In ANSI Common Lisp, all classes must be named by symbols.
This system makes it possible to name classes by lists of symbols instead, using only standard MOP wizardry.
Tested on SBCL, ECL and CCL.
LIST-NAMED-CLASS> (defclass (foo) () ())
#<LIST-NAMED-CLASS (FOO)>
LIST-NAMED-CLASS> (find-class '(foo))
#<LIST-NAMED-CLASS (FOO)>
LIST-NAMED-CLASS> (make-instance '(foo))
#<(FOO) {10116348B3}>
LIST-NAMED-CLASS> (defclass (bar) () ((slot :initarg :slot :accessor slot)))
#<LIST-NAMED-CLASS (BAR)>
LIST-NAMED-CLASS> (make-instance '(bar))
#<(BAR) {1011907C63}>
LIST-NAMED-CLASS> (setf (slot *) 42)
42
LIST-NAMED-CLASS> (slot **)
42
LIST-NAMED-CLASS> (defclass (bar baz) () ())
#<LIST-NAMED-CLASS (BAR BAZ)>
LIST-NAMED-CLASS> (defgeneric foo (bar baz)
(:method ((bar (bar baz)) (baz (bar baz))) 42))
#<COMMON-LISP:STANDARD-GENERIC-FUNCTION LIST-NAMED-CLASS::FOO (1)>
LIST-NAMED-CLASS> (foo (make-instance '(bar baz)) (make-instance '(bar baz)))
42
LIST-NAMED-CLASS> (defmethod foo ((bar string) (baz (bar baz))) :nook)
#<STANDARD-METHOD LIST-NAMED-CLASS::FOO
(STRING (CLASS #<LIST-NAMED-CLASS (BAR BAZ)>)) {10181D4FB3}>
LIST-NAMED-CLASS> (foo "a" (make-instance '(bar baz)))
:NOOK
LIST-NAMED-CLASS> (defclass (parent) () ())
#<LIST-NAMED-CLASS (PARENT)>
LIST-NAMED-CLASS> (defclass (child) ((parent)) ())
#<LIST-NAMED-CLASS (CHILD)>
LIST-NAMED-CLASS> (defclass parent-2 () ())
#<STANDARD-CLASS LIST-NAMED-CLASS::PARENT-2>
LIST-NAMED-CLASS> (defclass child-2 ((parent) parent-2) ())
#<STANDARD-CLASS CHILD-2>Package LIST-NAMED-CLASS contains symbols DEFCLASS, DEFGENERIC,
DEFMETHOD, FIND-CLASS, MAKE-INSTANCE, and CHANGE-CLASS that are meant to
be shadowing-imported into your package. The most convenient way to do so is to
use UIOP:DEFINE-PACKAGE's :MIX option:
(uiop:define-package my-package
(:mix #:list-named-class #:cl))
All classes named after lists are subclasses of class LIST-NAMED-CLASS.
All instances of classes named after lists are subclasses of class
LIST-NAMED-INSTANCE.
Copyright © 2018 Michał "phoe" Herda
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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