[PATCH] emacs: replace setq + let with let*
Mark Walters
markwalters1009 at gmail.com
Sun Jun 2 10:25:36 PDT 2013
On Sun, 02 Jun 2013, david at tethera.net wrote:
> From: David Bremner <bremner at debian.org>
>
> I found several places where a setq is immediately followed by a let
> or a let*. This seems to be the pessimal combination, with the
> implicit scope of the setq combined with the extra indentation of the let.
> I combined these cases into a single let* which I think is easier to read.
> In two places I turned a single clause let into a let*.
> ---
> emacs/notmuch-hello.el | 4 ++--
> emacs/notmuch-show.el | 4 ++--
> emacs/notmuch.el | 5 ++---
> 3 files changed, 6 insertions(+), 7 deletions(-)
>
> diff --git a/emacs/notmuch-hello.el b/emacs/notmuch-hello.el
> index c1c6f4b..15e3614 100644
> --- a/emacs/notmuch-hello.el
> +++ b/emacs/notmuch-hello.el
> @@ -260,8 +260,8 @@ afterwards.")
> (defun notmuch-hello-search (&optional search)
> (interactive)
> (unless (null search)
> - (setq search (notmuch-hello-trim search))
> - (let ((history-delete-duplicates t))
> + (let* ((search (notmuch-hello-trim search))
> + (history-delete-duplicates t))
> (add-to-history 'notmuch-search-history search)))
> (notmuch-search search notmuch-search-oldest-first nil nil
These look good to me except I don't see why the above is a let* not a
let?
Best wishes
Mark
> #'notmuch-hello-search-continuation))
> diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el
> index 18b4671..e8c8343 100644
> --- a/emacs/notmuch-show.el
> +++ b/emacs/notmuch-show.el
> @@ -1734,8 +1734,8 @@ TAG-CHANGES is a list of tag operations for `notmuch-tag'."
>
> See `notmuch-tag' for information on the format of TAG-CHANGES."
> (interactive)
> - (setq tag-changes (notmuch-tag (notmuch-show-get-message-id) tag-changes))
> - (let* ((current-tags (notmuch-show-get-tags))
> + (let* ((tag-changes (notmuch-tag (notmuch-show-get-message-id) tag-changes))
> + (current-tags (notmuch-show-get-tags))
> (new-tags (notmuch-update-tags current-tags tag-changes)))
> (unless (equal current-tags new-tags)
> (notmuch-show-set-tags new-tags))))
> diff --git a/emacs/notmuch.el b/emacs/notmuch.el
> index af107e2..edb5a1c 100644
> --- a/emacs/notmuch.el
> +++ b/emacs/notmuch.el
> @@ -904,9 +904,8 @@ Other optional parameters are used as follows:
> target-line: The line number to move to if the target thread does not
> appear in the search results."
> (interactive)
> - (if (null query)
> - (setq query (notmuch-read-query "Notmuch search: ")))
> - (let ((buffer (get-buffer-create (notmuch-search-buffer-title query))))
> + (let* ((query (or query (notmuch-read-query "Notmuch search: ")))
> + (buffer (get-buffer-create (notmuch-search-buffer-title query))))
> (switch-to-buffer buffer)
> (notmuch-search-mode)
> ;; Don't track undo information for this buffer
> --
> 1.8.2.rc2
>
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