3 * Implementation of class of symbolic functions. */
6 * This file was generated automatically by function.py.
7 * Please do not modify it directly, edit function.cppy instead!
8 * function.py options: maxargs=@maxargs@
10 * GiNaC Copyright (C) 1999-2015 Johannes Gutenberg University Mainz, Germany
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #include "operators.h"
29 #include "fderivative.h"
39 #include "hash_seed.h"
51 // helper class function_options
54 function_options::function_options()
59 function_options::function_options(std::string const & n, std::string const & tn)
65 function_options::function_options(std::string const & n, unsigned np)
68 set_name(n, std::string());
72 function_options::~function_options()
74 // nothing to clean up at the moment
77 void function_options::initialize()
79 set_name("unnamed_function", "\\\\mbox{unnamed}");
81 eval_f = evalf_f = real_part_f = imag_part_f = conjugate_f = expand_f
82 = derivative_f = expl_derivative_f = power_f = series_f = 0;
84 evalf_params_first = true;
85 use_return_type = false;
86 eval_use_exvector_args = false;
87 evalf_use_exvector_args = false;
88 conjugate_use_exvector_args = false;
89 real_part_use_exvector_args = false;
90 imag_part_use_exvector_args = false;
91 expand_use_exvector_args = false;
92 derivative_use_exvector_args = false;
93 expl_derivative_use_exvector_args = false;
94 power_use_exvector_args = false;
95 series_use_exvector_args = false;
96 print_use_exvector_args = false;
97 info_use_exvector_args = false;
99 functions_with_same_name = 1;
103 function_options & function_options::set_name(std::string const & n,
104 std::string const & tn)
107 if (tn==std::string())
108 TeX_name = "\\\\mbox{"+name+"}";
114 function_options & function_options::latex_name(std::string const & tn)
120 // the following lines have been generated for max. @maxargs@ parameters
121 +++ for method, N in [ (f, N) for f in methods[0:-1] for N in range(1, maxargs + 1)]:
122 function_options & function_options::@method@_func(@method@_funcp_@N@ e)
124 test_and_set_nparams(@N@);
125 @method@_f = @method@_funcp(e);
129 // end of generated lines
131 +++ for method in methods[0:-1]:
132 function_options & function_options::@method@_func(@method@_funcp_exvector e)
134 @method@_use_exvector_args = true;
135 @method@_f = @method@_funcp(e);
140 // end of generated lines
142 function_options & function_options::set_return_type(unsigned rt, const return_type_t* rtt)
144 use_return_type = true;
147 return_type_tinfo = *rtt;
149 return_type_tinfo = make_return_type_t<function>();
153 function_options & function_options::do_not_evalf_params()
155 evalf_params_first = false;
159 function_options & function_options::remember(unsigned size,
164 remember_size = size;
165 remember_assoc_size = assoc_size;
166 remember_strategy = strategy;
170 function_options & function_options::overloaded(unsigned o)
172 functions_with_same_name = o;
176 function_options & function_options::set_symmetry(const symmetry & s)
182 void function_options::test_and_set_nparams(unsigned n)
186 } else if (nparams!=n) {
187 // we do not throw an exception here because this code is
188 // usually executed before main(), so the exception could not
190 std::cerr << "WARNING: " << name << "(): number of parameters ("
191 << n << ") differs from number set before ("
192 << nparams << ")" << std::endl;
196 void function_options::set_print_func(unsigned id, print_funcp f)
198 if (id >= print_dispatch_table.size())
199 print_dispatch_table.resize(id + 1);
200 print_dispatch_table[id] = f;
203 /** This can be used as a hook for external applications. */
204 unsigned function::current_serial = 0;
207 GINAC_IMPLEMENT_REGISTERED_CLASS(function, exprseq)
210 // default constructor
215 function::function() : serial(0)
220 // other constructors
225 function::function(unsigned ser) : serial(ser)
229 // the following lines have been generated for max. @maxargs@ parameters
230 +++ for N in range(1, maxargs + 1):
231 function::function(unsigned ser, @seq('const ex & param%(n)d', N)@)
232 : exprseq(@seq('param%(n)d', N)@), serial(ser)
237 function::function(unsigned ser, const exprseq & es) : exprseq(es), serial(ser)
240 // Force re-evaluation even if the exprseq was already evaluated
241 // (the exprseq copy constructor copies the flags)
242 clearflag(status_flags::evaluated);
245 function::function(unsigned ser, const exvector & v, bool discardable)
246 : exprseq(v,discardable), serial(ser)
250 function::function(unsigned ser, std::auto_ptr<exvector> vp)
251 : exprseq(vp), serial(ser)
259 /** Construct object from archive_node. */
260 void function::read_archive(const archive_node& n, lst& sym_lst)
262 inherited::read_archive(n, sym_lst);
263 // Find serial number by function name
265 if (n.find_string("name", s)) {
266 unsigned int ser = 0;
267 std::vector<function_options>::const_iterator i = registered_functions().begin(), iend = registered_functions().end();
275 throw (std::runtime_error("unknown function '" + s + "' in archive"));
277 throw (std::runtime_error("unnamed function in archive"));
280 /** Archive the object. */
281 void function::archive(archive_node &n) const
283 inherited::archive(n);
284 GINAC_ASSERT(serial < registered_functions().size());
285 n.add_string("name", registered_functions()[serial].name);
288 GINAC_BIND_UNARCHIVER(function);
291 // functions overriding virtual functions from base classes
296 void function::print(const print_context & c, unsigned level) const
298 GINAC_ASSERT(serial<registered_functions().size());
299 const function_options &opt = registered_functions()[serial];
300 const std::vector<print_funcp> &pdt = opt.print_dispatch_table;
302 // Dynamically dispatch on print_context type
303 const print_context_class_info *pc_info = &c.get_class_info();
306 unsigned id = pc_info->options.get_id();
307 if (id >= pdt.size() || pdt[id] == NULL) {
309 // Method not found, try parent print_context class
310 const print_context_class_info *parent_pc_info = pc_info->get_parent();
311 if (parent_pc_info) {
312 pc_info = parent_pc_info;
316 // Method still not found, use default output
317 if (is_a<print_tree>(c)) {
319 c.s << std::string(level, ' ') << class_name() << " "
320 << opt.name << " @" << this
321 << std::hex << ", hash=0x" << hashvalue << ", flags=0x" << flags << std::dec
322 << ", nops=" << nops()
324 unsigned delta_indent = static_cast<const print_tree &>(c).delta_indent;
325 for (size_t i=0; i<seq.size(); ++i)
326 seq[i].print(c, level + delta_indent);
327 c.s << std::string(level + delta_indent, ' ') << "=====" << std::endl;
329 } else if (is_a<print_csrc>(c)) {
331 // Print function name in lowercase
332 std::string lname = opt.name;
333 size_t num = lname.size();
334 for (size_t i=0; i<num; i++)
335 lname[i] = tolower(lname[i]);
337 printseq(c, '(', ',', ')', exprseq::precedence(), function::precedence());
339 } else if (is_a<print_latex>(c)) {
341 printseq(c, '(', ',', ')', exprseq::precedence(), function::precedence());
344 printseq(c, '(', ',', ')', exprseq::precedence(), function::precedence());
349 // Method found, call it
350 current_serial = serial;
351 if (opt.print_use_exvector_args)
352 ((print_funcp_exvector)pdt[id])(seq, c);
353 else switch (opt.nparams) {
354 // the following lines have been generated for max. @maxargs@ parameters
355 +++ for N in range(1, maxargs + 1):
357 ((print_funcp_@N@)(pdt[id]))(@seq('seq[%(n)d]', N, 0)@, c);
360 // end of generated lines
362 throw(std::logic_error("function::print(): invalid nparams"));
367 ex function::eval(int level) const
370 // first evaluate children, then we will end up here again
371 return function(serial,evalchildren(level));
374 GINAC_ASSERT(serial<registered_functions().size());
375 const function_options &opt = registered_functions()[serial];
377 // Canonicalize argument order according to the symmetry properties
378 if (seq.size() > 1 && !(opt.symtree.is_zero())) {
380 GINAC_ASSERT(is_a<symmetry>(opt.symtree));
381 int sig = canonicalize(v.begin(), ex_to<symmetry>(opt.symtree));
382 if (sig != std::numeric_limits<int>::max()) {
383 // Something has changed while sorting arguments, more evaluations later
386 return ex(sig) * thiscontainer(v);
394 bool use_remember = opt.use_remember;
396 if (use_remember && lookup_remember_table(eval_result)) {
399 current_serial = serial;
400 if (opt.eval_use_exvector_args)
401 eval_result = ((eval_funcp_exvector)(opt.eval_f))(seq);
403 switch (opt.nparams) {
404 // the following lines have been generated for max. @maxargs@ parameters
405 +++ for N in range(1, maxargs + 1):
407 eval_result = ((eval_funcp_@N@)(opt.eval_f))(@seq('seq[%(n)d]', N, 0)@);
410 // end of generated lines
412 throw(std::logic_error("function::eval(): invalid nparams"));
415 store_remember_table(eval_result);
420 ex function::evalf(int level) const
422 GINAC_ASSERT(serial<registered_functions().size());
423 const function_options &opt = registered_functions()[serial];
425 // Evaluate children first
427 if (level == 1 || !(opt.evalf_params_first))
429 else if (level == -max_recursion_level)
430 throw(std::runtime_error("max recursion level reached"));
432 eseq.reserve(seq.size());
434 exvector::const_iterator it = seq.begin(), itend = seq.end();
435 while (it != itend) {
436 eseq.push_back(it->evalf(level));
441 if (opt.evalf_f==0) {
442 return function(serial,eseq).hold();
444 current_serial = serial;
445 if (opt.evalf_use_exvector_args)
446 return ((evalf_funcp_exvector)(opt.evalf_f))(seq);
447 switch (opt.nparams) {
448 // the following lines have been generated for max. @maxargs@ parameters
449 +++ for N in range(1, maxargs + 1):
451 return ((evalf_funcp_@N@)(opt.evalf_f))(@seq('eseq[%(n)d]', N, 0)@);
453 // end of generated lines
455 throw(std::logic_error("function::evalf(): invalid nparams"));
459 * This method is defined to be in line with behaviour of function::return_type()
461 ex function::eval_ncmul(const exvector & v) const
463 // If this function is called then the list of arguments is non-empty
464 // and the first argument is non-commutative, see function::return_type()
465 return seq.begin()->eval_ncmul(v);
468 unsigned function::calchash() const
470 unsigned v = golden_ratio_hash(make_hash_seed(typeid(*this)) ^ serial);
471 for (size_t i=0; i<nops(); i++) {
473 v ^= this->op(i).gethash();
476 if (flags & status_flags::evaluated) {
477 setflag(status_flags::hash_calculated);
483 ex function::thiscontainer(const exvector & v) const
485 return function(serial, v);
488 ex function::thiscontainer(std::auto_ptr<exvector> vp) const
490 return function(serial, vp);
493 /** Implementation of ex::series for functions.
494 * \@see ex::series */
495 ex function::series(const relational & r, int order, unsigned options) const
497 GINAC_ASSERT(serial<registered_functions().size());
498 const function_options &opt = registered_functions()[serial];
500 if (opt.series_f==0) {
501 return basic::series(r, order);
504 current_serial = serial;
505 if (opt.series_use_exvector_args) {
507 res = ((series_funcp_exvector)(opt.series_f))(seq, r, order, options);
508 } catch (do_taylor) {
509 res = basic::series(r, order, options);
513 switch (opt.nparams) {
514 // the following lines have been generated for max. @maxargs@ parameters
515 +++ for N in range(1, maxargs + 1):
518 res = ((series_funcp_@N@)(opt.series_f))(@seq('seq[%(n)d]', N, 0)@, r, order, options);
519 } catch (do_taylor) {
520 res = basic::series(r, order, options);
524 // end of generated lines
526 throw(std::logic_error("function::series(): invalid nparams"));
529 /** Implementation of ex::conjugate for functions. */
530 ex function::conjugate() const
532 GINAC_ASSERT(serial<registered_functions().size());
533 const function_options & opt = registered_functions()[serial];
535 if (opt.conjugate_f==0) {
536 return conjugate_function(*this).hold();
539 if (opt.conjugate_use_exvector_args) {
540 return ((conjugate_funcp_exvector)(opt.conjugate_f))(seq);
543 switch (opt.nparams) {
544 // the following lines have been generated for max. @maxargs@ parameters
545 +++ for N in range(1, maxargs + 1):
547 return ((conjugate_funcp_@N@)(opt.conjugate_f))(@seq('seq[%(n)d]', N, 0)@);
549 // end of generated lines
551 throw(std::logic_error("function::conjugate(): invalid nparams"));
554 /** Implementation of ex::real_part for functions. */
555 ex function::real_part() const
557 GINAC_ASSERT(serial<registered_functions().size());
558 const function_options & opt = registered_functions()[serial];
560 if (opt.real_part_f==0)
561 return basic::real_part();
563 if (opt.real_part_use_exvector_args)
564 return ((real_part_funcp_exvector)(opt.real_part_f))(seq);
566 switch (opt.nparams) {
567 // the following lines have been generated for max. @maxargs@ parameters
568 +++ for N in range(1, maxargs + 1):
570 return ((real_part_funcp_@N@)(opt.real_part_f))(@seq('seq[%(n)d]', N, 0)@);
572 // end of generated lines
574 throw(std::logic_error("function::real_part(): invalid nparams"));
577 /** Implementation of ex::imag_part for functions. */
578 ex function::imag_part() const
580 GINAC_ASSERT(serial<registered_functions().size());
581 const function_options & opt = registered_functions()[serial];
583 if (opt.imag_part_f==0)
584 return basic::imag_part();
586 if (opt.imag_part_use_exvector_args)
587 return ((imag_part_funcp_exvector)(opt.imag_part_f))(seq);
589 switch (opt.nparams) {
590 // the following lines have been generated for max. @maxargs@ parameters
591 +++ for N in range(1, maxargs + 1):
593 return ((imag_part_funcp_@N@)(opt.imag_part_f))(@seq('seq[%(n)d]', N, 0)@);
595 // end of generated lines
597 throw(std::logic_error("function::imag_part(): invalid nparams"));
600 /** Implementation of ex::info for functions. */
601 bool function::info(unsigned inf) const
603 GINAC_ASSERT(serial<registered_functions().size());
604 const function_options & opt = registered_functions()[serial];
607 return basic::info(inf);
610 if (opt.info_use_exvector_args) {
611 return ((info_funcp_exvector)(opt.info_f))(seq, inf);
614 switch (opt.nparams) {
615 // the following lines have been generated for max. @maxargs@ parameters
616 +++ for N in range(1, maxargs + 1):
618 return ((info_funcp_@N@)(opt.info_f))(@seq('seq[%(n)d]', N, 0)@, inf);
620 // end of generated lines
622 throw(std::logic_error("function::info(): invalid nparams"));
627 /** Implementation of ex::diff() for functions. It applies the chain rule,
628 * except for the Order term function.
630 ex function::derivative(const symbol & s) const
635 // Explicit derivation
636 result = expl_derivative(s);
640 size_t num = seq.size();
641 for (size_t i=0; i<num; i++) {
642 arg_diff = seq[i].diff(s);
643 // We apply the chain rule only when it makes sense. This is not
644 // just for performance reasons but also to allow functions to
645 // throw when differentiated with respect to one of its arguments
646 // without running into trouble with our automatic full
648 if (!arg_diff.is_zero())
649 result += pderivative(i)*arg_diff;
655 int function::compare_same_type(const basic & other) const
657 GINAC_ASSERT(is_a<function>(other));
658 const function & o = static_cast<const function &>(other);
660 if (serial != o.serial)
661 return serial < o.serial ? -1 : 1;
663 return exprseq::compare_same_type(o);
666 bool function::is_equal_same_type(const basic & other) const
668 GINAC_ASSERT(is_a<function>(other));
669 const function & o = static_cast<const function &>(other);
671 if (serial != o.serial)
674 return exprseq::is_equal_same_type(o);
677 bool function::match_same_type(const basic & other) const
679 GINAC_ASSERT(is_a<function>(other));
680 const function & o = static_cast<const function &>(other);
682 return serial == o.serial;
685 unsigned function::return_type() const
687 GINAC_ASSERT(serial<registered_functions().size());
688 const function_options &opt = registered_functions()[serial];
690 if (opt.use_return_type) {
691 // Return type was explicitly specified
692 return opt.return_type;
694 // Default behavior is to use the return type of the first
695 // argument. Thus, exp() of a matrix behaves like a matrix, etc.
697 return return_types::commutative;
699 return seq.begin()->return_type();
703 return_type_t function::return_type_tinfo() const
705 GINAC_ASSERT(serial<registered_functions().size());
706 const function_options &opt = registered_functions()[serial];
708 if (opt.use_return_type) {
709 // Return type was explicitly specified
710 return opt.return_type_tinfo;
712 // Default behavior is to use the return type of the first
713 // argument. Thus, exp() of a matrix behaves like a matrix, etc.
715 return make_return_type_t<function>();
717 return seq.begin()->return_type_tinfo();
722 // new virtual functions which can be overridden by derived classes
728 // non-virtual functions in this class
733 ex function::pderivative(unsigned diff_param) const // partial differentiation
735 GINAC_ASSERT(serial<registered_functions().size());
736 const function_options &opt = registered_functions()[serial];
738 // No derivative defined? Then return abstract derivative object
739 if (opt.derivative_f == NULL)
740 return fderivative(serial, diff_param, seq);
742 current_serial = serial;
743 if (opt.derivative_use_exvector_args)
744 return ((derivative_funcp_exvector)(opt.derivative_f))(seq, diff_param);
745 switch (opt.nparams) {
746 // the following lines have been generated for max. @maxargs@ parameters
747 +++ for N in range(1, maxargs + 1):
749 return ((derivative_funcp_@N@)(opt.derivative_f))(@seq('seq[%(n)d]', N, 0)@, diff_param);
751 // end of generated lines
753 throw(std::logic_error("function::pderivative(): no diff function defined"));
756 ex function::expl_derivative(const symbol & s) const // explicit differentiation
758 GINAC_ASSERT(serial<registered_functions().size());
759 const function_options &opt = registered_functions()[serial];
761 // No explicit derivative defined? Then this function shall not be called!
762 if (opt.expl_derivative_f == NULL)
763 throw(std::logic_error("function::expl_derivative(): explicit derivation is called, but no such function defined"));
765 current_serial = serial;
766 if (opt.expl_derivative_use_exvector_args)
767 return ((expl_derivative_funcp_exvector)(opt.expl_derivative_f))(seq, s);
768 switch (opt.nparams) {
769 // the following lines have been generated for max. @maxargs@ parameters
770 +++ for N in range(1, maxargs + 1):
772 return ((expl_derivative_funcp_@N@)(opt.expl_derivative_f))(@seq('seq[%(n)d]', N, 0)@, s);
774 // end of generated lines
778 ex function::power(const ex & power_param) const // power of function
780 GINAC_ASSERT(serial<registered_functions().size());
781 const function_options &opt = registered_functions()[serial];
783 if (opt.power_f == NULL)
784 return (new GiNaC::power(*this, power_param))->setflag(status_flags::dynallocated |
785 status_flags::evaluated);
787 current_serial = serial;
788 if (opt.power_use_exvector_args)
789 return ((power_funcp_exvector)(opt.power_f))(seq, power_param);
790 switch (opt.nparams) {
791 // the following lines have been generated for max. @maxargs@ parameters
792 +++ for N in range(1, maxargs + 1):
794 return ((power_funcp_@N@)(opt.power_f))(@seq('seq[%(n)d]', N, 0)@, power_param);
796 // end of generated lines
798 throw(std::logic_error("function::power(): no power function defined"));
801 ex function::expand(unsigned options) const
803 GINAC_ASSERT(serial<registered_functions().size());
804 const function_options &opt = registered_functions()[serial];
806 // No expand defined? Then return the same function with expanded arguments (if required)
807 if (opt.expand_f == NULL) {
808 // Only expand arguments when asked to do so
809 if (options & expand_options::expand_function_args)
810 return inherited::expand(options);
812 return (options == 0) ? setflag(status_flags::expanded) : *this;
815 current_serial = serial;
816 if (opt.expand_use_exvector_args)
817 return ((expand_funcp_exvector)(opt.expand_f))(seq, options);
818 switch (opt.nparams) {
819 // the following lines have been generated for max. @maxargs@ parameters
820 +++ for N in range(1, maxargs + 1):
822 return ((expand_funcp_@N@)(opt.expand_f))(@seq('seq[%(n)d]', N, 0)@, options);
824 // end of generated lines
826 throw(std::logic_error("function::expand(): no expand of function defined"));
829 std::vector<function_options> & function::registered_functions()
831 static std::vector<function_options> rf = std::vector<function_options>();
835 bool function::lookup_remember_table(ex & result) const
837 return remember_table::remember_tables()[this->serial].lookup_entry(*this,result);
840 void function::store_remember_table(ex const & result) const
842 remember_table::remember_tables()[this->serial].add_entry(*this,result);
847 unsigned function::register_new(function_options const & opt)
849 size_t same_name = 0;
850 for (size_t i=0; i<registered_functions().size(); ++i) {
851 if (registered_functions()[i].name==opt.name) {
855 if (same_name>=opt.functions_with_same_name) {
856 // we do not throw an exception here because this code is
857 // usually executed before main(), so the exception could not
859 std::cerr << "WARNING: function name " << opt.name
860 << " already in use!" << std::endl;
862 registered_functions().push_back(opt);
863 if (opt.use_remember) {
864 remember_table::remember_tables().
865 push_back(remember_table(opt.remember_size,
866 opt.remember_assoc_size,
867 opt.remember_strategy));
869 remember_table::remember_tables().push_back(remember_table());
871 return registered_functions().size()-1;
874 /** Find serial number of function by name and number of parameters.
875 * Throws exception if function was not found. */
876 unsigned function::find_function(const std::string &name, unsigned nparams)
878 std::vector<function_options>::const_iterator i = function::registered_functions().begin(), end = function::registered_functions().end();
881 if (i->get_name() == name && i->get_nparams() == nparams)
886 throw (std::runtime_error("no function '" + name + "' with " + ToString(nparams) + " parameters defined"));
889 /** Return the print name of the function. */
890 std::string function::get_name() const
892 GINAC_ASSERT(serial<registered_functions().size());
893 return registered_functions()[serial].name;