Re: improving yysyntax_error()

[Hans Aberg]

It happened 21 Jun 2007, at 22:51, that Christian Schoenebeck wrote:

> Es geschah am Thursday, 21. June 2007 22:15 als Hans Aberg schrieb:
> With "intergrated type completion support" I mean a convenient way
> > > for parser
> > > developers (or actually interpreter developers) to let the user
> > > "complete"
> > > the current input upon the current parser state, in case there is
> > > only one
> > > possible shift transition, that is for highly redundant languages.
> >
> > This has been discussed here. One really need LR(1) for that, because
> > LALR(1) compacts the states in way that the error tokens may not
> > appear until some reductions have been performed (And so causing the
> > same problem if one wants to find the completion tokens directly from
> > the states).
>
> And were exactly is the problem about that? I mean one just has to  
> traverse
> the possible transitions "virtually", including reductions to  
> retrieve the
> error tokens then. Is it the bad runtime effeciency or am I missing  
> something
> important? Seems there is no public archive of this list, so you  
> cannot point
> me to the respective thread, can you?

Just getting some willing figuring out the details and implementing  
it. I mentioned it in comp.compilers to somebody investigating the  
problem, so it could be that it is already underway.

  Hans Aberg