CLHS: Function GET-OUTPUT-STREAM-STRING

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Function GET-OUTPUT-STREAM-STRING

Syntax:

get-output-stream-string string-output-stream => string

Arguments and Values:

string-output-stream---a stream.

string---a string.

Description:

Returns a string containing, in order, all the characters that have been output to string-output-stream. This operation clears any characters on string-output-stream, so the string contains only those characters which have been output since the last call to get-output-stream-string or since the creation of the string-output-stream, whichever occurred most recently.

Examples:

     (setq a-stream (make-string-output-stream)
            a-string "abcdefghijklm") =>  "abcdefghijklm"
     (write-string a-string a-stream) =>  "abcdefghijklm"
     (get-output-stream-string a-stream) =>  "abcdefghijklm"
     (get-output-stream-string a-stream) =>  ""

Side Effects:

The string-output-stream is cleared.

Affected By: None.

Exceptional Situations:

The consequences are undefined if stream-output-string is closed.

The consequences are undefined if string-output-stream is a stream that was not produced by make-string-output-stream. The consequences are undefined if string-output-stream was created implicitly by with-output-to-string or format.

See Also:

make-string-output-stream

Notes: None.

The following X3J13 cleanup issues, not part of the specification, apply to this section:

- STRING-OUTPUT-STREAM-BASHING:UNDEFINED
- CLOSE-CONSTRUCTED-STREAM:ARGUMENT-STREAM-ONLY

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