Re: Generators (iterators) for Gnu Emacs

[Stephen J. Turnbull]

Daniel Colascione writes:
 > On 12/05/2014 01:32 PM, Stefan Monnier wrote:

 > > The alternative I was thinking was to return a unique value, as in:
 > > 
 > >    (defvar gen-eog (make-symbol "¡end-of-generator!"))
 > >    (defun gen-eog-p (x) (eq x gen-oeg))
 > > 
 > 
 > Right. That's the approach I don't like: now there's a value you
 > can't enumerate. What if you wanted to enumerate, say, the values
 > of all symbols?

The existence of `make-symbol' already means you can't do that.