[r6rs-discuss] Proposed features for small Scheme, part 4E: cond-expand

[John Cowan]

Peter Bex scripsit:

> These sound useful, but are they available on, say a system which
> runs on top of Java or another VM?  Or would that VM _be_ the "CPU"?

I'll add jvm, clr, and llvm to the list.  Such a list is inevitably
open-ended anyhow.

> Also, I propose to add big-endian and little-endian to that list.

I'm not even sure why I left them out, though they belong on a different
list.  The JVM and CLR make it impossible to determine (short of native
code) what the underlying byte order is, however, so some systems will
have neither.

> How useful is this?  I've seen code that checks if a certain minimum
> version of an implementation is in use, but the precise version isn't
> *that* useful in cond-expand (except maybe in rare cases where only
> that version is known to contain a critical bug which needs to be
> worked around).

That's what I had in mind.

-- 
Go, and never darken my towels again!           John Cowan
        --Rufus T. Firefly                      http://ccil.org/~cowan