Re: [TCLCORE] Question on coroutines

Joe English wrote:
> miguel sofer wrote:> >> The idea is that>>      yieldTo foo bar sum>> will:>>    1. suspend the currently running coro>>    2. cause the coro's caller to invoke [foo bar sum] in the place of>> the current coro, and take it's return value as the coro's return value>>>> IOW: it works EXACTLY like [tailcall] in the sense that the currently>> running thing is removed from the call stack and replaced by a new>> command. The difference is that where [tailcall] terminates the>> currently running proc, [yieldTo] suspends the currently running coro.> > OK, so if you have:> >     proc A {...} {> 	coroutine coro1 B ...>     }> > then in proc B:> >     yieldto C args...> > is the same as:> >     yield [C args...]> > except that:> >     (a) [uplevel 1] in the body of proc C will refer to proc A,>         not proc B; and:>     (b) C may call coro1.> > Do I have that right?

Yes. There are of course additional internal details in terms of stack 
consumption and suchlike, but irrelevant to the semantics.

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