[antlr-interest] DFA's encoded directly in java bytecodes

[Terence Parr]

On Oct 25, 2004, at 2:45 AM, Martin Probst wrote:
> Hi,
> I'm pretty sure you know about this but it wasn't mentioned on the 
> list so
> I thought I'll drop a line ...
>
>> For the Java target of ANTLR 3.0, I've been concerned about the 
>> hideous
>> nature of the code generated for DFA machines.  Without a goto
>> instruction in Java, [...]
>
> It is true that there is no *real* goto statement in Java (and the
> reserved keyword isn't used) but there is somewhat of a goto statement
> that looks like this:
> mylabel1:
>   for (...)
>     for (...)
>     if (ragnaroek)

Hi Martin

heh, cool is this the norse "end of the world" term? ;)  Thought i read 
that term somewhere. ;)

>       break mylabel1;
> which is effectively a goto, though it will not work if you want to 
> jump

Somebody just mentioned this to me last night (another Martin believe 
it or not) and I and not thought of a "one time executed for loop", but 
you cannot jump *forward* can you?  You can only break out of a 
loop...i thought of break first, naturally.

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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