+
+;;; precise unions of array types (was bug 306a)
+(defun bug-306-a (x)
+ (declare (optimize speed)
+ (type (or (array cons) (array vector)) x))
+ (elt (aref x 0) 0))
+(assert (= 0 (bug-306-a #((0)))))
+\f
+;;; FUNCALLABLE-INSTANCE is a subtype of function.
+(assert-t-t (subtypep '(and pathname function) nil))
+(assert-t-t (subtypep '(and pathname sb-kernel:funcallable-instance) nil))
+(assert (not (subtypep '(and stream function) nil)))
+(assert (not (subtypep '(and stream sb-kernel:funcallable-instance) nil)))
+(assert (not (subtypep '(and function standard-object) nil)))
+(assert (not (subtypep '(and sb-kernel:funcallable-instance standard-object) nil)))
+
+;;; also, intersections of classes with INSTANCE should not be too
+;;; general
+(assert (not (typep #'print-object '(and standard-object sb-kernel:instance))))
+(assert (not (subtypep 'standard-object '(and standard-object sb-kernel:instance))))
+\f
+(assert-t-t
+ (subtypep '(or simple-array simple-string) '(or simple-string simple-array)))
+(assert-t-t
+ (subtypep '(or simple-string simple-array) '(or simple-array simple-string)))
+(assert-t-t
+ (subtypep '(or fixnum simple-string end-of-file parse-error fixnum vector)
+ '(or fixnum vector end-of-file parse-error fixnum simple-string)))
+
+#+sb-eval
+(assert-t-t
+ (subtypep '(and function (not compiled-function)
+ (not sb-eval:interpreted-function))
+ nil))
+
+;;; weakening of union type checks
+(defun weaken-union-1 (x)
+ (declare (optimize speed))
+ (car x))
+(multiple-value-bind (res err)
+ (ignore-errors (weaken-union-1 "askdjhasdkj"))
+ (assert (not res))
+ (assert (typep err 'type-error)))
+(defun weaken-union-2 (x)
+ (declare (optimize speed)
+ (type (or cons fixnum) x))
+ (etypecase x
+ (fixnum x)
+ (cons
+ (setf (car x) 3)
+ x)))
+(multiple-value-bind (res err)
+ (ignore-errors (weaken-union-2 "asdkahsdkhj"))
+ (assert (not res))
+ (assert (typep err 'type-error))
+ (assert (or (equal '(or cons fixnum) (type-error-expected-type err))
+ (equal '(or fixnum cons) (type-error-expected-type err)))))
+