diff options
author | William Carroll <wpcarro@gmail.com> | 2019-10-09T11·13+0100 |
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committer | William Carroll <wpcarro@gmail.com> | 2019-12-24T15·21+0000 |
commit | 6b456c1b7a4f6899f063a6e65355af51901d9c7a (patch) | |
tree | cfc70d74818ae9fabdbbfb0cf16cce092e4c1a09 /configs/shared/.emacs.d/wpc/struct.el | |
parent | a7c72adb2ebec1e497fc040eaf3551d564d61a5b (diff) |
Massive configuration overhaul
Currently paying the price of months of non-diligent git usage. Here's what has changed. - Theming support in Gvcci and wpgtk - Dropping support for i3 - Supporting EXWM - Many Elisp modules - Collapsed redundant directories in ./configs
Diffstat (limited to 'configs/shared/.emacs.d/wpc/struct.el')
-rw-r--r-- | configs/shared/.emacs.d/wpc/struct.el | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/configs/shared/.emacs.d/wpc/struct.el b/configs/shared/.emacs.d/wpc/struct.el new file mode 100644 index 000000000000..248d08e97c42 --- /dev/null +++ b/configs/shared/.emacs.d/wpc/struct.el @@ -0,0 +1,71 @@ +;;; struct.el --- Helpers for working with structs -*- lexical-binding: t -*- +;; Author: William Carroll <wpcarro@gmail.com> + +;;; Commentary: +;; Provides new macros for working with structs. Also provides adapter +;; interfaces to existing struct macros, that should have more intuitive +;; interfaces. +;; +;; Sometimes `setf' just isn't enough. + +;;; Code: + +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; +;; Wish list +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + +;; - TODO: Replace `symbol-name' and `intern' calls with isomorphism. + +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; +;; Dependencies +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + +(require 'string) +(require 'dash) + +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; +;; Functions +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + +(defmacro struct/update (type field f xs) + "Apply F to FIELD in XS, which is a struct of TYPE. +This is immutable." + (let ((copier (->> type + symbol-name + (string/prepend "copy-") + intern)) + (accessor (->> field + symbol-name + (string/prepend (string/concat (symbol-name type) "-")) + intern))) + `(let ((copy (,copier ,xs))) + (setf (,accessor copy) (funcall ,f (,accessor copy))) + copy))) + +(defmacro struct/set (type field x xs) + "Immutably set FIELD in XS (struct TYPE) to X." + (let ((copier (->> type + symbol-name + (string/prepend "copy-") + intern)) + (accessor (->> field + symbol-name + (string/prepend (string/concat (symbol-name type) "-")) + intern))) + `(let ((copy (,copier ,xs))) + (setf (,accessor copy) ,x) + copy))) + +(defmacro struct/set! (type field x xs) + "Set FIELD in XS (struct TYPE) to X mutably. +This is an adapter interface to `setf'." + (let ((accessor (->> field + symbol-name + (string/prepend (string/concat (symbol-name type) "-")) + intern))) + `(progn + (setf (,accessor xs) ,x) + xs))) + +(provide 'struct) +;;; struct.el ends here |