X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fcolor.h;h=9d9ba26e88e1e540b914f24185e2814e27493bd7;hp=a585f2e575f3b08af460b80f70329a3f1826c8dc;hb=ea5d361d94e49ca3f3b73db8c9812ee519f0633f;hpb=6715b097ae926fecfc62e53d4af38b7217634908

diff --git a/ginac/color.h b/ginac/color.h
index a585f2e5..9d9ba26e 100644
--- 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;
 };