Fixing opEquals and opCmp
Simen Kjærås via Digitalmars-d
digitalmars-d at puremagic.com
Sat May 13 16:29:38 PDT 2017
On Saturday, 13 May 2017 at 14:17:24 UTC, H. S. Teoh wrote:
> Andrei specifically stated before that opCmp may model a
> partial order, i.e., returning 0 may indicate "not comparable"
> rather than "equal". And this is why opEquals is necessary: to
> distinguish between "not comparable" and "equal".
As others have pointed out, that seems wrong. However, returning
float.nan does make a bit of sense. Given a nan return value, a
<= b and a >= b will both be false.
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