Why dynamic array is InputRange but static array not.

[lili]

Hi:
   in phobos/std/range/primitives.d has this code
  ```
    static assert( isInputRange!(int[]));
    static assert( isInputRange!(char[]));
    static assert(!isInputRange!(char[4]));
    static assert( isInputRange!(inout(int)[]));
     ```
  but the dynamic array and static array neither not has 
popFront/front/empty.
https://dlang.org/spec/arrays.html#array-properties properties