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Re: Suppress user-prompting when calling commands in programs
From: |
Eric Abrahamsen |
Subject: |
Re: Suppress user-prompting when calling commands in programs |
Date: |
Sat, 14 Jun 2014 11:47:56 +0800 |
User-agent: |
Gnus/5.130012 (Ma Gnus v0.12) Emacs/24.4.50 (gnu/linux) |
Drew Adams <drew.adams@oracle.com> writes:
>> > What's wrong with them pushing the read into the interactive spec?
>> >
>> > (defun foo (&optional arg bar)
>> > (interactive (list current-prefix-arg
>> > (org-icompleting-read ...))))
>> > ...)
>>
>> A quick side-question: Everyone here is using &optional for the prefix
>> arg name.
>
> I used &optional because that is what was used in the original `foo'.
> Presumably there is existing code that uses `foo' and expects that
> signature, e.g., tries to evaluate `(foo)'.
>
>> I have several functions lying around that use the "P"
>> interactive spec but don't specify arg as &optional, and seem to work
>> fine. My understanding is that, if there is no prefix arg, arg will
>> simply be nil, as it should be.
>
> Correct.
>
>> Apart from style/code clarity, are there other reasons for specifying
>> &optional?
>
> See above. Use &optional if you want to be able to call the function
> without passing that argument.
Ah, of course -- sort of the inverse of the OP's question. Thanks!
- Re: Suppress user-prompting when calling commands in programs, (continued)
Re: Suppress user-prompting when calling commands in programs, Nicolas Richard, 2014/06/13
Message not available
RE: Suppress user-prompting when calling commands in programs, Drew Adams, 2014/06/14
Re: Suppress user-prompting when calling commands in programs, Thorsten Jolitz, 2014/06/14