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- /// Modifies a function body in a view implementation to automatically
- /// cast a backend instance.
- ///
- /// This is for internal SCUI use and should not be exposed publicly -- the
- /// macro is not especially robust and only performs minimal checking.
- ///
- /// This macro expects to be attached to a `func` declaration with a parameter
- /// named `backend`. It will also recognize a parameter named `widget` and will
- /// insert the appropriate cast.
- ///
- /// - Parameters:
- /// - backendGenericName: The name of the generic parameter to the inner
- /// function. If `nil`, one will be generated randomly.
- /// - returnsWidget: Whether the attached function returns a widget. If it
- /// does, the macro will insert an extra cast to make sure the correct
- /// widget type comes out.
- // @attached(body)
- // internal macro CastBackend<NewBackend>(
- // backendGenericName: String? = nil,
- // returnsWidget: Bool = false
- // ) = #externalMacro(module: "SwiftCrossUIMacrosPlugin", type: "CastBackendMacro")
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