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ANSI Common Lisp  17 Sequences 17.3 Dictionary of Sequences
- Syntax:
-
copy-seq
sequence
 copied-sequence
- Arguments and Values:
-
sequence - a proper sequence.
copied-sequence - a proper sequence.
- Description:
-
Creates a copy of sequence. The elements of the new
sequence are the same as the corresponding elements of
the given sequence.
If sequence is a vector,
the result is a fresh simple array
of rank one
that has the same actual array element type as sequence.
If sequence is a list,
the result is a fresh list.
- Examples:
-
(setq str "a string") "a string"
(equalp str (copy-seq str)) true
(eql str (copy-seq str)) false
- Exceptional Situations:
-
Should be prepared to signal an error of type type-error if sequence is not a proper sequence.
- See Also:
-
copy-list
- Notes:
-
From a functional standpoint,
(copy-seq x) ==(subseq x 0)
However, the programmer intent is typically very different in these two cases.
- Allegro CL Implementation Details:
-
None.
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