[antlr-interest] Clarifications on grammar rules.

[Bharath S]

Hi,

Thanks to Ter for the reply; I looked at ParseTree
testing tutorial on antlr.org and it pretty much
answers my question. 

I also have a small grammar related question:

I have a rule of the form:
----------------------------------------
Time: ('0'..'9')+
      ('d'{$setType(Days);} | 's'{$setType(Secs);} 
      | {$setType(INT);}) ;

and 
-------------------------
protected Days: INT('d'); 
protected Secs: INT('s');
protected INT: ('0'..'9')+;
---------------------------
When I try "Test: Secs|Days", I get a non-determinism
warning and it makes sense because both rules have
common left prefixes. However, I have no clue to how I
can fix it. If I write a separate rule to remove
common prefixes in "Secs" and "Days", it conflicts
with the above rule, "Time". Am I missing something
obvious?

--- Terence Parr <parrt at cs.usfca.edu> wrote:
> On Apr 5, 2004, at 4:17 PM, Bharath S wrote:
> 
> > Hi Grp,
> >
> > Can somebody provide information on how to
> automate
> > the testing of lexer/parser rules? I usually put
> my
> > test cases in a text file and feed it to my main
> > program using the direction operator. I am using
> Antlr
> > in Eclipse IDE and would like to automate testing
> > using JUnit. Can someone shed some light on this?
> 
> Howdy.  I will be putting some thought into this
> myself to test antlr 3 
> functionality.  Definitely you want to use the
> parse-tree/derivation 
> stuff I put into 2.7.3 so you can see precisely how
> the tool parses 
> your input.
> 
> Ter
> --
> Professor Comp. Sci., 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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