- dirac_trace() takes an optional third argument: the expression to use for

[ginac.git] / ginac / color.h

diff --git a/ginac/color.h b/ginac/color.h
index 700493253adad38b154c6040586753b7f6465861..eb273c71b7da3ec710d5423a3bd2e3fb553a8f0f 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
@@ -156,6 +157,7 @@ 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 e Expression to take the trace of
  *  @param rl Representation label */
 ex color_trace(const ex & e, unsigned char rl = 0);