[antlr-interest] Why is this nondeterminism
mzukowski at yci.com
mzukowski at yci.com
Tue Jun 18 09:49:37 PDT 2002
OK, so what rules are calling eventStatement?
> -----Original Message-----
> From: Trey Spiva [mailto:Trey.Spiva at embarcadero.com]
> Sent: Tuesday, June 18, 2002 9:36 AM
> To: 'antlr-interest at yahoogroups.com'
> Subject: RE: [antlr-interest] Why is this nondeterminism
>
>
> > Something is probably calling eventStatement somehow? Also
> what is the
> > type
> > rule?
>
> type
> : name
> | builtInType
> ;
>
> builtInType
> : "boolean"
> | "integer"
> | "double"
> | "byte"
> | "long"
> | "single"
> | "currency"
> | "decimal"
> | "date"
> | "string"
> | "variant"
> | "object"
> ;
>
> protected
> name
> : IDENT (subScript)? (options {greedy=true;} : DOT^ IDENT
> (subScript)? )*
> ;
>
> protected
> subScript
> : LPAREN (subScriptElement (COMMA subScriptElement)* )? RPAREN
> ;
>
> subScriptElement
> : NUM_INT ("to" NUM_INT)?
> ;
>
> > Consider this input:
> >
> > EVENT IDENT LPAREN IDENT RPAREN
> >
> > it's having a tough time knowing if LPAREN IDENT RPAREN
> should match the
> > optional part of eventStatement or something that follows
> from something
> > calling eventStatement. By default it will match in
> eventStatement. If
> > that is the desired behavior then you can turn the warning
> off with an
> > option. This is similar to the if/else problem which there
> must be a FAQ
> > for...
> >
> > Monty
> >
> > > -----Original Message-----
> > > From: Trey Spiva [mailto:Trey.Spiva at embarcadero.com]
> > > Sent: Tuesday, June 18, 2002 9:16 AM
> > > To: 'antlr-interest at yahoogroups.com'
> > > Subject: [antlr-interest] Why is this nondeterminism
> > >
> > >
> > > I am receiving the errors:
> > >
> > > warning: nondeterminism upon
> > > k==1:LPAREN
> > > k==2:IDENT
> > > k==3:IDENT,RPAREN,"as"
> > > between alts 1 and 2 of block
> > >
> > > for the following rules. Can any one give me an idea of
> > > why the rules are nodeterministic.
> > >
> > > eventStatement
> > > : "event" IDENT ( LPAREN eventArgListDef RPAREN )?
> > > ;
> > >
> > > protected
> > > eventArgListDef
> > > : argumentModifiers IDENT ( "as" type )?
> > > ;
> > >
> > > argumentModifiers
> > > : ( argumentModifier )*
> > > {#argumentModifiers = #(#[MODIFIERS,"MODIFIERS"],
> > > #argumentModifiers);}
> > > ;
> > >
> > > protected
> > > argumentModifier
> > > : "optional"
> > > | "byval"
> > > | "byref"
> > > ;
> > >
> > >
> > >
> > > Your use of Yahoo! Groups is subject to
> > http://docs.yahoo.com/info/terms/
> >
> >
> >
> >
> > Your use of Yahoo! Groups is subject to
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