[boost] Re: [iterator + lambda] transform_iterator and lambda expression

From: David Abrahams (dave_at_[hidden])
Date: 2004-06-04 10:15:50

Vladimir Prus <ghost_at_[hidden]> writes:

> Right. I think what is needed is *some* solution which would allow to
> explore FP, not necessary allow using FP in all situations. Perfect
> forwarding for 3 arguments looks fine.

FYI, "perfect forwarding" isn't possible in C++ as it stands:

     template <class T> int f(T&);

     template <class T> int g(T& x)  { return f(x); }
     template <class T> int g(T const&) { return f(x); }

     int x = f(1); // error
     int x = g(1); // OK

In "perfect forwarding", argument rvalue-ness is preserved.

-- 
Dave Abrahams
Boost Consulting
http://www.boost-consulting.com