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Re: Is it possible for a macro to expand to nothing?
From: |
Pascal J. Bourguignon |
Subject: |
Re: Is it possible for a macro to expand to nothing? |
Date: |
Fri, 27 Nov 2009 18:45:33 +0100 |
User-agent: |
Gnus/5.1008 (Gnus v5.10.8) Emacs/22.3 (darwin) |
Helmut Eller <eller.helmut@gmail.com> writes:
> * Pascal J. Bourguignon [2009-11-27 14:52+0100] writes:
>
>> ,@ cannot be put outside of a ` context, never ever.
>
> That's not true. ,@ outside of backquote is just an ordinary symbol:
>
> (defun ,@ () "it works")
> (defun , () "this works too")
> (message "See, how %s. And %s." (,@) (,))
Oops! (I was right in Common Lisp, but emacs lisp is different here).
--
__Pascal Bourguignon__
- Re: Is it possible for a macro to expand to nothing?, (continued)
- Re: Is it possible for a macro to expand to nothing?, Kevin Rodgers, 2009/11/27
- Message not available
- Re: Is it possible for a macro to expand to nothing?, Alan Mackenzie, 2009/11/27
- Re: Is it possible for a macro to expand to nothing?, Pascal J. Bourguignon, 2009/11/27
- Re: Is it possible for a macro to expand to nothing?, Alan Mackenzie, 2009/11/27
- Re: Is it possible for a macro to expand to nothing?, Pascal J. Bourguignon, 2009/11/27
- Re: Is it possible for a macro to expand to nothing?, Helmut Eller, 2009/11/27
- Re: Is it possible for a macro to expand to nothing?,
Pascal J. Bourguignon <=
- Re: Is it possible for a macro to expand to nothing?, Tim X, 2009/11/27
- Re: Is it possible for a macro to expand to nothing?, Pascal J. Bourguignon, 2009/11/27
- Re: Is it possible for a macro to expand to nothing?, Alan Mackenzie, 2009/11/28
- Re: Is it possible for a macro to expand to nothing?, Pascal J. Bourguignon, 2009/11/28
- Re: Is it possible for a macro to expand to nothing?, Thierry Volpiatto, 2009/11/28
- Message not available
- Re: Is it possible for a macro to expand to nothing?, Pascal J. Bourguignon, 2009/11/28
- Re: Is it possible for a macro to expand to nothing?, Pascal J. Bourguignon, 2009/11/24
- Message not available
- Re: Is it possible for a macro to expand to nothing?, Pascal J. Bourguignon, 2009/11/23
- RE: Is it possible for a macro to expand to nothing?, Drew Adams, 2009/11/23
- Message not available
- Re: Is it possible for a macro to expand to nothing?, Pascal J. Bourguignon, 2009/11/23