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reorder stuff

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Ivan Malison 2016-06-06 23:05:33 -07:00
parent 88cc27b890
commit 23d93f3d2a
1 changed files with 14 additions and 14 deletions
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dotfiles/emacs.d/README.org
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@ -50,22 +50,22 @@ Death to any gui elements in emacs! Do this EARLY so that emacs doesn't redispla
** Compose functions taking arbitrarily many arguments and returning arbitrarily many arguments
#+BEGIN_SRC emacs-lisp
(defmacro imalison:compose (name &rest funcs)
"Build a new function with NAME that is the composition of FUNCS."
`(defun ,name (&rest args)
(imalison:compose-helper ,funcs)))
(defun imalison:make-list (thing)
(if (listp thing)
thing
(list thing)))
(defun imalison:make-list (thing)
(if (listp thing)
thing
(list thing)))
(defmacro imalison:compose (name &rest funcs)
"Build a new function with NAME that is the composition of FUNCS."
`(defun ,name (&rest args)
(imalison:compose-helper ,funcs)))
(defmacro imalison:compose-helper (funcs)
"Builds funcalls of FUNCS applied to the arg."
(if (equal (length funcs) 0)
(quote args)
`(apply ,(car funcs)
(imalison:make-list (imalison:compose-helper ,(cdr funcs))))))
(defmacro imalison:compose-helper (funcs)
"Builds funcalls of FUNCS applied to the arg."
(if (equal (length funcs) 0)
(quote args)
`(apply ,(car funcs)
(imalison:make-list (imalison:compose-helper ,(cdr funcs))))))
#+END_SRC
** prefix-alternatives
Prefix alternatives is a macro that builds a function that selects one of a collection of functions that are provided to the macro based on the value of the prefix argument.