CLHS: Function STREAM-EXTERNAL-FORMAT

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Function STREAM-EXTERNAL-FORMAT

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>

Side Effects: None.

Affected By: None.

Exceptional Situations: None.

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.

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