From: Arkadiy Vertleyb (vertleyb_at_[hidden])
Date: 2006-05-09 21:28:10
"David Abrahams" <dave_at_[hidden]> wrote
> "Arkadiy Vertleyb" <vertleyb_at_[hidden]> writes:
> > "David Abrahams" <dave_at_[hidden]> wrote
> >> I can't ask my
> >> library's users to register types.
> > Don't you have to ask them to do something else, so that result_of
> No, we'd implement the necessary type computations to make result_of
> work. Remember, result_of takes types as inputs, not objects.
> result_of<bind_(std::minus<int>, int, _1_)>::type
> just requires that bind_ know about the types produced by boost::bind.
> And in
> result_of<minus_(int, _1_)>::type
> minus_ would just have to know how the operator- in the lambda library
However BOOST_TYPEOF, although does require user type registration, has an
advantage of much nicer syntax. Compare:
result_of<minus_(minus_(int, _1_), _2_)>::type f = 3 - _1 - _2;
BOOST_AUTO(f, 3 - _1 - _2);
It would be very nice to have lambda and bind types registered, so that the
user at least have a choise.
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