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;; SPDX-License-Identifier: EUPL-1.2
;; SPDX-FileCopyrightText: 2025 Uko Kokņevičs <perkontevs@gmail.com>
(defpackage :ukkoclot/hash-tables
(:use :c2cl)
(:export :alist->hash-table :gethash-lazy :plist->hash-table))
(in-package :ukkoclot/hash-tables)
(defun alist->hash-table (alist &rest args &key &allow-other-keys)
(let ((ht (apply #'make-hash-table args)))
(loop for (key . value) in alist do
(setf (gethash key ht) value))
ht))
(defmacro gethash-lazy (key hash-table default-lazy)
(let ((unique (gensym "UNIQUE-"))
(res (gensym "RES-")))
`(let* ((,unique ',unique)
(,res (gethash ,key ,hash-table ,unique)))
(if (eq ,res ,unique)
,default-lazy
,res))))
(defun plist->hash-table (plist &rest args &key &allow-other-keys)
(let ((ht (apply #'make-hash-table args)))
(loop for (key value) on plist by #'cddr do
(setf (gethash key ht) value))
ht))
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