std::array
is an aggregate. It has no user defined constructors.
From the C++ Standard
1 An aggregate is an array or a class (Clause 9) with no user-provided constructors (12.1), no private or protected non-static data members (Clause 11), no base classes (Clause 10), and no virtual functions (10.3).
class inherit is not an aggregate because it has a base class. So it may not use the brace initialization (except an empty initializer list). You should explicitly define constructors for class inherit if you want to initialize it with a non empty initializer list,