X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Ffunction.pl;h=c76fe75385a184323aec6d86d7e5ae187b45ac72;hp=1a1fcbaaf073dac967107b31cf929ab2431755f0;hb=de552105d0e4304d869f3d88729b34a613a11b45;hpb=66c0f31c678e6c1938d637636b230ea376c157c1

diff --git a/ginac/function.pl b/ginac/function.pl
index 1a1fcbaa..c76fe753 100755
--- a/ginac/function.pl
+++ b/ginac/function.pl
@@ -1,131 +1,170 @@
-#!/usr/bin/perl -w
-
-$maxargs=10;
+$maxargs=13;
 
 sub generate_seq {
-    my ($seq_template,$n)=@_;
-    my ($res,$N);
-    
-    $res='';
-    for ($N=1; $N<=$n; $N++) {
-        $res .= eval('"' . $seq_template . '"');
-        if ($N!=$n) {
-            $res .= ', ';
-        }
-    }
-    return $res;
+	my ($seq_template,$n)=@_;
+	my ($res,$N);
+	
+	$res='';
+	for ($N=1; $N<=$n; $N++) {
+		$res .= eval('"' . $seq_template . '"');
+		if ($N!=$n) {
+			$res .= ', ';
+		}
+	}
+	return $res;
+}
+
+sub generate_from_to {
+	my ($template,$seq_template1,$seq_template2,$seq_template3,$from,$to)=@_;
+	my ($res,$N,$SEQ);
+
+	$res='';
+	for ($N=$from; $N<=$to; $N++) {
+		$SEQ1=generate_seq($seq_template1,$N);
+		$SEQ2=generate_seq($seq_template2,$N);
+		$SEQ3=generate_seq($seq_template3,$N);
+		$res .= eval('"' . $template . '"');
+		$SEQ1=''; # to avoid main::SEQ1 used only once warning
+		$SEQ2=''; # same as above
+		$SEQ3=''; # same as above
+	}
+	return $res;
 }
 
 sub generate {
-    my ($template,$seq_template1,$seq_template2)=@_;
-    my ($res,$N,$SEQ);
-
-    $res='';
-    for ($N=1; $N<=$maxargs; $N++) {
-        $SEQ1=generate_seq($seq_template1,$N);
-        $SEQ2=generate_seq($seq_template2,$N);
-        $res .= eval('"' . $template . '"');
-        $SEQ1=''; # to avoid main::SEQ1 used only once warning
-        $SEQ2=''; # same as above
-    }
-    return $res;
-}
-
-$declare_function_macro=generate(
-    <<'END_OF_DECLARE_FUNCTION_MACRO','ex const & p${N}','p${N}');
+	my ($template,$seq_template1,$seq_template2,$seq_template3)=@_;
+	return generate_from_to($template,$seq_template1,$seq_template2,$seq_template3,1,$maxargs);
+}
+
+$declare_function_macro = generate(
+	<<'END_OF_DECLARE_FUNCTION_MACRO','typename T${N}','const T${N} & p${N}','GiNaC::ex(p${N})');
 #define DECLARE_FUNCTION_${N}P(NAME) \\
-extern unsigned function_index_##NAME; \\
-inline function NAME(${SEQ1}) { \\
-    return function(function_index_##NAME, ${SEQ2}); \\
+extern const unsigned function_index_##NAME; \\
+template<${SEQ1}> \\
+inline const GiNaC::function NAME(${SEQ2}) { \\
+	return GiNaC::function(function_index_##NAME, ${SEQ3}); \\
 }
 
 END_OF_DECLARE_FUNCTION_MACRO
 
 $typedef_eval_funcp=generate(
 'typedef ex (* eval_funcp_${N})(${SEQ1});'."\n",
-'ex const &','');
+'const ex &','','');
 
 $typedef_evalf_funcp=generate(
 'typedef ex (* evalf_funcp_${N})(${SEQ1});'."\n",
-'ex const &','');
+'const ex &','','');
 
-$typedef_diff_funcp=generate(
-'typedef ex (* diff_funcp_${N})(${SEQ1}, unsigned);'."\n",
-'ex const &','');
+$typedef_derivative_funcp=generate(
+'typedef ex (* derivative_funcp_${N})(${SEQ1}, unsigned);'."\n",
+'const ex &','','');
 
 $typedef_series_funcp=generate(
-'typedef ex (* series_funcp_${N})(${SEQ1}, symbol const &, ex const &, int);'."\n",
-'ex const &','');
+'typedef ex (* series_funcp_${N})(${SEQ1}, const relational &, int, unsigned);'."\n",
+'const ex &','','');
+
+$eval_func_interface=generate('    function_options & eval_func(eval_funcp_${N} e);'."\n",'','','');
+
+$evalf_func_interface=generate('    function_options & evalf_func(evalf_funcp_${N} ef);'."\n",'','','');
+
+$derivative_func_interface=generate('    function_options & derivative_func(derivative_funcp_${N} d);'."\n",'','','');
+
+$series_func_interface=generate('    function_options & series_func(series_funcp_${N} s);'."\n",'','','');
 
 $constructors_interface=generate(
 '    function(unsigned ser, ${SEQ1});'."\n",
-'ex const & param${N}','');
-
-$register_new_interface=generate(
-'    static unsigned register_new(char const * nm, eval_funcp_${N} e,'."\n".
-'                                 evalf_funcp_${N} ef=0, diff_funcp_${N} d=0, series_funcp_${N} s=0);'.
-"\n",'','');
+'const ex & param${N}','','');
 
 $constructors_implementation=generate(
-    <<'END_OF_CONSTRUCTORS_IMPLEMENTATION','ex const & param${N}','param${N}');
+	<<'END_OF_CONSTRUCTORS_IMPLEMENTATION','const ex & param${N}','param${N}','');
 function::function(unsigned ser, ${SEQ1})
-    : exprseq(${SEQ2}), serial(ser)
+	: exprseq(${SEQ2}), serial(ser)
 {
-    debugmsg(\"function constructor from unsigned,${N}*ex\",LOGLEVEL_CONSTRUCT);
-    tinfo_key = TINFO_function;
+	tinfo_key = TINFO_function;
 }
 END_OF_CONSTRUCTORS_IMPLEMENTATION
 
 $eval_switch_statement=generate(
-    <<'END_OF_EVAL_SWITCH_STATEMENT','eseq[${N}-1]','');
-    case ${N}:
-        return ((eval_funcp_${N})(registered_functions()[serial].e))(${SEQ1});
-        break;
+	<<'END_OF_EVAL_SWITCH_STATEMENT','seq[${N}-1]','','');
+	case ${N}:
+		eval_result = ((eval_funcp_${N})(registered_functions()[serial].eval_f))(${SEQ1});
+		break;
 END_OF_EVAL_SWITCH_STATEMENT
 
 $evalf_switch_statement=generate(
-    <<'END_OF_EVALF_SWITCH_STATEMENT','eseq[${N}-1]','');
-    case ${N}:
-        return ((evalf_funcp_${N})(registered_functions()[serial].ef))(${SEQ1});
-        break;
+	<<'END_OF_EVALF_SWITCH_STATEMENT','eseq[${N}-1]','','');
+	case ${N}:
+		return ((evalf_funcp_${N})(registered_functions()[serial].evalf_f))(${SEQ1});
 END_OF_EVALF_SWITCH_STATEMENT
 
 $diff_switch_statement=generate(
-    <<'END_OF_DIFF_SWITCH_STATEMENT','seq[${N}-1]','');
-    case ${N}:
-        return ((diff_funcp_${N})(registered_functions()[serial].d))(${SEQ1},diff_param);
-        break;
+	<<'END_OF_DIFF_SWITCH_STATEMENT','seq[${N}-1]','','');
+	case ${N}:
+		return ((derivative_funcp_${N})(registered_functions()[serial].derivative_f))(${SEQ1},diff_param);
 END_OF_DIFF_SWITCH_STATEMENT
 
 $series_switch_statement=generate(
-    <<'END_OF_SERIES_SWITCH_STATEMENT','seq[${N}-1]','');
-    case ${N}:
-        return ((series_funcp_${N})(registered_functions()[serial].s))(${SEQ1},s,point,order);
-        break;
+	<<'END_OF_SERIES_SWITCH_STATEMENT','seq[${N}-1]','','');
+	case ${N}:
+		try {
+			res = ((series_funcp_${N})(registered_functions()[serial].series_f))(${SEQ1},r,order,options);
+		} catch (do_taylor) {
+			res = basic::series(r, order, options);
+		}
+		return res;
 END_OF_SERIES_SWITCH_STATEMENT
 
-$register_new_implementation=generate(
-    <<'END_OF_REGISTER_NEW_IMPLEMENTATION','','');
-unsigned function::register_new(char const * nm, eval_funcp_${N} e,
-                                 evalf_funcp_${N} ef, diff_funcp_${N} d, series_funcp_${N} s)
+$eval_func_implementation=generate(
+	<<'END_OF_EVAL_FUNC_IMPLEMENTATION','','','');
+function_options & function_options::eval_func(eval_funcp_${N} e)
 {
-    registered_function_info rfi={nm,${N},0,eval_funcp(e),
-                                  evalf_funcp(ef),diff_funcp(d),series_funcp(s)};
-    registered_functions().push_back(rfi);
-    return registered_functions().size()-1;
+	test_and_set_nparams(${N});
+	eval_f = eval_funcp(e);
+	return *this;
 }
-END_OF_REGISTER_NEW_IMPLEMENTATION
+END_OF_EVAL_FUNC_IMPLEMENTATION
+
+$evalf_func_implementation=generate(
+	<<'END_OF_EVALF_FUNC_IMPLEMENTATION','','','');
+function_options & function_options::evalf_func(evalf_funcp_${N} ef)
+{
+	test_and_set_nparams(${N});
+	evalf_f = evalf_funcp(ef);
+	return *this;
+}
+END_OF_EVALF_FUNC_IMPLEMENTATION
+
+$derivative_func_implementation=generate(
+	<<'END_OF_DERIVATIVE_FUNC_IMPLEMENTATION','','','');
+function_options & function_options::derivative_func(derivative_funcp_${N} d)
+{
+	test_and_set_nparams(${N});
+	derivative_f = derivative_funcp(d);
+	return *this;
+}
+END_OF_DERIVATIVE_FUNC_IMPLEMENTATION
+
+$series_func_implementation=generate(
+	<<'END_OF_SERIES_FUNC_IMPLEMENTATION','','','');
+function_options & function_options::series_func(series_funcp_${N} s)
+{
+	test_and_set_nparams(${N});
+	series_f = series_funcp(s);
+	return *this;
+}
+END_OF_SERIES_FUNC_IMPLEMENTATION
 
 $interface=<<END_OF_INTERFACE;
 /** \@file function.h
  *
- *  Interface to abstract class function (new function concept).
- *
+ *  Interface to class of symbolic functions. */
+
+/*
  *  This file was generated automatically by function.pl.
  *  Please do not modify it directly, edit the perl script instead!
  *  function.pl options: \$maxargs=${maxargs}
  *
- *  GiNaC Copyright (C) 1999 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2002 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -147,134 +186,188 @@ $interface=<<END_OF_INTERFACE;
 
 #include <string>
 #include <vector>
-#include <ginac/exprseq.h>
 
-class function;
+// CINT needs <algorithm> to work properly with <vector>
+#include <algorithm>
+
+#include "exprseq.h"
 
 // the following lines have been generated for max. ${maxargs} parameters
 $declare_function_macro
 // end of generated lines
 
-#define REGISTER_FUNCTION(NAME,E,EF,D,S) \\
-unsigned function_index_##NAME=function::register_new(#NAME,E,EF,D,S);
-
-#define BEGIN_TYPECHECK \\
-bool automatic_typecheck=true;
-
-#define TYPECHECK(VAR,TYPE) \\
-if (!is_ex_exactly_of_type(VAR,TYPE)) { \\
-    automatic_typecheck=false; \\
-} else
+#define REGISTER_FUNCTION(NAME,OPT) \\
+const unsigned function_index_##NAME= \\
+	GiNaC::function::register_new(GiNaC::function_options(#NAME).OPT);
 
-#define TYPECHECK_INTEGER(VAR) \\
-if (!(VAR).info(info_flags::integer)) { \\
-    automatic_typecheck=false; \\
-} else
+namespace GiNaC {
 
-#define END_TYPECHECK(RV) \\
-{} \\
-if (!automatic_typecheck) { \\
-    return RV.hold(); \\
-}
+class function;
+class symmetry;
 
 typedef ex (* eval_funcp)();
 typedef ex (* evalf_funcp)();
-typedef ex (* diff_funcp)();
+typedef ex (* derivative_funcp)();
 typedef ex (* series_funcp)();
 
 // the following lines have been generated for max. ${maxargs} parameters
 $typedef_eval_funcp
 $typedef_evalf_funcp
-$typedef_diff_funcp
+$typedef_derivative_funcp
 $typedef_series_funcp
 // end of generated lines
 
-struct registered_function_info {
-    char const * name;
-    unsigned nparams;
-    unsigned options;
-    eval_funcp e;
-    evalf_funcp ef;
-    diff_funcp d;
-    series_funcp s;
+// Alternatively, an exvector may be passed into the static function, instead
+// of individual ex objects.  Then, the number of arguments is not limited.
+typedef ex (* eval_funcp_exvector)(const exvector &);
+typedef ex (* evalf_funcp_exvector)(const exvector &);
+typedef ex (* derivative_funcp_exvector)(const exvector &, unsigned);
+typedef ex (* series_funcp_exvector)(const exvector &, const relational &, int, unsigned);
+
+class function_options
+{
+	friend class function;
+	friend class fderivative;
+public:
+	function_options();
+	function_options(std::string const & n, std::string const & tn=std::string());
+	~function_options();
+	void initialize(void);
+	function_options & set_name(std::string const & n, std::string const & tn=std::string());
+	function_options & latex_name(std::string const & tn);
+// the following lines have been generated for max. ${maxargs} parameters
+$eval_func_interface
+$evalf_func_interface
+$derivative_func_interface
+$series_func_interface
+// end of generated lines
+	function_options & eval_func(eval_funcp_exvector e);
+	function_options & evalf_func(evalf_funcp_exvector ef);
+	function_options & derivative_func(derivative_funcp_exvector d);
+	function_options & series_func(series_funcp_exvector s);
+
+	function_options & set_return_type(unsigned rt, unsigned rtt=0);
+	function_options & do_not_evalf_params(void);
+	function_options & remember(unsigned size, unsigned assoc_size=0,
+	                            unsigned strategy=remember_strategies::delete_never);
+	function_options & overloaded(unsigned o);
+	function_options & set_symmetry(const symmetry & s);
+	void test_and_set_nparams(unsigned n);
+	std::string get_name(void) const { return name; }
+	unsigned get_nparams(void) const { return nparams; }
+	bool has_derivative(void) const { return derivative_f != NULL; }
+
+protected:
+	std::string name;
+	std::string TeX_name;
+
+	unsigned nparams;
+
+	eval_funcp eval_f;
+	evalf_funcp evalf_f;
+	derivative_funcp derivative_f;
+	series_funcp series_f;
+
+	bool evalf_params_first;
+
+	bool use_return_type;
+	unsigned return_type;
+	unsigned return_type_tinfo;
+
+	bool use_remember;
+	unsigned remember_size;
+	unsigned remember_assoc_size;
+	unsigned remember_strategy;
+
+	bool eval_use_exvector_args;
+	bool evalf_use_exvector_args;
+	bool derivative_use_exvector_args;
+	bool series_use_exvector_args;
+
+	unsigned functions_with_same_name;
+
+	ex symtree;
 };
 
 /** The class function is used to implement builtin functions like sin, cos...
-    and user defined functions */
+	and user defined functions */
 class function : public exprseq
 {
-    friend void ginsh_get_ginac_functions(void);
+	GINAC_DECLARE_REGISTERED_CLASS(function, exprseq)
 
-// member functions
+	// CINT has a linking problem
+#ifndef __MAKECINT__
+	friend void ginsh_get_ginac_functions(void);
+#endif // def __MAKECINT__
 
-    // default constructor, destructor, copy constructor assignment operator and helpers
-public:
-    function();
-    ~function();
-    function(function const & other);
-    function const & operator=(function const & other);
-protected:
-    void copy(function const & other);
-    void destroy(bool call_parent);
+	friend class remember_table_entry;
+	// friend class remember_table_list;
+	// friend class remember_table;
+
+// member functions
 
-    // other constructors
+	// other ctors
 public:
-    function(unsigned ser);
-    // the following lines have been generated for max. ${maxargs} parameters
+	function(unsigned ser);
+	// the following lines have been generated for max. ${maxargs} parameters
 $constructors_interface
-    // end of generated lines
-    function(unsigned ser, exprseq const & es);
-    function(unsigned ser, exvector const & v, bool discardable=0);
-    function(unsigned ser, exvector * vp); // vp will be deleted
+	// end of generated lines
+	function(unsigned ser, const exprseq & es);
+	function(unsigned ser, const exvector & v, bool discardable = false);
+	function(unsigned ser, exvector * vp); // vp will be deleted
 
-    // functions overriding virtual functions from bases classes
+	// functions overriding virtual functions from base classes
 public:
-    basic * duplicate() const;
-    void printraw(ostream & os) const; 
-    void print(ostream & os, unsigned upper_precedence=0) const;
-    void printtree(ostream & os, unsigned indent) const;
-    void printcsrc(ostream & os, unsigned type, unsigned upper_precedence=0) const;
-    ex expand(unsigned options=0) const;
-    ex eval(int level=0) const;
-    ex evalf(int level=0) const;
-    ex diff(symbol const & s) const;
-    ex series(symbol const & s, ex const & point, int order) const;
-    ex thisexprseq(exvector const & v) const;
-    ex thisexprseq(exvector * vp) const;
+	void print(const print_context & c, unsigned level = 0) const;
+	unsigned precedence(void) const {return 70;}
+	ex expand(unsigned options=0) const;
+	ex eval(int level=0) const;
+	ex evalf(int level=0) const;
+	unsigned calchash(void) const;
+	ex series(const relational & r, int order, unsigned options = 0) const;
+	ex thisexprseq(const exvector & v) const;
+	ex thisexprseq(exvector * vp) const;
 protected:
-    int compare_same_type(basic const & other) const;
-    bool is_equal_same_type(basic const & other) const;
-    unsigned return_type(void) const;
-    unsigned return_type_tinfo(void) const;
-    
-    // new virtual functions which can be overridden by derived classes
-    // none
-    
-    // non-virtual functions in this class
+	ex derivative(const symbol & s) const;
+	bool is_equal_same_type(const basic & other) const;
+	bool match_same_type(const basic & other) const;
+	unsigned return_type(void) const;
+	unsigned return_type_tinfo(void) const;
+	
+	// new virtual functions which can be overridden by derived classes
+	// none
+	
+	// non-virtual functions in this class
 protected:
-    ex pdiff(unsigned diff_param) const; // partial differentiation
-    static vector<registered_function_info> & registered_functions(void);
+	ex pderivative(unsigned diff_param) const; // partial differentiation
+	static std::vector<function_options> & registered_functions(void);
+	bool lookup_remember_table(ex & result) const;
+	void store_remember_table(ex const & result) const;
 public:
-    // the following lines have been generated for max. ${maxargs} parameters
-$register_new_interface
-    // end of generated lines
-    unsigned getserial(void) const {return serial;}
-    
+	static unsigned register_new(function_options const & opt);
+	static unsigned current_serial;
+	static unsigned find_function(const std::string &name, unsigned nparams);
+	unsigned get_serial(void) const {return serial;}
+	std::string get_name(void) const;
+
 // member variables
 
 protected:
-    unsigned serial;
+	unsigned serial;
 };
 
-// utility macros
+// utility functions/macros
 
-#define is_ex_the_function(OBJ, FUNCNAME) \\
-    (is_ex_exactly_of_type(OBJ, function) && static_cast<function *>(OBJ.bp)->getserial() == function_index_##FUNCNAME)
+/** Specialization of is_exactly_a<function>(obj) for objects of type function. */
+template<> inline bool is_exactly_a<function>(const basic & obj)
+{
+	return obj.tinfo()==TINFO_function;
+}
 
-// global constants
+#define is_ex_the_function(OBJ, FUNCNAME) \\
+	(GiNaC::is_exactly_a<GiNaC::function>(OBJ) && GiNaC::ex_to<GiNaC::function>(OBJ).get_serial() == GiNaC::function_index_##FUNCNAME)
 
-extern const function some_function;
-extern type_info const & typeid_function;
+} // namespace GiNaC
 
 #endif // ndef __GINAC_FUNCTION_H__
 
@@ -283,13 +376,14 @@ END_OF_INTERFACE
 $implementation=<<END_OF_IMPLEMENTATION;
 /** \@file function.cpp
  *
- *  Implementation of class function.
- *
+ *  Implementation of class of symbolic functions. */
+
+/*
  *  This file was generated automatically by function.pl.
  *  Please do not modify it directly, edit the perl script instead!
  *  function.pl options: \$maxargs=${maxargs}
  *
- *  GiNaC Copyright (C) 1999 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2002 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -306,275 +400,531 @@ $implementation=<<END_OF_IMPLEMENTATION;
  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
+#include <iostream>
 #include <string>
 #include <stdexcept>
+#include <list>
 
 #include "function.h"
+#include "fderivative.h"
 #include "ex.h"
+#include "lst.h"
+#include "symmetry.h"
+#include "print.h"
+#include "archive.h"
+#include "inifcns.h"
+#include "tostring.h"
+#include "utils.h"
+#include "remember.h"
+
+namespace GiNaC {
 
 //////////
-// default constructor, destructor, copy constructor assignment operator and helpers
+// helper class function_options
 //////////
 
-// public
+function_options::function_options()
+{
+	initialize();
+}
 
-function::function() : serial(0)
+function_options::function_options(std::string const & n, std::string const & tn)
+{
+	initialize();
+	set_name(n,tn);
+}
+
+function_options::~function_options()
+{
+	// nothing to clean up at the moment
+}
+
+void function_options::initialize(void)
+{
+	set_name("unnamed_function","\\\\mbox{unnamed}");
+	nparams = 0;
+	eval_f = evalf_f = derivative_f = series_f = 0;
+	evalf_params_first = true;
+	use_return_type = false;
+	eval_use_exvector_args = false;
+	evalf_use_exvector_args = false;
+	derivative_use_exvector_args = false;
+	series_use_exvector_args = false;
+	use_remember = false;
+	functions_with_same_name = 1;
+	symtree = 0;
+}
+
+function_options & function_options::set_name(std::string const & n,
+                                              std::string const & tn)
+{
+	name = n;
+	if (tn==std::string())
+		TeX_name = "\\\\mbox{"+name+"}";
+	else
+		TeX_name = tn;
+	return *this;
+}
+
+function_options & function_options::latex_name(std::string const & tn)
+{
+	TeX_name = tn;
+	return *this;
+}
+
+// the following lines have been generated for max. ${maxargs} parameters
+$eval_func_implementation
+$evalf_func_implementation
+$derivative_func_implementation
+$series_func_implementation
+// end of generated lines
+
+function_options& function_options::eval_func(eval_funcp_exvector e)
 {
-    debugmsg("function default constructor",LOGLEVEL_CONSTRUCT);
-    tinfo_key = TINFO_function;
+	eval_use_exvector_args = true;
+	eval_f = eval_funcp(e);
+	return *this;
+}
+function_options& function_options::evalf_func(evalf_funcp_exvector ef)
+{
+	evalf_use_exvector_args = true;
+	evalf_f = evalf_funcp(ef);
+	return *this;
+}
+function_options& function_options::derivative_func(derivative_funcp_exvector d)
+{
+	derivative_use_exvector_args = true;
+	derivative_f = derivative_funcp(d);
+	return *this;
+}
+function_options& function_options::series_func(series_funcp_exvector s)
+{
+	series_use_exvector_args = true;
+	series_f = series_funcp(s);
+	return *this;
+}
+
+
+function_options & function_options::set_return_type(unsigned rt, unsigned rtt)
+{
+	use_return_type = true;
+	return_type = rt;
+	return_type_tinfo = rtt;
+	return *this;
 }
 
-function::~function()
+function_options & function_options::do_not_evalf_params(void)
 {
-    debugmsg("function destructor",LOGLEVEL_DESTRUCT);
-    destroy(0);
+	evalf_params_first = false;
+	return *this;
 }
 
-function::function(function const & other)
+function_options & function_options::remember(unsigned size,
+                                              unsigned assoc_size,
+                                              unsigned strategy)
 {
-    debugmsg("function copy constructor",LOGLEVEL_CONSTRUCT);
-    copy(other);
+	use_remember = true;
+	remember_size = size;
+	remember_assoc_size = assoc_size;
+	remember_strategy = strategy;
+	return *this;
 }
 
-function const & function::operator=(function const & other)
+function_options & function_options::overloaded(unsigned o)
 {
-    debugmsg("function operator=",LOGLEVEL_ASSIGNMENT);
-    if (this != &other) {
-        destroy(1);
-        copy(other);
-    }
-    return *this;
+	functions_with_same_name = o;
+	return *this;
+}
+
+function_options & function_options::set_symmetry(const symmetry & s)
+{
+	symtree = s;
+	return *this;
+}
+	
+void function_options::test_and_set_nparams(unsigned n)
+{
+	if (nparams==0) {
+		nparams = n;
+	} else if (nparams!=n) {
+		// we do not throw an exception here because this code is
+		// usually executed before main(), so the exception could not
+		// caught anyhow
+		std::cerr << "WARNING: number of parameters ("
+		          << n << ") differs from number set before (" 
+		          << nparams << ")" << std::endl;
+	}
+}
+
+/** This can be used as a hook for external applications. */
+unsigned function::current_serial = 0;
+
+
+GINAC_IMPLEMENT_REGISTERED_CLASS(function, exprseq)
+
+//////////
+// default ctor, dtor, copy ctor, assignment operator and helpers
+//////////
+
+// public
+
+function::function() : serial(0)
+{
+	tinfo_key = TINFO_function;
 }
 
 // protected
 
-void function::copy(function const & other)
+void function::copy(const function & other)
 {
-    exprseq::copy(other);
-    serial=other.serial;
+	inherited::copy(other);
+	serial = other.serial;
 }
 
 void function::destroy(bool call_parent)
 {
-    if (call_parent) exprseq::destroy(call_parent);
+	if (call_parent)
+		inherited::destroy(call_parent);
 }
 
 //////////
-// other constructors
+// other ctors
 //////////
 
 // public
 
 function::function(unsigned ser) : serial(ser)
 {
-    debugmsg("function constructor from unsigned",LOGLEVEL_CONSTRUCT);
-    tinfo_key = TINFO_function;
+	tinfo_key = TINFO_function;
 }
 
 // the following lines have been generated for max. ${maxargs} parameters
 $constructors_implementation
 // end of generated lines
 
-function::function(unsigned ser, exprseq const & es) : exprseq(es), serial(ser)
+function::function(unsigned ser, const exprseq & es) : exprseq(es), serial(ser)
 {
-    debugmsg("function constructor from unsigned,exprseq",LOGLEVEL_CONSTRUCT);
-    tinfo_key = TINFO_function;
+	tinfo_key = TINFO_function;
 }
 
-function::function(unsigned ser, exvector const & v, bool discardable) 
-    : exprseq(v,discardable), serial(ser)
+function::function(unsigned ser, const exvector & v, bool discardable) 
+  : exprseq(v,discardable), serial(ser)
 {
-    debugmsg("function constructor from string,exvector,bool",LOGLEVEL_CONSTRUCT);
-    tinfo_key = TINFO_function;
+	tinfo_key = TINFO_function;
 }
 
 function::function(unsigned ser, exvector * vp) 
-    : exprseq(vp), serial(ser)
+  : exprseq(vp), serial(ser)
 {
-    debugmsg("function constructor from unsigned,exvector *",LOGLEVEL_CONSTRUCT);
-    tinfo_key = TINFO_function;
+	tinfo_key = TINFO_function;
 }
 
 //////////
-// functions overriding virtual functions from bases classes
+// archiving
 //////////
 
-// public
-
-basic * function::duplicate() const
+/** Construct object from archive_node. */
+function::function(const archive_node &n, const lst &sym_lst) : inherited(n, sym_lst)
 {
-    debugmsg("function duplicate",LOGLEVEL_DUPLICATE);
-    return new function(*this);
+	// Find serial number by function name
+	std::string s;
+	if (n.find_string("name", s)) {
+		unsigned int ser = 0;
+		std::vector<function_options>::const_iterator i = registered_functions().begin(), iend = registered_functions().end();
+		while (i != iend) {
+			if (s == i->name) {
+				serial = ser;
+				return;
+			}
+			++i; ++ser;
+		}
+		throw (std::runtime_error("unknown function '" + s + "' in archive"));
+	} else
+		throw (std::runtime_error("unnamed function in archive"));
 }
 
-void function::printraw(ostream & os) const
+/** Unarchive the object. */
+ex function::unarchive(const archive_node &n, const lst &sym_lst)
 {
-    debugmsg("function printraw",LOGLEVEL_PRINT);
-
-    ASSERT(serial<registered_functions().size());
-
-    os << "function(name=" << registered_functions()[serial].name;
-    for (exvector::const_iterator it=seq.begin(); it!=seq.end(); ++it) {
-        os << ",";
-        (*it).bp->print(os);
-    }
-    os << ")";
+	return (new function(n, sym_lst))->setflag(status_flags::dynallocated);
 }
 
-void function::print(ostream & os, unsigned upper_precedence) const
+/** Archive the object. */
+void function::archive(archive_node &n) const
 {
-    debugmsg("function print",LOGLEVEL_PRINT);
-
-    ASSERT(serial<registered_functions().size());
-
-    os << registered_functions()[serial].name;
-    printseq(os,'(',',',')',exprseq::precedence,function::precedence);
+	inherited::archive(n);
+	GINAC_ASSERT(serial < registered_functions().size());
+	n.add_string("name", registered_functions()[serial].name);
 }
 
-void function::printtree(ostream & os, unsigned indent) const
-{
-    debugmsg("function printtree",LOGLEVEL_PRINT);
-
-    ASSERT(serial<registered_functions().size());
+//////////
+// functions overriding virtual functions from base classes
+//////////
 
-    os << string(indent,' ') << "function "
-       << registered_functions()[serial].name
-       << ", hash=" << hashvalue << " (0x" << hex << hashvalue << dec << ")"
-       << ", flags=" << flags
-       << ", nops=" << nops() << endl;
-    for (int i=0; i<nops(); ++i) {
-        seq[i].printtree(os,indent+delta_indent);
-    }
-    os << string(indent+delta_indent,' ') << "=====" << endl;
-}
+// public
 
-void function::printcsrc(ostream & os, unsigned type, unsigned upper_precedence) const
+void function::print(const print_context & c, unsigned level) const
 {
-    debugmsg("function print csrc",LOGLEVEL_PRINT);
-
-    ASSERT(serial<registered_functions().size());
-
-	// Print function name in lowercase
-    string lname;
-    lname=registered_functions()[serial].name;
-    for (unsigned i=0; i<lname.size(); i++)
-        lname[i] = tolower(lname[i]);
-    os << lname << "(";
-
-	// Print arguments, separated by commas
-    exvector::const_iterator it = seq.begin();
-    exvector::const_iterator itend = seq.end();
-    while (it != itend) {
-        it->bp->printcsrc(os, type, 0);
-        it++;
-        if (it != itend)
-            os << ",";
-    }
-    os << ")";
+	GINAC_ASSERT(serial<registered_functions().size());
+
+	if (is_of_type(c, print_tree)) {
+
+		c.s << std::string(level, ' ') << class_name() << " "
+		    << registered_functions()[serial].name
+		    << std::hex << ", hash=0x" << hashvalue << ", flags=0x" << flags << std::dec
+		    << ", nops=" << nops()
+		    << std::endl;
+		unsigned delta_indent = static_cast<const print_tree &>(c).delta_indent;
+		for (unsigned i=0; i<seq.size(); ++i)
+			seq[i].print(c, level + delta_indent);
+		c.s << std::string(level + delta_indent, ' ') << "=====" << std::endl;
+
+	} else if (is_of_type(c, print_csrc)) {
+
+		// Print function name in lowercase
+		std::string lname = registered_functions()[serial].name;
+		unsigned num = lname.size();
+		for (unsigned i=0; i<num; i++)
+			lname[i] = tolower(lname[i]);
+		c.s << lname << "(";
+
+		// Print arguments, separated by commas
+		exvector::const_iterator it = seq.begin(), itend = seq.end();
+		while (it != itend) {
+			it->print(c);
+			++it;
+			if (it != itend)
+				c.s << ",";
+		}
+		c.s << ")";
+
+	} else if (is_of_type(c, print_latex)) {
+		c.s << registered_functions()[serial].TeX_name;
+		printseq(c, '(', ',', ')', exprseq::precedence(), function::precedence());
+	} else {
+		c.s << registered_functions()[serial].name;
+		printseq(c, '(', ',', ')', exprseq::precedence(), function::precedence());
+	}
 }
 
 ex function::expand(unsigned options) const
 {
-    return this->setflag(status_flags::expanded);
+	// Only expand arguments when asked to do so
+	if (options & expand_options::expand_function_args)
+		return inherited::expand(options);
+	else
+		return (options == 0) ? setflag(status_flags::expanded) : *this;
 }
 
 ex function::eval(int level) const
 {
-    ASSERT(serial<registered_functions().size());
-
-    exvector eseq=evalchildren(level);    
-
-    if (registered_functions()[serial].e==0) {
-        return function(serial,eseq).hold();
-    }
-    switch (registered_functions()[serial].nparams) {
-        // the following lines have been generated for max. ${maxargs} parameters
+	GINAC_ASSERT(serial<registered_functions().size());
+
+	if (level>1) {
+		// first evaluate children, then we will end up here again
+		return function(serial,evalchildren(level));
+	}
+
+	const function_options &opt = registered_functions()[serial];
+
+	// Canonicalize argument order according to the symmetry properties
+	if (seq.size() > 1 && !(opt.symtree.is_zero())) {
+		exvector v = seq;
+		GINAC_ASSERT(is_a<symmetry>(opt.symtree));
+		int sig = canonicalize(v.begin(), ex_to<symmetry>(opt.symtree));
+		if (sig != INT_MAX) {
+			// Something has changed while sorting arguments, more evaluations later
+			if (sig == 0)
+				return _ex0;
+			return ex(sig) * thisexprseq(v);
+		}
+	}
+
+	if (opt.eval_f==0) {
+		return this->hold();
+	}
+
+	bool use_remember = opt.use_remember;
+	ex eval_result;
+	if (use_remember && lookup_remember_table(eval_result)) {
+		return eval_result;
+	}
+	current_serial = serial;
+	if (registered_functions()[serial].eval_use_exvector_args)
+		eval_result = ((eval_funcp_exvector)(registered_functions()[serial].eval_f))(seq);
+	else
+	switch (opt.nparams) {
+		// the following lines have been generated for max. ${maxargs} parameters
 ${eval_switch_statement}
-        // end of generated lines
-    }
-    throw(std::logic_error("function::eval(): invalid nparams"));
+		// end of generated lines
+	default:
+		throw(std::logic_error("function::eval(): invalid nparams"));
+	}
+	if (use_remember) {
+		store_remember_table(eval_result);
+	}
+	return eval_result;
 }
 
 ex function::evalf(int level) const
 {
-    ASSERT(serial<registered_functions().size());
-
-    exvector eseq=evalfchildren(level);
-    
-    if (registered_functions()[serial].ef==0) {
-        return function(serial,eseq).hold();
-    }
-    switch (registered_functions()[serial].nparams) {
-        // the following lines have been generated for max. ${maxargs} parameters
+	GINAC_ASSERT(serial<registered_functions().size());
+
+	// Evaluate children first
+	exvector eseq;
+	if (level == 1)
+		eseq = seq;
+	else if (level == -max_recursion_level)
+		throw(std::runtime_error("max recursion level reached"));
+	else
+		eseq.reserve(seq.size());
+	--level;
+	exvector::const_iterator it = seq.begin(), itend = seq.end();
+	while (it != itend) {
+		eseq.push_back(it->evalf(level));
+		++it;
+	}
+	
+	if (registered_functions()[serial].evalf_f==0) {
+		return function(serial,eseq).hold();
+	}
+	current_serial = serial;
+	if (registered_functions()[serial].evalf_use_exvector_args)
+		return ((evalf_funcp_exvector)(registered_functions()[serial].evalf_f))(seq);
+	switch (registered_functions()[serial].nparams) {
+		// the following lines have been generated for max. ${maxargs} parameters
 ${evalf_switch_statement}
-        // end of generated lines
-    }
-    throw(std::logic_error("function::evalf(): invalid nparams"));
+		// end of generated lines
+	}
+	throw(std::logic_error("function::evalf(): invalid nparams"));
 }
 
-ex function::thisexprseq(exvector const & v) const
+unsigned function::calchash(void) const
 {
-    return function(serial,v);
+	unsigned v = golden_ratio_hash(golden_ratio_hash(tinfo()) ^ serial);
+	for (unsigned i=0; i<nops(); i++) {
+		v = rotate_left_31(v);
+		v ^= this->op(i).gethash();
+	}
+	v &= 0x7FFFFFFFU;
+	if (flags & status_flags::evaluated) {
+		setflag(status_flags::hash_calculated);
+		hashvalue = v;
+	}
+	return v;
+}
+
+ex function::thisexprseq(const exvector & v) const
+{
+	return function(serial,v);
 }
 
 ex function::thisexprseq(exvector * vp) const
 {
-    return function(serial,vp);
+	return function(serial,vp);
 }
 
 /** Implementation of ex::series for functions.
  *  \@see ex::series */
-ex function::series(symbol const & s, ex const & point, int order) const
+ex function::series(const relational & r, int order, unsigned options) const
 {
-    ASSERT(serial<registered_functions().size());
-
-    if (registered_functions()[serial].s==0) {
-        return basic::series(s, point, order);
-    }
-    switch (registered_functions()[serial].nparams) {
-        // the following lines have been generated for max. ${maxargs} parameters
+	GINAC_ASSERT(serial<registered_functions().size());
+
+	if (registered_functions()[serial].series_f==0) {
+		return basic::series(r, order);
+	}
+	ex res;
+	current_serial = serial;
+	if (registered_functions()[serial].series_use_exvector_args) {
+		try {
+			res = ((series_funcp_exvector)(registered_functions()[serial].series_f))(seq, r, order, options);
+		} catch (do_taylor) {
+			res = basic::series(r, order, options);
+		}
+		return res;
+	}
+	switch (registered_functions()[serial].nparams) {
+		// the following lines have been generated for max. ${maxargs} parameters
 ${series_switch_statement}
-        // end of generated lines
-    }
-    throw(std::logic_error("function::series(): invalid nparams"));
+		// end of generated lines
+	}
+	throw(std::logic_error("function::series(): invalid nparams"));
 }
 
 // protected
 
-int function::compare_same_type(basic const & other) const
+/** Implementation of ex::diff() for functions. It applies the chain rule,
+ *  except for the Order term function.
+ *  \@see ex::diff */
+ex function::derivative(const symbol & s) const
 {
-    ASSERT(is_of_type(other, function));
-    function const & o=static_cast<function &>(const_cast<basic &>(other));
+	ex result;
+
+	if (serial == function_index_Order) {
+		// Order Term function only differentiates the argument
+		return Order(seq[0].diff(s));
+	} else {
+		// Chain rule
+		ex arg_diff;
+		unsigned num = seq.size();
+		for (unsigned i=0; i<num; i++) {
+			arg_diff = seq[i].diff(s);
+			// We apply the chain rule only when it makes sense.  This is not
+			// just for performance reasons but also to allow functions to
+			// throw when differentiated with respect to one of its arguments
+			// without running into trouble with our automatic full
+			// differentiation:
+			if (!arg_diff.is_zero())
+				result += pderivative(i)*arg_diff;
+		}
+	}
+	return result;
+}
+
+int function::compare_same_type(const basic & other) const
+{
+	GINAC_ASSERT(is_of_type(other, function));
+	const function & o = static_cast<const function &>(other);
 
-    if (serial!=o.serial) {
-        return serial < o.serial ? -1 : 1;
-    }
-    return exprseq::compare_same_type(o);
+	if (serial != o.serial)
+		return serial < o.serial ? -1 : 1;
+	else
+		return exprseq::compare_same_type(o);
 }
 
-bool function::is_equal_same_type(basic const & other) const
+bool function::is_equal_same_type(const basic & other) const
 {
-    ASSERT(is_of_type(other, function));
-    function const & o=static_cast<function &>(const_cast<basic &>(other));
+	GINAC_ASSERT(is_of_type(other, function));
+	const function & o = static_cast<const function &>(other);
 
-    if (serial!=o.serial) return false;
-    return exprseq::is_equal_same_type(o);
+	if (serial != o.serial)
+		return false;
+	else
+		return exprseq::is_equal_same_type(o);
+}
+
+bool function::match_same_type(const basic & other) const
+{
+	GINAC_ASSERT(is_of_type(other, function));
+	const function & o = static_cast<const function &>(other);
+
+	return serial == o.serial;
 }
 
 unsigned function::return_type(void) const
 {
-    if (seq.size()==0) {
-        return return_types::commutative;
-    }
-    return (*seq.begin()).return_type();
+	if (seq.empty())
+		return return_types::commutative;
+	else
+		return seq.begin()->return_type();
 }
-   
+
 unsigned function::return_type_tinfo(void) const
 {
-    if (seq.size()==0) {
-        return tinfo_key;
-    }
-    return (*seq.begin()).return_type_tinfo();
+	if (seq.empty())
+		return tinfo_key;
+	else
+		return seq.begin()->return_type_tinfo();
 }
 
 //////////
@@ -589,45 +939,93 @@ unsigned function::return_type_tinfo(void) const
 
 // protected
 
-ex function::pdiff(unsigned diff_param) const // partial differentiation
+ex function::pderivative(unsigned diff_param) const // partial differentiation
 {
-    ASSERT(serial<registered_functions().size());
-    
-    if (registered_functions()[serial].d==0) {
-        throw(std::logic_error(string("function::pdiff(") + registered_functions()[serial].name + "): no diff function defined"));
-    }
-    switch (registered_functions()[serial].nparams) {
-        // the following lines have been generated for max. ${maxargs} parameters
+	GINAC_ASSERT(serial<registered_functions().size());
+	
+	// No derivative defined? Then return abstract derivative object
+	if (registered_functions()[serial].derivative_f == NULL)
+		return fderivative(serial, diff_param, seq);
+
+	current_serial = serial;
+	if (registered_functions()[serial].derivative_use_exvector_args)
+		return ((derivative_funcp_exvector)(registered_functions()[serial].derivative_f))(seq, diff_param);
+	switch (registered_functions()[serial].nparams) {
+		// the following lines have been generated for max. ${maxargs} parameters
 ${diff_switch_statement}
-        // end of generated lines
-    }        
-    throw(std::logic_error("function::pdiff(): no diff function defined"));
+		// end of generated lines
+	}
+	throw(std::logic_error("function::pderivative(): no diff function defined"));
 }
 
-vector<registered_function_info> & function::registered_functions(void)
+std::vector<function_options> & function::registered_functions(void)
 {
-    static vector<registered_function_info> * rf=new vector<registered_function_info>;
-    return *rf;
+	static std::vector<function_options> * rf = new std::vector<function_options>;
+	return *rf;
 }
 
-// public
+bool function::lookup_remember_table(ex & result) const
+{
+	return remember_table::remember_tables()[serial].lookup_entry(*this,result);
+}
 
-// the following lines have been generated for max. ${maxargs} parameters
-$register_new_implementation
-// end of generated lines
+void function::store_remember_table(ex const & result) const
+{
+	remember_table::remember_tables()[serial].add_entry(*this,result);
+}
 
-//////////
-// static member variables
-//////////
+// public
 
-// none
+unsigned function::register_new(function_options const & opt)
+{
+	unsigned same_name = 0;
+	for (unsigned i=0; i<registered_functions().size(); ++i) {
+		if (registered_functions()[i].name==opt.name) {
+			++same_name;
+		}
+	}
+	if (same_name>=opt.functions_with_same_name) {
+		// we do not throw an exception here because this code is
+		// usually executed before main(), so the exception could not
+		// caught anyhow
+		std::cerr << "WARNING: function name " << opt.name
+		          << " already in use!" << std::endl;
+	}
+	registered_functions().push_back(opt);
+	if (opt.use_remember) {
+		remember_table::remember_tables().
+			push_back(remember_table(opt.remember_size,
+			                         opt.remember_assoc_size,
+			                         opt.remember_strategy));
+	} else {
+		remember_table::remember_tables().push_back(remember_table());
+	}
+	return registered_functions().size()-1;
+}
 
-//////////
-// global constants
-//////////
+/** Find serial number of function by name and number of parameters.
+ *  Throws exception if function was not found. */
+unsigned function::find_function(const std::string &name, unsigned nparams)
+{
+	std::vector<function_options>::const_iterator i = function::registered_functions().begin(), end = function::registered_functions().end();
+	unsigned serial = 0;
+	while (i != end) {
+		if (i->get_name() == name && i->get_nparams() == nparams)
+			return serial;
+		++i;
+		++serial;
+	}
+	throw (std::runtime_error("no function '" + name + "' with " + ToString(nparams) + " parameters defined"));
+}
+
+/** Return the print name of the function. */
+std::string function::get_name(void) const
+{
+	GINAC_ASSERT(serial<registered_functions().size());
+	return registered_functions()[serial].name;
+}
 
-const function some_function;
-type_info const & typeid_function=typeid(some_function);
+} // namespace GiNaC
 
 END_OF_IMPLEMENTATION