Grammatica - 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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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).