deactivate active region after `eval-region`

Question

I do the following to activate the region and evaluate it

M-x spc  to begin mark
C-n 
C-n
C-n
M-x eval-region

The region is still active (highlighted) after the eval-region is performed.

I would prefer if eval-region evaluated the region and then deactivated the region, leaving the cursor after the code that was just evaluated.

I have this to start:

(defun e-eval-region (START END)
  "Execute region from START to END using `eval-region and unhighlight result."
  (interactive)
  (eval-region START END)
  (keyboard-quit))

How do I properly pass START and END of region to interactive?

Answer 1

Try this (drop the optional arguments, if you want):

(defun e-eval-region (start end &optional printflag read-function)
  (interactive "r")
  (eval-region start end printflag read-function)
  (deactivate-mark))

1. Use C-h f interactive to see how to pass the region as two interactive arguments. For more information, see the Elisp manual, node Using Interactive. You can find that node in Emacs using C-h i, choosing the Elisp manual, and using i interactive RET.

2. The command loop automatically deactivates the region after each command, unless the command takes special measures to prevent that - as does eval-region. You need only deactivate the mark explicitly to counteract that.