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Antlr4 parse issues when changing lexer rule to parser rule| python

I am new to antlr, and I have been facing some issues when it comes to properly parsing the source code, this is my grammar: compilationUnit : (assignment | declarationList | definitionList)* EOF ...
TAW's user avatar
  • 13
2 votes
1 answer
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Antlr 4 in python not working as expected (trying to parse chapter and paragraph of a book)

I want to create a very simple ANTLR4 parser (in Python) without listener and visitor, which takes as input the chapter and paragraph of a book in any order, and returns the high_level (chapter) and ...
andrea's user avatar
  • 930
1 vote
1 answer
3k views

Antlr4 - matching an identifier as a single token

BLOCK_COMMENT : '/*' .*? '*/' -> skip; EOL_COMMENT : '//' ~[\r\n]* -> skip; WS: [ \n\t\r]+ -> skip; program: usingDirectives? EOF; usingDirectives: usingDirective+; usingDirective: USING ...
markonius's user avatar
  • 657
1 vote
1 answer
437 views

ANTLR4: parsing an email header, lookahead not working, Python target

I am trying to parse this portion of an email header: Received: from server.mymailhost.com (mail.mymailhost.com [126.43.75.123]) by pilot01.cl.msu.edu (8.10.2/8.10.2) with ESMTP id NAA23597;Fri, 12 ...
Roger Costello's user avatar