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RE: [External] : Re: Lexical vs. dynamic: small examples?
From: |
Drew Adams |
Subject: |
RE: [External] : Re: Lexical vs. dynamic: small examples? |
Date: |
Sun, 15 Aug 2021 15:49:31 +0000 |
> (OK, it _is_ lexical binding for the arguments and dynamic
> for the globals but has this any practical implications?)
As I said, `let' (in both Elisp and Common Lisp) binds
"special" vars dynamically and non-special vars lexically.
There's nothing else to it.
> No, the only thing I've seen so far - maybe the only thing it
> is? - is `let', and that acts in two ways, the lexical way if
> one puts
>
> ;;; -*- lexical-binding: t -*-
>
> first thing in the source file, and if one doesn't, it acts in
> the dynamic way.
See above. In Elisp we have var `lexical-binding', and
lexical binding is not not turned on by default. With
Common Lisp there's no such variable, and the effect is
as if `lexical-binding' were always non-nil. (There are
other differences, wrt how/where you can declare vars to
be "special".)
> So I wonder again, why not just have two let, one "let-stay"
> (the variables stay so has to be used and/or passed
> explicitely), and "let-follow" (the variables follow
> everywhere the code goes within the let form).
Sorry, I don't follow you. It's not clear to me what
you're proposing or (more importantly) what problem
you think you have with the designed behavior.
<<attachment: winmail.dat>>
- Re: Lexical vs. dynamic: small examples?, (continued)
Re: Lexical vs. dynamic: small examples?, tomas, 2021/08/14
RE: [External] : Re: Lexical vs. dynamic: small examples?, Drew Adams, 2021/08/14
- Re: [External] : Re: Lexical vs. dynamic: small examples?, Emanuel Berg, 2021/08/14
- Re: [External] : Re: Lexical vs. dynamic: small examples?, Emanuel Berg, 2021/08/14
- Re: [External] : Re: Lexical vs. dynamic: small examples?, Emanuel Berg, 2021/08/14
- Re: [External] : Re: Lexical vs. dynamic: small examples?, Emanuel Berg, 2021/08/15
- Re: [External] : Re: Lexical vs. dynamic: small examples?, Emanuel Berg, 2021/08/15
- RE: [External] : Re: Lexical vs. dynamic: small examples?,
Drew Adams <=
- Re: [External] : Re: Lexical vs. dynamic: small examples?, Emanuel Berg, 2021/08/15
- Re: [External] : Re: Lexical vs. dynamic: small examples?, Stefan Monnier, 2021/08/15
- Re: [External] : Re: Lexical vs. dynamic: small examples?, Emanuel Berg, 2021/08/15
RE: [External] : Re: Lexical vs. dynamic: small examples?, Drew Adams, 2021/08/15
Re: [External] : Re: Lexical vs. dynamic: small examples?, Emanuel Berg, 2021/08/15
RE: [External] : Re: Lexical vs. dynamic: small examples?, Drew Adams, 2021/08/15
RE: [External] : Re: Lexical vs. dynamic: small examples?, Drew Adams, 2021/08/15
Re: [External] : Re: Lexical vs. dynamic: small examples?, Arthur Miller, 2021/08/15
Re: [External] : Re: Lexical vs. dynamic: small examples?, Lars Ingebrigtsen, 2021/08/15
Re: [External] : Re: Lexical vs. dynamic: small examples?, Emanuel Berg, 2021/08/15