Re: quotes in SET grammar

Thomas Lockhart wrote:
> ...
> > I think it would be best to disallow the double-quoted form...
> > However, I'm not sure *how* to disallow it without also disallowing
> > unquoted words (since ultimately the productions reduce to ColId,
> > and the lexer output doesn't distinguish quoted and unquoted
> > identifiers).
> 
> Well, that would be how to distinguish them; we could define a new
> token, say "QIDENT" to refer to quoted identifiers and leave "IDENT" for
> the unquoted ones. Then a little work in gram.y should be enough to
> finish the job.
> 
> The use of IDENT in gram.y is isolated to just a few places so
> introducing QIDENT would be almost trivial afaict.

Well, we allow single-quotes, and we allow no quotes.  People already
know they can quote identifiers and it only affects the case, so should
we explicitly disallow the double-quotes?  I don't see why, I guess. 
We certainly don't want to document the double-quotes though.

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