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

Daniel Wallin wrote:

David Abrahams wrote:

...

I brought up this issue a few weeks ago. I was thinking we should be able to write

rvalue(_1)

or maybe

cref(_1)

to pass rvalues.

The problem is that the BPL operator() looks like this:

template<class A0> R operator()(A0& a0)

AFAIK there's no way to insert a const there, other than providing the full 2^N overload set.

True. Any attempt to insert some metafunction in argument type, e.g: R operator()(const_if_requested<A0>::type a0) will break template argument deduction. - Volodya