Fix scoped type variables for expression type signatures

[ghc-hetmet.git] / compiler / basicTypes / VarEnv.lhs

diff --git a/compiler/basicTypes/VarEnv.lhs b/compiler/basicTypes/VarEnv.lhs
index dba4ec0..e59c800 100644 (file)
--- a/compiler/basicTypes/VarEnv.lhs
+++ b/compiler/basicTypes/VarEnv.lhs
@@ -20,7 +20,8 @@ module VarEnv (
 
        -- InScopeSet
        InScopeSet, emptyInScopeSet, mkInScopeSet, delInScopeSet,
-       extendInScopeSet, extendInScopeSetList, modifyInScopeSet,
+       extendInScopeSet, extendInScopeSetList, extendInScopeSetSet, 
+       modifyInScopeSet,
        getInScopeVars, lookupInScope, elemInScopeSet, uniqAway, 
        mapInScopeSet,
 
@@ -80,6 +81,10 @@ extendInScopeSetList (InScope in_scope n) vs
    = InScope (foldl (\s v -> extendVarEnv s v v) in_scope vs)
                    (n +# iUnbox (length vs))
 
+extendInScopeSetSet :: InScopeSet -> VarEnv Var -> InScopeSet
+extendInScopeSetSet (InScope in_scope n) vs
+   = InScope (in_scope `plusVarEnv` vs) (n +# iUnbox (sizeUFM vs))
+
 modifyInScopeSet :: InScopeSet -> Var -> Var -> InScopeSet
 -- Exploit the fact that the in-scope "set" is really a map
 --     Make old_v map to new_v