On Tue, Dec 06, 2011 at 08:48:01AM +0100, Marijn wrote: > Couldn't help but wonder why they don't return the value of the last > body form, so I looked around a bit and both CLHS[1] and my racket > REPL seem to agree that they should: [...] > Is there some other source that suggests that the return value should > be unspecified?
This isn't so much because the return value is somehow specified or useful, but rather to avoid breaking tail position. See this discussion I had with Eli Barzilay where this is explained: http://rotty.yi.org/irclogs/freenode/%23scheme/2011-11-02/#e208 (Start at the 07:24 timestamp if the fragment reference isn't working.) Cheers, Chris.
