[antlr-interest] nondeterminism problem

[stephane brossier]

Hey,


I don't know much about antlr, but did you try to
increase the value of k (lookahead) to 6?
This is maybe a dirty solution but i don't know
any better...

Hope this helps.

S.


--- Jack Hong <jack_xu_hong at yahoo.ca> wrote:
> Hi all,
>  
> I get following warning messages when I run ANTLR:
>  
> warning: lexical nondeterminism between rules IDENT
> and BOOLEAN_LITERAL
> upon
> petal.g:0:  k==1:'F','T'
> petal.g:0:  k==2:'A','R'
> petal.g:0:  k==3:'L','U'
>  
> related token definitions in my grammar file:
>  
> BOOLEAN_LITERAL
>     :    "TRUE"
>     |    "FALSE"
>     ;
>  
> IDENT
>     :    ( 'a'..'z' | 'A'..'Z' | '_') ( 'a'..'z' |
> 'A'..'Z' | '_' |
> '0'..'9')*
>     ;
>  
>  
> Any idea of how to fix these two nondeterministic
> tokens will be greatly
> appreciated.
>  
>  
> Thanks
> Jack
>  
> 


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