[antlr-interest] Problems with " and/or ""

[matthew ford]

Attached is a corrected version of a lexer that will handle strings
delimited by " or " (actionLexer.g)
Also attached is an alternate version which looks like it should work but
does not due to the way Antlr generates that code. (badactionLexer.g)

the interesting part of the working lexer is
  | ~('"'|'\n'|'\r')
        { if( ( (LA(0) == '&') && (LA(1) == 'q')  && (LA(2) == 'u') &&
(LA(3) == 'o')  && (LA(4) == 't')  && (LA(5) == ';')) ) {
            text.setLength(text.length()-1); // drop the & just matched
            break;
        } }
  )*
 ('"' !
    | ( 'q' ! 'u' ! 'o' ! 't' ! ';' !)  // & already matched above
   )

There should be an easier (and more strightforward) way to do this.
But if there is I have not found it yet.
Ter can you get greedy = false to work for this case?
matthew


 
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