ProtoObject and comparison for equality and ordering
Andrei Alexandrescu
SeeWebsiteForEmail at erdani.org
Wed May 15 00:15:38 UTC 2019
On 5/14/19 10:21 PM, Mike Franklin wrote:
> On Tuesday, 14 May 2019 at 20:36:08 UTC, Eduard Staniloiu wrote:
>
>> Should `opCmp` return a float?
>>
>> The reason: when we attempt to compare two types that aren't
>> comparable (an unordered relationship) we can return float.NaN. Thus
>> we can differentiate between a valid -1, 0, 1 and an invalid float.NaN
>> comparison.
>
> Thinking about this a little more, why would the compiler even allow
> comparing two types that aren't comparable? Shouldn't that be a
> compiler error?
Their dynamic types may be comparable.
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