build: accept both python 3 and python 2

[ginac.git] / ginac / fderivative.h

diff --git a/ginac/fderivative.h b/ginac/fderivative.h
index fe7abe81385a7fe842562c8245f225539c340b03..481ac0e29be7f8d11a52e3ed37585dfd290303b4 100644 (file)
--- a/ginac/fderivative.h
+++ b/ginac/fderivative.h
@@ -3,7 +3,7 @@
  *  Interface to abstract derivatives of functions. */
 
 /*
- *  GiNaC Copyright (C) 1999-2016 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2020 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
@@ -76,6 +76,7 @@ public:
        const paramset& derivatives() const;
 protected:
        void do_print(const print_context & c, unsigned level) const;
+       void do_print_latex(const print_context & c, unsigned level) const;
        void do_print_csrc(const print_csrc & c, unsigned level) const;
        void do_print_tree(const print_tree & c, unsigned level) const;