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Re: Understanding the "let" construct and the setting of variables
From: |
Michael Heerdegen |
Subject: |
Re: Understanding the "let" construct and the setting of variables |
Date: |
Fri, 18 Dec 2020 10:16:02 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
<tomas@tuxteam.de> writes:
> > > I would thing the variable has to be made somewhere.
> > > In fact people talk about "unboundp".
> >
> > A variable can be unbound. Would be hard to call `boundp' with a
> > variable that doesn't exist.
>
> But then, you don't call `boundp' on variables. You call it on
> symbols.
Yes, `boundp' is even lexical scoping agnostic, and (boundp t) ==> t,
although `t' is not very...variable.
> AFAIK (but I could be wrong, corrections welcome!) there's no explicit
> notion of variable in Emacs Lisp, i.e. you cah't "have" a variable
> object and manipulate it directly.
>
> That doesn't mean they don't exist -- I fancy them living in the grey
> area between symbols and bindings.
Well said.
Regards,
Michael.
- Re: Understanding the "let" construct and the setting of variables, (continued)
- Re: Understanding the "let" construct and the setting of variables, steve-humphreys, 2020/12/16
- Re: Understanding the "let" construct and the setting of variables, Joost Kremers, 2020/12/17
- RE: Understanding the "let" construct and the setting of variables, Drew Adams, 2020/12/17
- Re: RE: Understanding the "let" construct and the setting of variables, steve-humphreys, 2020/12/17
- RE: RE: Understanding the "let" construct and the setting of variables, Drew Adams, 2020/12/17
- Re: Understanding the "let" construct and the setting of variables, Michael Heerdegen, 2020/12/17
- Re: Understanding the "let" construct and the setting of variables, tomas, 2020/12/18
- Re: Understanding the "let" construct and the setting of variables,
Michael Heerdegen <=
- Re: Understanding the "let" construct and the setting of variables, Emanuel Berg, 2020/12/18
- Re: Understanding the "let" construct and the setting of variables, Michael Heerdegen, 2020/12/18
- RE: Understanding the "let" construct and the setting of variables, Drew Adams, 2020/12/18
- Re: Understanding the "let" construct and the setting of variables, Stefan Monnier, 2020/12/19
Re: Understanding the "let" construct and the setting of variables, Emanuel Berg, 2020/12/18
Re: Understanding the "let" construct and the setting of variables, Emanuel Berg, 2020/12/18