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From: =?utf-8?Q?Yannick_Duch=C3=AAne_=28Hibou57?=
 =?utf-8?Q?=29?=
 <yannick_duchene@yahoo.fr>
Newsgroups: comp.lang.ada
Subject: Continuations are not so good, delimited continuation are far better
Date: Mon, 21 Jul 2014 17:41:21 +0200
Organization: Ada @ Home
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Xref: news.eternal-september.org comp.lang.ada:21091
Date: 2014-07-21T17:41:21+02:00
List-Id: <comp.lang.ada>

Hi out there,

I'm posting this here, after some previous talks about the wish to get  =

coroutines in Ada.

Coroutines are related to continuations. Continuation is well know  =

abstraction in the functional programming world, which often forget abou=
t  =

real world limitations, something Ada is necessarily aware of. While  =

mathematically correct, continuations are not so good in practice.

I was questioning myself about continuation's implementation in SML  =

compilers (like MLton), and landed onto something worth to be forwarded =
in  =

an Ada newsgroup: a multi=E2=80=91page document about continuations, whe=
re the  =

author argues against classical continuation and argues in favour of  =

delimited continuation. Somewhere in these pages, he notes an  =

implementation or compiler, will anyway have to determine a delimited  =

continuation for each continuation, to implement continuations  =

efficiently. That's what I had in mind too, and that's why I enjoy this =
 =

document (I have not read all of it yet).

See: [Continuations and delimited  =

control](http://okmij.org/ftp/continuations/index.html)

-- =

=E2=80=9CSyntactic sugar causes cancer of the semi-colons.=E2=80=9D [1]
=E2=80=9CStructured Programming supports the law of the excluded muddle.=
=E2=80=9D [1]
[1]: Epigrams on Programming =E2=80=94 Alan J. =E2=80=94 P. Yale Univers=
ity