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devel / comp.lang.lisp / Little gem found in 1989 Cfront sources.

SubjectAuthor
* Little gem found in 1989 Cfront sources.Kaz Kylheku
`* Re: Little gem found in 1989 Cfront sources.Paul Rubin
 `* Re: Little gem found in 1989 Cfront sources.Jeff Barnett
  `- Re: Little gem found in 1989 Cfront sources.Paul Rubin

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Little gem found in 1989 Cfront sources.

<20240213190300.616@kylheku.com>

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From: 433-929-6894@kylheku.com (Kaz Kylheku)
Newsgroups: comp.lang.lisp
Subject: Little gem found in 1989 Cfront sources.
Date: Wed, 14 Feb 2024 03:06:00 -0000 (UTC)
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 by: Kaz Kylheku - Wed, 14 Feb 2024 03:06 UTC

In a file "template.h" which is part of the implementation an early version of
C++ templates (calling them the "parametrized type facility"), this is found:

// A Lisp style cons cell to help build lists. The parametrized type facility,
// should obviate the need for this type-unsafe nonsense.
class cons {
public:
void *car ;
cons *cdr ;
cons (void *pcar, cons *pcdr) { car = pcar ; cdr = pcdr ; } ;
} ;

Could 2024 could be the year when it finally obviates, once and for all?

--
TXR Programming Language: http://nongnu.org/txr
Cygnal: Cygwin Native Application Library: http://kylheku.com/cygnal
Mastodon: @Kazinator@mstdn.ca

Re: Little gem found in 1989 Cfront sources.

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From: no.email@nospam.invalid (Paul Rubin)
Newsgroups: comp.lang.lisp
Subject: Re: Little gem found in 1989 Cfront sources.
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 by: Paul Rubin - Sun, 18 Feb 2024 02:07 UTC

Kaz Kylheku <433-929-6894@kylheku.com> writes:
> Could 2024 could be the year when it finally obviates, once and for all?

Is something happening with C++ templates that would change how that
cons works? STL already has List<T> and that is similar to how lists in
Haskell and Ocaml work. You usually wouldn't have a list of objects of
arbitrary varying type, though you have a limited set that you represent
as a sum type or a GADT.

Re: Little gem found in 1989 Cfront sources.

<uqs73u$tnv4$1@dont-email.me>

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From: jbb@notatt.com (Jeff Barnett)
Newsgroups: comp.lang.lisp
Subject: Re: Little gem found in 1989 Cfront sources.
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 by: Jeff Barnett - Sun, 18 Feb 2024 06:12 UTC

On 2/17/2024 7:07 PM, Paul Rubin wrote:
> Kaz Kylheku <433-929-6894@kylheku.com> writes:
>> Could 2024 could be the year when it finally obviates, once and for all?
>
> Is something happening with C++ templates that would change how that
> cons works? STL already has List<T> and that is similar to how lists in
> Haskell and Ocaml work. You usually wouldn't have a list of objects of
> arbitrary varying type, though you have a limited set that you represent
> as a sum type or a GADT.

PLIST are very popular and much used in LISP. Even elements are of any
type where EQ is useful but odd numbered elements are arbitrary. I know
I'm picking a nit but, what the hell, it's late Saturday and TV sucks.
--
Jeff Barnett

Re: Little gem found in 1989 Cfront sources.

<87il2h1qro.fsf@nightsong.com>

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From: no.email@nospam.invalid (Paul Rubin)
Newsgroups: comp.lang.lisp
Subject: Re: Little gem found in 1989 Cfront sources.
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 by: Paul Rubin - Wed, 21 Feb 2024 20:55 UTC

Jeff Barnett <jbb@notatt.com> writes:
>> Haskell and Ocaml work. You usually wouldn't have a list of objects of
>> arbitrary varying type,
> PLIST are very popular and much used in LISP.

Sure, yeah, lists of mixed-type objects are not that unusual in Lisp. I
had meant in Haskell or Ocaml.

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