(defmacro with-input-from-string ((var string &key index start end) . body)
- (multiple-value-bind (ds b)
- (find-declarations body)
- `(let ((,var (make-string-input-stream ,string ,start ,end)))
- ,@ds
- (unwind-protect
- (progn ,@b)
- (when ,index (setf ,index (si:get-string-input-stream-index ,var)))
- (when ,var (close ,var))))))
-
+ (let ((x (sgen "X")))
+ (multiple-value-bind (ds b)
+ (find-declarations body)
+ `(let ((,var (make-string-input-stream ,string ,start ,end)))
+ ,@ds
+ (unwind-protect
+ ,(let ((f `(progn ,@b)))
+ (if index
+ `(let ((,x (multiple-value-list ,f))) (setf ,index (get-string-input-stream-index ,var)) (values-list ,x))
+ f))
+ (close ,var))))))
+
(defmacro with-output-to-string ((var &optional string &key element-type) . body)
- (multiple-value-bind (ds b)
- (find-declarations body)
- `(let ((,var ,(if string `(make-string-output-stream-from-string ,string) `(make-string-output-stream))))
- ,@ds
- (unwind-protect
- (progn ,@b ,@(unless string `((get-output-stream-string ,var))))
- (when ,var (close ,var))))))
+ (let ((s (sgen "STRING"))(bl (sgen "BLOCK"))(e (sgen "ELEMENT-TYPE"))(x (sgen "X")))
+ (multiple-value-bind (ds b)
+ (find-declarations body)
+ `(let* ((,s ,string)(,e ,element-type)
+ (,var (if ,s (make-string-output-stream-from-string ,s) (make-string-output-stream :element-type ,e))))
+ ,@ds
+ (unwind-protect
+ (let ((,x (multiple-value-list (progn ,@b)))) (if ,s (values-list ,x) (get-output-stream-string ,var)))
+ (close ,var))))))
(defun read-from-string (string