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Labels replace expectations.

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This commit is contained in:
Rob Rix 2017-08-06 12:57:28 -04:00
parent fb6298ba6d
commit 76edea1341
1 changed files with 1 additions and 1 deletions
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src/Data/Syntax/Assignment.hs
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@ -251,7 +251,7 @@ runAssignment toNode source = (\ assignment state -> go assignment state >>= req
Project{} -> Left (makeError node, state)
Children{} -> Left (makeError node, state)
Source -> Left (makeError node, state)
Label child _ -> go child state >>= uncurry yield
Label child label -> go child state `catchError` (throwError . first (\ err -> err { errorExpected = [Left label] })) >>= uncurry yield
state@State{..} = if not (null expectedSymbols) && all ((== Regular) . symbolType) expectedSymbols then dropAnonymous initialState else initialState
expectedSymbols = firstSet (assignment `Then` return)