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Re: Writing HG LISP in Python, kind of

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Subject Re: Writing HG LISP in Python, kind of
Date Wed, 24 Sep 2025 14:59:05 -0400
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Madhu <enometh@meer.net> writes:

>>
>> That’s an implementation issue, which is irrelevant to the way the
>> language works. Python lets you write
>>
>>     a, b = b, a
>>
>> as an easy way to swap the values of variables, for example.
>
> What does this non-sequitur have to do with bindings (either
> destructuring or multiple values)?
>
> Mutation of bindings is handled in lisp through generalized references
> ("places") in a uniform way.
>
> (let ((a 10) (b 20)) (rotatef a b) (list a b))
>
> https://www.lispworks.com/documentation/HyperSpec/Body/m_shiftf.htm
> https://www.lispworks.com/documentation/HyperSpec/Body/05_a.htm
>

Did you mean to reference the documentation for ROTATEF?

‘m_shiftf.htm’ is the page that documents the macro SHIFTF.

‘m_rotatef.htm’ is the page that documents the macro ROTATEF.

At the www.ai.mit.edu website, they have expanded the ‘m_’
to ‘mac_’ to provide a longer hint that a page documents a
macro:

http://www.ai.mit.edu/projects/iiip/doc/CommonLISP/HyperSpec/Body/mac_rotatef.html

-- 
The lyf so short, the craft so long to lerne.
- Geoffrey Chaucer, The Parliament of Birds.

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Thread

Re: Writing HG LISP in Python, kind of Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-04-14 23:43 +0000
  Re: Writing HG LISP in Python, kind of "B. Pym" <Nobody447095@here-nor-there.org> - 2025-06-10 07:53 +0000
  Re: Writing HG LISP in Python, kind of Aidan Kehoe <kehoea@parhasard.net> - 2025-09-23 20:28 +0100
    Re: Writing HG LISP in Python, kind of Jeff Barnett <jbb@notatt.com> - 2025-09-23 17:22 -0600
    Re: Writing HG LISP in Python, kind of Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-09-24 09:11 +0000
      Re: Writing HG LISP in Python, kind of Madhu <enometh@meer.net> - 2025-09-24 16:55 +0530
        Re: Writing HG LISP in Python, kind of tpeplt@gmail.com - 2025-09-24 14:59 -0400
        Re: Writing HG LISP in Python, kind of Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-09-24 20:34 +0000
          Re: Writing HG LISP in Python, kind of Aidan Kehoe <kehoea@parhasard.net> - 2025-09-25 06:07 +0100
            Re: Writing HG LISP in Python, kind of Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-09-25 05:49 +0000
          Re: Writing HG LISP in Python, kind of ram@zedat.fu-berlin.de (Stefan Ram) - 2025-09-26 20:12 +0000
      Re: Writing HG LISP in Python, kind of Aidan Kehoe <kehoea@parhasard.net> - 2025-09-24 14:03 +0100
        Re: Writing HG LISP in Python, kind of Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-09-24 20:33 +0000
          Re: Writing HG LISP in Python, kind of Aidan Kehoe <kehoea@parhasard.net> - 2025-09-25 05:58 +0100
            Re: Writing HG LISP in Python, kind of Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-09-25 05:50 +0000

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