Finalize 1.7.6 release.

[ginac.git] / ginac / fderivative.cpp

diff --git a/ginac/fderivative.cpp b/ginac/fderivative.cpp
index 9e3c981a78c9c0629b301fc67b5fbe95dbfd0e99..3ed3c90a811a7a36648cbd83db1651c0cd030821 100644 (file)
--- 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) 1999-2019 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