GRHydro: add option to automatically use Evolution_Mask if possible

From: Roland Haas <rhaas@tapir.caltech.edu>

git-svn-id: http://svn.einsteintoolkit.org/cactus/EinsteinEvolve/GRHydro/trunk@469 c83d129a-5a75-4d5a-9c4d-ed3a5855bf45

1 files changed, 5 insertions, 2 deletions

diff --git a/param.ccl b/param.ccl
index 6e2f9e5..1ebcd58 100644
--- a/param.ccl
+++ b/param.ccl
@@ -83,9 +83,12 @@ USES REAL poly_k
 
 restricted:
 
-BOOLEAN use_evolution_mask "Set this to 'true' to skip validity tests in regions where CarpetEvolutionMask::evolution_mask vanishes." STEERABLE=ALWAYS
+KEYWORD use_evolution_mask "Set this to 'true' to skip validity tests in regions where CarpetEvolutionMask::evolution_mask vanishes." STEERABLE=ALWAYS
 {
-} "false"
+  "always" :: "use the mask"
+  "auto"   :: "check if CarpetEvolutionMask is active, then use the mask"
+  "never"  :: "do not use the mask"
+} "never"
 
 BOOLEAN GRHydro_enable_internal_excision "Set this to 'false' to disable the thorn-internal excision." STEERABLE=ALWAYS
 {