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[SR-3761] Conform collections, optionals of Equatable to be Equatable #46346

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airspeedswift opened this issue Jan 27, 2017 · 1 comment
Closed

[SR-3761] Conform collections, optionals of Equatable to be Equatable #46346

airspeedswift opened this issue Jan 27, 2017 · 1 comment
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affects ABI Flag: Affects ABI conditional conformances Feature → protocol → conformances: conditional conformances good first issue Good for newcomers improvement standard library Area: Standard library umbrella swift evolution implemented Flag → feature: A feature that was approved through the Swift evolution process and implemented

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@airspeedswift
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Previous ID SR-3761
Radar rdar://problem/20715566
Original Reporter @airspeedswift
Type Improvement
Status Resolved
Resolution Done
Additional Detail from JIRA
Votes 2
Component/s Standard Library
Labels Improvement, AffectsABI, StarterProposal
Assignee None
Priority Medium

md5: 6d3cdb1a04d43783843b631ae5d8ce00

Issue Description:

Arrays and Optionals currently have a definition of ==, but do not conform to Equatable. Conditional conformance should enable this. This should also enable arrays of optionals, arrays of arrays etc to also be equated.

A proposal is needed for this. One thing to consider during the evolution process is whether all such Collection s should be Equatable, with collections that need special treatment because they are unordered, e.g. Set or Dictionary to opt-out of the default and implement their own.
@huonw
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huonw mannequin commented Apr 5, 2018

This was proposed and accepted in https://github.com/apple/swift-evolution/blob/master/proposals/0143-conditional-conformances.md#standard-library-adoption, and implemented. The radar is closed so let's do the same for this one.

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@AnthonyLatsis AnthonyLatsis added conditional conformances Feature → protocol → conformances: conditional conformances good first issue Good for newcomers swift evolution implemented Flag → feature: A feature that was approved through the Swift evolution process and implemented and removed StarterProposal labels Nov 11, 2022
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Labels
affects ABI Flag: Affects ABI conditional conformances Feature → protocol → conformances: conditional conformances good first issue Good for newcomers improvement standard library Area: Standard library umbrella swift evolution implemented Flag → feature: A feature that was approved through the Swift evolution process and implemented
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