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Add headings to compose implementations

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Ivan Malison 2016-06-21 16:12:56 -07:00
parent 1eb3f48dfc
commit bf6406908e
1 changed files with 3 additions and 5 deletions
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dotfiles/emacs.d/README.org
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@ -435,7 +435,7 @@ imalison:named-build is used to name a lambda produced by another macro applied
(cons ,builder-name args))) (cons ,builder-name args)))
#+END_SRC #+END_SRC
** Compose functions ** Compose functions
The composed functions can take arbitrarily many arguments and returning arbitrarily many arguments. *** Arbitrary arguments at every step
#+BEGIN_SRC emacs-lisp #+BEGIN_SRC emacs-lisp
(defun imalison:make-list (thing) (defun imalison:make-list (thing)
(if (listp thing) (if (listp thing)
@ -454,8 +454,7 @@ The composed functions can take arbitrarily many arguments and returning arbitra
`(apply ,(car funcs) `(apply ,(car funcs)
(imalison:make-list (imalison:compose-helper ,(cdr funcs)))))) (imalison:make-list (imalison:compose-helper ,(cdr funcs))))))
#+END_SRC #+END_SRC
*** Simpler Unary version
Here is a unary version which avoids all the calls to imalison:make-list
#+BEGIN_SRC emacs-lisp #+BEGIN_SRC emacs-lisp
(defmacro imalison:compose-unary (&rest funcs) (defmacro imalison:compose-unary (&rest funcs)
"Build a new function with NAME that is the composition of FUNCS." "Build a new function with NAME that is the composition of FUNCS."
@ -468,8 +467,7 @@ Here is a unary version which avoids all the calls to imalison:make-list
'arg 'arg
`(funcall ,(car funcs) (imalison:compose-helper-unary ,(cdr funcs))))) `(funcall ,(car funcs) (imalison:compose-helper-unary ,(cdr funcs)))))
#+END_SRC #+END_SRC
*** Most performant version supports macros
Here is a version that will support macros and requires unary functions after the first one
#+BEGIN_SRC emacs-lisp #+BEGIN_SRC emacs-lisp
(defmacro imalison:compose-named-functions (arguments &rest funcs) (defmacro imalison:compose-named-functions (arguments &rest funcs)
"Build a new function with NAME that is the composition of FUNCS." "Build a new function with NAME that is the composition of FUNCS."