Type promote the input arrays, returning new arrays with the shared
correct data type.
- Parameters:
x1 (Union
[Array
, NativeArray
]) – the first of the two arrays to type promote
x2 (Union
[Array
, NativeArray
]) – the second of the two arrays to type promote
- Return type:
Tuple
- Returns:
ret1, ret2 – The input arrays after type promotion