Difference between revisions of "IELM"

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{{package
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| name=IELM
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| description=Emacs Lisp REPL
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| author=David Smith
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| maintainer=
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| source=
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| in_emacs=yes
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}}
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'''IELM (Interactive Emacs Lisp Mode)''' is a nice mode that gives you an interactive [[Emacs Lisp]] shell (or a {{Acronym|REPL|Read-Eval-Print Loop}} if you prefer) that you can use for exploratory programming.  You can start it by pressing {{Command|ielm}}. You'll be taken to a buffer named {{Buffer|*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.
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<!-----FEW MONTHS, YEARS FROM WE CAN DELETE STUFF. NOT NOW ------------------>
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<!-----PLEASE BE PATIENT AND CO-OPERATE FOR GREATER GOOD ------------------>
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<!------------------------------------------------------------------------->
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= Basic setup =
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IELM is bundled with Emacs by default. No additional setup is required.
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= Common Customization =
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<!-- Customization common to all platforms goes here -->
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== Show {{ModeLink|eldoc}} in IELM ==
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<source lang="lisp">
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(defun my-ielm-mode-defaults ()
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  (turn-on-eldoc-mode))
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(setq my-ielm-mode-hook 'my-ielm-mode-defaults)
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(add-hook 'ielm-mode-hook (lambda () (run-hooks 'my-ielm-mode-hook)))
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</source>
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= Recommended Reading =
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<!-- Only internal links. DO NOT insert EXTERNAL LINKS -->
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* [[Emacs Lisp]]
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* [[REPL]]
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<!------------------------------------------------------------------------->
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= Tutorial Pages =
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[http://emacs-fu.blogspot.com/2011/03/ielm-repl-for-emacs.html IELM: A REPL for Emacs]
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<!-- Add categories based on user-level (beginner etc), user-role (programming, emacs contributor etc), platform (windows, linux etc) or work flow (text editing, document authoring etc)  -->
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[[Category:Beginner]][[Category:Lisp]][[Category:Programming]]

Latest revision as of 09:14, 17 May 2017

IELM
Description Emacs Lisp REPL
Author David Smith
Part of Emacs yes

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.

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