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  ANSI Common Lisp   21 Streams   21.2 Dictionary of Streams

21.2.30 stream-external-format Function

Syntax:
stream-external-format stream    format

Arguments and Values:
stream - a file stream.

format - an external file format.

Description:
Returns an external file format designator for the stream.

Examples:
 (with-open-file (stream "test" :direction :output)
   (stream-external-format stream))
 :DEFAULT
OR:ISO8859/1-1987
OR(:ASCII :SAIL)
OR ACME::PROPRIETARY-FILE-FORMAT-17
OR#<FILE-FORMAT :ISO646-1983 2343673>

See Also:
the :external-format argument to the function open and the with-open-file macro.

Notes:
The format returned is not necessarily meaningful to other implementations.

Allegro CL Implementation Details:
None.

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