mirror of
https://github.com/sharkdp/bat.git
synced 2024-11-29 19:23:34 +01:00
81 lines
2.8 KiB
Common Lisp
81 lines
2.8 KiB
Common Lisp
|
(cl:defpackage :chillax.utils
|
||
|
|
(:use :cl :alexandria)
|
||
|
|
(:export
|
||
|
|
:fun :mkhash :hashget :strcat :dequote :at))
|
||
|
|
(in-package :chillax.utils)
|
||
|
|
|
||
|
|
;;; Functions
|
||
|
|
(defmacro fun (&body body)
|
||
|
|
"This macro puts the FUN back in FUNCTION."
|
||
|
|
`(lambda (&optional _) (declare (ignorable _)) ,@body))
|
||
|
|
|
||
|
|
;;; Hash tables
|
||
|
|
(defun mkhash (&rest keys-and-values &aux (table (make-hash-table :test #'equal)))
|
||
|
|
"Convenience function for `literal' hash table definition."
|
||
|
|
(loop for (key val) on keys-and-values by #'cddr do (setf (gethash key table) val)
|
||
|
|
finally (return table)))
|
||
|
|
|
||
|
|
(defun hashget (hash &rest keys)
|
||
|
|
"Convenience function for recursively accessing hash tables."
|
||
|
|
(reduce (lambda (h k) (gethash k h)) keys :initial-value hash))
|
||
|
|
|
||
|
|
(define-compiler-macro hashget (hash &rest keys)
|
||
|
|
(if (null keys) hash
|
||
|
|
(let ((hash-sym (make-symbol "HASH"))
|
||
|
|
(key-syms (loop for i below (length keys)
|
||
|
|
collect (make-symbol (format nil "~:@(~:R~)-KEY" i)))))
|
||
|
|
`(let ((,hash-sym ,hash)
|
||
|
|
,@(loop for key in keys for sym in key-syms
|
||
|
|
collect `(,sym ,key)))
|
||
|
|
,(reduce (lambda (hash key) `(gethash ,key ,hash))
|
||
|
|
key-syms :initial-value hash-sym)))))
|
||
|
|
|
||
|
|
(defun (setf hashget) (new-value hash key &rest more-keys)
|
||
|
|
"Uses the last key given to hashget to insert NEW-VALUE into the hash table
|
||
|
|
returned by the second-to-last key.
|
||
|
|
tl;dr: DWIM SETF function for HASHGET."
|
||
|
|
(if more-keys
|
||
|
|
(setf (gethash (car (last more-keys))
|
||
|
|
(apply #'hashget hash key (butlast more-keys)))
|
||
|
|
new-value)
|
||
|
|
(setf (gethash key hash) new-value)))
|
||
|
|
|
||
|
|
;;; Strings
|
||
|
|
(defun strcat (string &rest more-strings)
|
||
|
|
(apply #'concatenate 'string string more-strings))
|
||
|
|
|
||
|
|
(defun dequote (string)
|
||
|
|
(let ((len (length string)))
|
||
|
|
(if (and (> len 1) (starts-with #\" string) (ends-with #\" string))
|
||
|
|
(subseq string 1 (- len 1))
|
||
|
|
string)))
|
||
|
|
|
||
|
|
;;;
|
||
|
|
;;; At
|
||
|
|
;;;
|
||
|
|
(defgeneric at (doc &rest keys))
|
||
|
|
(defgeneric (setf at) (new-value doc key &rest more-keys))
|
||
|
|
|
||
|
|
(defmethod at ((doc hash-table) &rest keys)
|
||
|
|
(apply #'hashget doc keys))
|
||
|
|
(defmethod (setf at) (new-value (doc hash-table) key &rest more-keys)
|
||
|
|
(apply #'(setf hashget) new-value doc key more-keys))
|
||
|
|
|
||
|
|
(defmethod at ((doc list) &rest keys)
|
||
|
|
(reduce (lambda (alist key)
|
||
|
|
(cdr (assoc key alist :test #'equal)))
|
||
|
|
keys :initial-value doc))
|
||
|
|
(defmethod (setf at) (new-value (doc list) key &rest more-keys)
|
||
|
|
(if more-keys
|
||
|
|
(setf (cdr (assoc (car (last more-keys))
|
||
|
|
(apply #'at doc key (butlast more-keys))
|
||
|
|
:test #'equal))
|
||
|
|
new-value)
|
||
|
|
(setf (cdr (assoc key doc :test #'equal)) new-value)))
|
||
|
|
|
||
|
|
;; A playful alias.
|
||
|
|
(defun @ (doc &rest keys)
|
||
|
|
(apply #'at doc keys))
|
||
|
|
(defun (setf @) (new-value doc key &rest more-keys)
|
||
|
|
(apply #'(setf at) new-value doc key more-keys))
|