[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: questioning let
From: |
Andreas Röhler |
Subject: |
Re: questioning let |
Date: |
Wed, 24 Feb 2010 18:29:06 +0100 |
User-agent: |
Thunderbird 2.0.0.19 (X11/20081227) |
David Kastrup wrote:
> Andreas Roehler <andreas.roehler@online.de> writes:
>
>> Hi,
>>
>> behaviour of the example code below puzzles me. Would
>> expect setting of arg by external function, but inside
>> `let', recognised. But remains `1'.
>>
>> (defun arg-setting ()
>> (interactive)
>> (let ((arg 1))
>> (message "%s" arg)
>> (arg-extern arg)
>> (message "%s" arg)))
>>
>> (defun arg-extern (arg)
>> (setq arg (1- arg)))
>>
>> Any help?
>
> The argument binding in arg-extern is the innermost one and consequently
> the only affected one. If you make the function argument-less, it will
> likely work as expected by you, affecting the binding in arg-setting.
>
That works, thanks a lot!
However, stored in some eil.el, get a compiler warning than:
In arg-extern:
eil.el:9:9:Warning: reference to free variable `arg'
eil.el:9:17:Warning: assignment to free variable `arg'
Would think a useless warning, as the compiler should know being inside a let
(?)
Andreas
- questioning let, Andreas Roehler, 2010/02/24
- Re: questioning let, David Kastrup, 2010/02/24
- Re: questioning let,
Andreas Röhler <=
- Message not available
- Message not available
- Message not available
Re: questioning let, Pascal J. Bourguignon, 2010/02/24
Re: questioning let, Tim X, 2010/02/24