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Add a convenience to modify the contents of a Join.

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This commit is contained in:
Rob Rix 2016-03-24 13:59:49 -04:00
parent ea97b04032
commit d118070186
1 changed files with 3 additions and 0 deletions
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src/Alignment.hs
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@ -143,6 +143,9 @@ groupChildrenByLine ranges children = go (fromThese [] [] $ runJoin ranges) chil
getRange (Free (Annotated (Info range _) _)) = range
getRange (Pure patch) | Info range _ :< _ <- getSplitTerm patch = range
modifyJoin :: (p a a -> p b b) -> Join p a -> Join p b
modifyJoin f = Join . f . runJoin
intersects :: Range -> Range -> Bool
intersects a b = max (start a) (start b) < min (end a) (end b)