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bug#30078: 27.0.50; Use lexical-binding for M-:
From: |
Stefan Monnier |
Subject: |
bug#30078: 27.0.50; Use lexical-binding for M-: |
Date: |
Sat, 13 Jan 2018 13:05:58 -0500 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) |
>> No, they'll work pretty much as before.
> Then you are saying that turning on lexical-binding in *scratch* will
> change nothing at all?
Not nothing at all, but the two languages are *very* similar and the
differences rarely show up in a single expression.
My gut feeling is that the main risk to bump into an undesirable
behavior is something like
(let ((foopkg-var t))
(foopkg-fun arg1 arg2))
where foopkg is not yet loaded and foopkg-fun is autoloaded: Emacs will
only be told that `foopkg-var` is a dynamic-variable once the
`foopkg-fun` call causes `foopkg` to be loaded, so Emacs will mistakenly
use lexical scoping for the let binding because at that it still knows
nothing about `foopkg-var`.
Stefan
- bug#30078: 27.0.50; Use lexical-binding for M-:, (continued)
- bug#30078: 27.0.50; Use lexical-binding for M-:, Stefan Monnier, 2018/01/13
- bug#30078: 27.0.50; Use lexical-binding for M-:, Eli Zaretskii, 2018/01/13
- bug#30078: 27.0.50; Use lexical-binding for M-:, Stefan Monnier, 2018/01/13
- bug#30078: 27.0.50; Use lexical-binding for M-:, Richard Stallman, 2018/01/13
- bug#30078: 27.0.50; Use lexical-binding for M-:, Drew Adams, 2018/01/13
- bug#30078: 27.0.50; Use lexical-binding for M-:, Richard Stallman, 2018/01/14
- bug#30078: 27.0.50; Use lexical-binding for M-:,
Stefan Monnier <=
- bug#30078: 27.0.50; Use lexical-binding for M-:, Eli Zaretskii, 2018/01/13
Re: bug#30078: 27.0.50; Use lexical-binding for M-:, nazienham, 2018/01/12