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void (ClassName::*memFuncPtr)(int) = &ClassName::memberFunction;
void* ptr = reinterpret_cast<void*>(memFuncPtr);

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char serializedData[sizeof(void*)];
memcpy(serializedData, &ptr, sizeof(void*));

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void* deserializedPtr;
memcpy(&deserializedPtr, serializedData, sizeof(void*));
void (ClassName::*deserializedMemFuncPtr)(int) = reinterpret_cast<void (ClassName::*)(int)>(deserializedPtr);

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ClassName obj;
(obj.*deserializedMemFuncPtr)(42);

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