Workaround GNUC 5 throw constexpr bug
Workaround GNUC 5 throw constexpr bug

StackOverflow. Throw in constexpr function, http://stackoverflow.com/a/34280783/437272

decaf-emu/gsl-lite,martinmoene/gsl-lite,martinmoene/gsl-lite,decaf-emu/gsl-lite,martinmoene/gsl-lite