bugGrammatica - Bugs: bug #16783, Parser: Add support for parsing...


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bug #16783: Parser: Add support for parsing empty files

Submitter:  Per Cederberg <cederberg>
Submitted:  Thu 08 Jun 2006 05:38:15 AM UTC
Severity:  2 - Normal Item Group:  Future Improvement
Status:  None Assigned to:  cederberg
Open/Closed:  Open
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Thu 08 Jun 2006 05:38:15 AM UTC, original submission:  

Currently all productions in a grammar are required to match at least 1 token. This makes the grammar simpler to analyze, while losing only one single case of expressiveness -- it is impossible to declare a grammar accepting empty input.

The grammar format should be improved in some way to also allow grammars that accept an empty file or a file with just ignored tokens (such as comments and whitespace).

Per Cederberg <cederberg>
Project Administrator


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