add patch::symmetry_ghost_zone_on_edge()

for symmetry with patch::interpatch_ghost_zone_on_edge()
and because it's useful in patch_system::synchronize_Jacobian() et al


git-svn-id: http://svn.einsteintoolkit.org/cactus/EinsteinAnalysis/AHFinderDirect/trunk@684 f88db872-0e4f-0410-b76b-b9085cfa78c5

1 files changed, 5 insertions, 2 deletions

diff --git a/src/patch/patch.hh b/src/patch/patch.hh
index 6325dfe..3724188 100644
--- a/src/patch/patch.hh
+++ b/src/patch/patch.hh
@@ -345,8 +345,11 @@ public:
 		const;
 
 	// get ghost zone on specified edge,
-	// assert() that it is indeed interpatch,
-	// static_cast<> to interpatch_ghost_zone ptr
+	// assert() that it is indeed of the specified type,
+	// static_cast<> to {symmetry,interpatch}_ghost_zone&
+	symmetry_ghost_zone& symmetry_ghost_zone_on_edge
+		(const patch_edge &e)
+		const;
 	interpatch_ghost_zone& interpatch_ghost_zone_on_edge
 		(const patch_edge &e)
 		const;