- 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 48903e45ffa5b82737142643543e3776367fc6e8..eb273c71b7da3ec710d5423a3bd2e3fb553a8f0f 100644 (file)
--- a/ginac/color.h
+++ b/ginac/color.h
@@ -157,6 +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);