[antlr-interest] Automated testing of lexer/parser rules

[Bharath S]

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?

Thanks!

B.
--- micheal_jor <open.zone at virgin.net> wrote:
> --- In antlr-interest at yahoogroups.com, Bharath S
> <payasam79 at y...> wrote:
> > Hi Grp,
> > 
> > If I have lexer rules of this form:
> > -----------------
> > R1: A|B; 
> > R2: C|D;
> > 
> > A: INT 'a'; 
> > B: REAL 'a'; 
> > 
> > C: INT 'c';
> > D: REAL 'd';
> > -----------------
> > 
> > Here, I have to resolve nondeterminism betwee A
> and C
> > and also between B and D. I tried to have two
> separate
> > rules to handle both but it doesnt work. I can
> only
> > handle one of them at a time but not both. Any
> ideas
> > on how ANTLR handles this?
> > 
> > My determinism resolving rules:
> > --------------------------------
> > R1: (INT 'c') => R2 {$setType(R2);}
> >     | (INT 'a') => R1 {$setType(R1);}
> > 
> > R2: (REAL 'a') => R1 {$setType(R1);}
> >     | (REAL 'd') => R2 {$setType(R2);}
> > 
> > ---------------------------------------------
> 
> You should merge those rules into a single one like
> this:
> 
> R1 : INT 
>     ( 'c'   { $setType(R2); }
>     | 'a'
>     )
>   | REAL
>     ( 'a'
>     | 'd'  { $setType(R2); }
>     )
>   ;
> 
> Cheers,
> 
> Micheal
> ANTLR/C#
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
>      antlr-interest-unsubscribe at yahoogroups.com
> 
>  
> 


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