Jim,
Indeed, I want to use the custom pointer defined in ANTLR3_COMMON_TOKEN_struct.
I have done this:
@init
{
double* pCustom = ANTLR3_MALLOC(sizeof(double));
*pCustom = 0;
CUSTOM = (ANTLR3_UINT32)pCustom;
}
My problem is that I have not found any way to set the freeCustom pointer (that
is the pointer to a function that knows how to free the custom structure when
the token is destroyed). I have probably missed something but the only way I
have found to set this freeCustom pointer was to override the emit function. Is
there another way to do it?
Thanks,
Yann
> Message du 15/01/10 à 18h50
> De : "Jim Idle" <[email protected]>
> A : "[email protected]" <[email protected]>
> Copie à :
> Objet : Re: [antlr-interest] Overriding the emit function to use custom
> tokens
>
> No, you have to override nextToken too it calls emit directly for performance
> reasons.
>
> However, no one really needs to do this. There is a user defined pointer
> built in to every token and a function pointer that is called when the token
> is released (if it is not NULL). So you can just add your custom token stuff
> there and rely on the default runtime.
>
> Jim
>
> > -----Original Message-----
> > From: [email protected] [mailto:antlr-interest-
> > [email protected]] On Behalf Of [email protected]
> > Sent: Friday, January 15, 2010 5:53 AM
> > To: [email protected]
> > Subject: [antlr-interest] Overriding the emit function to use custom
> > tokens
> >
> > Hello,
> >
> > I wanted to create a custom token object, so I have seen in the FAQ
> > that I had to "override" the lexer emit function. So I did that this
> > way:
> >
> > ...
> > pLexer = antlrLexerNew(pInput);
> > pLexer->pLexer->emit = customEmit;
> > ...
> >
> > but it was not working.
> >
> > The customEmit function was never called. So I have debugged and I
> > think there is a bug in antlr3lexer.c. In the nextTokenStr function,
> > shouldn't "emit(lexer)" be replaced by "lexer->emit(lexer);"? What do
> > you think?
> >
> > Thanks,
> > Yann
> >
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