Keith Owens <[EMAIL PROTECTED]>:
> On Wed, 14 Nov 2001 12:07:32 -0500,
> "Eric S. Raymond" <[EMAIL PROTECTED]> wrote:
> >OK. I can do that. How are you going to condition the value on an
> >architecture, though? Is your derivation going to look something like this?
> >
> >derive MYVAR from (X86 ? "a" : (PPC ? "b" : (ARM ? "c" : "x")))
> >
> >That would be workable but ugly, and increasingly fragile as the number
> >of architectures goes up. Can you imagine a better solution?
>
> Split it over multiple lines and drop ()?
>
> derive MYVAR from
> X86 ? "a" :
> PPC ? "b" :
> ARM ? "c" :
> "default"
>
> Or allow the else clause to be empty, meaning ignore. Empty clauses
> are dropped from the theorem prover.
>
> derive MYVAR from (X86 ? "a" : )
> derive MYVAR from (PPC ? "b" : )
> derive MYVAR from (ARM ? "c" : )
That doesn't solve your problem, I don't think. To do what you told me
you wanted, you're going to need to be able to write conditional declarations
for the same symbol in different architecture files. Have you seen John
Cowan's proposal on this?
--
<a href="http://www.tuxedo.org/~esr/";>Eric S. Raymond</a>
As war and government prove, insanity is the most contagious of
diseases.
-- Edward Abbey
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