[stdlib] CollectionOfOne.subscript: Replace setter with _modify #19952
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@swift-ci test |
airspeedswift
approved these changes
Oct 19, 2018
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I wonder if there should be a test added across the board for all these types that checks in-place modification is happening. |
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CollectionOfOneis aMutableCollection; implementing_modifymakes it provide direct access to its element, which can be of some benefit.