Difference between revisions of "IELM"

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m (Basic setup)
m (Show eldoc in IELM)
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<!-- Customization common to all platforms goes here -->
 
<!-- Customization common to all platforms goes here -->
  
== Show <tt>[[eldoc]]</tt> in IELM ==
+
== Show {{ModeLink|eldoc}} in IELM ==
 
<source lang="lisp">
 
<source lang="lisp">
 
(defun my-ielm-mode-defaults ()
 
(defun my-ielm-mode-defaults ()

Revision as of 10:25, 28 March 2012

IELM (Interactive Emacs Lisp Mode) is a nice mode that gives you an interactive Emacs Lisp shell (or a REPL if you prefer) that you can use for exploratory programming. You can start it by pressing M-x ielm. You'll be taken to a buffer named "*ielm*", where Emacs Lisp expressions you've entered will be evaluated on pressing the Return key. IELM offers some nice features like tab autocompletion of symbol names and the ability to span an expression over several lines.



Basic setup

IELM is bundled with Emacs by default. No additional setup is required.

Helpful keybindings

[Tab]
Complete symbol at point.
[Return]
Evaluate expression


Common Customization

Show eldoc in IELM

(defun my-ielm-mode-defaults ()
  (turn-on-eldoc-mode))
 
(setq my-ielm-mode-hook 'my-ielm-mode-defaults)
 
(add-hook 'ielm-mode-hook (lambda () (run-hooks 'my-ielm-mode-hook)))

Recommended Reading


Tutorial Pages

IELM: A REPL for Emacs