[antlr-interest] Warning/ambiguity suppression

[Olivier Dragon]

You could use predicates and match a non-identifier character after the
word (you could have a variable named trueThat or falseData).

TRUE:
	("true" ~(IDENTCHAR))=> "true" ;
FALSE:
	("false" ~(IDENTCHAR))=> "false" ;

protected IDENTCHAR:
	('a'..'z'|'A'..'Z'|'0'..'9'|'_') ;

On Fri, Jul 22, 2005 at 12:23:01PM +0200, loic.lefevre at bnpparibas.com wrote:
> 
> Hello,
> I'm currently working on a grammar to handle expressions.
> I've used the Java grammar part dealing with expressions.
> Finally, my grammar is finished but I've got warnings:
> 
> antlr:prepare-filesystem:
>     [mkdir] Created dir: headless\target\generated\antlr
> ANTLR Parser Generator   Version 2.7.5 (20050128)   1989-2005 jGuru.com
> RosterExpression.g: warning:lexical nondeterminism between rules TRUE and
> IDENT upon
> RosterExpression.g:     k==1:'t'
> RosterExpression.g:     k==2:'r'
> RosterExpression.g:     k==3:'u'
> RosterExpression.g:     k==4:'e'
> RosterExpression.g: warning:lexical nondeterminism between rules FALSE and
> IDENT upon
> RosterExpression.g:     k==1:'f'
> RosterExpression.g:     k==2:'a'
> RosterExpression.g:     k==3:'l'
> RosterExpression.g:     k==4:'s'
> 
> Can someone explain me how to suppress them?
> I've tried to change the k option, but it doesn't wok.
> 
> See grammar in attachment:
> 
> (See attached file: RosterExpression.g)
> 
> Loïc
> 
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