That is out of date a bit now - we have new parsers for ANTLR 4 that start with reference grammars so that everyone has a start point.
For now though I think that you can ignore those as the ambig is OK and the lexer rule is because they are imaginary I think. Jim -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Zachary Palmer Sent: Thursday, September 16, 2010 5:09 PM To: [email protected] Subject: [antlr-interest] ANTLR ANTLR Grammar Hello all, I just tried to use the ANTLR grammar for ANTLR v3 which appears here: http://www.antlr.org/grammar/ANTLR I tried building it in ANTLR v3.1.3 and got the following messages: warning(105): /resources/grammar/ANTLRv3.g:93:9: no lexer rule corresponding to token: DOC_COMMENT |---> : DOC_COMMENT? warning(105): /resources/grammar/ANTLRv3.g:248:6: no lexer rule corresponding to token: SEMPRED |---> | SEMPRED ( g='=>' -> GATED_SEMPRED[$g] | -> SEMPRED ) warning(105): /resources/grammar/ANTLRv3.g:157:4: no lexer rule corresponding to token: DOC_COMMENT |---> : DOC_COMMENT? warning(105): /resources/grammar/ANTLRv3.g:354:22: no lexer rule corresponding to token: SEMPRED |---> : (rew+='->' preds+=SEMPRED predicated+=rewrite_alternative)* warning(200): /resources/grammar/ANTLRv3.g:472:5: Decision can match input such as "' ''$''A''N''T''L''R'' ''s''r''c'' ''"''\\''\'''"'' ''0'..'9'" using multiple alternatives: 1, 2 As a result, alternative(s) 2 were disabled for that input |---> ( ' $ANTLR ' SRC // src directive I looked through the grammar and the messages seem to be correct: DOC_COMMENT is defined as a special token and not as a lexical terminal. Anyone have any suggestions as to what I should do about this? I want to write some utilities to analyze the grammar I've written and doing so by walking over an AST of the grammar seemed to be the most promising choice. Thanks, Zach List: http://www.antlr.org/mailman/listinfo/antlr-interest Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your-email-address List: http://www.antlr.org/mailman/listinfo/antlr-interest Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your-email-address -- You received this message because you are subscribed to the Google Groups "il-antlr-interest" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/il-antlr-interest?hl=en.
