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add eval instance for sequence expression

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This commit is contained in:
Ayman Nadeem 2018-08-09 12:59:29 -04:00
parent 9b3c3d279f
commit e833ad4fef
1 changed files with 3 additions and 1 deletions
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4
src/Data/Syntax/Expression.hs
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@ -284,7 +284,9 @@ instance Ord1 SequenceExpression where liftCompare = genericLiftCompare
instance Show1 SequenceExpression where liftShowsPrec = genericLiftShowsPrec
-- TODO: Implement Eval instance for SequenceExpression
instance Evaluatable SequenceExpression
instance Evaluatable SequenceExpression where
eval (SequenceExpression a b) =
subtermValue a >> subtermRef b
-- | Javascript void operator