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-rw-r--r--src-3.0/GF/Compile/BackOpt.hs9
1 files changed, 6 insertions, 3 deletions
diff --git a/src-3.0/GF/Compile/BackOpt.hs b/src-3.0/GF/Compile/BackOpt.hs
index 0043d02d8..2814448b4 100644
--- a/src-3.0/GF/Compile/BackOpt.hs
+++ b/src-3.0/GF/Compile/BackOpt.hs
@@ -27,7 +27,10 @@ import Data.List
import qualified GF.Infra.Modules as M
import qualified Data.ByteString.Char8 as BS
-type OptSpec = [Optimization]
+import Data.Set (Set)
+import qualified Data.Set as Set
+
+type OptSpec = Set Optimization
shareModule :: OptSpec -> (Ident, SourceModInfo) -> (Ident, SourceModInfo)
shareModule opt (i,m) = case m of
@@ -42,8 +45,8 @@ shareInfo _ i = i
-- the function putting together optimizations
shareOptim :: OptSpec -> Ident -> Term -> Term
-shareOptim opt c = (if OptValues `elem` opt then values else id)
- . (if OptParametrize `elem` opt then factor c 0 else id)
+shareOptim opt c = (if OptValues `Set.member` opt then values else id)
+ . (if OptParametrize `Set.member` opt then factor c 0 else id)
-- do even more: factor parametric branches