Printing all values in CoreStoreObject? #195

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opened 2025-12-29 18:24:14 +01:00 by adam · 1 comment

adam commented 2025-12-29 18:24:14 +01:00

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Originally created by @cdelaet on GitHub (Jan 12, 2018).

Would it be possible to make CoreStoreObject to implement CustomStringConvertible by default?
It would be nice if print(myCoreStoreObject) printed all keys and their values out of the box. I use that feature a lot to verify / debug my code.

Originally created by @cdelaet on GitHub (Jan 12, 2018). Would it be possible to make `CoreStoreObject` to implement `CustomStringConvertible` by default? It would be nice if `print(myCoreStoreObject)` printed all keys and their values out of the box. I use that feature a lot to verify / debug my code.

adam added the enhancement label 2025-12-29 18:24:14 +01:00

adam commented 2025-12-29 18:24:15 +01:00

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@Saklad5 commented on GitHub (May 6, 2020):

That’s not what CustomStringConvertible is for. You want CustomReflectable or CustomDebugStringConvertible (I’m not sure why that last one exists).

On a related note, Core Data documentation explicitly discourages overriding description to fire a fault. I implement TextOutputStreamable instead. In fact, I never add conformance to CustomStringConvertible directly, only through LosslessStringConvertible. TextOutputStreamable is more efficient, and takes priority for almost everything. It also doesn’t leave uselessly identical properties everywhere.

@Saklad5 commented on GitHub (May 6, 2020): That’s not what `CustomStringConvertible` is for. You want `CustomReflectable` or `CustomDebugStringConvertible` (I’m not sure why that last one exists). On a related note, Core Data documentation explicitly discourages overriding `description` to fire a fault. I implement `TextOutputStreamable` instead. In fact, I never add conformance to `CustomStringConvertible` directly, only through `LosslessStringConvertible`. `TextOutputStreamable` is more efficient, and takes priority for almost everything. It also doesn’t leave uselessly identical properties everywhere.

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Reference: starred/CoreStore-JohnEstropia#195