Hi Paul,
for some reason gmail insists in putting all your emails in the spam folder...
On Wed, Jun 24, 2015 at 3:55 AM, Paul Fultz II
I came up with the trick when trying to implement an emulation of N3617 (Lifting overload sets into function objects). Turns out that implementing the 'quote' syntax is almost trivial in C++14 with generic lambdas, but making it constexpr reliably has so far eluded me as all implementations I have tried ICE both gcc and clang. Still the constexpr lambda emulation itself seems to work.
So it ICEs when doing constexpr lambda emulation to lift overloads?
yes. The non-constexpr implementation works fine. But to enable constexpr, even with the trick above, you need to jump to a few levels of nested lambdas to handle SFINAE and both GCC 5 nor clang 3.5 ICE or fail to compile in all variation I have tried. I need to try a more recent version of clang. -- gpd