VHDL physical types are nothing more than annotated integers. Making them completely useless for general arithmetic. You could not use them for converting from

VHDL physical types are nothing more than annotated integers. Making them completely useless for general arithmetic. You could not use them for converting from say Celsius to Fahrenheiht. It's cute that you bring up Boost which contains everything and the kitchen sink as evidence of "widely used". Show me a 3d engine that uses physical units for distance calculations. No one does it because it is a horrible idea.