# A hashability problem

**URL:** <https://forums.swift.org/t/a-hashability-problem/38899>\
**Category:** Using Swift\
**Created:** [July 30, 2020, 5:31pm UTC](https://forums.swift.org/t/a-hashability-problem/38899 "2020-07-30T17:31:48Z")\
**Posts on this page:** 1\
**Showing post:** 28

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**Author:** ![Lantua](https://sea2.discourse-cdn.com/swift/user_avatar/forums.swift.org/lantua/32/8868_2.png) [@Lantua](https://forums.swift.org/u/Lantua)\
**Post date:** [August 2, 2020, 4:02pm UTC](https://forums.swift.org/t/a-hashability-problem/38899/28 "2020-08-02T16:02:39Z")

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To quote @jrose:

> [@An inheritance problem](https://forums.swift.org/t/an-inheritance-problem/38775/45):
>
> ...but today the way to spell "choose a particular (or alternate) conformance" in Swift is "use a wrapper type". I do think it should be easier to define and use such types, but Swift isn't unique here; I don't know of any languages with generics that _don't_ use wrapper types for this besides ML.

which should also apply equally as well here.

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