Brian Mastenbrook scripsit:

> But, of course, I don't think it *is* reasonable to expect IEEE  
> doubles. Implementations which use IEEE singles don't provide any more  
> exact precision than 24-bit fixnums. This is the much more likely  
> scenario in a small Scheme.

Only if they run on chips too small or too low-power to do floating
point at all.  Even ARM systems, though not all ARM chips, have FP.

> [...] and begins to sound like an exercise in defending your favorite
> R5RS implementation [...]

In defending its legitimacy, not as an implementation of R5RS (which it
is) but going forward.

-- 
What has four pairs of pants, lives             John Cowan
in Philadelphia, and it never rains             http://www.ccil.org/~cowan
but it pours?                                   [email protected]
        --Rufus T. Firefly

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