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Define local modification to the environment.

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Rob Rix 2018-02-28 10:42:27 -05:00
parent 55a2b3f8dc
commit 6ad1d024f2
1 changed files with 3 additions and 0 deletions
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src/Analysis/Abstract/Evaluator.hs
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@ -21,6 +21,9 @@ modifyGlobalEnv f = Evaluator (modify f)
askLocalEnv :: Evaluator effects value (EnvironmentFor value)
askLocalEnv = Evaluator ask
localEnv :: (EnvironmentFor value -> EnvironmentFor value) -> Evaluator effects value a -> Evaluator effects value a
localEnv f a = Evaluator (local f (runEvaluator a))
data Evaluator effects value a
= Evaluator