Re: [boost] Re: functors for taking apart std::pair?

From: Beman Dawes (bdawes_at_[hidden])
Date: 2003-07-14 08:07:35

At 06:15 PM 7/12/2003, Aleksey Gurtovoy wrote:

 >Brian McNamara wrote:
 >> If and when I get FC++ ( http://www.cc.gatech.edu/~yannis/fc++/ ) into
 >> Boost, FC++ has the same kind of selectors you've shown above (named
 >> "fst" and "snd", as in Haskell).  Whereas these function objects also
 >> cannot be used with STL algorithms requiring adaptables (for the reason
 >> you mention above), it can be used with the analogous algorithms in
 >> FC++, since the FC++ infrastructure enables return-type-deduction for
 >> template function objects.
 >
 >So do Boost.Lambda and Phoenix infrustructures, and unification of these
 >is proposed for the TR1 -
 >
 >http://anubis.dkuug.dk/jtc1/sc22/wg21/docs/papers/2003/n1454.html

A slight clarification:

N1454 isn't just "proposed"; it has been accepted by full committee vote:-)

It is possible for the full committee to reverse itself, and remove 
something that has previously been accepted. But that's fairly unusual, so 
you can expect N1454 to be in the TR.

--Beman