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[ginac.git] / ginac / function.pl
index 4d19e6295897a3ed19b7d70e103d39de13e9fe7a..318e46c19bda4143f4f77908f19928de6cbdf203 100755 (executable)
@@ -1,4 +1,24 @@
-$maxargs=13;
+#  This perl script automatically generates function.h and function.cpp
+
+#  function.pl options: \$maxargs=${maxargs}
+# 
+#  GiNaC Copyright (C) 1999-2004 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
+#  the Free Software Foundation; either version 2 of the License, or
+#  (at your option) any later version.
+# 
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+# 
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software
+#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+$maxargs=14;
 
 sub generate_seq {
        my ($seq_template,$n)=@_;
@@ -40,6 +60,7 @@ $declare_function_macro = generate(
        <<'END_OF_DECLARE_FUNCTION_MACRO','typename T${N}','const T${N} & p${N}','GiNaC::ex(p${N})');
 #define DECLARE_FUNCTION_${N}P(NAME) \\
 class NAME##_SERIAL { public: static unsigned serial; }; \\
+const unsigned NAME##_NPARAMS = ${N}; \\
 template<${SEQ1}> const GiNaC::function NAME(${SEQ2}) { \\
        return GiNaC::function(NAME##_SERIAL::serial, ${SEQ3}); \\
 }
@@ -54,6 +75,10 @@ $typedef_evalf_funcp=generate(
 'typedef ex (* evalf_funcp_${N})(${SEQ1});'."\n",
 'const ex &','','');
 
+$typedef_conjugate_funcp=generate(
+'typedef ex (* conjugate_funcp_${N})(${SEQ1});'."\n",
+'const ex &','','');
+
 $typedef_derivative_funcp=generate(
 'typedef ex (* derivative_funcp_${N})(${SEQ1}, unsigned);'."\n",
 'const ex &','','');
@@ -62,14 +87,30 @@ $typedef_series_funcp=generate(
 'typedef ex (* series_funcp_${N})(${SEQ1}, const relational &, int, unsigned);'."\n",
 'const ex &','','');
 
+$typedef_print_funcp=generate(
+'typedef void (* print_funcp_${N})(${SEQ1}, const print_context &);'."\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",'','','');
 
+$conjugate_func_interface=generate('    function_options & conjugate_func(conjugate_funcp_${N} d);'."\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",'','','');
 
+$print_func_interface=generate(
+       <<'END_OF_PRINT_FUNC_INTERFACE','','','');
+    template <class Ctx> function_options & print_func(print_funcp_${N} p)
+    {
+       test_and_set_nparams(${N});
+       set_print_func(Ctx::get_class_info_static().options.get_id(), print_funcp(p));
+       return *this;
+    }
+END_OF_PRINT_FUNC_INTERFACE
+
 $constructors_interface=generate(
 '    function(unsigned ser, ${SEQ1});'."\n",
 'const ex & param${N}','','');
@@ -86,33 +127,46 @@ END_OF_CONSTRUCTORS_IMPLEMENTATION
 $eval_switch_statement=generate(
        <<'END_OF_EVAL_SWITCH_STATEMENT','seq[${N}-1]','','');
        case ${N}:
-               eval_result = ((eval_funcp_${N})(registered_functions()[serial].eval_f))(${SEQ1});
+               eval_result = ((eval_funcp_${N})(opt.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].evalf_f))(${SEQ1});
+               return ((evalf_funcp_${N})(opt.evalf_f))(${SEQ1});
 END_OF_EVALF_SWITCH_STATEMENT
 
+$conjugate_switch_statement=generate(
+       <<'END_OF_DIFF_SWITCH_STATEMENT','seq[${N}-1]','','');
+       case ${N}:
+               return ((conjugate_funcp_${N})(opt.conjugate_f))(${SEQ1});
+END_OF_DIFF_SWITCH_STATEMENT
+
 $diff_switch_statement=generate(
        <<'END_OF_DIFF_SWITCH_STATEMENT','seq[${N}-1]','','');
        case ${N}:
-               return ((derivative_funcp_${N})(registered_functions()[serial].derivative_f))(${SEQ1},diff_param);
+               return ((derivative_funcp_${N})(opt.derivative_f))(${SEQ1},diff_param);
 END_OF_DIFF_SWITCH_STATEMENT
 
 $series_switch_statement=generate(
        <<'END_OF_SERIES_SWITCH_STATEMENT','seq[${N}-1]','','');
        case ${N}:
                try {
-                       res = ((series_funcp_${N})(registered_functions()[serial].series_f))(${SEQ1},r,order,options);
+                       res = ((series_funcp_${N})(opt.series_f))(${SEQ1},r,order,options);
                } catch (do_taylor) {
                        res = basic::series(r, order, options);
                }
                return res;
 END_OF_SERIES_SWITCH_STATEMENT
 
+$print_switch_statement=generate(
+       <<'END_OF_PRINT_SWITCH_STATEMENT','seq[${N}-1]','','');
+               case ${N}:
+                       ((print_funcp_${N})(pdt[id]))(${SEQ1}, c);
+                       break;
+END_OF_PRINT_SWITCH_STATEMENT
+
 $eval_func_implementation=generate(
        <<'END_OF_EVAL_FUNC_IMPLEMENTATION','','','');
 function_options & function_options::eval_func(eval_funcp_${N} e)
@@ -133,6 +187,16 @@ function_options & function_options::evalf_func(evalf_funcp_${N} ef)
 }
 END_OF_EVALF_FUNC_IMPLEMENTATION
 
+$conjugate_func_implementation=generate(
+       <<'END_OF_CONJUGATE_FUNC_IMPLEMENTATION','','','');
+function_options & function_options::conjugate_func(conjugate_funcp_${N} c)
+{
+       test_and_set_nparams(${N});
+       conjugate_f = conjugate_funcp(c);
+       return *this;
+}
+END_OF_CONJUGATE_FUNC_IMPLEMENTATION
+
 $derivative_func_implementation=generate(
        <<'END_OF_DERIVATIVE_FUNC_IMPLEMENTATION','','','');
 function_options & function_options::derivative_func(derivative_funcp_${N} d)
@@ -163,7 +227,7 @@ $interface=<<END_OF_INTERFACE;
  *  Please do not modify it directly, edit the perl script instead!
  *  function.pl options: \$maxargs=${maxargs}
  *
- *  GiNaC Copyright (C) 1999-2003 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2004 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
@@ -197,7 +261,7 @@ $declare_function_macro
 
 #define REGISTER_FUNCTION(NAME,OPT) \\
 unsigned NAME##_SERIAL::serial = \\
-       GiNaC::function::register_new(GiNaC::function_options(#NAME).OPT);
+       GiNaC::function::register_new(GiNaC::function_options(#NAME, NAME##_NPARAMS).OPT);
 
 namespace GiNaC {
 
@@ -206,22 +270,28 @@ class symmetry;
 
 typedef ex (* eval_funcp)();
 typedef ex (* evalf_funcp)();
+typedef ex (* conjugate_funcp)();
 typedef ex (* derivative_funcp)();
 typedef ex (* series_funcp)();
+typedef void (* print_funcp)();
 
 // the following lines have been generated for max. ${maxargs} parameters
 $typedef_eval_funcp
 $typedef_evalf_funcp
+$typedef_conjugate_funcp
 $typedef_derivative_funcp
 $typedef_series_funcp
+$typedef_print_funcp
 // end of generated lines
 
 // 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 (* conjugate_funcp_exvector)(const exvector &);
 typedef ex (* derivative_funcp_exvector)(const exvector &, unsigned);
 typedef ex (* series_funcp_exvector)(const exvector &, const relational &, int, unsigned);
+typedef void (* print_funcp_exvector)(const exvector &, const print_context &);
 
 
 class function_options
@@ -231,33 +301,49 @@ class function_options
 public:
        function_options();
        function_options(std::string const & n, std::string const & tn=std::string());
+       function_options(std::string const & n, unsigned np);
        ~function_options();
        void initialize();
+
+       function_options & dummy() { return *this; }
        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
 $evalf_func_interface
+$conjugate_func_interface
 $derivative_func_interface
 $series_func_interface
+$print_func_interface
 // end of generated lines
        function_options & eval_func(eval_funcp_exvector e);
        function_options & evalf_func(evalf_funcp_exvector ef);
+       function_options & conjugate_func(conjugate_funcp_exvector d);
        function_options & derivative_func(derivative_funcp_exvector d);
        function_options & series_func(series_funcp_exvector s);
 
+       template <class Ctx> function_options & print_func(print_funcp_exvector p)
+       {
+               print_use_exvector_args = true;
+               set_print_func(Ctx::get_class_info_static().options.get_id(), print_funcp(p));
+               return *this;
+       }
+
        function_options & set_return_type(unsigned rt, unsigned rtt=0);
        function_options & do_not_evalf_params();
        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() const { return name; }
        unsigned get_nparams() const { return nparams; }
-       bool has_derivative() const { return derivative_f != NULL; }
 
 protected:
+       bool has_derivative() const { return derivative_f != NULL; }
+       void test_and_set_nparams(unsigned n);
+       void set_print_func(unsigned id, print_funcp f);
+
        std::string name;
        std::string TeX_name;
 
@@ -265,8 +351,10 @@ protected:
 
        eval_funcp eval_f;
        evalf_funcp evalf_f;
+       conjugate_funcp conjugate_f;
        derivative_funcp derivative_f;
        series_funcp series_f;
+       std::vector<print_funcp> print_dispatch_table;
 
        bool evalf_params_first;
 
@@ -281,8 +369,10 @@ protected:
 
        bool eval_use_exvector_args;
        bool evalf_use_exvector_args;
+       bool conjugate_use_exvector_args;
        bool derivative_use_exvector_args;
        bool series_use_exvector_args;
+       bool print_use_exvector_args;
 
        unsigned functions_with_same_name;
 
@@ -320,7 +410,7 @@ $constructors_interface
        // 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
+       function(unsigned ser, std::auto_ptr<exvector> vp);
 
        // functions overriding virtual functions from base classes
 public:
@@ -332,7 +422,8 @@ public:
        unsigned calchash() const;
        ex series(const relational & r, int order, unsigned options = 0) const;
        ex thiscontainer(const exvector & v) const;
-       ex thiscontainer(exvector * vp) const;
+       ex thiscontainer(std::auto_ptr<exvector> vp) const;
+       ex conjugate() const;
 protected:
        ex derivative(const symbol & s) const;
        bool is_equal_same_type(const basic & other) const;
@@ -396,7 +487,7 @@ $implementation=<<END_OF_IMPLEMENTATION;
  *  Please do not modify it directly, edit the perl script instead!
  *  function.pl options: \$maxargs=${maxargs}
  *
- *  GiNaC Copyright (C) 1999-2003 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2004 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
@@ -445,7 +536,14 @@ function_options::function_options()
 function_options::function_options(std::string const & n, std::string const & tn)
 {
        initialize();
-       set_name(n,tn);
+       set_name(n, tn);
+}
+
+function_options::function_options(std::string const & n, unsigned np)
+{
+       initialize();
+       set_name(n, std::string());
+       nparams = np;
 }
 
 function_options::~function_options()
@@ -455,15 +553,17 @@ function_options::~function_options()
 
 void function_options::initialize()
 {
-       set_name("unnamed_function","\\\\mbox{unnamed}");
+       set_name("unnamed_function", "\\\\mbox{unnamed}");
        nparams = 0;
-       eval_f = evalf_f = derivative_f = series_f = 0;
+       eval_f = evalf_f = conjugate_f = derivative_f = series_f = 0;
        evalf_params_first = true;
        use_return_type = false;
        eval_use_exvector_args = false;
        evalf_use_exvector_args = false;
+       conjugate_use_exvector_args = false;
        derivative_use_exvector_args = false;
        series_use_exvector_args = false;
+       print_use_exvector_args = false;
        use_remember = false;
        functions_with_same_name = 1;
        symtree = 0;
@@ -489,6 +589,7 @@ function_options & function_options::latex_name(std::string const & tn)
 // the following lines have been generated for max. ${maxargs} parameters
 $eval_func_implementation
 $evalf_func_implementation
+$conjugate_func_implementation
 $derivative_func_implementation
 $series_func_implementation
 // end of generated lines
@@ -505,6 +606,12 @@ function_options& function_options::evalf_func(evalf_funcp_exvector ef)
        evalf_f = evalf_funcp(ef);
        return *this;
 }
+function_options& function_options::conjugate_func(conjugate_funcp_exvector c)
+{
+       conjugate_use_exvector_args = true;
+       conjugate_f = conjugate_funcp(c);
+       return *this;
+}
 function_options& function_options::derivative_func(derivative_funcp_exvector d)
 {
        derivative_use_exvector_args = true;
@@ -562,13 +669,20 @@ void function_options::test_and_set_nparams(unsigned 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
+               // be caught anyhow
                std::cerr << "WARNING: " << name << "(): number of parameters ("
                          << n << ") differs from number set before (" 
                          << nparams << ")" << std::endl;
        }
 }
 
+void function_options::set_print_func(unsigned id, print_funcp f)
+{
+       if (id >= print_dispatch_table.size())
+               print_dispatch_table.resize(id + 1);
+       print_dispatch_table[id] = f;
+}
+
 /** This can be used as a hook for external applications. */
 unsigned function::current_serial = 0;
 
@@ -616,7 +730,7 @@ function::function(unsigned ser, const exvector & v, bool discardable)
        tinfo_key = TINFO_function;
 }
 
-function::function(unsigned ser, exvector * vp) 
+function::function(unsigned ser, std::auto_ptr<exvector> vp) 
   : exprseq(vp), serial(ser)
 {
        tinfo_key = TINFO_function;
@@ -669,44 +783,67 @@ void function::archive(archive_node &n) const
 void function::print(const print_context & c, unsigned level) const
 {
        GINAC_ASSERT(serial<registered_functions().size());
+       const function_options &opt = registered_functions()[serial];
+       const std::vector<print_funcp> &pdt = opt.print_dispatch_table;
 
-       if (is_a<print_tree>(c)) {
-
-               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 (size_t i=0; i<seq.size(); ++i)
-                       seq[i].print(c, level + delta_indent);
-               c.s << std::string(level + delta_indent, ' ') << "=====" << std::endl;
+       // Dynamically dispatch on print_context type
+       const print_context_class_info *pc_info = &c.get_class_info();
 
-       } else if (is_a<print_csrc>(c)) {
+next_context:
+       unsigned id = pc_info->options.get_id();
+       if (id >= pdt.size() || pdt[id] == NULL) {
 
-               // Print function name in lowercase
-               std::string lname = registered_functions()[serial].name;
-               size_t num = lname.size();
-               for (size_t i=0; i<num; i++)
-                       lname[i] = tolower(lname[i]);
-               c.s << lname << "(";
+               // Method not found, try parent print_context class
+               const print_context_class_info *parent_pc_info = pc_info->get_parent();
+               if (parent_pc_info) {
+                       pc_info = parent_pc_info;
+                       goto next_context;
+               }
 
-               // 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 << ",";
+               // Method still not found, use default output
+               if (is_a<print_tree>(c)) {
+
+                       c.s << std::string(level, ' ') << class_name() << " "
+                           << opt.name << " @" << this
+                           << 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 (size_t 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_a<print_csrc>(c)) {
+
+                       // Print function name in lowercase
+                       std::string lname = opt.name;
+                       size_t num = lname.size();
+                       for (size_t i=0; i<num; i++)
+                               lname[i] = tolower(lname[i]);
+                       c.s << lname;
+                       printseq(c, '(', ',', ')', exprseq::precedence(), function::precedence());
+
+               } else if (is_a<print_latex>(c)) {
+                       c.s << opt.TeX_name;
+                       printseq(c, '(', ',', ')', exprseq::precedence(), function::precedence());
+               } else {
+                       c.s << opt.name;
+                       printseq(c, '(', ',', ')', exprseq::precedence(), function::precedence());
                }
-               c.s << ")";
 
-       } else if (is_a<print_latex>(c)) {
-               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());
+
+               // Method found, call it
+               current_serial = serial;
+               if (opt.print_use_exvector_args)
+                       ((print_funcp_exvector)pdt[id])(seq, c);
+               else switch (opt.nparams) {
+                       // the following lines have been generated for max. ${maxargs} parameters
+${print_switch_statement}
+                       // end of generated lines
+               default:
+                       throw(std::logic_error("function::print(): invalid nparams"));
+               }
        }
 }
 
@@ -721,13 +858,12 @@ ex function::expand(unsigned options) const
 
 ex function::eval(int level) const
 {
-       GINAC_ASSERT(serial<registered_functions().size());
-
        if (level>1) {
                // first evaluate children, then we will end up here again
                return function(serial,evalchildren(level));
        }
 
+       GINAC_ASSERT(serial<registered_functions().size());
        const function_options &opt = registered_functions()[serial];
 
        // Canonicalize argument order according to the symmetry properties
@@ -753,8 +889,8 @@ ex function::eval(int level) const
                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);
+       if (opt.eval_use_exvector_args)
+               eval_result = ((eval_funcp_exvector)(opt.eval_f))(seq);
        else
        switch (opt.nparams) {
                // the following lines have been generated for max. ${maxargs} parameters
@@ -772,7 +908,6 @@ ${eval_switch_statement}
 ex function::evalf(int level) const
 {
        GINAC_ASSERT(serial<registered_functions().size());
-
        const function_options &opt = registered_functions()[serial];
 
        // Evaluate children first
@@ -822,12 +957,12 @@ unsigned function::calchash() const
 
 ex function::thiscontainer(const exvector & v) const
 {
-       return function(serial,v);
+       return function(serial, v);
 }
 
-ex function::thiscontainer(exvector * vp) const
+ex function::thiscontainer(std::auto_ptr<exvector> vp) const
 {
-       return function(serial,vp);
+       return function(serial, vp);
 }
 
 /** Implementation of ex::series for functions.
@@ -835,21 +970,22 @@ ex function::thiscontainer(exvector * vp) const
 ex function::series(const relational & r, int order, unsigned options) const
 {
        GINAC_ASSERT(serial<registered_functions().size());
+       const function_options &opt = registered_functions()[serial];
 
-       if (registered_functions()[serial].series_f==0) {
+       if (opt.series_f==0) {
                return basic::series(r, order);
        }
        ex res;
        current_serial = serial;
-       if (registered_functions()[serial].series_use_exvector_args) {
+       if (opt.series_use_exvector_args) {
                try {
-                       res = ((series_funcp_exvector)(registered_functions()[serial].series_f))(seq, r, order, options);
+                       res = ((series_funcp_exvector)(opt.series_f))(seq, r, order, options);
                } catch (do_taylor) {
                        res = basic::series(r, order, options);
                }
                return res;
        }
-       switch (registered_functions()[serial].nparams) {
+       switch (opt.nparams) {
                // the following lines have been generated for max. ${maxargs} parameters
 ${series_switch_statement}
                // end of generated lines
@@ -857,6 +993,28 @@ ${series_switch_statement}
        throw(std::logic_error("function::series(): invalid nparams"));
 }
 
+/** Implementation of ex::conjugate for functions. */
+ex function::conjugate() const
+{
+       GINAC_ASSERT(serial<registered_functions().size());
+       const function_options & opt = registered_functions()[serial];
+
+       if (opt.conjugate_f==0) {
+               return exprseq::conjugate();
+       }
+
+       if (opt.conjugate_use_exvector_args) {
+               return ((conjugate_funcp_exvector)(opt.conjugate_f))(seq);
+       }
+
+       switch (opt.nparams) {
+               // the following lines have been generated for max. ${maxargs} parameters
+${conjugate_switch_statement}
+               // end of generated lines
+       }
+       throw(std::logic_error("function::conjugate(): invalid nparams"));
+}
+
 // protected
 
 /** Implementation of ex::diff() for functions. It applies the chain rule,
@@ -919,6 +1077,7 @@ bool function::match_same_type(const basic & other) const
 
 unsigned function::return_type() const
 {
+       GINAC_ASSERT(serial<registered_functions().size());
        const function_options &opt = registered_functions()[serial];
 
        if (opt.use_return_type) {
@@ -936,6 +1095,7 @@ unsigned function::return_type() const
 
 unsigned function::return_type_tinfo() const
 {
+       GINAC_ASSERT(serial<registered_functions().size());
        const function_options &opt = registered_functions()[serial];
 
        if (opt.use_return_type) {
@@ -966,15 +1126,16 @@ unsigned function::return_type_tinfo() const
 ex function::pderivative(unsigned diff_param) const // partial differentiation
 {
        GINAC_ASSERT(serial<registered_functions().size());
+       const function_options &opt = registered_functions()[serial];
        
        // No derivative defined? Then return abstract derivative object
-       if (registered_functions()[serial].derivative_f == NULL)
+       if (opt.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) {
+       if (opt.derivative_use_exvector_args)
+               return ((derivative_funcp_exvector)(opt.derivative_f))(seq, diff_param);
+       switch (opt.nparams) {
                // the following lines have been generated for max. ${maxargs} parameters
 ${diff_switch_statement}
                // end of generated lines
@@ -990,12 +1151,12 @@ std::vector<function_options> & function::registered_functions()
 
 bool function::lookup_remember_table(ex & result) const
 {
-       return remember_table::remember_tables()[serial].lookup_entry(*this,result);
+       return remember_table::remember_tables()[this->serial].lookup_entry(*this,result);
 }
 
 void function::store_remember_table(ex const & result) const
 {
-       remember_table::remember_tables()[serial].add_entry(*this,result);
+       remember_table::remember_tables()[this->serial].add_entry(*this,result);
 }
 
 // public