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Re: Working with constansts
From: |
Nikolaj Schumacher |
Subject: |
Re: Working with constansts |
Date: |
Tue, 12 May 2009 11:44:27 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.0.93 (darwin) |
Richard Riley <rileyrgdev@googlemail.com> wrote:
>> Because this would incur overhead on every assignment, as it would have
>> to check whether the variable being assigned was declared as a constant.
>> Since this is so rarely the case, this overhead could be seen as mostly
>> wasted and unnecessary.
>
> I don't know enough about Lisp than I can only assume that in this case
> it can not be detected at compile time IF you compile to byte/p code.
"Thanks" to dynamic scoping it cannot be caught at compile time.
(defconst xxx nil)
(defun change-xxx ()
(setx xxx t)) ;; const or variable?
(let ((xxx nil))
(change-xxx))
regards,
Nikolaj Schumacher
- Re: Working with constansts, (continued)
- Message not available
- Re: Working with constansts, Pascal J. Bourguignon, 2009/05/10
- Re: Working with constansts, Richard Riley, 2009/05/10
- Re: Working with constansts, Pascal J. Bourguignon, 2009/05/11
- Re: Working with constansts, Nikolaj Schumacher, 2009/05/12
- Message not available
- Re: Working with constansts, Pascal J. Bourguignon, 2009/05/12
- Re: Working with constansts, Nikolaj Schumacher, 2009/05/18
- Message not available
- Message not available
- Message not available
- Re: Working with constansts, Pascal J. Bourguignon, 2009/05/18
- Re: Working with constansts, Nikolaj Schumacher, 2009/05/18
- Message not available
- Re: Working with constansts, Barry Margolin, 2009/05/10
- Re: Working with constansts, Richard Riley, 2009/05/10
- Re: Working with constansts,
Nikolaj Schumacher <=
- Message not available
- Re: Working with constansts, Pascal J. Bourguignon, 2009/05/12
- Message not available
- Re: Working with constansts, Barry Margolin, 2009/05/13
- Re: Working with constansts, Ralf Wachinger, 2009/05/13
- Re: Working with constansts, Barry Margolin, 2009/05/13
- Re: Working with constansts, Thien-Thi Nguyen, 2009/05/11
- Message not available
- Re: Working with constansts, Barry Margolin, 2009/05/11
Re: Working with constansts, Decebal, 2009/05/11