Make Attachment always conform to CustomStringConvertible.
#1367
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This PR ensures that `Attachment` conforms to `CustomStringConvertible` even if the value it wraps is non-copyable. We accomplish this by creating a new helper function that is able to box an arbitrary `~Copyable` value in `Any` if its type is actually `Copyable`. (This requires a newer runtime on Apple platforms, so we fall back to a generic (`~Copyable`) implementation on older macOS/iOS/etc.) We then call this helper function in `Attachment.description` and if it returns a value, we can stringify it.
grynspan
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jerryjrchen
approved these changes
Oct 16, 2025
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We already have test coverage, yes. |
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Holding for @stmontgomery to look at. |
stmontgomery
approved these changes
Oct 20, 2025
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This PR ensures that
Attachmentconforms toCustomStringConvertibleeven if the value it wraps is non-copyable. We accomplish this by creating a new helper function that is able to box an arbitrary~Copyablevalue inAnyif its type is actuallyCopyable. (This requires a newer runtime on Apple platforms, so we fall back to a generic (~Copyable) implementation on older macOS/iOS/etc.) We then call this helper function inAttachment.descriptionand if it returns a value, we can stringify it.Checklist: