Re: Parsing from continuous stream

[Daniel Kraft]

Bob Rossi wrote:
> > > > start_symbol:
> > > >   real_start_symbol
> > > >   {
> > > >     storeValueForProcession($1);
> > > >     YYACCEPT;
> > > >   }
> > > > ;
>>
> > Thanks for the hint, it looks neat as far as I have seen yet!  But I'm not 
> > yet sure how this will help me exactly; will yypush_parse return without 
> > this YYPUSHMORE whenever it encounters the start symbol (or any symbol?), 
> > so I can process it in my code and continue calling yypush_parse 
> > afterwards, with the state including all look-ahead conserved?
>
> So basically, the idea is that you would pass in another structure to
> the parsing function, and when the grammar recognized that a rule was 
> matched from a particular token, it could set the output paramater. This
> shoudl be thread safe as well.

This sounds like the way I went as above (store the semantic value, and 
use YYACCEPT to return from the parser; but I had problems with this 
approach as the YYACCEPT obviously threw away read look-ahead tokens 
which were missing the next time I called the parser (I did change my 
grammar, which was possible without much problems, so it needed no 
look-ahead for the start-symbol; now it works satisfyingly).

> > BTW, how does one bootstrap the autotools stuff for bison?  Trying myself 
> > with aclocal; automake -a; autoheader; autoconf (like this) gives me errors 
> > in the resulting configure related to gl_* symbols; I suspect that autoconf 
> > is missing some m4-files or the like?
>
> Well, I've never attempted to do it manually. I just run the script
> 'bootstrap'. I haven't done this in a few months, so, hopefully it's
> still the same.

Thanks, I'll try it with this one.

Yours,
Daniel

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