tvl-depot/configs/shared/.emacs.d/wpc/string.el
William Carroll 6b456c1b7a 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
2019-12-24 15:21:34 +00:00

126 lines
3.3 KiB
EmacsLisp

;; string.el --- Library for working with strings -*- lexical-binding: t -*-
;; Author: William Carroll <wpcarro@gmail.com>
;;; Commentary:
;; Library for working with string.
;;; Code:
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Dependencies
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(require 's)
(require 'dash)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Library
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Strings
(defun string/hookify (x)
"Append \"-hook\" to X."
(s-append "-hook" x))
(defun string/ensure-hookified (x)
"Ensure that X has \"-hook\" appended to it."
(if (s-ends-with? "-hook" x)
x
(string/hookify x)))
(defun string/format (x &rest args)
"Format template string X with ARGS."
(apply #'format (cons x args)))
(defun string/concat (&rest strings)
"Joins `STRINGS' into onto string."
(apply #'s-concat strings))
(defun string/->symbol (string)
"Maps `STRING' to a symbol."
(intern string))
(defun string/<-symbol (symbol)
"Maps `SYMBOL' into a string."
(symbol-name symbol))
(defun string/prepend (prefix x)
"Prepend `PREFIX' onto `X'."
(s-concat prefix x))
(defun string/append (postfix x)
"Appen `POSTFIX' onto `X'."
(s-concat x postfix))
(defun string/surround (s x)
"Surrounds `X' one each side with `S'."
(->> x
(string/prepend s)
(string/append s)))
;; TODO: Define a macro for defining a function and a test.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Casing
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun string/caps->kebab (x)
"Change the casing of `X' from CAP_CASE to kebab-case."
(->> x
s-downcase
(s-replace "_" "-")))
(defun string/kebab->caps (x)
"Change the casing of X from CAP_CASE to kebab-case."
(->> x
s-upcase
(s-replace "-" "_")))
(defun string/lower->caps (x)
"Change the casing of X from lowercase to CAPS_CASE."
(->> x
s-upcase
(s-replace " " "_")))
(defun string/lower->kebab (x)
"Change the casing of `X' from lowercase to kebab-case."
(s-replace " " "-" x))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Predicates
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun string/instance? (x)
"Return t if X is a string."
(stringp x))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Tests
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; TODO: Support these.
;; (require 'macros)
;; (macros/test
;; :function string/surround
;; :test "works as expected"
;; :args '("-*-" "surround")
;; :expect "-*-surround-*-"
;; :equality string=)
;
;; (macros/test
;; :function string/caps->kebab
;; :test "works as expected"
;; :args '("CAPS_CASE_STRING")
;; :expect "caps-case-string"
;; :equality string=)
;
;; ;; TODO: Generate :test from docs of defun.
;; (macros/test
;; :function string/kebab->caps
;; :test "works as expected"
;; :args '("kebab-case-string")
;; :expect "KEBAB_CASE_STRING"
;; :equality =)
(provide 'string)
;;; string.el ends here