5.10.2 Wrapper stream protocol

This section describes the protocol for implementing wrapper streams. For information on using wrapper streams, see Section 5.8 on page 52.

<wrapper-stream>

Open instantiable class

The class that implements the basic wrapper-stream functionality. A required init-keyword, inner-stream:, specifies the wrapped stream.

inner-stream

Open generic function

inner-stream wrapper-stream => wrapped-stream 

Returns the stream wrapped by wrapper-stream.

inner-stream-setter

Open generic function

inner-stream-setter stream wrapper-stream => stream 

Wraps stream with wrapper-stream. It does so by setting the inner-stream slot of wrapper-stream to stream, and the outer-stream slot of stream to wrapper-stream.

outer-stream

Open generic function

outer-stream stream => wrapping-stream 

Returns the stream that is wrapping stream.

outer-stream-setter

Open generic function

outer-stream-setter wrapper-stream stream => wrapper-stream 

Sets the outer-stream slot of stream to wrapper-stream.

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System and I/O Reference - 31 MAR 2000