;;; user is responsible for some of the protocol implementation, it's
;;; not necessarily a bug in SBCL itself if we fall through to one of
;;; these default methods.
+;;;
+;;; FIXME: there's a lot of similarity in these Gray stream
+;;; implementation generic functions. All of them could (maybe
+;;; should?) have two default methods: one on STREAM calling
+;;; BUG-OR-ERROR, and one on T signalling a TYPE-ERROR.
(defmacro bug-or-error (stream fun)
- `(error "~@<The stream ~S has no suitable method for ~S, ~
- and so has fallen through to this method. If you think that this is ~
- a bug, please report it to the applicable authority (bugs in SBCL itself ~
- should go to the mailing lists referenced from <http://www.sbcl.org/>).~@:>"
- ,stream ,fun))
-
+ `(error
+ "~@<The stream ~S has no suitable method for ~S, ~
+ and so has fallen through to this method. If you think that this is ~
+ a bug, please report it to the applicable authority (bugs in SBCL itself ~
+ should go to the mailing lists referenced from ~
+ <http://www.sbcl.org/>).~@:>"
+ ,stream ,fun))
\f
(fmakunbound 'stream-element-type)
(defmethod input-stream-p ((stream ansi-stream))
(ansi-stream-input-stream-p stream))
-
+
+ (defmethod input-stream-p ((stream fundamental-stream))
+ nil)
+
(defmethod input-stream-p ((stream fundamental-input-stream))
t)
(error 'type-error :datum non-stream :expected-type 'stream)))
\f
(let ()
+ (fmakunbound 'interactive-stream-p)
+
+ (defgeneric interactive-stream-p (stream)
+ #+sb-doc
+ (:documentation "Is STREAM an interactive stream?"))
+
+ (defmethod interactive-stream-p ((stream ansi-stream))
+ (funcall (ansi-stream-misc stream) stream :interactive-p))
+
+ (defmethod interactive-stream-p ((stream fundamental-stream))
+ nil)
+
+ (defmethod interactive-stream-p ((stream stream))
+ (bug-or-error stream 'interactive-stream-p))
+
+ (defmethod interactive-stream-p ((non-stream t))
+ (error 'type-error :datum non-stream :expected-type 'stream)))
+\f
+(let ()
(fmakunbound 'output-stream-p)
(defgeneric output-stream-p (stream)
(defmethod output-stream-p ((stream ansi-stream))
(ansi-stream-output-stream-p stream))
+ (defmethod output-stream-p ((stream fundamental-stream))
+ nil)
+
(defmethod output-stream-p ((stream fundamental-output-stream))
t)
(defmethod stream-clear-input ((stream fundamental-character-input-stream))
nil)
+(defmethod stream-clear-input ((stream stream))
+ (bug-or-error stream 'stream-clear-input))
+(defmethod stream-clear-input ((non-stream t))
+ (error 'type-error :datum non-stream :expected-type 'stream))
(defgeneric stream-read-sequence (stream seq &optional start end)
(:documentation
(defmethod stream-finish-output ((stream fundamental-output-stream))
nil)
+(defmethod stream-finish-output ((stream stream))
+ (bug-or-error stream 'stream-finish-output))
+(defmethod stream-finish-output ((non-stream t))
+ (error 'type-error :datum non-stream :expected-type 'stream))
(defgeneric stream-force-output (stream)
#+sb-doc
(defmethod stream-force-output ((stream fundamental-output-stream))
nil)
+(defmethod stream-force-output ((stream stream))
+ (bug-or-error stream 'stream-force-output))
+(defmethod stream-force-output ((non-stream t))
+ (error 'type-error :datum non-stream :expected-type 'stream))
(defgeneric stream-clear-output (stream)
#+sb-doc
(defmethod stream-clear-output ((stream fundamental-output-stream))
nil)
+(defmethod stream-clear-output ((stream stream))
+ (bug-or-error stream 'stream-clear-output))
+(defmethod stream-clear-output ((non-stream t))
+ (error 'type-error :datum non-stream :expected-type 'stream))
(defgeneric stream-advance-to-column (stream column)
#+sb-doc
"Used by READ-BYTE; returns either an integer, or the symbol :EOF
if the stream is at end-of-file."))
+(defmethod stream-read-byte ((stream stream))
+ (bug-or-error stream 'stream-read-byte))
+(defmethod stream-read-byte ((non-stream t))
+ (error 'type-error :datum non-stream :expected-type 'stream))
+
(defgeneric stream-write-byte (stream integer)
#+sb-doc
(:documentation
"Implements WRITE-BYTE; writes the integer to the stream and
returns the integer as the result."))
+(defmethod stream-write-byte ((stream stream) integer)
+ (bug-or-error stream 'stream-write-byte))
+(defmethod stream-write-byte ((non-stream t) integer)
+ (error 'type-error :datum non-stream :expected-type 'stream))
+
;; Provide a reasonable default for binary Gray streams. We might be
;; able to do better by specializing on the sequence type, but at
;; least the behaviour is reasonable. --tony 2003/05/08.