acmp again !
brian.goetz at oracle.com
Thu Feb 21 13:33:06 UTC 2019
> NaN is interesting because it creates another corner case where the == will be surprising if it's implemented has a component wise comparison,
> value record Box(double value);
> var box = new Box(Double.NaN);
> box == box // false
> so both semantics are not reflective.
Go re-read the definition of substitutibility, you'll see that indeed it
is reflexive. (Even though `==` on double is not.) So you'll need to
find another counterexample :)
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