[Bug c++/86652] pointer to function type cannot have 'const' qualifier

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86652

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This seems like the const is applying to the function (not the function type
that it is returning).