247 function_options & function_options::imag_part_func(imag_part_funcp_${N} c)
248 {
249         test_and_set_nparams(${N});
250         imag_part_f = imag_part_funcp(c);
251         return *this;
252 }
253 END_OF_IMAG_PART_FUNC_IMPLEMENTATION
254
255 $derivative_func_implementation=generate(
256         <<'END_OF_DERIVATIVE_FUNC_IMPLEMENTATION','','','');
257 function_options & function_options::derivative_func(derivative_funcp_${N} d)
258 {
259         test_and_set_nparams(${N});
260         derivative_f = derivative_funcp(d);
261         return *this;
262 }
263 END_OF_DERIVATIVE_FUNC_IMPLEMENTATION
264
265 $power_func_implementation=generate(
266         <<'END_OF_POWER_FUNC_IMPLEMENTATION','','','');
267 function_options & function_options::power_func(power_funcp_${N} d)
268 {
269         test_and_set_nparams(${N});
270         power_f = power_funcp(d);
271         return *this;
272 }
273 END_OF_POWER_FUNC_IMPLEMENTATION
274
275 $series_func_implementation=generate(
276         <<'END_OF_SERIES_FUNC_IMPLEMENTATION','','','');
277 function_options & function_options::series_func(series_funcp_${N} s)
278 {
279         test_and_set_nparams(${N});
280         series_f = series_funcp(s);
281         return *this;
282 }
283 END_OF_SERIES_FUNC_IMPLEMENTATION
284
285 $interface=<<END_OF_INTERFACE;
286 /** \@file function.h
287  *
288  *  Interface to class of symbolic functions. */
289
290 /*
291  *  This file was generated automatically by function.pl.
292  *  Please do not modify it directly, edit the perl script instead!
293  *  function.pl options: \$maxargs=${maxargs}
294  *
295  *  GiNaC Copyright (C) 1999-2010 Johannes Gutenberg University Mainz, Germany
296  *
297  *  This program is free software; you can redistribute it and/or modify
298  *  it under the terms of the GNU General Public License as published by
299  *  the Free Software Foundation; either version 2 of the License, or
300  *  (at your option) any later version.
301  *
302  *  This program is distributed in the hope that it will be useful,
303  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
304  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
305  *  GNU General Public License for more details.
306  *
307  *  You should have received a copy of the GNU General Public License
308  *  along with this program; if not, write to the Free Software
309  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
310  */
311
312 #ifndef GINAC_FUNCTION_H
313 #define GINAC_FUNCTION_H
314
315 #include "exprseq.h"
316
317 // CINT needs <algorithm> to work properly with <vector>
318 #include <algorithm>
319 #include <string>
320 #include <vector>
321
322 // the following lines have been generated for max. ${maxargs} parameters
323 $declare_function_macro
324 // end of generated lines
325
326 #define REGISTER_FUNCTION(NAME,OPT) \\
327 unsigned NAME##_SERIAL::serial = \\
328         GiNaC::function::register_new(GiNaC::function_options(#NAME, NAME##_NPARAMS).OPT);
329
330 namespace GiNaC {
331
332 class function;
333 class symmetry;
334
335 typedef ex (* eval_funcp)();
336 typedef ex (* evalf_funcp)();
337 typedef ex (* conjugate_funcp)();
338 typedef ex (* real_part_funcp)();
339 typedef ex (* imag_part_funcp)();
340 typedef ex (* derivative_funcp)();
341 typedef ex (* power_funcp)();
342 typedef ex (* series_funcp)();
343 typedef void (* print_funcp)();
344
345 // the following lines have been generated for max. ${maxargs} parameters
346 $typedef_eval_funcp
347 $typedef_evalf_funcp
348 $typedef_conjugate_funcp
349 $typedef_real_part_funcp
350 $typedef_imag_part_funcp
351 $typedef_derivative_funcp
352 $typedef_power_funcp
353 $typedef_series_funcp
354 $typedef_print_funcp
355 // end of generated lines
356
357 // Alternatively, an exvector may be passed into the static function, instead
358 // of individual ex objects.  Then, the number of arguments is not limited.
359 typedef ex (* eval_funcp_exvector)(const exvector &);
360 typedef ex (* evalf_funcp_exvector)(const exvector &);
361 typedef ex (* conjugate_funcp_exvector)(const exvector &);
362 typedef ex (* real_part_funcp_exvector)(const exvector &);
363 typedef ex (* imag_part_funcp_exvector)(const exvector &);
364 typedef ex (* derivative_funcp_exvector)(const exvector &, unsigned);
365 typedef ex (* power_funcp_exvector)(const exvector &, const ex &);
366 typedef ex (* series_funcp_exvector)(const exvector &, const relational &, int, unsigned);
367 typedef void (* print_funcp_exvector)(const exvector &, const print_context &);
368
369
370 class function_options
371 {
372         friend class function;
373         friend class fderivative;
374 public:
375         function_options();
376         function_options(std::string const & n, std::string const & tn=std::string());
377         function_options(std::string const & n, unsigned np);
378         ~function_options();
379         void initialize();
380
381         function_options & dummy() { return *this; }
382         function_options & set_name(std::string const & n, std::string const & tn=std::string());
383         function_options & latex_name(std::string const & tn);
384 // the following lines have been generated for max. ${maxargs} parameters
385 $eval_func_interface
386 $evalf_func_interface
387 $conjugate_func_interface
388 $real_part_func_interface
389 $imag_part_func_interface
390 $derivative_func_interface
391 $power_func_interface
392 $series_func_interface
393 $print_func_interface
394 // end of generated lines
395         function_options & eval_func(eval_funcp_exvector e);
396         function_options & evalf_func(evalf_funcp_exvector ef);
397         function_options & conjugate_func(conjugate_funcp_exvector d);
398         function_options & real_part_func(real_part_funcp_exvector d);
399         function_options & imag_part_func(imag_part_funcp_exvector d);
400         function_options & derivative_func(derivative_funcp_exvector d);
401         function_options & power_func(power_funcp_exvector d);
402         function_options & series_func(series_funcp_exvector s);
403
404         template <class Ctx> function_options & print_func(print_funcp_exvector p)
405         {
406                 print_use_exvector_args = true;
407                 set_print_func(Ctx::get_class_info_static().options.get_id(), print_funcp(p));
408                 return *this;
409         }
410
411         function_options & set_return_type(unsigned rt, const return_type_t* rtt = 0);
412         function_options & do_not_evalf_params();
413         function_options & remember(unsigned size, unsigned assoc_size=0,
414                                     unsigned strategy=remember_strategies::delete_never);
415         function_options & overloaded(unsigned o);
416         function_options & set_symmetry(const symmetry & s);
417
418         std::string get_name() const { return name; }
419         unsigned get_nparams() const { return nparams; }
420
421 protected:
422         bool has_derivative() const { return derivative_f != NULL; }
423         bool has_power() const { return power_f != NULL; }
424         void test_and_set_nparams(unsigned n);
425         void set_print_func(unsigned id, print_funcp f);
426
427         std::string name;
428         std::string TeX_name;
429
430         unsigned nparams;
431
432         eval_funcp eval_f;
433         evalf_funcp evalf_f;
434         conjugate_funcp conjugate_f;
435         real_part_funcp real_part_f;
436         imag_part_funcp imag_part_f;
437         derivative_funcp derivative_f;
438         power_funcp power_f;
439         series_funcp series_f;
440         std::vector<print_funcp> print_dispatch_table;
441
442         bool evalf_params_first;
443
444         bool use_return_type;
445         unsigned return_type;
446         return_type_t return_type_tinfo;
447
448         bool use_remember;
449         unsigned remember_size;
450         unsigned remember_assoc_size;
451         unsigned remember_strategy;
452
453         bool eval_use_exvector_args;
454         bool evalf_use_exvector_args;
455         bool conjugate_use_exvector_args;
456         bool real_part_use_exvector_args;
457         bool imag_part_use_exvector_args;
458         bool derivative_use_exvector_args;
459         bool power_use_exvector_args;
460         bool series_use_exvector_args;
461         bool print_use_exvector_args;
462
463         unsigned functions_with_same_name;
464
465         ex symtree;
466 };
467
468
469 /** Exception class thrown by classes which provide their own series expansion
470  *  to signal that ordinary Taylor expansion is safe. */
471 class do_taylor {};
472
473
474 /** The class function is used to implement builtin functions like sin, cos...
475         and user defined functions */
476 class function : public exprseq
477 {
478         GINAC_DECLARE_REGISTERED_CLASS(function, exprseq)
479
480         // CINT has a linking problem
481 #ifndef __MAKECINT__
482         friend void ginsh_get_ginac_functions();
483 #endif // def __MAKECINT__
484
485         friend class remember_table_entry;
486         // friend class remember_table_list;
487         // friend class remember_table;
488
489 // member functions
490
491         // other constructors
492 public:
493         function(unsigned ser);
494         // the following lines have been generated for max. ${maxargs} parameters
495 $constructors_interface
496         // end of generated lines
497         function(unsigned ser, const exprseq & es);
498         function(unsigned ser, const exvector & v, bool discardable = false);
499         function(unsigned ser, std::auto_ptr<exvector> vp);
500
501         // functions overriding virtual functions from base classes
502 public:
503         void print(const print_context & c, unsigned level = 0) const;
504         unsigned precedence() const {return 70;}
505         ex expand(unsigned options=0) const;
506         ex eval(int level=0) const;
507         ex evalf(int level=0) const;
508         ex eval_ncmul(const exvector & v) const;
509         unsigned calchash() const;
510         ex series(const relational & r, int order, unsigned options = 0) const;
511         ex thiscontainer(const exvector & v) const;
512         ex thiscontainer(std::auto_ptr<exvector> vp) const;
513         ex conjugate() const;
514         ex real_part() const;
515         ex imag_part() const;
516         void archive(archive_node& n) const;
517         void read_archive(const archive_node& n, lst& syms);
518 protected:
519         ex derivative(const symbol & s) const;
520         bool is_equal_same_type(const basic & other) const;
521         bool match_same_type(const basic & other) const;
522         unsigned return_type() const;
523         return_type_t return_type_tinfo() const;
524         
525         // new virtual functions which can be overridden by derived classes
526         // none
527         
528         // non-virtual functions in this class
529 protected:
530         ex pderivative(unsigned diff_param) const; // partial differentiation
531         static std::vector<function_options> & registered_functions();
532         bool lookup_remember_table(ex & result) const;
533         void store_remember_table(ex const & result) const;
534 public:
535         ex power(const ex & exp) const;
536         static unsigned register_new(function_options const & opt);
537         static unsigned current_serial;
538         static unsigned find_function(const std::string &name, unsigned nparams);
539         unsigned get_serial() const {return serial;}
540         std::string get_name() const;
541
542 // member variables
543
544 protected:
545         unsigned serial;
546 };
547 GINAC_DECLARE_UNARCHIVER(function);
548
549 // utility functions/macros
550
551 template <typename T>
552 inline bool is_the_function(const ex & x)
553 {
554         return is_exactly_a<function>(x)
555             && ex_to<function>(x).get_serial() == T::serial;
556 }
557
558 // Check whether OBJ is the specified symbolic function.
559 #define is_ex_the_function(OBJ, FUNCNAME) (GiNaC::is_the_function<FUNCNAME##_SERIAL>(OBJ))
560
561 } // namespace GiNaC
562
563 #endif // ndef GINAC_FUNCTION_H
564
565 END_OF_INTERFACE
566
567 $implementation=<<END_OF_IMPLEMENTATION;
568 /** \@file function.cpp
569  *
570  *  Implementation of class of symbolic functions. */
571
572 /*
573  *  This file was generated automatically by function.pl.
574  *  Please do not modify it directly, edit the perl script instead!
575  *  function.pl options: \$maxargs=${maxargs}
576  *
577  *  GiNaC Copyright (C) 1999-2010 Johannes Gutenberg University Mainz, Germany
578  *
579  *  This program is free software; you can redistribute it and/or modify
580  *  it under the terms of the GNU General Public License as published by
581  *  the Free Software Foundation; either version 2 of the License, or
582  *  (at your option) any later version.
583  *
584  *  This program is distributed in the hope that it will be useful,
585  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
586  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
587  *  GNU General Public License for more details.
588  *
589  *  You should have received a copy of the GNU General Public License
590  *  along with this program; if not, write to the Free Software
591  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
592  */
593
594 #include "function.h"
595 #include "operators.h"
596 #include "fderivative.h"
597 #include "ex.h"
598 #include "lst.h"
599 #include "symmetry.h"
600 #include "print.h"
601 #include "power.h"
602 #include "archive.h"
603 #include "inifcns.h"
604 #include "tostring.h"
605 #include "utils.h"
606 #include "hash_seed.h"
607 #include "remember.h"
608
609 #include <iostream>
610 #include <limits>
611 #include <list>
612 #include <stdexcept>
613 #include <string>
614
615 namespace GiNaC {
616
617 //////////
618 // helper class function_options
619 //////////
620
621 function_options::function_options()
622 {
623         initialize();
624 }
625
626 function_options::function_options(std::string const & n, std::string const & tn)
627 {
628         initialize();
629         set_name(n, tn);
630 }
631
632 function_options::function_options(std::string const & n, unsigned np)
633 {
634         initialize();
635         set_name(n, std::string());
636         nparams = np;
637 }
638
639 function_options::~function_options()
640 {
641         // nothing to clean up at the moment
642 }
643
644 void function_options::initialize()
645 {
646         set_name("unnamed_function", "\\\\mbox{unnamed}");
647         nparams = 0;
648         eval_f = evalf_f = real_part_f = imag_part_f = conjugate_f = derivative_f
649                 = power_f = series_f = 0;
650         evalf_params_first = true;
651         use_return_type = false;
652         eval_use_exvector_args = false;
653         evalf_use_exvector_args = false;
654         conjugate_use_exvector_args = false;
655         real_part_use_exvector_args = false;
656         imag_part_use_exvector_args = false;
657         derivative_use_exvector_args = false;
658         power_use_exvector_args = false;
659         series_use_exvector_args = false;
660         print_use_exvector_args = false;
661         use_remember = false;
662         functions_with_same_name = 1;
663         symtree = 0;
664 }
665
666 function_options & function_options::set_name(std::string const & n,
667                                               std::string const & tn)
668 {
669         name = n;
670         if (tn==std::string())
671                 TeX_name = "\\\\mbox{"+name+"}";
672         else
673                 TeX_name = tn;
674         return *this;
675 }
676
677 function_options & function_options::latex_name(std::string const & tn)
678 {
679         TeX_name = tn;
680         return *this;
681 }
682
683 // the following lines have been generated for max. ${maxargs} parameters
684 $eval_func_implementation
685 $evalf_func_implementation
686 $conjugate_func_implementation
687 $real_part_func_implementation
688 $imag_part_func_implementation
689 $derivative_func_implementation
690 $power_func_implementation
691 $series_func_implementation
692 // end of generated lines
693
694 function_options& function_options::eval_func(eval_funcp_exvector e)
695 {
696         eval_use_exvector_args = true;
697         eval_f = eval_funcp(e);
698         return *this;
699 }
700 function_options& function_options::evalf_func(evalf_funcp_exvector ef)
701 {
702         evalf_use_exvector_args = true;
703         evalf_f = evalf_funcp(ef);
704         return *this;
705 }
706 function_options& function_options::conjugate_func(conjugate_funcp_exvector c)
707 {
708         conjugate_use_exvector_args = true;
709         conjugate_f = conjugate_funcp(c);
710         return *this;
711 }
712 function_options& function_options::real_part_func(real_part_funcp_exvector c)
713 {
714         real_part_use_exvector_args = true;
715         real_part_f = real_part_funcp(c);
716         return *this;
717 }
718 function_options& function_options::imag_part_func(imag_part_funcp_exvector c)
719 {
720         imag_part_use_exvector_args = true;
721         imag_part_f = imag_part_funcp(c);
722         return *this;
723 }
724
725 function_options& function_options::derivative_func(derivative_funcp_exvector d)
726 {
727         derivative_use_exvector_args = true;
728         derivative_f = derivative_funcp(d);
729         return *this;
730 }
731 function_options& function_options::power_func(power_funcp_exvector d)
732 {
733         power_use_exvector_args = true;
734         power_f = power_funcp(d);
735         return *this;
736 }
737 function_options& function_options::series_func(series_funcp_exvector s)
738 {
739         series_use_exvector_args = true;
740         series_f = series_funcp(s);
741         return *this;
742 }
743
744 function_options & function_options::set_return_type(unsigned rt, const return_type_t* rtt)
745 {
746         use_return_type = true;
747         return_type = rt;
748         if (rtt != 0)
749                 return_type_tinfo = *rtt;
750         else
751                 return_type_tinfo = make_return_type_t<function>();
752         return *this;
753 }
754
755 function_options & function_options::do_not_evalf_params()
756 {
757         evalf_params_first = false;
758         return *this;
759 }
760
761 function_options & function_options::remember(unsigned size,
762                                               unsigned assoc_size,
763                                               unsigned strategy)
764 {
765         use_remember = true;
766         remember_size = size;
767         remember_assoc_size = assoc_size;
768         remember_strategy = strategy;
769         return *this;
770 }
771
772 function_options & function_options::overloaded(unsigned o)
773 {
774         functions_with_same_name = o;
775         return *this;
776 }
777
778 function_options & function_options::set_symmetry(const symmetry & s)
779 {
780         symtree = s;
781         return *this;
782 }
783         
784 void function_options::test_and_set_nparams(unsigned n)
785 {
786         if (nparams==0) {
787                 nparams = n;
788         } else if (nparams!=n) {
789                 // we do not throw an exception here because this code is
790                 // usually executed before main(), so the exception could not
791                 // be caught anyhow
792                 std::cerr << "WARNING: " << name << "(): number of parameters ("
793                           << n << ") differs from number set before (" 
794                           << nparams << ")" << std::endl;
795         }
796 }
797
798 void function_options::set_print_func(unsigned id, print_funcp f)
799 {
800         if (id >= print_dispatch_table.size())
801                 print_dispatch_table.resize(id + 1);
802         print_dispatch_table[id] = f;
803 }
804
805 /** This can be used as a hook for external applications. */
806 unsigned function::current_serial = 0;
807
808
809 GINAC_IMPLEMENT_REGISTERED_CLASS(function, exprseq)
810
811 //////////
812 // default constructor
813 //////////
814
815 // public
816
817 function::function() : serial(0)
818 {
819 }
820
821 //////////
822 // other constructors
823 //////////
824
825 // public
826
827 function::function(unsigned ser) : serial(ser)
828 {
829 }
830
831 // the following lines have been generated for max. ${maxargs} parameters
832 $constructors_implementation
833 // end of generated lines
834
835 function::function(unsigned ser, const exprseq & es) : exprseq(es), serial(ser)
836 {
837
838         // Force re-evaluation even if the exprseq was already evaluated
839         // (the exprseq copy constructor copies the flags)
840         clearflag(status_flags::evaluated);
841 }
842
843 function::function(unsigned ser, const exvector & v, bool discardable) 
844   : exprseq(v,discardable), serial(ser)
845 {
846         if ( ser >= registered_functions().size() ) {
847                 throw std::runtime_error("function does not exist");
848         }
849 }
850
851 function::function(unsigned ser, std::auto_ptr<exvector> vp) 
852   : exprseq(vp), serial(ser)
853 {
854 }
855
856 //////////
857 // archiving
858 //////////
859
860 /** Construct object from archive_node. */
861 void function::read_archive(const archive_node& n, lst& sym_lst)
862 {
863         inherited::read_archive(n, sym_lst);
864         // Find serial number by function name
865         std::string s;
866         if (n.find_string("name", s)) {
867                 unsigned int ser = 0;
868                 std::vector<function_options>::const_iterator i = registered_functions().begin(), iend = registered_functions().end();
869                 while (i != iend) {
870                         if (s == i->name) {
871                                 serial = ser;
872                                 return;
873                         }
874                         ++i; ++ser;
875                 }
876                 throw (std::runtime_error("unknown function '" + s + "' in archive"));
877         } else
878                 throw (std::runtime_error("unnamed function in archive"));
879 }
880
881 /** Archive the object. */
882 void function::archive(archive_node &n) const
883 {
884         inherited::archive(n);
885         GINAC_ASSERT(serial < registered_functions().size());
886         n.add_string("name", registered_functions()[serial].name);
887 }
888
889 GINAC_BIND_UNARCHIVER(function);
890
891 //////////
892 // functions overriding virtual functions from base classes
893 //////////
894
895 // public
896
897 void function::print(const print_context & c, unsigned level) const
898 {
899         GINAC_ASSERT(serial<registered_functions().size());
900         const function_options &opt = registered_functions()[serial];
901         const std::vector<print_funcp> &pdt = opt.print_dispatch_table;
902
903         // Dynamically dispatch on print_context type
904         const print_context_class_info *pc_info = &c.get_class_info();
905
906 next_context:
907         unsigned id = pc_info->options.get_id();
908         if (id >= pdt.size() || pdt[id] == NULL) {
909
910                 // Method not found, try parent print_context class
911                 const print_context_class_info *parent_pc_info = pc_info->get_parent();
912                 if (parent_pc_info) {
913                         pc_info = parent_pc_info;
914                         goto next_context;
915                 }
916
917                 // Method still not found, use default output
918                 if (is_a<print_tree>(c)) {
919
920                         c.s << std::string(level, ' ') << class_name() << " "
921                             << opt.name << " @" << this
922                             << std::hex << ", hash=0x" << hashvalue << ", flags=0x" << flags << std::dec
923                             << ", nops=" << nops()
924                             << std::endl;
925                         unsigned delta_indent = static_cast<const print_tree &>(c).delta_indent;
926                         for (size_t i=0; i<seq.size(); ++i)
927                                 seq[i].print(c, level + delta_indent);
928                         c.s << std::string(level + delta_indent, ' ') << "=====" << std::endl;
929
930                 } else if (is_a<print_csrc>(c)) {
931
932                         // Print function name in lowercase
933                         std::string lname = opt.name;
934                         size_t num = lname.size();
935                         for (size_t i=0; i<num; i++)
936                                 lname[i] = tolower(lname[i]);
937                         c.s << lname;
938                         printseq(c, '(', ',', ')', exprseq::precedence(), function::precedence());
939
940                 } else if (is_a<print_latex>(c)) {
941                         c.s << opt.TeX_name;
942                         printseq(c, '(', ',', ')', exprseq::precedence(), function::precedence());
943                 } else {
944                         c.s << opt.name;
945                         printseq(c, '(', ',', ')', exprseq::precedence(), function::precedence());
946                 }
947
948         } else {
949
950                 // Method found, call it
951                 current_serial = serial;
952                 if (opt.print_use_exvector_args)
953                         ((print_funcp_exvector)pdt[id])(seq, c);
954                 else switch (opt.nparams) {
955                         // the following lines have been generated for max. ${maxargs} parameters
956 ${print_switch_statement}
957                         // end of generated lines
958                 default:
959                         throw(std::logic_error("function::print(): invalid nparams"));
960                 }
961         }
962 }
963
964 ex function::expand(unsigned options) const
965 {
966         // Only expand arguments when asked to do so
967         if (options & expand_options::expand_function_args)
968                 return inherited::expand(options);
969         else
970                 return (options == 0) ? setflag(status_flags::expanded) : *this;
971 }
972
973 ex function::eval(int level) const
974 {
975         if (level>1) {
976                 // first evaluate children, then we will end up here again
977                 return function(serial,evalchildren(level));
978         }
979
980         GINAC_ASSERT(serial<registered_functions().size());
981         const function_options &opt = registered_functions()[serial];
982
983         // Canonicalize argument order according to the symmetry properties
984         if (seq.size() > 1 && !(opt.symtree.is_zero())) {
985                 exvector v = seq;
986                 GINAC_ASSERT(is_a<symmetry>(opt.symtree));
987                 int sig = canonicalize(v.begin(), ex_to<symmetry>(opt.symtree));
988                 if (sig != std::numeric_limits<int>::max()) {
989                         // Something has changed while sorting arguments, more evaluations later
990                         if (sig == 0)
991                                 return _ex0;
992                         return ex(sig) * thiscontainer(v);
993                 }
994         }
995
996         if (opt.eval_f==0) {
997                 return this->hold();
998         }
999
1000         bool use_remember = opt.use_remember;
1001         ex eval_result;
1002         if (use_remember && lookup_remember_table(eval_result)) {
1003                 return eval_result;
1004         }
1005         current_serial = serial;
1006         if (opt.eval_use_exvector_args)
1007                 eval_result = ((eval_funcp_exvector)(opt.eval_f))(seq);
1008         else
1009         switch (opt.nparams) {
1010                 // the following lines have been generated for max. ${maxargs} parameters
1011 ${eval_switch_statement}
1012                 // end of generated lines
1013         default:
1014                 throw(std::logic_error("function::eval(): invalid nparams"));
1015         }
1016         if (use_remember) {
1017                 store_remember_table(eval_result);
1018         }
1019         return eval_result;
1020 }
1021
1022 ex function::evalf(int level) const
1023 {
1024         GINAC_ASSERT(serial<registered_functions().size());
1025         const function_options &opt = registered_functions()[serial];
1026
1027         // Evaluate children first
1028         exvector eseq;
1029         if (level == 1 || !(opt.evalf_params_first))
1030                 eseq = seq;
1031         else if (level == -max_recursion_level)
1032                 throw(std::runtime_error("max recursion level reached"));
1033         else {
1034                 eseq.reserve(seq.size());
1035                 --level;
1036                 exvector::const_iterator it = seq.begin(), itend = seq.end();
1037                 while (it != itend) {
1038                         eseq.push_back(it->evalf(level));
1039                         ++it;
1040                 }
1041         }
1042
1043         if (opt.evalf_f==0) {
1044                 return function(serial,eseq).hold();
1045         }
1046         current_serial = serial;
1047         if (opt.evalf_use_exvector_args)
1048                 return ((evalf_funcp_exvector)(opt.evalf_f))(seq);
1049         switch (opt.nparams) {
1050                 // the following lines have been generated for max. ${maxargs} parameters
1051 ${evalf_switch_statement}
1052                 // end of generated lines
1053         }
1054         throw(std::logic_error("function::evalf(): invalid nparams"));
1055 }
1056
1057 /**
1058  *  This method is defined to be in line with behaviour of function::return_type()
1059  */
1060 ex function::eval_ncmul(const exvector & v) const
1061 {
1062         // If this function is called then the list of arguments is non-empty
1063         // and the first argument is non-commutative, see  function::return_type()
1064         return seq.begin()->eval_ncmul(v);
1065 }
1066
1067 unsigned function::calchash() const
1068 {
1069         unsigned v = golden_ratio_hash(make_hash_seed(typeid(*this)) ^ serial);
1070         for (size_t i=0; i<nops(); i++) {
1071                 v = rotate_left(v);
1072                 v ^= this->op(i).gethash();
1073         }
1074
1075         if (flags & status_flags::evaluated) {
1076                 setflag(status_flags::hash_calculated);
1077                 hashvalue = v;
1078         }
1079         return v;
1080 }
1081
1082 ex function::thiscontainer(const exvector & v) const
1083 {
1084         return function(serial, v);
1085 }
1086
1087 ex function::thiscontainer(std::auto_ptr<exvector> vp) const
1088 {
1089         return function(serial, vp);
1090 }
1091
1092 /** Implementation of ex::series for functions.
1093  *  \@see ex::series */
1094 ex function::series(const relational & r, int order, unsigned options) const
1095 {
1096         GINAC_ASSERT(serial<registered_functions().size());
1097         const function_options &opt = registered_functions()[serial];
1098
1099         if (opt.series_f==0) {
1100                 return basic::series(r, order);
1101         }
1102         ex res;
1103         current_serial = serial;
1104         if (opt.series_use_exvector_args) {
1105                 try {
1106                         res = ((series_funcp_exvector)(opt.series_f))(seq, r, order, options);
1107                 } catch (do_taylor) {
1108                         res = basic::series(r, order, options);
1109                 }
1110                 return res;
1111         }
1112         switch (opt.nparams) {
1113                 // the following lines have been generated for max. ${maxargs} parameters
1114 ${series_switch_statement}
1115                 // end of generated lines
1116         }
1117         throw(std::logic_error("function::series(): invalid nparams"));
1118 }
1119
1120 /** Implementation of ex::conjugate for functions. */
1121 ex function::conjugate() const
1122 {
1123         GINAC_ASSERT(serial<registered_functions().size());
1124         const function_options & opt = registered_functions()[serial];
1125
1126         if (opt.conjugate_f==0) {
1127                 return exprseq::conjugate();
1128         }
1129
1130         if (opt.conjugate_use_exvector_args) {
1131                 return ((conjugate_funcp_exvector)(opt.conjugate_f))(seq);
1132         }
1133
1134         switch (opt.nparams) {
1135                 // the following lines have been generated for max. ${maxargs} parameters
1136 ${conjugate_switch_statement}
1137                 // end of generated lines
1138         }
1139         throw(std::logic_error("function::conjugate(): invalid nparams"));
1140 }
1141
1142 /** Implementation of ex::real_part for functions. */
1143 ex function::real_part() const
1144 {
1145         GINAC_ASSERT(serial<registered_functions().size());
1146         const function_options & opt = registered_functions()[serial];
1147
1148         if (opt.real_part_f==0)
1149                 return basic::real_part();
1150
1151         if (opt.real_part_use_exvector_args)
1152                 return ((real_part_funcp_exvector)(opt.real_part_f))(seq);
1153
1154         switch (opt.nparams) {
1155                 // the following lines have been generated for max. ${maxargs} parameters
1156 ${real_part_switch_statement}
1157                 // end of generated lines
1158         }
1159         throw(std::logic_error("function::real_part(): invalid nparams"));
1160 }
1161
1162 /** Implementation of ex::imag_part for functions. */
1163 ex function::imag_part() const
1164 {
1165         GINAC_ASSERT(serial<registered_functions().size());
1166         const function_options & opt = registered_functions()[serial];
1167
1168         if (opt.imag_part_f==0)
1169                 return basic::imag_part();
1170
1171         if (opt.imag_part_use_exvector_args)
1172                 return ((imag_part_funcp_exvector)(opt.imag_part_f))(seq);
1173
1174         switch (opt.nparams) {
1175                 // the following lines have been generated for max. ${maxargs} parameters
1176 ${imag_part_switch_statement}
1177                 // end of generated lines
1178         }
1179         throw(std::logic_error("function::imag_part(): invalid nparams"));
1180 }
1181
1182 // protected
1183
1184 /** Implementation of ex::diff() for functions. It applies the chain rule,
1185  *  except for the Order term function.
1186  *  \@see ex::diff */
1187 ex function::derivative(const symbol & s) const
1188 {
1189         ex result;
1190
1191         if (serial == Order_SERIAL::serial) {
1192                 // Order Term function only differentiates the argument
1193                 return Order(seq[0].diff(s));
1194         } else {
1195                 // Chain rule
1196                 ex arg_diff;
1197                 size_t num = seq.size();
1198                 for (size_t i=0; i<num; i++) {
1199                         arg_diff = seq[i].diff(s);
1200                         // We apply the chain rule only when it makes sense.  This is not
1201                         // just for performance reasons but also to allow functions to
1202                         // throw when differentiated with respect to one of its arguments
1203                         // without running into trouble with our automatic full
1204                         // differentiation:
1205                         if (!arg_diff.is_zero())
1206                                 result += pderivative(i)*arg_diff;
1207                 }
1208         }
1209         return result;
1210 }
1211
1212 int function::compare_same_type(const basic & other) const
1213 {
1214         GINAC_ASSERT(is_a<function>(other));
1215         const function & o = static_cast<const function &>(other);
1216
1217         if (serial != o.serial)
1218                 return serial < o.serial ? -1 : 1;
1219         else
1220                 return exprseq::compare_same_type(o);
1221 }
1222
1223 bool function::is_equal_same_type(const basic & other) const
1224 {
1225         GINAC_ASSERT(is_a<function>(other));
1226         const function & o = static_cast<const function &>(other);
1227
1228         if (serial != o.serial)
1229                 return false;
1230         else
1231                 return exprseq::is_equal_same_type(o);
1232 }
1233
1234 bool function::match_same_type(const basic & other) const
1235 {
1236         GINAC_ASSERT(is_a<function>(other));
1237         const function & o = static_cast<const function &>(other);
1238
1239         return serial == o.serial;
1240 }
1241
1242 unsigned function::return_type() const
1243 {
1244         GINAC_ASSERT(serial<registered_functions().size());
1245         const function_options &opt = registered_functions()[serial];
1246
1247         if (opt.use_return_type) {
1248                 // Return type was explicitly specified
1249                 return opt.return_type;
1250         } else {
1251                 // Default behavior is to use the return type of the first
1252                 // argument. Thus, exp() of a matrix behaves like a matrix, etc.
1253                 if (seq.empty())
1254                         return return_types::commutative;
1255                 else
1256                         return seq.begin()->return_type();
1257         }
1258 }
1259
1260 return_type_t function::return_type_tinfo() const
1261 {
1262         GINAC_ASSERT(serial<registered_functions().size());
1263         const function_options &opt = registered_functions()[serial];
1264
1265         if (opt.use_return_type) {
1266                 // Return type was explicitly specified
1267                 return opt.return_type_tinfo;
1268         } else {
1269                 // Default behavior is to use the return type of the first
1270                 // argument. Thus, exp() of a matrix behaves like a matrix, etc.
1271                 if (seq.empty())
1272                         return make_return_type_t<function>();
1273                 else
1274                         return seq.begin()->return_type_tinfo();
1275         }
1276 }
1277
1278 //////////
1279 // new virtual functions which can be overridden by derived classes
1280 //////////
1281
1282 // none
1283
1284 //////////
1285 // non-virtual functions in this class
1286 //////////
1287
1288 // protected
1289
1290 ex function::pderivative(unsigned diff_param) const // partial differentiation
1291 {
1292         GINAC_ASSERT(serial<registered_functions().size());
1293         const function_options &opt = registered_functions()[serial];
1294         
1295         // No derivative defined? Then return abstract derivative object
1296         if (opt.derivative_f == NULL)
1297                 return fderivative(serial, diff_param, seq);
1298
1299         current_serial = serial;
1300         if (opt.derivative_use_exvector_args)
1301                 return ((derivative_funcp_exvector)(opt.derivative_f))(seq, diff_param);
1302         switch (opt.nparams) {
1303                 // the following lines have been generated for max. ${maxargs} parameters
1304 ${diff_switch_statement}
1305                 // end of generated lines
1306         }
1307         throw(std::logic_error("function::pderivative(): no diff function defined"));
1308 }
1309
1310 ex function::power(const ex & power_param) const // power of function
1311 {
1312         GINAC_ASSERT(serial<registered_functions().size());
1313         const function_options &opt = registered_functions()[serial];
1314         
1315         // No derivative defined? Then return abstract derivative object
1316         if (opt.power_f == NULL)
1317                 return (new GiNaC::power(*this, power_param))->setflag(status_flags::dynallocated |
1318                                                                        status_flags::evaluated);
1319
1320         current_serial = serial;
1321         if (opt.power_use_exvector_args)
1322                 return ((power_funcp_exvector)(opt.power_f))(seq,  power_param);
1323         switch (opt.nparams) {
1324                 // the following lines have been generated for max. ${maxargs} parameters
1325 ${power_switch_statement}
1326                 // end of generated lines
1327         }
1328         throw(std::logic_error("function::power(): no power function defined"));
1329 }
1330
1331 std::vector<function_options> & function::registered_functions()
1332 {
1333         static std::vector<function_options> rf = std::vector<function_options>();
1334         return rf;
1335 }
1336
1337 bool function::lookup_remember_table(ex & result) const
1338 {
1339         return remember_table::remember_tables()[this->serial].lookup_entry(*this,result);
1340 }
1341
1342 void function::store_remember_table(ex const & result) const
1343 {
1344         remember_table::remember_tables()[this->serial].add_entry(*this,result);
1345 }
1346
1347 // public
1348
1349 unsigned function::register_new(function_options const & opt)
1350 {
1351         size_t same_name = 0;
1352         for (size_t i=0; i<registered_functions().size(); ++i) {
1353                 if (registered_functions()[i].name==opt.name) {
1354                         ++same_name;
1355                 }
1356         }
1357         if (same_name>=opt.functions_with_same_name) {
1358                 // we do not throw an exception here because this code is
1359                 // usually executed before main(), so the exception could not
1360                 // caught anyhow
1361                 std::cerr << "WARNING: function name " << opt.name
1362                           << " already in use!" << std::endl;
1363         }
1364         registered_functions().push_back(opt);
1365         if (opt.use_remember) {
1366                 remember_table::remember_tables().
1367                         push_back(remember_table(opt.remember_size,
1368                                                  opt.remember_assoc_size,
1369                                                  opt.remember_strategy));
1370         } else {
1371                 remember_table::remember_tables().push_back(remember_table());
1372         }
1373         return registered_functions().size()-1;
1374 }
1375
1376 /** Find serial number of function by name and number of parameters.
1377  *  Throws exception if function was not found. */
1378 unsigned function::find_function(const std::string &name, unsigned nparams)
1379 {
1380         std::vector<function_options>::const_iterator i = function::registered_functions().begin(), end = function::registered_functions().end();
1381         unsigned serial = 0;
1382         while (i != end) {
1383                 if (i->get_name() == name && i->get_nparams() == nparams)
1384                         return serial;
1385                 ++i;
1386                 ++serial;
1387         }
1388         throw (std::runtime_error("no function '" + name + "' with " + ToString(nparams) + " parameters defined"));
1389 }
1390
1391 /** Return the print name of the function. */
1392 std::string function::get_name() const
1393 {
1394         if ( serial >= registered_functions().size() ) {
1395                 throw std::runtime_error("unknown function");
1396         }
1397         return registered_functions()[serial].name;
1398 }
1399
1400 } // namespace GiNaC
1401
1402 END_OF_IMPLEMENTATION
1403
1404 print "Creating interface file function.h...";
1405 open OUT,">function.h" or die "cannot open function.h";
1406 print OUT $interface;
1407 close OUT;
1408 print "ok.\n";
1409
1410 print "Creating implementation file function.cpp...";
1411 open OUT,">function.cpp" or die "cannot open function.cpp";
1412 print OUT $implementation;
1413 close OUT;
1414 print "ok.\n";
1415
1416 print "done.\n";