On Thu, 5 Apr 2007, Martin Jambon wrote:

>
> On Thu, 5 Apr 2007, Hugo Ferreira wrote:
>
> >
> > Hello,
> >
> > I would like to use a reserved word and substitute that by a function
> > call. For example, the following:
> >
> > let  _ = HEAP in
> > let h1 = HEAP in
> >
> > would become
> >
> > let __heap = new_heap () in
> > let     h1 = new_heap () in
>
> You shouldn't try to do this because the parser looks only one token ahead
> to make its decision. If you add a rule that starts from "let" (it has
> to), the token which enables the parser to select this rule is in position
> 3, so it comes too late. Camlp4 will not warn you about the conflict but
> fail during preprocessing because it will choose either the predefined
> "let" rule or yours without knowing if it's the right one.
>
> It's what I was trying to explain in that message [ocaml-developer 20]:
>   
> http://groups.google.com/group/ocaml-developer/browse_frm/thread/532cfd6cc675e98b?hl=en

By the way, it's not documented anywhere, but it really should.


Martin

--
Martin Jambon
http://martin.jambon.free.fr

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