Shiro Kawai scripsit:

> Looks good, but I still want the document to emphasize that
> the portable program should assume string-append! can be
> no more efficient as string-append.   (Of course it's fine
> to use it on implementations on which you know string-append!
> is more efficient.  It's just that you can't count on it
> in general.)

+1.

BTW, the non-first arguments of string-append! presumably have to
be strings, not arbitrary Scheme values.

--
John Cowan          http://www.ccil.org/~cowan        xxxxxx@ccil.org
What is the sound of Perl?  Is it not the sound of a [Ww]all that people
have stopped banging their head against?  --Larry