newRPL: Angles revisited

[Han]

Something to consider:

When writing, we write from left to right (most of us). So when you write ∡90° 1 + --> ∡91° it makes sense as the angle appears "first", and one can easily deduce that the type of "first" argument takes precedence. However, on a stack, the data-value entered last is actually "first." While I don't really care either way, I just thought it might be something to consider when finalizing the type priority.

Also, is it safe to assume that the tag/unit gets dropped when used in operations that would normally either not make sense or not take angles as arguments? For example, what would ∡12° 2 ^ produce as a result? Should it be ∡144°, or perhaps some sort of "squared" angle if we are treating the value as a unit, or simply the number 144?