[antlr-interest] Is ANTLR Hallucinating?

[Randall R Schulz]

On Tuesday 26 June 2007 07:03, Wincent Colaiuta wrote:
> El 26/6/2007, a las 15:59, Randall R Schulz escribió:
> >> Yeah, I'm using standalone ANTLRWorks as well. This screenshot
> >> (<http://antlr.org/works/screenshots/ambiguouspath.jpg>) shows
> >> what ambiguous path visualization looks like. Note the check boxes
> >> for the alternatives; in order to see both paths both check boxes
> >> must be checked.
> >
> > I've never seen anything like that, even when I get those warnings
> > from
> > the ANTLR tool.
> >
> > How do you get multiple productions at one time in the Syntax
> > Diagram? I
> > can't get that to happen—I never see the racetrack diagram for more
> > than one production at a time.
>
> No specific action should be required on your part. If multiple rules
> need to be shown in order to display the ambiguous paths then
> ANTLRWorks should display them automatically whenever the rule with
> the ambiguity (highlighted red in the list of rules) is selected.

Too many interacting issues and options...

So I have to turn off backtracking and then try to apply the grammar in 
the Interpreter before it does whatever it does to recompute the 
conflicts. (I just saw your message about using the Generate Code 
command instead of the Interpreter). Then I get non-terminal / 
production names in red and when I select one of them, I see the set of 
rules that participate in the ambiguity with the green and red conflict 
arcs.

What does the bold, pulsating red arc mean?


Is anything supposed to happend when I issue the Help command (from the 
Help menu)? 'Cause nothing happens on my system (not even a "not help 
available" alert).

Also, when the conflict diagram is displayed and the ANTLRworks window 
is active, it seems to consume all available CPU cycles.


> Cheers,
> Wincent


Thanks for your help.

Randall Schulz