Homepage: http://github.com/rolandwalker/anaphora
Author: Roland Walker
Updated:
Anaphoric macros providing implicit temp variables
Quickstart
(require 'anaphora)
(awhen (big-long-calculation)
(foo it) ; `it' is provided as
(bar it)) ; a temporary variable
;; anonymous function to compute factorial using `self'
(alambda (x) (if (= x 0) 1 (* x (self (1- x)))))
;; to fontify `it' and `self'
(with-eval-after-load "lisp-mode"
(anaphora-install-font-lock-keywords))
Explanation
Anaphoric expressions implicitly create one or more temporary
variables which can be referred to during the expression. This
technique can improve clarity in certain cases. It also enables
recursion for anonymous functions.
To use anaphora, place the anaphora.el library somewhere
Emacs can find it, and add the following to your ~/.emacs file:
(require 'anaphora)
The following macros are made available
`aand'
`ablock'
`acase'
`acond'
`aecase'
`aetypecase'
`aif'
`alambda'
`alet'
`aprog1'
`aprog2'
`atypecase'
`awhen'
`awhile'
`a+'
`a-'
`a*'
`a/'
See Also
M-x customize-group RET anaphora RET
http://en.wikipedia.org/wiki/On_Lisp
http://en.wikipedia.org/wiki/Anaphoric_macro
Notes
Partially based on examples from the book "On Lisp", by Paul
Graham.
Compatibility and Requirements
GNU Emacs version 26.1 : yes
GNU Emacs version 25.x : yes
GNU Emacs version 24.x : yes
GNU Emacs version 23.x : yes
GNU Emacs version 22.x : yes
GNU Emacs version 21.x and lower : unknown
Bugs
TODO
better face for it and self
License
All code contributed by the author to this library is placed in the
public domain. It is the author's belief that the portions adapted
from examples in "On Lisp" are in the public domain.
Regardless of the copyright status of individual functions, all
code herein is free software, and is provided without any express
or implied warranties.