0.8.13.49

[sbcl.git] / src / code / alien-type.lisp

diff --git a/src/code/alien-type.lisp b/src/code/alien-type.lisp
index 41a6e84..5aed5cd 100644 (file)
--- a/src/code/alien-type.lisp
+++ b/src/code/alien-type.lisp
@@ -26,6 +26,9 @@
 
 (!define-type-class alien)
 
+(!define-type-method (alien :negate) (type)
+  (make-negation-type :type type))
+
 (!define-type-method (alien :unparse) (type)
   `(alien ,(unparse-alien-type (alien-type-type-alien-type type))))
 
@@ -38,11 +41,6 @@
 ;;; others (toplevel form time instead of cold load init time) because
 ;;; ALIEN-VALUE itself is a structure which isn't defined until fairly
 ;;; late.
-;;;
-;;; FIXME: I'm somewhat tempted to just punt ALIEN from the type system.
-;;; It's sufficiently unlike the others that it's a bit of a pain, and
-;;; it doesn't seem to be put to any good use either in type inference or
-;;; in type declarations.
 (!define-superclasses alien ((alien-value)) progn)
 
 (!define-type-method (alien :simple-=) (type1 type2)
@@ -65,7 +63,7 @@
   (if alien-type
       (let ((lisp-rep-type (compute-lisp-rep-type alien-type)))
        (if lisp-rep-type
-           (specifier-type lisp-rep-type)
+           (single-value-specifier-type lisp-rep-type)
            (%make-alien-type-type alien-type)))
       *universal-type*))