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Use help-function-arglist in imalison:compose

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This allows use to automatically detect the signature of a
function/macro and take arguments accordingly in the composition.
This commit is contained in:
Ivan Malison 2016-06-22 18:43:09 -07:00
parent d61a6cf1b1
commit 6a7670f4c3
1 changed files with 30 additions and 19 deletions
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49
dotfiles/emacs.d/README.org
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@ -5,6 +5,7 @@ This README is a literate commentary on my emacs configuration, but it also serv
This makes it so that the file that is produced from tangling this file uses lexical scoping
#+BEGIN_SRC emacs-lisp
;;; -*- lexical-binding: t -*-
(setq lexical-binding t)
#+END_SRC
** User Info
#+BEGIN_SRC emacs-lisp
@ -19,6 +20,7 @@ This makes it so that the file that is produced from tangling this file uses lex
This is here because it needs to be activated as early as possible
#+BEGIN_SRC emacs-lisp
(use-package auto-compile
:ensure t
:config
(progn
(auto-compile-on-load-mode)
@ -389,17 +391,17 @@ The packages in this section provide no functionality on their own, but provide
thing
(list thing)))
(defmacro imalison:compose (&rest funcs)
(defmacro imalison:compose-with-apply (&rest funcs)
"Build a new function with NAME that is the composition of FUNCS."
`(lambda (&rest args)
(imalison:compose-helper ,funcs)))
(imalison:compose-with-apply-helper ,funcs)))
(defmacro imalison:compose-helper (funcs)
(defmacro imalison:compose-with-apply-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))))))
(imalison:make-list (imalison:compose-with-apply-helper ,(cdr funcs))))))
#+END_SRC
**** Simpler Unary version
#+BEGIN_SRC emacs-lisp
@ -416,25 +418,35 @@ The packages in this section provide no functionality on their own, but provide
#+END_SRC
**** A Version Supporting Macros
#+BEGIN_SRC emacs-lisp
(defmacro imalison:compose-2 (arguments &rest funcs)
(when (numberp arguments)
(setq arguments
(cl-loop for i from 97 to (+ arguments 96)
collect (intern (char-to-string i)))))
`(imalison:compose-2-argspec ,arguments ,arguments ,@funcs))
(defun imalison:args-expander (function-name)
(lambda (args)
(apply function-name args)))
(defmacro imalison:compose-2-argspec
(defmacro imalison:compose (&rest funcs)
(let* ((last-function (car (last funcs)))
(arguments (help-function-arglist last-function))
(call-arguments (delq '&optional arguments)))
(when (memq '&rest arguments)
(setq arguments '(&rest args))
(setq call-arguments '(args))
(setq funcs
(-replace-at (- (length arguments) 1)
(imalison:args-expander last-function)
funcs)))
`(imalison:compose-argspec ,arguments ,call-arguments ,@funcs)))
(defmacro imalison:compose-argspec
(arguments call-arguments &rest funcs)
"Build a new function with NAME that is the composition of FUNCS."
`(lambda ,arguments
(imalison:compose-2-helper ,funcs ,call-arguments)))
(imalison:compose-helper ,funcs ,call-arguments)))
(defmacro imalison:compose-2-helper (funcs arguments)
(defmacro imalison:compose-helper (funcs arguments)
"Builds funcalls of FUNCS applied to the arg."
(if (equal (length funcs) 1)
`(,(car funcs) ,@arguments)
`(,(car funcs)
(imalison:compose-2-helper ,(cdr funcs) ,arguments))))
(imalison:compose-helper ,(cdr funcs) ,arguments))))
#+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.
@ -492,7 +504,7 @@ imalison:named-build is a way to invoke a macro in such a way that the lambda th
For composing functions with an apply so that they can be used with the ~:around~ keyword of advice-add
#+BEGIN_SRC emacs-lisp
(defmacro imalison:advice-add-around-builder (&rest functions)
`(imalison:compose-2-argspec
`(imalison:compose-argspec
(function &rest args) (function args) ,@functions apply))
#+END_SRC
**** Kill New
@ -642,7 +654,7 @@ Get route information
#+BEGIN_SRC emacs-lisp
(defun imalison:muni-get-route-ids (route-name &optional direction)
(delete-dups
(mapcar (imalison:compose-2 1 intern car)
(mapcar (imalison:compose intern car)
(s-match-strings-all
"^\\([[:digit:]]\\{1,10\\}\\)"
(shell-command-to-string
@ -784,13 +796,12 @@ A macro for composing functions together to build an interactive command to copy
(defmacro imalison:compose-copy-builder (name &rest funcs)
`(imalison:named-build ,name
imalison:make-interactive
(imalison:compose-2 0 kill-new ,@funcs)))
(imalison:compose kill-new ,@funcs)))
#+END_SRC
*** Copy portions of the buffer file name
#+BEGIN_SRC emacs-lisp
(defmacro imalison:copy-buffer-file-path-builder (&rest args)
`(imalison:compose-copy-builder ,@args 'buffer-file-name))
`(imalison:compose-copy-builder ,@args buffer-file-name))
(imalison:copy-buffer-file-path-builder imalison:copy-buffer-file-path-full)
(imalison:copy-buffer-file-path-builder imalison:copy-buffer-file-name