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QtWS25 Last Chance

Qt scanner generator

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  • Z Offline
    Z Offline
    ZapB
    wrote on last edited by
    #1

    Hey all,

    I'm looking for a Qt-compatible scanner generator to go along with "qlalr":http://qt.nokia.com/developer/qtquarterly/qlalr-adventures/. That is I'm looking for a lexer to work with qlalr much as flex is often used to work with bison or lex with yacc.

    Does anybody know of such a beast or should I just hand-code a lexer for my particular case?

    Nokia Certified Qt Specialist
    Interested in hearing about Qt related work

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    • Z Offline
      Z Offline
      ZapB
      wrote on last edited by
      #2

      I've found one way that gets me part way there with flex which is to simply use the under-documented function yy_scan_string() and pass in QByteArray.constData() as the argument before calling the yyparse() function. ie:

      @
      ...
      QByteArray ba = myString.toUtf8();
      YY_BUFFER_STATE string_buffer = yy_scan_string( ba.constData() );
      yyparse();
      yy_delete_buffer(string_buffer);
      @

      That will probably get me close enough for this little project as I am not expecting to have to worry about UTF16.

      Nokia Certified Qt Specialist
      Interested in hearing about Qt related work

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