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Re: Warnings about keymaps
From: |
Stefan Monnier |
Subject: |
Re: Warnings about keymaps |
Date: |
Mon, 14 Sep 2009 17:46:25 -0400 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.1.50 (gnu/linux) |
>> The bug can be seen more directly by byte-compiling the file below:
>>
>> (defconst foo nil)
>> (defvar foo nil)
>>
>> Looks like the "assignment-to-constant" warning should be more
>> careful to distinguish defvar from setq.
> This seems a fairly nonsensical thing to do, so why shouldn't the
> compiler warn about it?
It could, but it shouldn't complain about assignment to a constant,
since the defvar will not perform any assignment. I.e. maybe a warning
is OK, but not the warning we currently get.
> The defvar is a best a no-op, at worst a bug
> (if you were expecting it to have an effect).
In the OP's case the defvar was expected to have as effect to "provide
a default value to the var in case it's not defined elsewhere". So it
seems to behave as expected (it's a no-op since the var is defined
elsewhere).
Stefan
- Warnings about keymaps, Eli Zaretskii, 2009/09/11
- Re: Warnings about keymaps, Glenn Morris, 2009/09/11
- Re: Warnings about keymaps, Stefan Monnier, 2009/09/11
- Re: Warnings about keymaps, Glenn Morris, 2009/09/14
- Re: Warnings about keymaps,
Stefan Monnier <=
- Re: Warnings about keymaps, Glenn Morris, 2009/09/14
- Re: Warnings about keymaps, Stefan Monnier, 2009/09/15
- Re: Warnings about keymaps, Glenn Morris, 2009/09/17
- Re: Warnings about keymaps, Stefan Monnier, 2009/09/17
- Re: Warnings about keymaps, Glenn Morris, 2009/09/18
- Re: Warnings about keymaps, Stephen J. Turnbull, 2009/09/18
- Re: Warnings about keymaps, Stefan Monnier, 2009/09/18
- Re: Warnings about keymaps, Richard Stallman, 2009/09/15