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Diff switch statements’ cases byIndex.

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This commit is contained in:
Rob Rix 2016-08-04 11:48:28 -04:00
parent 6f39c764fd
commit 15460768bd
1 changed files with 4 additions and 1 deletions
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5
src/Interpreter.hs
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@ -15,7 +15,7 @@ import Info
import Patch
import Prologue hiding (lookup)
import SES
import Syntax
import Syntax as S
import Term
-- | Returns whether two terms are comparable
@ -41,6 +41,9 @@ diffComparableTerms construct comparable cost = recur
algorithmWithTerms :: (TermF leaf (Both a) diff -> diff) -> Term leaf a -> Term leaf a -> Algorithm (Term leaf a) diff diff
algorithmWithTerms construct t1 t2 = case (unwrap t1, unwrap t2) of
(Indexed a, Indexed b) -> byIndex Indexed a b
(S.Switch exprA casesA, S.Switch exprB casesB) -> do
expr <- recursively exprA exprB
byIndex (S.Switch expr) casesA casesB
(Commented commentsA a, Commented commentsB b) -> do
wrapped <- sequenceA (recursively <$> a <*> b)
byIndex (`Commented` wrapped) commentsA commentsB