Re: [boost] review request: addition to type_traits library of is_less_comparable<T, U> and others

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If you really want to support the "don't care" case for a return type, use has_operator_less<T, dont_care> where "dont_care" is a special placeholder type that you define (could use a better name though?).

I like the idea and the name, though perhaps "any" would work, too.

Doesn't that potentially get confused with boost::any ? John.