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Update: I have made a pull request to make the message more accurate :)

Hello Swift Forums,

currently, as known @IBInspectable & @GKInspectable are only to be used as instance properties of class types, however, when incorrectly used as instance properties in another type, the error only instance properties can be declared @IBInspectable / @GKInspectable is blurted out

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I believe the error message should be changed to reflect the attributes only being allowed to be used as class instance properties, say, only class instance properties can be declared @IBInspectable / @GKInspectable

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Seems like a good enhancement bug at Issues · apple/swift · GitHub.

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If no disagreements are presented in this thread, I’ll instead open a pull request to change the error message today or tomorrow

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Unless the error message is specific to IBInspectable, there will probably need to be more consideration than just changing the message.

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The error message is very well specific to IBInspectable and GKInspectable by looking at DiagnosticSema.def.

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Opened pull request: Change message of `invalid_iboutlet` and `invalid_ibinspectable` to reflect accurate usage by SerenaKit · Pull Request #59198 · apple/swift · GitHub

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