CLHS: Function WRITE-SEQUENCE

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Function WRITE-SEQUENCE

Syntax:

write-sequence sequence stream `&key` start end => sequence

sequence---a sequence.

stream---an output stream.

start, end---bounding index designators of sequence. The defaults for start and end are `0` and nil, respectively.

Description:

write-sequence writes the elements of the subsequence of sequence bounded by start and end to stream.

Examples:

     (write-sequence "bookworms" *standard-output* :end 4)
     >>  book
     =>  "bookworms"

Side Effects:

Modifies stream.

Affected By: None.

Exceptional Situations:

Should be prepared to signal an error of type type-error if sequence is not a proper sequence. Should signal an error of type type-error if start is not a non-negative integer. Should signal an error of type type-error if end is not a non-negative integer or nil.

Might signal an error of type type-error if an element of the bounded sequence is not a member of the stream element type of the stream.

See Also:

Section 3.2.1 (Compiler Terminology), read-sequence, write-string, write-line

Notes:

write-sequence is identical in effect to iterating over the indicated subsequence and writing one element at a time to stream, but may be more efficient than the equivalent loop. An efficient implementation is more likely to exist for the case where the sequence is a vector with the same element type as the stream.

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