A better return_type_tinfo() mechanism.
[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) 1999-2008 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         tinfo_key = &function::tinfo_static;
142 }
143 END_OF_CONSTRUCTORS_IMPLEMENTATION
144
145 $eval_switch_statement=generate(
146         <<'END_OF_EVAL_SWITCH_STATEMENT','seq[${N}-1]','','');
147         case ${N}:
148                 eval_result = ((eval_funcp_${N})(opt.eval_f))(${SEQ1});
149                 break;
150 END_OF_EVAL_SWITCH_STATEMENT
151
152 $evalf_switch_statement=generate(
153         <<'END_OF_EVALF_SWITCH_STATEMENT','eseq[${N}-1]','','');
154         case ${N}:
155                 return ((evalf_funcp_${N})(opt.evalf_f))(${SEQ1});
156 END_OF_EVALF_SWITCH_STATEMENT
157
158 $conjugate_switch_statement=generate(
159         <<'END_OF_DIFF_SWITCH_STATEMENT','seq[${N}-1]','','');
160         case ${N}:
161                 return ((conjugate_funcp_${N})(opt.conjugate_f))(${SEQ1});
162 END_OF_DIFF_SWITCH_STATEMENT
163
164 $real_part_switch_statement=generate(
165         <<'END_OF_DIFF_SWITCH_STATEMENT','seq[${N}-1]','','');
166         case ${N}:
167                 return ((real_part_funcp_${N})(opt.real_part_f))(${SEQ1});
168 END_OF_DIFF_SWITCH_STATEMENT
169
170 $imag_part_switch_statement=generate(
171         <<'END_OF_DIFF_SWITCH_STATEMENT','seq[${N}-1]','','');
172         case ${N}:
173                 return ((imag_part_funcp_${N})(opt.imag_part_f))(${SEQ1});
174 END_OF_DIFF_SWITCH_STATEMENT
175
176 $diff_switch_statement=generate(
177         <<'END_OF_DIFF_SWITCH_STATEMENT','seq[${N}-1]','','');
178         case ${N}:
179                 return ((derivative_funcp_${N})(opt.derivative_f))(${SEQ1},diff_param);
180 END_OF_DIFF_SWITCH_STATEMENT
181
182 $power_switch_statement=generate(
183         <<'END_OF_POWER_SWITCH_STATEMENT','seq[${N}-1]','','');
184         case ${N}:
185                 return ((power_funcp_${N})(opt.power_f))(${SEQ1},power_param);
186 END_OF_POWER_SWITCH_STATEMENT
187
188 $series_switch_statement=generate(
189         <<'END_OF_SERIES_SWITCH_STATEMENT','seq[${N}-1]','','');
190         case ${N}:
191                 try {
192                         res = ((series_funcp_${N})(opt.series_f))(${SEQ1},r,order,options);
193                 } catch (do_taylor) {
194                         res = basic::series(r, order, options);
195                 }
196                 return res;
197 END_OF_SERIES_SWITCH_STATEMENT
198
199 $print_switch_statement=generate(
200         <<'END_OF_PRINT_SWITCH_STATEMENT','seq[${N}-1]','','');
201                 case ${N}:
202                         ((print_funcp_${N})(pdt[id]))(${SEQ1}, c);
203                         break;
204 END_OF_PRINT_SWITCH_STATEMENT
205
206 $eval_func_implementation=generate(
207         <<'END_OF_EVAL_FUNC_IMPLEMENTATION','','','');
208 function_options & function_options::eval_func(eval_funcp_${N} e)
209 {
210         test_and_set_nparams(${N});
211         eval_f = eval_funcp(e);
212         return *this;
213 }
214 END_OF_EVAL_FUNC_IMPLEMENTATION
215
216 $evalf_func_implementation=generate(
217         <<'END_OF_EVALF_FUNC_IMPLEMENTATION','','','');
218 function_options & function_options::evalf_func(evalf_funcp_${N} ef)
219 {
220         test_and_set_nparams(${N});
221         evalf_f = evalf_funcp(ef);
222         return *this;
223 }
224 END_OF_EVALF_FUNC_IMPLEMENTATION
225
226 $conjugate_func_implementation=generate(
227         <<'END_OF_CONJUGATE_FUNC_IMPLEMENTATION','','','');
228 function_options & function_options::conjugate_func(conjugate_funcp_${N} c)
229 {
230         test_and_set_nparams(${N});
231         conjugate_f = conjugate_funcp(c);
232         return *this;
233 }
234 END_OF_CONJUGATE_FUNC_IMPLEMENTATION
235
236 $real_part_func_implementation=generate(
237         <<'END_OF_REAL_PART_FUNC_IMPLEMENTATION','','','');
238 function_options & function_options::real_part_func(real_part_funcp_${N} c)
239 {
240         test_and_set_nparams(${N});
241         real_part_f = real_part_funcp(c);
242         return *this;
243 }
244 END_OF_REAL_PART_FUNC_IMPLEMENTATION
245
246 $imag_part_func_implementation=generate(
247         <<'END_OF_IMAG_PART_FUNC_IMPLEMENTATION','','','');
248 function_options & function_options::imag_part_func(imag_part_funcp_${N} c)
249 {
250         test_and_set_nparams(${N});
251         imag_part_f = imag_part_funcp(c);
252         return *this;
253 }
254 END_OF_IMAG_PART_FUNC_IMPLEMENTATION
255
256 $derivative_func_implementation=generate(
257         <<'END_OF_DERIVATIVE_FUNC_IMPLEMENTATION','','','');
258 function_options & function_options::derivative_func(derivative_funcp_${N} d)
259 {
260         test_and_set_nparams(${N});
261         derivative_f = derivative_funcp(d);
262         return *this;
263 }
264 END_OF_DERIVATIVE_FUNC_IMPLEMENTATION
265
266 $power_func_implementation=generate(
267         <<'END_OF_POWER_FUNC_IMPLEMENTATION','','','');
268 function_options & function_options::power_func(power_funcp_${N} d)
269 {
270         test_and_set_nparams(${N});
271         power_f = power_funcp(d);
272         return *this;
273 }
274 END_OF_POWER_FUNC_IMPLEMENTATION
275
276 $series_func_implementation=generate(
277         <<'END_OF_SERIES_FUNC_IMPLEMENTATION','','','');
278 function_options & function_options::series_func(series_funcp_${N} s)
279 {
280         test_and_set_nparams(${N});
281         series_f = series_funcp(s);
282         return *this;
283 }
284 END_OF_SERIES_FUNC_IMPLEMENTATION
285
286 $interface=<<END_OF_INTERFACE;
287 /** \@file function.h
288  *
289  *  Interface to class of symbolic functions. */
290
291 /*
292  *  This file was generated automatically by function.pl.
293  *  Please do not modify it directly, edit the perl script instead!
294  *  function.pl options: \$maxargs=${maxargs}
295  *
296  *  GiNaC Copyright (C) 1999-2008 Johannes Gutenberg University Mainz, Germany
297  *
298  *  This program is free software; you can redistribute it and/or modify
299  *  it under the terms of the GNU General Public License as published by
300  *  the Free Software Foundation; either version 2 of the License, or
301  *  (at your option) any later version.
302  *
303  *  This program is distributed in the hope that it will be useful,
304  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
305  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
306  *  GNU General Public License for more details.
307  *
308  *  You should have received a copy of the GNU General Public License
309  *  along with this program; if not, write to the Free Software
310  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
311  */
312
313 #ifndef __GINAC_FUNCTION_H__
314 #define __GINAC_FUNCTION_H__
315
316 #include <string>
317 #include <vector>
318
319 // CINT needs <algorithm> to work properly with <vector>
320 #include <algorithm>
321
322 #include "exprseq.h"
323
324 // the following lines have been generated for max. ${maxargs} parameters
325 $declare_function_macro
326 // end of generated lines
327
328 #define REGISTER_FUNCTION(NAME,OPT) \\
329 unsigned NAME##_SERIAL::serial = \\
330         GiNaC::function::register_new(GiNaC::function_options(#NAME, NAME##_NPARAMS).OPT);
331
332 namespace GiNaC {
333
334 class function;
335 class symmetry;
336
337 typedef ex (* eval_funcp)();
338 typedef ex (* evalf_funcp)();
339 typedef ex (* conjugate_funcp)();
340 typedef ex (* real_part_funcp)();
341 typedef ex (* imag_part_funcp)();
342 typedef ex (* derivative_funcp)();
343 typedef ex (* power_funcp)();
344 typedef ex (* series_funcp)();
345 typedef void (* print_funcp)();
346
347 // the following lines have been generated for max. ${maxargs} parameters
348 $typedef_eval_funcp
349 $typedef_evalf_funcp
350 $typedef_conjugate_funcp
351 $typedef_real_part_funcp
352 $typedef_imag_part_funcp
353 $typedef_derivative_funcp
354 $typedef_power_funcp
355 $typedef_series_funcp
356 $typedef_print_funcp
357 // end of generated lines
358
359 // Alternatively, an exvector may be passed into the static function, instead
360 // of individual ex objects.  Then, the number of arguments is not limited.
361 typedef ex (* eval_funcp_exvector)(const exvector &);
362 typedef ex (* evalf_funcp_exvector)(const exvector &);
363 typedef ex (* conjugate_funcp_exvector)(const exvector &);
364 typedef ex (* real_part_funcp_exvector)(const exvector &);
365 typedef ex (* imag_part_funcp_exvector)(const exvector &);
366 typedef ex (* derivative_funcp_exvector)(const exvector &, unsigned);
367 typedef ex (* power_funcp_exvector)(const exvector &, const ex &);
368 typedef ex (* series_funcp_exvector)(const exvector &, const relational &, int, unsigned);
369 typedef void (* print_funcp_exvector)(const exvector &, const print_context &);
370
371
372 class function_options
373 {
374         friend class function;
375         friend class fderivative;
376 public:
377         function_options();
378         function_options(std::string const & n, std::string const & tn=std::string());
379         function_options(std::string const & n, unsigned np);
380         ~function_options();
381         void initialize();
382
383         function_options & dummy() { return *this; }
384         function_options & set_name(std::string const & n, std::string const & tn=std::string());
385         function_options & latex_name(std::string const & tn);
386 // the following lines have been generated for max. ${maxargs} parameters
387 $eval_func_interface
388 $evalf_func_interface
389 $conjugate_func_interface
390 $real_part_func_interface
391 $imag_part_func_interface
392 $derivative_func_interface
393 $power_func_interface
394 $series_func_interface
395 $print_func_interface
396 // end of generated lines
397         function_options & eval_func(eval_funcp_exvector e);
398         function_options & evalf_func(evalf_funcp_exvector ef);
399         function_options & conjugate_func(conjugate_funcp_exvector d);
400         function_options & real_part_func(real_part_funcp_exvector d);
401         function_options & imag_part_func(imag_part_funcp_exvector d);
402         function_options & derivative_func(derivative_funcp_exvector d);
403         function_options & power_func(power_funcp_exvector d);
404         function_options & series_func(series_funcp_exvector s);
405
406         template <class Ctx> function_options & print_func(print_funcp_exvector p)
407         {
408                 print_use_exvector_args = true;
409                 set_print_func(Ctx::get_class_info_static().options.get_id(), print_funcp(p));
410                 return *this;
411         }
412
413         function_options & set_return_type(unsigned rt, const return_type_t* rtt = 0);
414         function_options & do_not_evalf_params();
415         function_options & remember(unsigned size, unsigned assoc_size=0,
416                                     unsigned strategy=remember_strategies::delete_never);
417         function_options & overloaded(unsigned o);
418         function_options & set_symmetry(const symmetry & s);
419
420         std::string get_name() const { return name; }
421         unsigned get_nparams() const { return nparams; }
422
423 protected:
424         bool has_derivative() const { return derivative_f != NULL; }
425         bool has_power() const { return power_f != NULL; }
426         void test_and_set_nparams(unsigned n);
427         void set_print_func(unsigned id, print_funcp f);
428
429         std::string name;
430         std::string TeX_name;
431
432         unsigned nparams;
433
434         eval_funcp eval_f;
435         evalf_funcp evalf_f;
436         conjugate_funcp conjugate_f;
437         real_part_funcp real_part_f;
438         imag_part_funcp imag_part_f;
439         derivative_funcp derivative_f;
440         power_funcp power_f;
441         series_funcp series_f;
442         std::vector<print_funcp> print_dispatch_table;
443
444         bool evalf_params_first;
445
446         bool use_return_type;
447         unsigned return_type;
448         return_type_t return_type_tinfo;
449
450         bool use_remember;
451         unsigned remember_size;
452         unsigned remember_assoc_size;
453         unsigned remember_strategy;
454
455         bool eval_use_exvector_args;
456         bool evalf_use_exvector_args;
457         bool conjugate_use_exvector_args;
458         bool real_part_use_exvector_args;
459         bool imag_part_use_exvector_args;
460         bool derivative_use_exvector_args;
461         bool power_use_exvector_args;
462         bool series_use_exvector_args;
463         bool print_use_exvector_args;
464
465         unsigned functions_with_same_name;
466
467         ex symtree;
468 };
469
470
471 /** Exception class thrown by classes which provide their own series expansion
472  *  to signal that ordinary Taylor expansion is safe. */
473 class do_taylor {};
474
475
476 /** The class function is used to implement builtin functions like sin, cos...
477         and user defined functions */
478 class function : public exprseq
479 {
480         GINAC_DECLARE_REGISTERED_CLASS(function, exprseq)
481
482         // CINT has a linking problem
483 #ifndef __MAKECINT__
484         friend void ginsh_get_ginac_functions();
485 #endif // def __MAKECINT__
486
487         friend class remember_table_entry;
488         // friend class remember_table_list;
489         // friend class remember_table;
490
491 // member functions
492
493         // other constructors
494 public:
495         function(unsigned ser);
496         // the following lines have been generated for max. ${maxargs} parameters
497 $constructors_interface
498         // end of generated lines
499         function(unsigned ser, const exprseq & es);
500         function(unsigned ser, const exvector & v, bool discardable = false);
501         function(unsigned ser, std::auto_ptr<exvector> vp);
502
503         // functions overriding virtual functions from base classes
504 public:
505         void print(const print_context & c, unsigned level = 0) const;
506         unsigned precedence() const {return 70;}
507         ex expand(unsigned options=0) const;
508         ex eval(int level=0) const;
509         ex evalf(int level=0) const;
510         ex eval_ncmul(const exvector & v) const;
511         unsigned calchash() const;
512         ex series(const relational & r, int order, unsigned options = 0) const;
513         ex thiscontainer(const exvector & v) const;
514         ex thiscontainer(std::auto_ptr<exvector> vp) const;
515         ex conjugate() const;
516         ex real_part() const;
517         ex imag_part() const;
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
548 // utility functions/macros
549
550 template <typename T>
551 inline bool is_the_function(const ex & x)
552 {
553         return is_exactly_a<function>(x)
554             && ex_to<function>(x).get_serial() == T::serial;
555 }
556
557 // Check whether OBJ is the specified symbolic function.
558 #define is_ex_the_function(OBJ, FUNCNAME) (GiNaC::is_the_function<FUNCNAME##_SERIAL>(OBJ))
559
560 } // namespace GiNaC
561
562 #endif // ndef __GINAC_FUNCTION_H__
563
564 END_OF_INTERFACE
565
566 $implementation=<<END_OF_IMPLEMENTATION;
567 /** \@file function.cpp
568  *
569  *  Implementation of class of symbolic functions. */
570
571 /*
572  *  This file was generated automatically by function.pl.
573  *  Please do not modify it directly, edit the perl script instead!
574  *  function.pl options: \$maxargs=${maxargs}
575  *
576  *  GiNaC Copyright (C) 1999-2008 Johannes Gutenberg University Mainz, Germany
577  *
578  *  This program is free software; you can redistribute it and/or modify
579  *  it under the terms of the GNU General Public License as published by
580  *  the Free Software Foundation; either version 2 of the License, or
581  *  (at your option) any later version.
582  *
583  *  This program is distributed in the hope that it will be useful,
584  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
585  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
586  *  GNU General Public License for more details.
587  *
588  *  You should have received a copy of the GNU General Public License
589  *  along with this program; if not, write to the Free Software
590  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
591  */
592
593 #include <iostream>
594 #include <string>
595 #include <stdexcept>
596 #include <list>
597 #include <limits>
598
599 #include "function.h"
600 #include "operators.h"
601 #include "fderivative.h"
602 #include "ex.h"
603 #include "lst.h"
604 #include "symmetry.h"
605 #include "print.h"
606 #include "power.h"
607 #include "archive.h"
608 #include "inifcns.h"
609 #include "tostring.h"
610 #include "utils.h"
611 #include "remember.h"
612
613 namespace GiNaC {
614
615 //////////
616 // helper class function_options
617 //////////
618
619 function_options::function_options()
620 {
621         initialize();
622 }
623
624 function_options::function_options(std::string const & n, std::string const & tn)
625 {
626         initialize();
627         set_name(n, tn);
628 }
629
630 function_options::function_options(std::string const & n, unsigned np)
631 {
632         initialize();
633         set_name(n, std::string());
634         nparams = np;
635 }
636
637 function_options::~function_options()
638 {
639         // nothing to clean up at the moment
640 }
641
642 void function_options::initialize()
643 {
644         set_name("unnamed_function", "\\\\mbox{unnamed}");
645         nparams = 0;
646         eval_f = evalf_f = real_part_f = imag_part_f = conjugate_f = derivative_f
647                 = power_f = series_f = 0;
648         evalf_params_first = true;
649         use_return_type = false;
650         eval_use_exvector_args = false;
651         evalf_use_exvector_args = false;
652         conjugate_use_exvector_args = false;
653         real_part_use_exvector_args = false;
654         imag_part_use_exvector_args = false;
655         derivative_use_exvector_args = false;
656         power_use_exvector_args = false;
657         series_use_exvector_args = false;
658         print_use_exvector_args = false;
659         use_remember = false;
660         functions_with_same_name = 1;
661         symtree = 0;
662 }
663
664 function_options & function_options::set_name(std::string const & n,
665                                               std::string const & tn)
666 {
667         name = n;
668         if (tn==std::string())
669                 TeX_name = "\\\\mbox{"+name+"}";
670         else
671                 TeX_name = tn;
672         return *this;
673 }
674
675 function_options & function_options::latex_name(std::string const & tn)
676 {
677         TeX_name = tn;
678         return *this;
679 }
680
681 // the following lines have been generated for max. ${maxargs} parameters
682 $eval_func_implementation
683 $evalf_func_implementation
684 $conjugate_func_implementation
685 $real_part_func_implementation
686 $imag_part_func_implementation
687 $derivative_func_implementation
688 $power_func_implementation
689 $series_func_implementation
690 // end of generated lines
691
692 function_options& function_options::eval_func(eval_funcp_exvector e)
693 {
694         eval_use_exvector_args = true;
695         eval_f = eval_funcp(e);
696         return *this;
697 }
698 function_options& function_options::evalf_func(evalf_funcp_exvector ef)
699 {
700         evalf_use_exvector_args = true;
701         evalf_f = evalf_funcp(ef);
702         return *this;
703 }
704 function_options& function_options::conjugate_func(conjugate_funcp_exvector c)
705 {
706         conjugate_use_exvector_args = true;
707         conjugate_f = conjugate_funcp(c);
708         return *this;
709 }
710 function_options& function_options::real_part_func(real_part_funcp_exvector c)
711 {
712         real_part_use_exvector_args = true;
713         real_part_f = real_part_funcp(c);
714         return *this;
715 }
716 function_options& function_options::imag_part_func(imag_part_funcp_exvector c)
717 {
718         imag_part_use_exvector_args = true;
719         imag_part_f = imag_part_funcp(c);
720         return *this;
721 }
722
723 function_options& function_options::derivative_func(derivative_funcp_exvector d)
724 {
725         derivative_use_exvector_args = true;
726         derivative_f = derivative_funcp(d);
727         return *this;
728 }
729 function_options& function_options::power_func(power_funcp_exvector d)
730 {
731         power_use_exvector_args = true;
732         power_f = power_funcp(d);
733         return *this;
734 }
735 function_options& function_options::series_func(series_funcp_exvector s)
736 {
737         series_use_exvector_args = true;
738         series_f = series_funcp(s);
739         return *this;
740 }
741
742 function_options & function_options::set_return_type(unsigned rt, const return_type_t* rtt)
743 {
744         use_return_type = true;
745         return_type = rt;
746         if (rtt != 0)
747                 return_type_tinfo = *rtt;
748         else
749                 return_type_tinfo = make_return_type_t<function>();
750         return *this;
751 }
752
753 function_options & function_options::do_not_evalf_params()
754 {
755         evalf_params_first = false;
756         return *this;
757 }
758
759 function_options & function_options::remember(unsigned size,
760                                               unsigned assoc_size,
761                                               unsigned strategy)
762 {
763         use_remember = true;
764         remember_size = size;
765         remember_assoc_size = assoc_size;
766         remember_strategy = strategy;
767         return *this;
768 }
769
770 function_options & function_options::overloaded(unsigned o)
771 {
772         functions_with_same_name = o;
773         return *this;
774 }
775
776 function_options & function_options::set_symmetry(const symmetry & s)
777 {
778         symtree = s;
779         return *this;
780 }
781         
782 void function_options::test_and_set_nparams(unsigned n)
783 {
784         if (nparams==0) {
785                 nparams = n;
786         } else if (nparams!=n) {
787                 // we do not throw an exception here because this code is
788                 // usually executed before main(), so the exception could not
789                 // be caught anyhow
790                 std::cerr << "WARNING: " << name << "(): number of parameters ("
791                           << n << ") differs from number set before (" 
792                           << nparams << ")" << std::endl;
793         }
794 }
795
796 void function_options::set_print_func(unsigned id, print_funcp f)
797 {
798         if (id >= print_dispatch_table.size())
799                 print_dispatch_table.resize(id + 1);
800         print_dispatch_table[id] = f;
801 }
802
803 /** This can be used as a hook for external applications. */
804 unsigned function::current_serial = 0;
805
806
807 GINAC_IMPLEMENT_REGISTERED_CLASS(function, exprseq)
808
809 //////////
810 // default constructor
811 //////////
812
813 // public
814
815 function::function() : serial(0)
816 {
817         tinfo_key = &function::tinfo_static;
818 }
819
820 //////////
821 // other constructors
822 //////////
823
824 // public
825
826 function::function(unsigned ser) : serial(ser)
827 {
828         tinfo_key = &function::tinfo_static;
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         tinfo_key = &function::tinfo_static;
838
839         // Force re-evaluation even if the exprseq was already evaluated
840         // (the exprseq copy constructor copies the flags)
841         clearflag(status_flags::evaluated);
842 }
843
844 function::function(unsigned ser, const exvector & v, bool discardable) 
845   : exprseq(v,discardable), serial(ser)
846 {
847         tinfo_key = &function::tinfo_static;
848 }
849
850 function::function(unsigned ser, std::auto_ptr<exvector> vp) 
851   : exprseq(vp), serial(ser)
852 {
853         tinfo_key = &function::tinfo_static;
854 }
855
856 //////////
857 // archiving
858 //////////
859
860 /** Construct object from archive_node. */
861 function::function(const archive_node &n, lst &sym_lst) : inherited(n, sym_lst)
862 {
863         // Find serial number by function name
864         std::string s;
865         if (n.find_string("name", s)) {
866                 unsigned int ser = 0;
867                 std::vector<function_options>::const_iterator i = registered_functions().begin(), iend = registered_functions().end();
868                 while (i != iend) {
869                         if (s == i->name) {
870                                 serial = ser;
871                                 return;
872                         }
873                         ++i; ++ser;
874                 }
875                 throw (std::runtime_error("unknown function '" + s + "' in archive"));
876         } else
877                 throw (std::runtime_error("unnamed function in archive"));
878 }
879
880 /** Unarchive the object. */
881 ex function::unarchive(const archive_node &n, lst &sym_lst)
882 {
883         return (new function(n, sym_lst))->setflag(status_flags::dynallocated);
884 }
885
886 /** Archive the object. */
887 void function::archive(archive_node &n) const
888 {
889         inherited::archive(n);
890         GINAC_ASSERT(serial < registered_functions().size());
891         n.add_string("name", registered_functions()[serial].name);
892 }
893
894 //////////
895 // functions overriding virtual functions from base classes
896 //////////
897
898 // public
899
900 void function::print(const print_context & c, unsigned level) const
901 {
902         GINAC_ASSERT(serial<registered_functions().size());
903         const function_options &opt = registered_functions()[serial];
904         const std::vector<print_funcp> &pdt = opt.print_dispatch_table;
905
906         // Dynamically dispatch on print_context type
907         const print_context_class_info *pc_info = &c.get_class_info();
908
909 next_context:
910         unsigned id = pc_info->options.get_id();
911         if (id >= pdt.size() || pdt[id] == NULL) {
912
913                 // Method not found, try parent print_context class
914                 const print_context_class_info *parent_pc_info = pc_info->get_parent();
915                 if (parent_pc_info) {
916                         pc_info = parent_pc_info;
917                         goto next_context;
918                 }
919
920                 // Method still not found, use default output
921                 if (is_a<print_tree>(c)) {
922
923                         c.s << std::string(level, ' ') << class_name() << " "
924                             << opt.name << " @" << this
925                             << std::hex << ", hash=0x" << hashvalue << ", flags=0x" << flags << std::dec
926                             << ", nops=" << nops()
927                             << std::endl;
928                         unsigned delta_indent = static_cast<const print_tree &>(c).delta_indent;
929                         for (size_t i=0; i<seq.size(); ++i)
930                                 seq[i].print(c, level + delta_indent);
931                         c.s << std::string(level + delta_indent, ' ') << "=====" << std::endl;
932
933                 } else if (is_a<print_csrc>(c)) {
934
935                         // Print function name in lowercase
936                         std::string lname = opt.name;
937                         size_t num = lname.size();
938                         for (size_t i=0; i<num; i++)
939                                 lname[i] = tolower(lname[i]);
940                         c.s << lname;
941                         printseq(c, '(', ',', ')', exprseq::precedence(), function::precedence());
942
943                 } else if (is_a<print_latex>(c)) {
944                         c.s << opt.TeX_name;
945                         printseq(c, '(', ',', ')', exprseq::precedence(), function::precedence());
946                 } else {
947                         c.s << opt.name;
948                         printseq(c, '(', ',', ')', exprseq::precedence(), function::precedence());
949                 }
950
951         } else {
952
953                 // Method found, call it
954                 current_serial = serial;
955                 if (opt.print_use_exvector_args)
956                         ((print_funcp_exvector)pdt[id])(seq, c);
957                 else switch (opt.nparams) {
958                         // the following lines have been generated for max. ${maxargs} parameters
959 ${print_switch_statement}
960                         // end of generated lines
961                 default:
962                         throw(std::logic_error("function::print(): invalid nparams"));
963                 }
964         }
965 }
966
967 ex function::expand(unsigned options) const
968 {
969         // Only expand arguments when asked to do so
970         if (options & expand_options::expand_function_args)
971                 return inherited::expand(options);
972         else
973                 return (options == 0) ? setflag(status_flags::expanded) : *this;
974 }
975
976 ex function::eval(int level) const
977 {
978         if (level>1) {
979                 // first evaluate children, then we will end up here again
980                 return function(serial,evalchildren(level));
981         }
982
983         GINAC_ASSERT(serial<registered_functions().size());
984         const function_options &opt = registered_functions()[serial];
985
986         // Canonicalize argument order according to the symmetry properties
987         if (seq.size() > 1 && !(opt.symtree.is_zero())) {
988                 exvector v = seq;
989                 GINAC_ASSERT(is_a<symmetry>(opt.symtree));
990                 int sig = canonicalize(v.begin(), ex_to<symmetry>(opt.symtree));
991                 if (sig != std::numeric_limits<int>::max()) {
992                         // Something has changed while sorting arguments, more evaluations later
993                         if (sig == 0)
994                                 return _ex0;
995                         return ex(sig) * thiscontainer(v);
996                 }
997         }
998
999         if (opt.eval_f==0) {
1000                 return this->hold();
1001         }
1002
1003         bool use_remember = opt.use_remember;
1004         ex eval_result;
1005         if (use_remember && lookup_remember_table(eval_result)) {
1006                 return eval_result;
1007         }
1008         current_serial = serial;
1009         if (opt.eval_use_exvector_args)
1010                 eval_result = ((eval_funcp_exvector)(opt.eval_f))(seq);
1011         else
1012         switch (opt.nparams) {
1013                 // the following lines have been generated for max. ${maxargs} parameters
1014 ${eval_switch_statement}
1015                 // end of generated lines
1016         default:
1017                 throw(std::logic_error("function::eval(): invalid nparams"));
1018         }
1019         if (use_remember) {
1020                 store_remember_table(eval_result);
1021         }
1022         return eval_result;
1023 }
1024
1025 ex function::evalf(int level) const
1026 {
1027         GINAC_ASSERT(serial<registered_functions().size());
1028         const function_options &opt = registered_functions()[serial];
1029
1030         // Evaluate children first
1031         exvector eseq;
1032         if (level == 1 || !(opt.evalf_params_first))
1033                 eseq = seq;
1034         else if (level == -max_recursion_level)
1035                 throw(std::runtime_error("max recursion level reached"));
1036         else {
1037                 eseq.reserve(seq.size());
1038                 --level;
1039                 exvector::const_iterator it = seq.begin(), itend = seq.end();
1040                 while (it != itend) {
1041                         eseq.push_back(it->evalf(level));
1042                         ++it;
1043                 }
1044         }
1045
1046         if (opt.evalf_f==0) {
1047                 return function(serial,eseq).hold();
1048         }
1049         current_serial = serial;
1050         if (opt.evalf_use_exvector_args)
1051                 return ((evalf_funcp_exvector)(opt.evalf_f))(seq);
1052         switch (opt.nparams) {
1053                 // the following lines have been generated for max. ${maxargs} parameters
1054 ${evalf_switch_statement}
1055                 // end of generated lines
1056         }
1057         throw(std::logic_error("function::evalf(): invalid nparams"));
1058 }
1059
1060 /**
1061  *  This method is defined to be in line with behaviour of function::return_type()
1062  */
1063 ex function::eval_ncmul(const exvector & v) const
1064 {
1065         // If this function is called then the list of arguments is non-empty
1066         // and the first argument is non-commutative, see  function::return_type()
1067         return seq.begin()->eval_ncmul(v);
1068 }
1069
1070 unsigned function::calchash() const
1071 {
1072         const void* this_tinfo = (const void*)typeid(*this).name();
1073         unsigned v = golden_ratio_hash(golden_ratio_hash((p_int)this_tinfo) ^ serial);
1074         for (size_t i=0; i<nops(); i++) {
1075                 v = rotate_left(v);
1076                 v ^= this->op(i).gethash();
1077         }
1078
1079         if (flags & status_flags::evaluated) {
1080                 setflag(status_flags::hash_calculated);
1081                 hashvalue = v;
1082         }
1083         return v;
1084 }
1085
1086 ex function::thiscontainer(const exvector & v) const
1087 {
1088         return function(serial, v);
1089 }
1090
1091 ex function::thiscontainer(std::auto_ptr<exvector> vp) const
1092 {
1093         return function(serial, vp);
1094 }
1095
1096 /** Implementation of ex::series for functions.
1097  *  \@see ex::series */
1098 ex function::series(const relational & r, int order, unsigned options) const
1099 {
1100         GINAC_ASSERT(serial<registered_functions().size());
1101         const function_options &opt = registered_functions()[serial];
1102
1103         if (opt.series_f==0) {
1104                 return basic::series(r, order);
1105         }
1106         ex res;
1107         current_serial = serial;
1108         if (opt.series_use_exvector_args) {
1109                 try {
1110                         res = ((series_funcp_exvector)(opt.series_f))(seq, r, order, options);
1111                 } catch (do_taylor) {
1112                         res = basic::series(r, order, options);
1113                 }
1114                 return res;
1115         }
1116         switch (opt.nparams) {
1117                 // the following lines have been generated for max. ${maxargs} parameters
1118 ${series_switch_statement}
1119                 // end of generated lines
1120         }
1121         throw(std::logic_error("function::series(): invalid nparams"));
1122 }
1123
1124 /** Implementation of ex::conjugate for functions. */
1125 ex function::conjugate() const
1126 {
1127         GINAC_ASSERT(serial<registered_functions().size());
1128         const function_options & opt = registered_functions()[serial];
1129
1130         if (opt.conjugate_f==0) {
1131                 return exprseq::conjugate();
1132         }
1133
1134         if (opt.conjugate_use_exvector_args) {
1135                 return ((conjugate_funcp_exvector)(opt.conjugate_f))(seq);
1136         }
1137
1138         switch (opt.nparams) {
1139                 // the following lines have been generated for max. ${maxargs} parameters
1140 ${conjugate_switch_statement}
1141                 // end of generated lines
1142         }
1143         throw(std::logic_error("function::conjugate(): invalid nparams"));
1144 }
1145
1146 /** Implementation of ex::real_part for functions. */
1147 ex function::real_part() const
1148 {
1149         GINAC_ASSERT(serial<registered_functions().size());
1150         const function_options & opt = registered_functions()[serial];
1151
1152         if (opt.real_part_f==0)
1153                 return basic::real_part();
1154
1155         if (opt.real_part_use_exvector_args)
1156                 return ((real_part_funcp_exvector)(opt.real_part_f))(seq);
1157
1158         switch (opt.nparams) {
1159                 // the following lines have been generated for max. ${maxargs} parameters
1160 ${real_part_switch_statement}
1161                 // end of generated lines
1162         }
1163         throw(std::logic_error("function::real_part(): invalid nparams"));
1164 }
1165
1166 /** Implementation of ex::imag_part for functions. */
1167 ex function::imag_part() const
1168 {
1169         GINAC_ASSERT(serial<registered_functions().size());
1170         const function_options & opt = registered_functions()[serial];
1171
1172         if (opt.imag_part_f==0)
1173                 return basic::imag_part();
1174
1175         if (opt.imag_part_use_exvector_args)
1176                 return ((imag_part_funcp_exvector)(opt.imag_part_f))(seq);
1177
1178         switch (opt.nparams) {
1179                 // the following lines have been generated for max. ${maxargs} parameters
1180 ${imag_part_switch_statement}
1181                 // end of generated lines
1182         }
1183         throw(std::logic_error("function::imag_part(): invalid nparams"));
1184 }
1185
1186 // protected
1187
1188 /** Implementation of ex::diff() for functions. It applies the chain rule,
1189  *  except for the Order term function.
1190  *  \@see ex::diff */
1191 ex function::derivative(const symbol & s) const
1192 {
1193         ex result;
1194
1195         if (serial == Order_SERIAL::serial) {
1196                 // Order Term function only differentiates the argument
1197                 return Order(seq[0].diff(s));
1198         } else {
1199                 // Chain rule
1200                 ex arg_diff;
1201                 size_t num = seq.size();
1202                 for (size_t i=0; i<num; i++) {
1203                         arg_diff = seq[i].diff(s);
1204                         // We apply the chain rule only when it makes sense.  This is not
1205                         // just for performance reasons but also to allow functions to
1206                         // throw when differentiated with respect to one of its arguments
1207                         // without running into trouble with our automatic full
1208                         // differentiation:
1209                         if (!arg_diff.is_zero())
1210                                 result += pderivative(i)*arg_diff;
1211                 }
1212         }
1213         return result;
1214 }
1215
1216 int function::compare_same_type(const basic & other) const
1217 {
1218         GINAC_ASSERT(is_a<function>(other));
1219         const function & o = static_cast<const function &>(other);
1220
1221         if (serial != o.serial)
1222                 return serial < o.serial ? -1 : 1;
1223         else
1224                 return exprseq::compare_same_type(o);
1225 }
1226
1227 bool function::is_equal_same_type(const basic & other) const
1228 {
1229         GINAC_ASSERT(is_a<function>(other));
1230         const function & o = static_cast<const function &>(other);
1231
1232         if (serial != o.serial)
1233                 return false;
1234         else
1235                 return exprseq::is_equal_same_type(o);
1236 }
1237
1238 bool function::match_same_type(const basic & other) const
1239 {
1240         GINAC_ASSERT(is_a<function>(other));
1241         const function & o = static_cast<const function &>(other);
1242
1243         return serial == o.serial;
1244 }
1245
1246 unsigned function::return_type() const
1247 {
1248         GINAC_ASSERT(serial<registered_functions().size());
1249         const function_options &opt = registered_functions()[serial];
1250
1251         if (opt.use_return_type) {
1252                 // Return type was explicitly specified
1253                 return opt.return_type;
1254         } else {
1255                 // Default behavior is to use the return type of the first
1256                 // argument. Thus, exp() of a matrix behaves like a matrix, etc.
1257                 if (seq.empty())
1258                         return return_types::commutative;
1259                 else
1260                         return seq.begin()->return_type();
1261         }
1262 }
1263
1264 return_type_t function::return_type_tinfo() const
1265 {
1266         GINAC_ASSERT(serial<registered_functions().size());
1267         const function_options &opt = registered_functions()[serial];
1268
1269         if (opt.use_return_type) {
1270                 // Return type was explicitly specified
1271                 return opt.return_type_tinfo;
1272         } else {
1273                 // Default behavior is to use the return type of the first
1274                 // argument. Thus, exp() of a matrix behaves like a matrix, etc.
1275                 if (seq.empty())
1276                         return make_return_type_t<function>();
1277                 else
1278                         return seq.begin()->return_type_tinfo();
1279         }
1280 }
1281
1282 //////////
1283 // new virtual functions which can be overridden by derived classes
1284 //////////
1285
1286 // none
1287
1288 //////////
1289 // non-virtual functions in this class
1290 //////////
1291
1292 // protected
1293
1294 ex function::pderivative(unsigned diff_param) const // partial differentiation
1295 {
1296         GINAC_ASSERT(serial<registered_functions().size());
1297         const function_options &opt = registered_functions()[serial];
1298         
1299         // No derivative defined? Then return abstract derivative object
1300         if (opt.derivative_f == NULL)
1301                 return fderivative(serial, diff_param, seq);
1302
1303         current_serial = serial;
1304         if (opt.derivative_use_exvector_args)
1305                 return ((derivative_funcp_exvector)(opt.derivative_f))(seq, diff_param);
1306         switch (opt.nparams) {
1307                 // the following lines have been generated for max. ${maxargs} parameters
1308 ${diff_switch_statement}
1309                 // end of generated lines
1310         }
1311         throw(std::logic_error("function::pderivative(): no diff function defined"));
1312 }
1313
1314 ex function::power(const ex & power_param) const // power of function
1315 {
1316         GINAC_ASSERT(serial<registered_functions().size());
1317         const function_options &opt = registered_functions()[serial];
1318         
1319         // No derivative defined? Then return abstract derivative object
1320         if (opt.power_f == NULL)
1321                 return (new power::power(*this, power_param))->setflag(status_flags::dynallocated |
1322                                                        status_flags::evaluated);
1323
1324         current_serial = serial;
1325         if (opt.power_use_exvector_args)
1326                 return ((power_funcp_exvector)(opt.power_f))(seq,  power_param);
1327         switch (opt.nparams) {
1328                 // the following lines have been generated for max. ${maxargs} parameters
1329 ${power_switch_statement}
1330                 // end of generated lines
1331         }
1332         throw(std::logic_error("function::power(): no power function defined"));
1333 }
1334
1335 std::vector<function_options> & function::registered_functions()
1336 {
1337         static std::vector<function_options> rf = std::vector<function_options>();
1338         return rf;
1339 }
1340
1341 bool function::lookup_remember_table(ex & result) const
1342 {
1343         return remember_table::remember_tables()[this->serial].lookup_entry(*this,result);
1344 }
1345
1346 void function::store_remember_table(ex const & result) const
1347 {
1348         remember_table::remember_tables()[this->serial].add_entry(*this,result);
1349 }
1350
1351 // public
1352
1353 unsigned function::register_new(function_options const & opt)
1354 {
1355         size_t same_name = 0;
1356         for (size_t i=0; i<registered_functions().size(); ++i) {
1357                 if (registered_functions()[i].name==opt.name) {
1358                         ++same_name;
1359                 }
1360         }
1361         if (same_name>=opt.functions_with_same_name) {
1362                 // we do not throw an exception here because this code is
1363                 // usually executed before main(), so the exception could not
1364                 // caught anyhow
1365                 std::cerr << "WARNING: function name " << opt.name
1366                           << " already in use!" << std::endl;
1367         }
1368         registered_functions().push_back(opt);
1369         if (opt.use_remember) {
1370                 remember_table::remember_tables().
1371                         push_back(remember_table(opt.remember_size,
1372                                                  opt.remember_assoc_size,
1373                                                  opt.remember_strategy));
1374         } else {
1375                 remember_table::remember_tables().push_back(remember_table());
1376         }
1377         return registered_functions().size()-1;
1378 }
1379
1380 /** Find serial number of function by name and number of parameters.
1381  *  Throws exception if function was not found. */
1382 unsigned function::find_function(const std::string &name, unsigned nparams)
1383 {
1384         std::vector<function_options>::const_iterator i = function::registered_functions().begin(), end = function::registered_functions().end();
1385         unsigned serial = 0;
1386         while (i != end) {
1387                 if (i->get_name() == name && i->get_nparams() == nparams)
1388                         return serial;
1389                 ++i;
1390                 ++serial;
1391         }
1392         throw (std::runtime_error("no function '" + name + "' with " + ToString(nparams) + " parameters defined"));
1393 }
1394
1395 /** Return the print name of the function. */
1396 std::string function::get_name() const
1397 {
1398         GINAC_ASSERT(serial<registered_functions().size());
1399         return registered_functions()[serial].name;
1400 }
1401
1402 } // namespace GiNaC
1403
1404 END_OF_IMPLEMENTATION
1405
1406 print "Creating interface file function.h...";
1407 open OUT,">function.h" or die "cannot open function.h";
1408 print OUT $interface;
1409 close OUT;
1410 print "ok.\n";
1411
1412 print "Creating implementation file function.cpp...";
1413 open OUT,">function.cpp" or die "cannot open function.cpp";
1414 print OUT $implementation;
1415 close OUT;
1416 print "ok.\n";
1417
1418 print "done.\n";