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elsa-extension-eieio.el
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;;; elsa-extension-eieio.el --- Elsa extension for EIEIO -*- lexical-binding: t -*-
;; Copyright (C) 2023 Matúš Goljer
;; Author: Matúš Goljer <[email protected]>
;; Maintainer: Matúš Goljer <[email protected]>
;; Version: 0.0.1
;; Created: 6th March 2023
;; Package-requires: ((dash "2.17.0"))
;; Keywords:
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the GNU General Public License
;; as published by the Free Software Foundation; either version 3
;; of the License, or (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(require 'map)
(require 'dash)
(require 'elsa-explainer)
(require 'elsa-analyser)
(require 'elsa-type-helpers)
(require 'elsa-state)
(require 'elsa-typed-eieio)
(defun elsa--eieio-analyse-obj-slot (instance slot-form state)
(when slot-form
(let ((slot-name (elsa-get-name slot-form))
(inst-type (elsa-get-type instance)))
(when (elsa-class-type-p inst-type)
(when-let* ((class (get (oref inst-type name) 'elsa-defclass)))
(let* ((slots (elsa-get-slots class))
(slot-names (--map (oref it name) slots))
(slot (--find (eq slot-name (oref it name)) slots)))
(oset slot-form type (or (and slot (oref slot type))
(elsa-type-mixed)))
(unless (memq slot-name slot-names)
(elsa-state-add-message state
(elsa-make-error slot-form
"Type `%s' has no slot `%s', has %s"
:code "eieio-invalid-slot"
(elsa-type-describe inst-type)
slot-name
(or slot-names "no slots"))))))))))
(defun elsa--eieio-assert-struct-for-obj (instance state)
(let ((type (elsa-get-type instance)))
;; This test instead of `elsa-class-type-p' is so that mixed can
;; be used as a struct.
(unless (elsa-type-assignable-p (elsa-make-type (class nil)) type)
(elsa-state-add-message state
(elsa-make-error instance
"Type `%s' has no properties because it is not a class."
:code "eieio-not-a-class"
(elsa-type-describe type))))))
(defun elsa--analyse:oref (form scope state)
(let* ((instance (elsa-cadr form))
(slot-form (elsa-nth 2 form)))
(elsa--analyse-macro form (list t nil) scope state)
(elsa--eieio-assert-struct-for-obj instance state)
(elsa--eieio-analyse-obj-slot instance slot-form state)
(oset form type (oref slot-form type))))
(defun elsa--analyse:oset (form scope state)
(let* ((instance (elsa-cadr form))
(slot-form (elsa-nth 2 form))
(value-form (elsa-nth 3 form))
(slot-name (elsa-get-name slot-form)))
(elsa--analyse-macro form (list t nil t) scope state)
(elsa--eieio-assert-struct-for-obj instance state)
(elsa--eieio-analyse-obj-slot instance slot-form state)
(unless (elsa-type-assignable-p
(oref slot-form type)
(oref value-form type))
(elsa-state-add-message state
(elsa-make-error slot-form
(elsa-with-temp-explainer explainer
(elsa-explain-and-indent explainer
("Property `%s' can not accept type `%s', has type `%s'"
slot-name
(elsa-tostring (oref value-form type))
(elsa-tostring (oref slot-form type)))
(elsa-type-accept (oref slot-form type) (oref value-form type) explainer))
explainer)
:code "eieio-invalid-type"
:compact t)))))
(defun elsa-eieio--create-slots (slots)
(let ((ht (make-hash-table)))
(--each slots
(let ((slot (elsa-structure-slot
:name (car it)
:type (plist-get (cdr it) :type))))
(puthash (oref slot name) slot ht)))
ht))
(defun elsa--analyse:defclass (form _scope state)
(let* ((name (elsa-get-name (elsa-cadr form)))
(parents (elsa-nth 2 form))
(parents-names (when (elsa-form-list-p parents)
(elsa-form-map parents #'elsa-get-name)))
(slots (elsa-nth 3 form))
(parents-tree (-fix
(lambda (parents)
(-mapcat
(lambda (p)
(if (symbolp p)
(let* ((str (elsa-state-get-defclass state p))
(pars (and str (oref str parents)))
(pts (cdr (assq p pars))))
(cons (cons p (copy-sequence pts))
(copy-sequence pts)))
(list p)))
parents))
parents-names)))
(elsa-state-add-defclass state
(elsa-defclass
:name name
:slots (elsa-eieio--create-slots
(mapcar
(lambda (slot)
(let* ((slot-name (elsa-get-name slot))
(type-form (map-elt (elsa-cdr slot) :type))
(type-lisp (elsa-form-to-lisp type-form))
(elsa-type (or (and type-lisp
(or (elsa--cl-type-to-elsa-type type-lisp)
(elsa-type-mixed)))
(elsa-type-mixed)))
(accessor (map-elt (elsa-cdr slot) :accessor)))
(when accessor
(elsa-state-add-method state
(elsa-defun
:name (elsa-get-name accessor)
:defun-type 'cl-defmethod
:type (elsa-function-type
:args (list (elsa--make-type `(class ,name)))
:return elsa-type)
:arglist (list 'this))))
(list slot-name :type elsa-type)))
(elsa-form-sequence slots)))
:parents (let ((-compare-fn (-on #'eq #'car)))
(-uniq (cons (cons name parents-names) parents-tree)))))
;; add the constructor
(elsa-state-add-defun state
(elsa-defun
:name name
:type (elsa--make-type `(function (&rest mixed) (class ,name)))
:arglist (list '&rest 'args)))
;; add the type predicate
(elsa-state-add-defun state
(elsa-defun
:name (intern (concat (symbol-name name) "-p"))
:type (elsa--make-type `(function (mixed) (is (class ,name))))
:arglist (list 'x)))))
(provide 'elsa-extension-eieio)
;;; elsa-extension-eieio.el ends here