Re: [TCLCORE] Question on coroutines

Neil Madden wrote:
> I'm not sure I see in what case the dispatcher needs to do more than a  > simple [eval], though. In what situation do you get a chain of 
control > transfers with yieldTo? (My understanding is that this behaves 
like [tailcall],
> so there should be no chains).

Others can correct if I'm mistaken, but there's a subtle difference 
between [tailcall] and having the caller [eval] a script that is
returned, beyond the convenience of syntax.  [tailcall] resolves
the command name in the context of the [tailcall] command, while
an [eval] in the caller would resolve in the caller context.  Many
times this does not matter, but sometimes it does.

I was assuming from the prior messages that [yieldTo] would follow
the same pattern as [tailcall].

-- 
| Don Porter          Mathematical and Computational Sciences Division |
| dona...@nist.gov             Information Technology Laboratory |
| http://math.nist.gov/~DPorter/                                  NIST |
|______________________________________________________________________|

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