Returning an array of links from a const member function

Question

How to return an array reference from a const function?

class State{
    Chips (&arr() const)[6][7] { return arr_; }
    Chips val() const { return val_; }
}

Incorrect initialization of a link of type 'Chips (&) [6] [7]' from an expression of type 'const Chips [6] [7]'

Thank.

Answer 1

, arr_ (, , ), . arr arr_ const Chips[6][7]. Chops (&)[6][7], const-correctness. , , const

...
const Chips (&arr() const)[6][7] { return arr_; }
...

typedef

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typedef Chips Chips67[6][7];
const Chips67 &arr() const { return arr_; }
...

Answer 2

. ,

Chips* arr() const;

, .