[5.9][cxx-interop] add a SWIFT_MUTATING customization macro #66396
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Fixes swiftlang#66322 (cherry picked from commit b25dec5)
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@swift-ci please test |
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@swift-ci please test source compatibility |
DougGregor
approved these changes
Jun 6, 2023
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Fixes #66322
This macro is needed to allow users to annotate constant C++ member functions that do mutate the object, e.g. using a mutable C++ field. This annotation makes Swift import them as
mutatingmethods then. This allows users to call such constant functions from Swift without worrying about correctness of such a call invocation.