(if necessary slicing the fixed sized matrix into a dynamic
array of dynamic arrays).
It's not hard to convert a fixed sized matrix into this run-time
value that requires no templating on the sizes and requires no
slicing and no heap allocations inside the template function that
performs just the compile-time tests:
struct Mat2D(T) {
T* ptr;
size_t nrows, ncols;
// + indexing methods
}
Using something like that the matrix multiplication function I've
shown becomes just a shell that calls a function that accepts two
Mat2D and is templated only on T.
Bye,
bearophile
