On Jul 11, 2016, at 4:23 PM, Mark Hamburg <[email protected]> wrote:
> 
> A bigger problem is that the requirement that something be equatable or the 
> property that a type is not equatable becomes a hidden part of the interface.

So, here is a more harsh suggestion: if a type can't be locally proven 
equatable, then it is not equatable.

This would break a lot of programs that use equality and inequality, but many 
of those programs are arguably runtime errors waiting to happen.

Mark

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