Created
December 17, 2011 17:20
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A well functioning definiton for the add function in a partial evaluator.
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| > add :: [(String,[Expr])] -> [(String,[Expr])] -> [(String,[Expr])] -> [(String,[Expr])] | |
| > | |
| > add succ pending marked = difference (union pending succ) marked | |
| > | |
| > union pending [] = pending | |
| > union pending (call:res) | |
| > | elem call pending = union pending res | |
| > | otherwise = union (call:pending) res | |
| > | |
| > difference pend marked = [x | x <- pend, not (elem x marked)] | |
| > |
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