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Yura
2026-02-04 11:20:46 -08:00
parent 76de232733
commit 58d081da8c
1 changed files with 1 additions and 3 deletions
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lab03/interp.lhs
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@@ -84,7 +84,7 @@ You must complete the other cases.
> evaluate :: Exp -> Val
> evaluate ETrue = VTrue
> evaluate EFalse = error "TBD"
> evaluate EFalse = VFalse
> evaluate (Eif e1 e2 e3) = error "TBD"
@@ -111,5 +111,3 @@ you add in support the expressions 'succ e', 'pred e', and integers.
With this change, it is possible for evaluate to get 'stuck',
e.g. pred true.
For a first pass, simply use the error function in these cases.