[cxx-interop] Diagnose Escapable C++ types with non-escapable fields #80671
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…elds Explanation: In Swift, Escapable types cannot have non-escapable stored properties. Unfortunately, these checks could be circumvented via C++ interop, constructing invalid Swift code. This patch errors out on importing C++ code of this shape. Issue: rdar://148899224 Risk: Low, the fix is fairly targeted to the affected scenario. Testing: Added tests to test suite Original PR: #80671 Reviewer: John Hui
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rdar://148899224