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Error "grammar ANTLRv4LexBasic has no non-fragment rules"
See original GitHub issueWith antlr-4.9.2-complete.jar I now get a an error when generating parser + lexer files for the ANTLRv4 grammar. The base lexer grammar only contains fragment lexer rules, which never had been a problem so far. Now it is and I wish the previous behavior back. What is the rational behind this error, which makes organizing grammar into separate parts difficult?
Also it would make sense to use the ANTLRv4 grammar in tests to see if that gives problems (instead of only using very simple grammars).
The error definition itself exists for a long time in ErrorType.java, so I assume something with the condition <if(arg2.implicitLexerOwner)> must have changed recently, so that we suddenly see this error.
Issue Analytics
- State:
- Created 2 years ago
- Comments:5 (4 by maintainers)
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I created the pull request which should help. @parrt please merge ASAP.
Ok, actually the previous behavior can be rolled back because this commit fixes code generation even if no one real token is presented.