Unconditionally conform Attachment to CustomStringConvertible.
#1343
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This PR adjusts `Attachment`'s conformance to `CustomStringConvertible` such that it conforms even when `AttachableValue` is not `Copyable`. We now check at runtime (by way of protocol shenanigans, of course) whether the attachable value is copyable and, if so, take a different code path than we take if it does not conform.
grynspan
requested review from
briancroom,
suzannaratcliff and
jerryjrchen
as code owners
grynspan
added
public-api
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This PR adjusts
Attachment's conformance toCustomStringConvertiblesuch that it conforms even whenAttachableValueis notCopyable. We now check at runtime (by way of protocol shenanigans, of course) whether the attachable value is copyable and, if so, take a different code path than we take if it does not conform.Checklist: