How to IELM use minibuffer?

How to IELM use minibuffer?

[Xue Fuqiao]

I used (interactive "x") in IELM just now, but it only returns nil and didn't let me input the Lisp object.  How can I use minibuffer in IELM?

-- 
Best regards.

Re: How to IELM use minibuffer?

[Christopher Schmidt]

Xue Fuqiao <xfq.free@gmail.com> writes:
> I used (interactive "x") in IELM just now, but it only returns nil and
> didn't let me input the Lisp object.  How can I use minibuffer in
> IELM?

interactive is not meant to be used interactively, it is merely a
declaration within functions and lambdas.  Check C-h f interactive RET

Try read-from-minibuffer in combination with read.

        Christopher

Re: How to IELM use minibuffer?

[jack-mac]

Le mercredi 9 janvier 2013 10:13:48 UTC+1, Xue Fuqiao a écrit :
> I used (interactive "x") in IELM just now, but it only returns nil and didn't let me input the Lisp object.  How can I use minibuffer in IELM?

Try: 
(defun foo (expr)
  (interactive "xType an expression: ")
  (message "It seems you typed %s" expr))

and then, from ielm:
(call-interactively 'foo)

or: M-x foo RET