On Wed, Nov 28, 2012 at 7:35 PM, Nathan Crookston < nathan.crookston@gmail.com> wrote: [...]
With or without a change to result_of, I believe there's value in allowing the user to explicitly specify the result_type of a callable object passed to transformed. Ticket #7748[1] contains a patch which permits that.
Thanks, Nate
I would think a preferable (in the sense of separation of concerns, modularity, what-have-you) solution would be an addition to Boost.Functional (or whatever) that basically wraps a callable object and forces its result_type to be some specified template parameter. E.g., template< class F, class R > struct result_binder { F f; typedef R result_type; template< class... T > result_type operator()(T&&... x) const { return f(std::forward<T>(x)...); } }; template< class R, class F > result_binder<F,R> bind_result(F&& f) { return result_binder<F,R>{std::forward<F>(f)}; } [or something like that] - Jeff