[antlr-interest] Tutorial Seems to Have Improper Java

[Matthew Tedder]

Separating them into separate files doesn't seem to
make any difference... The following line gives an
error... it's expecting a '{'

class ExprLexer extends Lexer;

I am learning Java, but I know C++.. I presume Lexer
is defined in antlr.* but I do not understand what is
supposed to be happening here...

Matthew



--- Terence Parr <parrt at cs.usfca.edu> wrote:

> 
> 
> On Nov 18, 2004, at 1:45 PM, Matthew Tedder wrote:
> > While I code in C/C++ and flex/bison, I am new to
> Java
> > and trying to learn antlr, too.  The following
> link is
> > to code I found in an antlr tutorial:
> >
> > http://pastebin.com/121239
> >
> > But it doesn't work.. javac says it's expecting
> '{'
> > after:
> >
> > class ExrLexer extends lever;
> >
> > Can anyone tell me what is wrong here?  Once I get
> > just one simple thing working, I think I could be
> > happy playing with it for a while..
> 
> Somebody has the main and .g file looking like one. 
> Make this a 
> separate file:
> 
> import antlr.*;
> public class Main {
>   public static void main(String[] args) throws
> Exception {
>     ExprLexer lexer = new ExprLexer(System.in);
>     ExprParser parser = new ExprParser(lexer);
>     parser.expr();
>   }
> }
> 
> Ter
> --
> CS Professor & Grad Director, University of San
> Francisco
> Creator, ANTLR Parser Generator,
> http://www.antlr.org
> Cofounder, http://www.jguru.com
> Cofounder, http://www.knowspam.net enjoy email
> again!
> 
> 
> 
> 
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> 



 
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