(values (not res) t)
(values nil nil))))
(satisfies
- (let ((predicate-name (second hairy-spec)))
- (declare (type symbol predicate-name)) ; by ANSI spec of SATISFIES
- (if (fboundp predicate-name)
- (let* (;; "Is OBJ of the SATISFIES type?" represented
- ;; as a generalized boolean.
- ;;
- ;; (Why IGNORE-ERRORS? This code is used to try to
- ;; check type relationships at compile time.
- ;; Passing only-slightly-twisted types like
- ;; (AND INTEGER (SATISFIES ODDP)) into the
- ;; rather-significantly-twisted type dispatch
- ;; system can easily give rise to oddities like
- ;; calling predicates like ODDP on values they
- ;; don't like. (E.g. on OBJ=#\NEWLINE when the
- ;; above type is tested for TYPE= against
- ;; STANDARD-CHAR, represented as a
- ;; MEMBER-TYPE.) In such cases, NIL seems to be
- ;; an appropriate answer to "is OBJ of the
- ;; SATISFIES type?")
- (gbool (ignore-errors (funcall predicate-name obj)))
- ;; RAW coerced to a pure BOOLEAN value
- (bool (not (not gbool))))
- (values bool t))
- (values nil nil)))))))))
+ ;; If the SATISFIES function is not foldable, we cannot answer!
+ (let* ((form `(,(second hairy-spec) ',obj)))
+ (multiple-value-bind (ok result)
+ (sb!c::constant-function-call-p form nil nil)
+ (values (not (null result)) ok)))))))))
\f
;;; Return the layout for an object. This is the basic operation for
;;; finding out the "type" of an object, and is used for generic
"Return the class of the supplied object, which may be any Lisp object, not
just a CLOS STANDARD-OBJECT."
(layout-classoid (layout-of object)))
-
-;;; Pull the type specifier out of a function object.
-(defun extract-fun-type (fun)
- (specifier-type (%simple-fun-type (%closure-fun fun))))
\f
;;;; miscellaneous interfaces
(function
(if (funcallable-instance-p x)
(classoid-of x)
- (extract-fun-type x)))
+ (specifier-type (sb!impl::%fun-type x))))
(symbol
(make-member-type :members (list x)))
(number