Quiz · 4 questions

🌉 C Inside Swift 6

How a Swift 6 app paints with a C engine it never edits

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Quiz

01Why can libmypaint cast its MyPaintSurface* to MyPaintTiledSurface*, and Ariandel cast that on to ArdSurface*, without either side knowing the other's fields?

02BrushSurface's tile callbacks are top-level private functions rather than closures that capture the store. Why?

03With no tip set, what does shaped_draw_dab do with a dab libmypaint asks for?

04What does FrozenTile's @unchecked Sendable conformance actually rest on?

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