Is it possible to create and initialize an array of values using template metaprogramming?

Question

I want to be able to create an array of calculated values (let\'s say for simplicity\'s sake that I want each value to be the square of it\'s index) at compile time using t

Answer 1

It's called Static Table Generation in metaprogramming.

#include 

const int ARRAY_SIZE = 5;

template 
class Table : public Table
{
public:
    static const int dummy;
};

template 
class Table
{
public:
    static const int dummy;
    static int array[N];
};

template 
const int Table::dummy = Table::array[I] = I*I + 0*Table::dummy;

template 
int Table::array[N];

template class Table;

int main(int, char**)
{
    const int *compilerFilledArray = Table::array;
    for (int i=0; i < ARRAY_SIZE; ++i)
        std::cout<

We use explicit template instantiation and a dummy variable to force the compiler to fill the array with index squares. The part after I*I is the trick needed to recursively assign each array elements.