Index renaming issues, sped up simplify_indexed, used defined NC-objects

[ginac.git] / ginac / color.h

diff --git a/ginac/color.h b/ginac/color.h
index a585f2e575f3b08af460b80f70329a3f1826c8dc..9d9ba26e88e1e540b914f24185e2814e27493bd7 100644 (file)
--- a/ginac/color.h
+++ b/ginac/color.h
@@ -109,6 +109,7 @@ public:
 
        // non-virtual functions in this class
 protected:
+       unsigned return_type() const { return return_types::commutative; }
        void do_print(const print_context & c, unsigned level) const;
        void do_print_latex(const print_latex & c, unsigned level) const;
 };
@@ -125,6 +126,7 @@ public:
 
        // non-virtual functions in this class
 protected:
+       unsigned return_type() const { return return_types::commutative; }
        void do_print(const print_context & c, unsigned level) const;
        void do_print_latex(const print_latex & c, unsigned level) const;
 };