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Re: guile-log and delimeted continuations

From: Nala Ginrut
Subject: Re: guile-log and delimeted continuations
Date: Fri, 27 Sep 2013 10:53:04 +0800

On Thu, 2013-09-26 at 17:14 +0200, Stefan Israelsson Tampe wrote:
> We would like to construct a continuation, howso? This will demand
> some trickery but in the end we would get it to work like
> (with-delimeted-continuation-tag tag
>    (lambda () code ...)
>    (lambda (kk a ...)
>      ...))

We have call-with-prompt does the same work, but I'm not sure if you
want to re-implement it

> kk will be a meta continuation e.g. the state will be stored and a real
> continuation will be made by issuing k = (kk), we would still need to
> unwind explicitly (we will be at the state of the abort) and the we
> can use k just as a normal fact e.g. (k X Y Z). the meaning of issuing
> the continuation is that we will continue at the old state and when
> the (lambda () code ...) successes it will copy X Y Z to their values,
> reinstantiate the state at the beginning of (k X Y Z) and then unify
> the interpretation of X Y Z with the copied values. and continue after
> (k X Y Z) NICE!
> Anyway this is all words, I need to go into the fog and implement the
> stuff. All cheers and have a nice day/night!
> /Stefan

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