ETOperatorSpec

static struct S(T, size_t r, size_t c)
{
    enum rows = r;
    enum cols = c;
    T opIndex(size_t i, size_t j) const {return T.init;}
    alias at = opIndex;
}
alias Matrix2i = S!(int, 2, 2);

static assert(ETOperatorSpec!(Matrix2i, "+", Matrix2i) == ETOSpec.matrixAddMatrix);
static assert(ETOperatorSpec!(Matrix2i, "-", Matrix2i) == ETOSpec.matrixSubMatrix);
static assert(ETOperatorSpec!(Matrix2i, "*", Matrix2i) == ETOSpec.matrixMulMatrix);
static assert(ETOperatorSpec!(Matrix2i, "*", int) == ETOSpec.matrixMulScalar);
static assert(ETOperatorSpec!(int, "*", Matrix2i) == ETOSpec.scalarMulMatrix);