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Subject: Re: [boost] review request: addition to type_traits library of is_less_comparable<T, U> and others
From: Stewart, Robert (Robert.Stewart_at_[hidden])
Date: 2009-10-09 12:29:22

Frédéric Bron wrote:
> > what about:
> > is_less_than_comparable and has_operator_less_than
> > first check for existance and bool compliance, second check
> > for existence only
> Sounds very good to me.
> has_operator_less_than or has_less_than_operator?

I agree that splitting those is useful. has_operator_less_than is more consistent with C++ syntax: operator <.

If we (can) add functionality to deduce the operator's return type, then I think you'd need something like result_of_operator_less_than<T,U>::type. Given that, one can check it against void, bool, tribool, or anything else of interest.

Rob Stewart robert.stewart_at_[hidden]
Software Engineer, Core Software using std::disclaimer;
Susquehanna International Group, LLP

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