On 27 May 2015 at 20:29, Eduardo Piombino wrote: > Hi. > > I'm currently using __builtin_types_compatible_p basically for > determining if the passed value is an array in the following manner: > > #define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b)) > #define __is_array(a) (__same_type((a), &(a)[0]) == 0) > > This way the __is_array() tells me if im dealing with an array or a > bare pointer: > > char dest[10]; > char * p; > > __is_array(dest) would evaluate to 1, while __is_array(p) would > evaluate to 0, allowing me to raise a warning or an assert at compile > time. You don't need any bultins for C++: static_assert( std::is_array<decltype(dest)>::value, "dest is an array" ); static_assert( !std::is_array<decltype(p)>::value, "p is not an array" );
