The later is correct. As of R2017b, MATLAB Coder does not support arrays of objects, so if your MATLAB code creates an array of objects, such as
x = [MyClass(1), MyClass(2)];
or
x = repmat(MyClass(1), [3 4]);
then code generation will fail with an error message (presuming that there is a class MyClass in your code).
The only workaround as of now is to use cell arrays of objects, that is,
x = {MyClass(1), MyClass(2)};
should compile fine.
