Error in processor.py when processing PartiQL grammars

[miryung]

Error in processor.py when processing PartiQL grammars

[miryung]

It worked for me. Thanks Renata.

[renatahodovan]

Hi @miryung !

Thanks for the report. The problem with the provided grammar is that it consists of a combined grammar (PartiQL.g4) and a lexer grammar (PartiQLTokens.g4), instead of using either a pair of parser & lexer grammars or a single combined grammar as described in the ANTLR docs.

ANTLR will generate a single parser only from your combined grammar since it doesn't contain any lexer rules and a lexer from your lexer grammar. So, those two can work together as a parser-lexer pair. However, this is a bit of an edge case. It should be safer to define PartiQL.g4 explicitly as a parser grammar. Not to mention that Grammarinator does not support this edge case.

However, by adding the parser keyword to the first grammar definition line of PartiQL.g4 (making it parser grammar PartiQL;), Grammarinator can also handle the two grammar files.

Please, tell me if it worked for you!