Pitch #2: Extend Property Wrappers to Function and Closure Parameters

Evolution Pitches
12

Can the transformation be restricted to the function body, so that adding/removing @Percentage doesn't break ABI?

I thought about this a little bit originally, but there are some issues with this approach:

  1. This limits the ability for overload resolution to choose init(wrappedValue:) based on the type of the argument passed, rather than the parameter type.
  2. This prevents us from being able to extend the feature to enable the call-site to pass a projected value or the backing wrapper directly.
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