(let ((block-name (when env
(car (find-if #'car (sb!c::lexenv-blocks env))))))
(if block-name
- (gensym (format nil "~A[~S]" name block-name))
- (gensym name))))
+ (sb!xc:gensym (format nil "~A[~A]" name block-name))
+ (sb!xc:gensym name))))
+
+;;; Compile a version of BODY for all TYPES, and dispatch to the
+;;; correct one based on the value of VAR. This was originally used
+;;; only for strings, hence the name. Renaming it to something more
+;;; generic might not be a bad idea.
+(defmacro string-dispatch ((&rest types) var &body body)
+ (let ((fun (sb!xc:gensym "STRING-DISPATCH-FUN")))
+ `(flet ((,fun (,var)
+ ,@body))
+ (declare (inline ,fun))
+ (etypecase ,var
+ ,@(loop for type in types
+ ;; TRULY-THE allows transforms to take advantage of the type
+ ;; information without need for constraint propagation.
+ collect `(,type (,fun (truly-the ,type ,var))))))))
;;; Automate an idiom often found in macros:
;;; (LET ((FOO (GENSYM "FOO"))
dfd))
;;; Give names to elements of a numeric sequence.
-(defmacro defenum ((&key (prefix "") (suffix "") (start 0) (step 1))
+(defmacro defenum ((&key (start 0) (step 1))
&rest identifiers)
(let ((results nil)
(index 0)
(step (eval step)))
(dolist (id identifiers)
(when id
- (multiple-value-bind (root docs)
+ (multiple-value-bind (sym docs)
(if (consp id)
(values (car id) (cdr id))
(values id nil))
- (push `(def!constant ,(symbolicate prefix root suffix)
+ (push `(def!constant ,sym
,(+ start (* step index))
,@docs)
results)))