Overloading double subscript operator of std::array

Asked Jan 23 '18 at 14:01

Active Jan 23 '18 at 14:01

Viewed 142 times

I like to store a 3x3 Matrix as a std::array<double,9>. Furthermore, I like to overload the [][] operator, in order to access a component of the matrix like

using matrix = std::array<double,9>

matrix A {1,2,3,4,5,6,7,8,9};
double A_11 = A[1][1];

I could easily wrap my matrix in a class and write a getter method like

double Matrix::get_component(int i, int j) {
    return A[3*i+j];
}

Nevertheless, this would spoil the readability of the code. I read this answer to a similar question, but I don't know how to adapt this to a fixed size std::aray.

asked Jan 23 '18 at 14:01

schorsch312

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Does it provide a satisfactory solution to you: https://stackoverflow.com/a/48297703/5470596 ? – YSC Jan 23 '18 at 14:02
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There is no double-subscript operator. What you show is two separate subscript operators, one applied to the result of the other. – John Bollinger Jan 23 '18 at 14:02
Don't overload anything in std namespace. Make your own struct. – user202729 Jan 23 '18 at 14:09
(unless it's explicitly allowed by c++ standard, or it's not release code) – user202729 Jan 23 '18 at 14:10

Overloading double subscript operator of std::array

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