In DEFTYPE forms with constant output, simplify the expansion so that no new function is created.

parent 216408a2
......@@ -53,7 +53,7 @@ Builds a new function which accepts any number of arguments but always outputs N
;;; DEFTYPE macro.
(defmacro deftype (name lambda-list &rest body)
(defmacro deftype (name lambda-list &rest body &environment env)
"Syntax: (deftype name lambda-list {decl | doc}* {form}*)
Defines a new type-specifier abbreviation in terms of an 'expansion' function
(lambda lambda-list1 {DECL}* {FORM}*)
......@@ -79,7 +79,7 @@ by (documentation 'NAME 'type)."
(let ((function `#'(LAMBDA-BLOCK ,name ,lambda-list ,@body)))
(when (and (null lambda-list) (consp body) (null (rest body)))
(let ((form (first body)))
(when (and (consp form) (eq (first form) 'quote))
(when (constantp form env)
(setf function form))))
`(eval-when (:compile-toplevel :load-toplevel :execute)
,@(si::expand-set-documentation name 'type doc)
......@@ -90,16 +90,16 @@ by (documentation 'NAME 'type)."
;;; Some DEFTYPE definitions.
(deftype boolean ()
"A BOOLEAN is an object which is either NIL or T."
`(member nil t))
'(member nil t))
(deftype index ()
`(INTEGER 0 #.array-dimension-limit))
'(INTEGER 0 #.array-dimension-limit))
(deftype fixnum ()
"A FIXNUM is an integer between MOST-NEGATIVE-FIXNUM (= - 2^29 in ECL) and
MOST-POSITIVE-FIXNUM (= 2^29 - 1 in ECL) inclusive. Other integers are
`(INTEGER #.most-negative-fixnum #.most-positive-fixnum))
'(INTEGER #.most-negative-fixnum #.most-positive-fixnum))
(deftype bignum ()
'(OR (INTEGER * (#.most-negative-fixnum)) (INTEGER (#.most-positive-fixnum) *)))
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