improve comment

From-SVN: r39806

diff --git a/gcc/cp/call.c b/gcc/cp/call.c
index d3e5ff39e534dfb5f0850e77c00a417ae3d1a7bc..f11929b095ef6304eea7d79fef98e75f1ae8c913 100644 (file)
--- a/gcc/cp/call.c
+++ b/gcc/cp/call.c
@@ -5212,7 +5212,12 @@ joust (cand1, cand2, warn)
       winner = more_specialized
         (TI_TEMPLATE (cand1->template), TI_TEMPLATE (cand2->template),
          DEDUCE_ORDER,
-         /* Never do unification on the 'this' parameter.  */
+         /* Tell the deduction code how many real function arguments we saw,
+           not counting the implicit 'this' argument.
+
+           [temp.func.order]: The presence of unused ellipsis and default
+           arguments has no effect on the partial ordering of function
+           templates.  */
          TREE_VEC_LENGTH (cand1->convs)
          - DECL_NONSTATIC_MEMBER_FUNCTION_P (cand1->fn));
       if (winner)