Re: [boost] [Review:Algorithms] Order of args to clamp

I think that it is reasonable to compare different types. One example is chrono::duration. You can compare durations with a different Period.

Yes, but these are related types: they share a common type. In fact, they explicitly share a common type (common_type is specialized for durations). I think its reasonable to define < for common types. Also ==, +, and *.