Re: continuations (was Re: error() or nil, 'error msg')
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- Subject: Re: continuations (was Re: error() or nil, 'error msg')
- From: Coda Highland <chighland@...>
- Date: 2014年9月30日 12:37:23 -0700
On Tue, Sep 30, 2014 at 12:21 PM, Tom N Harris <telliamed@whoopdedo.org> wrote:
> On Wednesday, September 24, 2014 10:07:29 PM Andrew Starks wrote:
>> Does this mean that we're going to loose coroutines? :)
>
> If by "loose" you mean "set free", then yes perhaps it will.
>
> (My apologies. It was too good to pass up.)
>
> But instead of seeing goto as a continuation, what if it's a tail-call?
>
> function A()
> local N=0
> local C=function()
> N=N+1
> goto B
> end
> N=1+C()
> ::B::
> return N
> end
> print(A())
>
> Does this print 1 or 2? Assuming a hypothetical Lua that allows such a thing.
>
It prints 1. You've skipped over the assignment instruction.
/s/ Adam