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On 02/18/2015 01:23 PM, Shiro Kawai wrote:
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.)
Right - but is that any different from string-set! - i.e. you can't count on string-set! being significantly more efficient that string-append/string-copy. And on implementations where string-append! requires a copy, there string-set! would have the same problem. So the place, if any, to mention this warning would seem to be R7RS .... On 02/18/2015 02:02 PM, cowan@xxxxxxxx wrote:
BTW, the non-first arguments of string-append! presumably have to be strings, not arbitrary Scheme values.
The draft says:
A value can be a character or a string.
--
--Per Bothner
per@xxxxxxxxxxx http://per.bothner.com/