make-two-way-stream - ANSI Common Lisp

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make-two-way-stream (Function)

Syntax:

— Function: make-two-way-stream input-stream output-stream → two-way-stream

Arguments and Values:

input-stream—a stream.

output-stream—a stream.

two-way-stream—a two-way stream.

Description:

Returns a two-way stream that gets its input from input-stream and sends its output to output-stream.

Examples:

 (with-output-to-string (out)
    (with-input-from-string (in "input...")
      (let ((two (make-two-way-stream in out)))
        (format two "output...")
        (setq what-is-read (read two))))) → "output..."
 what-is-read → INPUT...

Exceptional Situations:

Should signal an error of type type-error if input-stream is not an input stream. Should signal an error of type type-error if output-stream is not an output stream.