GHC.Types.SourceError

Source errors

Documentation

newtype SourceError

A source error is an error that is caused by one or more errors in the source code. A SourceError is thrown by many functions in the compilation pipeline. Inside GHC these errors are merely printed via log_action, but API clients may treat them differently, for example, insert them into a list box. If you want the default behaviour, use the idiom:

handleSourceError printExceptionAndWarnings $ do
  ... api calls that may fail ...

The SourceErrors error messages can be accessed via srcErrorMessages. This list may be empty if the compiler failed due to -Werror (Opt_WarnIsError).

See printExceptionAndWarnings for more information on what to take care of when writing a custom error handler.

Constructors

SourceError (Messages GhcMessage)

Instances

Show SourceError

Defined in GHC.Types.SourceError

Methods

showsPrec :: Int -> SourceError -> ShowS

show :: SourceError -> String

showList :: [SourceError] -> ShowS

Exception SourceError

Defined in GHC.Types.SourceError

Methods

toException :: SourceError -> SomeException

fromException :: SomeException -> Maybe SourceError

displayException :: SourceError -> String

mkSrcErr :: Messages GhcMessage -> SourceError

srcErrorMessages :: SourceError -> Messages GhcMessage

throwErrors :: MonadIO io => Messages GhcMessage -> io a

throwOneError :: MonadIO io => MsgEnvelope GhcMessage -> io a

handleSourceError

Arguments

:: MonadCatch m

=> (SourceError -> m a)

exception handler

-> m a

action to perform

-> m a

Perform the given action and call the exception handler if the action throws a SourceError. See SourceError for more information.