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Error recovery in the parser #13

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sebastianriese opened this issue Feb 23, 2013 · 1 comment
Open

Error recovery in the parser #13

sebastianriese opened this issue Feb 23, 2013 · 1 comment

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@sebastianriese
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Add support for error recovery in the parser. See the Dragon Book for ideas. Good error messages for parsing errors would also be very desirable.
@sebastianriese
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Some work done. We implement a mechanism similar to yacc/bison. The rough idea is described in the dragon book: Add an ERROR symbol, when matching an error symbol ignore unmatching tokens, add productions to reduce ERROR on certain look-aheads.

TODO: Thorough testing, useful error messages, useful error reporting mechanism (perhaps related to issue #14, perhaps we should use logging or an error sink interface to be supplied by the user)

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