Rob,

On Wed, Nov 21, 2012 at 6:39 AM, Robert Jones <robertgbjones@gmail.com> wrote:

Can the last line, labelled NOT Ok, be made to work? I think the lambda does

not publish its result as a bind does, so I suspect it's hopeless. Any thoughts?

// NOT Ok
boost::range::push_back( out, in | transformed( []( S & s ) { return s.i; } ) );
}

It seems trivial to have a nested result_type in all cases with a lambda. However, in C++11 there's no need for it due to decltype.

Sadly, some compilers fall into a gap where result_of (boost or std) doesn't use decltype and lambdas don't publish tr1-style result_type -- leaving code like the above in the lurch.

Michel Morin wrote some code for adapting such a case which may be of interest to you: http://lists.boost.org/boost-users/2012/01/72879.php

Right, thank you for that informative explanation. So, several solutions, non perfect. Choose

your poison!

- Rob.