Draft proposal: allow the use of relational operators on Comparable classes

[Alex Miller]

Kevin Bourrillion <kevinb at google.com> said:

> But focusing on enum types sidesteps one set of problems in favor of
> another.  That being that most user-defined enum types do not actually have
> any logical order, and many that _seem_ to have an order do not actually
> have that order guaranteed.

I would love to have the relational operators on enums...when it makes sense.  What if there was a marker interface that your enum could implement?  Something like OrderedEnum?

I suppose it might be bad form to have the language behavior as to whether something is legal be dependent on a marker interface.  But you guys are the experts.

Alex