Re: [boost] Nasty compile time reflection and iteration for POD types using C++14 without macro

25 Mar 2016

      AMDG

On 03/25/2016 12:39 AM, Antony Polukhin wrote:
...
2016-03-25 2:03 GMT+03:00 Klemens Morgenstern :
...
That might also be a workaround for the REGISTER_TYPE thing in you magic
get, though I have to admit: I don't really get how this approach works, so
I don't know.
That won't help. I need a way to make conversion of T type to some
non-templated class and back:
T -> int -> T
Does any C++14 compiler allow the friend
function registration hack?

template<int I>
struct id_ {};

template
struct register_type {
    friend T lookup(id_<I>);
};

(I'm pretty sure that this won't work
on clang.)
...
TypeIndex allows only the first part of that: T -> type_index, but does not
allow type_index -> T
In Christ,
Steven Watanabe