- color and clifford classes are quite functional now

[ginac.git] / ginac / color.h

diff --git a/ginac/color.h b/ginac/color.h
index 9a89387cbadcce0bca0c838a8ed30f05c245b893..48903e45ffa5b82737142643543e3776367fc6e8 100644 (file)
--- a/ginac/color.h
+++ b/ginac/color.h
@@ -85,6 +85,7 @@ class su3t : public tensor
        // functions overriding virtual functions from bases classes
 public:
        void print(const print_context & c, unsigned level = 0) const;
+       bool contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const;
 };
 
 /** This class represents the tensor of antisymmetric su(3) structure
@@ -153,6 +154,12 @@ ex color_d(const ex & a, const ex & b, const ex & c);
 /** This returns the linear combination d.a.b.c+I*f.a.b.c. */
 ex color_h(const ex & a, const ex & b, const ex & c);
 
+/** Calculate the trace of an expression containing color objects with a
+ *  specified representation label.
+ *
+ *  @param rl Representation label */
+ex color_trace(const ex & e, unsigned char rl = 0);
+
 
 } // namespace GiNaC