Hi, In a metal shader I have a user-defined struct with a square brackets operator. This is a simplified version of it: struct MyData { float data[12]; float operator[](int i) const { return data[i]; } }; I pass a device buffer of that type in a compute kernel function: device const MyData* myDataBuffer Using the operator with a thread-space object works fine: MyData data_object = myDataBuffer[0]; float x = data_object[0]; // ok ..but trying to use it with the device-space buffer fails: float x = myDataBuffer[0][0]; // compilation error No viable overloaded operator[] for type 'const device MyData' Candidate function not viable: address space mismatch in 'this' argument ('const device MyData'), parameter type must be 'const MyData' For other operators I could define the function outside the struct and pass a reference to a device-memory object but the function for the square brackets operator can only be a member function. Am I missing something that could make the above statement compile?