Troubles extending a string...

From: Jeff (jma_at_insightbb.com)
Date: 08/24/04 

Date: 24 Aug 2004 11:58:50 -0700

Is there any way to append a string onto another string without using
CONCATENATE? The problem I am having is that I'm building a string,
character by character, using VECTOR-PUSH-EXTEND. However, this process
is recursive:

(defun build-string ()
(let ((s1 (create-adjustable-string-vector)))
(if (check-for-recursion)
(let ((s2 (build-string)))
(---> want to append s2 to s1 here <---))
s1)))

The algorithm (of course) is a little more complicated than this. My
initial attempt was to use CONCATENATE and just set 's1' to the return
value, but this fails later on, as the string returned by CONCATENATE
doesn't appear to be adjustable any more. Is there a way to append a
string in-place?

Thanks!

Jeff

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