[Bug libstdc++/69769] arithmetic operation on pointer to a function

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69769

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Wolfgang Roehrl from comment #0)
> The compiler accepts this programm despite of performing an arithmetic
> operation on pointer to a function.

Arithmetic on (non-atomic) function pointers is supported by GCC:
https://gcc.gnu.org/onlinedocs/gcc/Pointer-Arith.html

So this is consistent with the built-in types.