X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Ffderivative.cpp;h=c2160296f79f7e76d0baa841e2f41302004f4720;hp=17817e108671ffd4bc612ee343d78937455e2c49;hb=HEAD;hpb=6c946d4c762f5a0d6a3b742f03556dd018d63886

diff --git a/ginac/fderivative.cpp b/ginac/fderivative.cpp
index 17817e10..1bc31063 100644
--- a/ginac/fderivative.cpp
+++ b/ginac/fderivative.cpp
@@ -3,7 +3,7 @@
  *  Implementation of abstract derivatives of functions. */
 
 /*
- *  GiNaC Copyright (C) 1999-2015 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2024 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
@@ -31,6 +31,7 @@ namespace GiNaC {
 
 GINAC_IMPLEMENT_REGISTERED_CLASS_OPT(fderivative, function,
   print_func<print_context>(&fderivative::do_print).
+  print_func<print_latex>(&fderivative::do_print_latex).
   print_func<print_csrc>(&fderivative::do_print_csrc).
   print_func<print_tree>(&fderivative::do_print_tree))
 
@@ -81,7 +82,7 @@ GINAC_BIND_UNARCHIVER(fderivative);
 void fderivative::archive(archive_node &n) const
 {
 	inherited::archive(n);
-	paramset::const_iterator i = parameter_set.begin(), end = parameter_set.end();
+	auto i = parameter_set.begin(), end = parameter_set.end();
 	while (i != end) {
 		n.add_unsigned("param", *i);
 		++i;
@@ -102,7 +103,7 @@ void fderivative::print(const print_context & c, unsigned level) const
 void fderivative::do_print(const print_context & c, unsigned level) const
 {
 	c.s << "D[";
-	paramset::const_iterator i = parameter_set.begin(), end = parameter_set.end();
+	auto i = parameter_set.begin(), end = parameter_set.end();
 	--end;
 	while (i != end) {
 		c.s << *i++ << ",";
@@ -111,10 +112,27 @@ void fderivative::do_print(const print_context & c, unsigned level) const
 	printseq(c, '(', ',', ')', exprseq::precedence(), function::precedence());
 }
 
+void fderivative::do_print_latex(const print_context & c, unsigned level) const
+{
+	int order=1;
+	c.s << "\\partial_{";
+	auto i = parameter_set.begin(), end = parameter_set.end();
+	--end;
+	while (i != end) {
+		++order;
+		c.s << *i++ << ",";
+	}
+	c.s << *i << "}";
+	if (order>1)
+		c.s << "^{" << order << "}";
+	c.s << "(" << registered_functions()[serial].TeX_name << ")";
+	printseq(c, '(', ',', ')', exprseq::precedence(), function::precedence());
+}
+
 void fderivative::do_print_csrc(const print_csrc & c, unsigned level) const
 {
 	c.s << "D_";
-	paramset::const_iterator i = parameter_set.begin(), end = parameter_set.end();
+	auto i = parameter_set.begin(), end = parameter_set.end();
 	--end;
 	while (i != end)
 		c.s << *i++ << "_";
@@ -129,13 +147,13 @@ void fderivative::do_print_tree(const print_tree & c, unsigned level) const
 	    << std::hex << ", hash=0x" << hashvalue << ", flags=0x" << flags << std::dec
 	    << ", nops=" << nops()
 	    << ", params=";
-	paramset::const_iterator i = parameter_set.begin(), end = parameter_set.end();
+	auto i = parameter_set.begin(), end = parameter_set.end();
 	--end;
 	while (i != end)
 		c.s << *i++ << ",";
 	c.s << *i << std::endl;
-	for (size_t i=0; i<seq.size(); ++i)
-		seq[i].print(c, level + c.delta_indent);
+	for (auto & i : seq)
+		i.print(c, level + c.delta_indent);
 	c.s << std::string(level + c.delta_indent, ' ') << "=====" << std::endl;
 }
 
@@ -152,13 +170,6 @@ ex fderivative::eval() const
 	return this->hold();
 }
 
-/** Numeric evaluation falls back to evaluation of arguments.
- *  @see basic::evalf */
-ex fderivative::evalf(int level) const
-{
-	return basic::evalf(level);
-}
-
 /** The series expansion of derivatives falls back to Taylor expansion.
  *  @see basic::series */
 ex fderivative::series(const relational & r, int order, unsigned options) const
@@ -222,4 +233,20 @@ bool fderivative::match_same_type(const basic & other) const
 	return parameter_set == o.parameter_set && inherited::match_same_type(other);
 }
 
+/** Expose this object's derivative structure.
+ *
+ *  Parameter numbers occurring more than once stand for repeated
+ *  differentiation with respect to that parameter. If a symbolic function
+ *  f(x,y) is differentiated with respect to x, this method will return {0}.
+ *  If f(x,y) is differentiated twice with respect to y, it will return {1,1}.
+ *  (This corresponds to the way this object is printed.)
+ *
+ *  @return  multiset of function's parameter numbers that are abstractly
+ *  differentiated. */
+const paramset& fderivative::derivatives() const
+{
+	return parameter_set;
+}
+
+
 } // namespace GiNaC