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37 lines
1.4 KiB
Common Lisp
37 lines
1.4 KiB
Common Lisp
;;;; miscellaneous tests of symbol properties
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;;;; This software is part of the SBCL system. See the README file for
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;;;; more information.
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;;;;
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;;;; While most of SBCL is derived from the CMU CL system, the test
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;;;; files (like this one) were written from scratch after the fork
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;;;; from CMU CL.
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;;;;
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;;;; This software is in the public domain and is provided with
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;;;; absolutely no warranty. See the COPYING and CREDITS files for
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;;;; more information.
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(defun test-symbol (symbol)
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(setf (symbol-plist symbol) nil)
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(setf (get symbol 'foo) '(my list))
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(setf (get symbol 'bar) 10)
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(setf (get symbol 'baz) t)
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(assert (eql (get symbol 'bar) 10))
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(assert (= (length (symbol-plist symbol)) 6))
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(remprop symbol 'foo)
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(assert (not (get symbol 'foo))))
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(dolist (s '(foo :keyword || t nil))
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(let ((save (symbol-plist s)))
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(unwind-protect (test-symbol s)
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(setf (symbol-plist s) save))))
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;;; In early 0.7 versions on non-x86 ports, setting the property list
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;;; of 'NIL would trash (CDR NIL), due to a screwup in the low-level
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;;; layout of SYMBOL. (There are several low-level punnish tricks used
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;;; to make NIL work both as a cons and as a symbol without requiring
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;;; a lot of conditional branching at runtime.)
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(defparameter *nil-that-the-compiler-cannot-constant-fold* nil)
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(assert (not (car *nil-that-the-compiler-cannot-constant-fold*)))
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(assert (not (cdr *nil-that-the-compiler-cannot-constant-fold*)))
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;;; success
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