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Define an errorSyntax helper constructor.

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This commit is contained in:
Rob Rix 2017-08-06 15:55:21 -04:00
parent 0d08387684
commit 16dc1b62a7
1 changed files with 3 additions and 0 deletions
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src/Data/Syntax.hs
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@ -76,5 +76,8 @@ data Error a = Error { errorCallStack :: [([Char], SrcLoc)], errorExpected :: [S
instance Eq1 Error where liftEq = genericLiftEq
instance Show1 Error where liftShowsPrec = genericLiftShowsPrec
errorSyntax :: Error.Error String -> Error a
errorSyntax Error.Error{..} = Error (getCallStack callStack) errorExpected errorActual []
unError :: HasCallStack => Span -> Error a -> Error.Error String
unError span Error{..} = Error.withCallStack (fromCallSiteList errorCallStack) (Error.Error span errorExpected errorActual)