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bug#18059: 24.3.92; defvar and special variables
From: |
Noam Postavsky |
Subject: |
bug#18059: 24.3.92; defvar and special variables |
Date: |
Sun, 11 Feb 2018 10:35:22 -0500 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.0.90 (gnu/linux) |
Stefan Monnier <monnier@IRO.UMontreal.CA> writes:
>> I noticed doing (let () (defvar x)) seems to be the same as (progn
>> (defvar x)), which may be a bug.
>
> Both interpretations would make sense, so given the lack of
> documentation about the intention, we could consider it as a feature as
> much as a bug.
>
> Have you checked whether the behavior is the same with the
> byte-compiler?
Yes, it's the same.
I see that a lambda form scopes the defvar even if it has no parameters
though. I.e., the following prints 1:
;; -*- lexical-binding: t -*-
(lambda ()
(defvar x))
(let ((x 1))
(setq testfun (lambda () x)))
(message "%S" (funcall testfun))
- bug#18059: 24.3.92; defvar and special variables, Noam Postavsky, 2018/02/10
- bug#18059: 24.3.92; defvar and special variables, Michael Heerdegen, 2018/02/10
- bug#18059: 24.3.92; defvar and special variables, Drew Adams, 2018/02/10
- bug#18059: 24.3.92; defvar and special variables, Noam Postavsky, 2018/02/10
- bug#18059: 24.3.92; defvar and special variables, Stefan Monnier, 2018/02/11
- bug#18059: 24.3.92; defvar and special variables,
Noam Postavsky <=
- bug#18059: 24.3.92; defvar and special variables, Michael Heerdegen, 2018/02/11
- bug#18059: 24.3.92; defvar and special variables, Noam Postavsky, 2018/02/11
- bug#18059: 24.3.92; defvar and special variables, Noam Postavsky, 2018/02/13
- bug#18059: 24.3.92; defvar and special variables, Noam Postavsky, 2018/02/18
- bug#18059: 24.3.92; defvar and special variables, Michael Heerdegen, 2018/02/18
- bug#18059: 24.3.92; defvar and special variables, Noam Postavsky, 2018/02/21
- bug#18059: 24.3.92; defvar and special variables, Drew Adams, 2018/02/21
- bug#18059: 24.3.92; defvar and special variables, Noam Postavsky, 2018/02/21
- bug#18059: 24.3.92; defvar and special variables, Noam Postavsky, 2018/02/21
- bug#18059: 24.3.92; defvar and special variables, Drew Adams, 2018/02/21