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From: Juanma Barranquero <lekktu@gmail.com>
To: Le Wang <l26wang@gmail.com>
Cc: emacs-devel@gnu.org
Subject: Re: when to call provide, first or last?
Date: Mon, 27 Feb 2012 13:59:05 +0100	[thread overview]
Message-ID: <CAAeL0ST=0M9R_VamL0=pBUOJPeXi7kBwdvnEHEj1epVq21a-ng@mail.gmail.com> (raw)
In-Reply-To: <CAM=K+irP2nEXBLS9vBfkYt7qvXE1uoS+7GqnU-hq_9kX5iV6Wg@mail.gmail.com>

On Mon, Feb 27, 2012 at 13:47, Le Wang <l26wang@gmail.com> wrote:

> Is there some disadvantage to calling it first that I'm not seeing?

Try loading this file my-feature.el:

;;; starts here
(provide 'my-feature)
)
(defun my-function ()
  "")
;;; ends here

with  emacs -Q -l my-feature.el, and you'll get:

load-with-code-conversion: Invalid read syntax: ")"

(featurep 'my-feature) => t
(fboundp 'my-function) => nil

In other words, having `provide' at the end guarantees that the
feature does not enter the feature list unless the file was correctly
loaded.

    Juanma



  reply	other threads:[~2012-02-27 12:59 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-02-27 12:47 when to call provide, first or last? Le Wang
2012-02-27 12:59 ` Juanma Barranquero [this message]
2012-02-27 13:09   ` Le Wang
2012-02-27 13:25     ` Juanma Barranquero
2012-02-27 13:32       ` Le Wang
2012-02-27 13:44         ` Juanma Barranquero
2012-02-27 13:57           ` Le Wang
2012-02-27 14:05             ` Drew Adams
2012-02-27 13:35 ` Stefan Monnier
2012-02-27 13:42   ` Le Wang
2012-02-27 14:25     ` Stefan Monnier
2012-02-27 15:08     ` Harald Hanche-Olsen
2012-02-27 15:46       ` Le Wang

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