[m-dev.] for review: improvements for record syntax
Simon Taylor
stayl at cs.mu.OZ.AU
Sat Dec 9 11:17:04 AEDT 2000
Ralph Becket wrote:
> >From Fergus Henderson on 08/12/2000 05:51:19
> > I'd still like to hear Ralph's opinion, to see if he too is convinced
> > by this argument.
>
> So far we have:
> policy (1) where X ^ f(Y, Z) is sugar for f(X, Y, Z) and
> policy (2) where X ^ f(Y, Z) is sugar for f(Y, Z, X)
>
> The `horridness' associated with (1) is based on a false premise,
> namely that
> > So `Y = f(A), X ^ Y' means `Y = f(A), Y(X)', i.e. `f(A)(X)' or `f(A, X)',
> > not `f(X, A)'.
> In the first place, Y = f(A), X ^ Y should expand to f(A)(X), *not* f(A, X).
Why are they not equivalent?
> So, (a), (b) and (c) are all different things. Policy (2) does *not*
> provide that `X ^ f(Y)' = `F = f(Y), X ^ F' as is claimed (as far as
> I've understood the discussion).
I don't understand how you reached that conclusion.
Simon.
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