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Re: Emacs contributions, C and Lisp

From: Eli Zaretskii
Subject: Re: Emacs contributions, C and Lisp
Date: Wed, 07 Jan 2015 05:41:19 +0200

> Date: Tue, 6 Jan 2015 15:45:39 -0500
> From: "Perry E. Metzger" <address@hidden>
> Cc: address@hidden, address@hidden, address@hidden,
>  address@hidden
> > Please also describe why the AST is needed for completion, which was
> > the original topic discussed here.
> Oh, well for C and C++, given that you can't know the scope of an
> identifier (or even what it is -- see the awful C typedef problem in
> parsing) without pretty good scope and symbol table info, I had
> thought that was obvious. If it isn't, I'm happy to explain in
> detail, but I had thought that Richard had written a bunch of the
> early GCC stuff himself and understood that.

I think that this is only necessary for OO languages, so you can
complete on C identifiers without the AST.  C++, OTOH, is another
matter.  So I think an explanation with examples will help here.


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