X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Ffderivative.cpp;h=30157c44d5a7d949d6a253c50a79218a18838fc2;hp=9e3c981a78c9c0629b301fc67b5fbe95dbfd0e99;hb=f62443c1f2c678be0b6ff6ce58618f6e3b4cdfa8;hpb=9413cd14faaf2980de3884915e22a5beda068ecc;ds=sidebyside

diff --git a/ginac/fderivative.cpp b/ginac/fderivative.cpp
index 9e3c981a..30157c44 100644
--- a/ginac/fderivative.cpp
+++ b/ginac/fderivative.cpp
@@ -3,7 +3,7 @@
  *  Implementation of abstract derivatives of functions. */
 
 /*
- *  GiNaC Copyright (C) 1999-2016 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2017 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))
 
@@ -111,6 +112,23 @@ 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_";
@@ -215,4 +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