Equivalents to MSVC's _countof in other compilers?

Question

Are there any builtin equivalents to _countof provided by other compilers, in particular GCC and Clang? Are there any non-macro forms?

Answer 1

Update: C++ 17 support std::size() (defined in header )

You can use boost::size() instead:

#include 

int my_array[10];
boost::size(my_array);