HelenOS sources

is_convertible    261 uspace/lib/cpp/include/__bits/memory/unique_ptr.hpp         struct is_convertible_array: is_convertible<From(*)[], To(*)[]>
is_convertible    865 uspace/lib/cpp/include/__bits/type_traits/type_traits.hpp     inline constexpr bool is_convertible_v = is_convertible<From, To>::value;