bpo-40170: PyType_SUPPORTS_WEAKREFS() becomes a regular function by vstinner · Pull Request #30938 · python/cpython
Convert the PyType_SUPPORTS_WEAKREFS() macro to a regular function. It no longer access the PyTypeObject.tp_weaklistoffset member directly. Add _PyType_SUPPORTS_WEAKREFS() static inline functions, used internally by Python for best performances.
vstinner
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