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For Swift, a lot of the designs were due to the ability to automatically transform Objective-C apis into swift APIs. The big issue from what i can tell is in ex

For Swift, a lot of the designs were due to the ability to automatically transform Objective-C apis into swift APIs. The big issue from what i can tell is in extracting the first parameters name from the method name automatically.

mikeash 11y ago
That doesn't really explain the defaults, though. Translation could override the defaults if that fit better. This already happens when translating C functions, as none of the parameters get external names.