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pub enum Access<'a, T> {
Dense(&'a dyn DenseAccess<T>),
Sparse(&'a dyn SparseAccess<T>),
}
pub trait Matrix<T> {
fn rows(&self) -> usize;
fn cols(&self) -> usize;
fn access(&self) -> Access<T>;
}
pub trait DenseAccess<T>: Matrix<T> {
fn fetch_single(&self, row: usize, col: usize) -> T;
}
pub trait SparseAccess<T>: Matrix<T> {
fn nnz(&self) -> usize;
fn fetch_triplets(&self) -> Vec<(usize, usize, T)>;
}
impl<T, X> Matrix<T> for &X
where
X: Matrix<T>,
{
fn rows(&self) -> usize {
X::rows(*self)
}
fn cols(&self) -> usize {
X::cols(*self)
}
fn access(&self) -> Access<T> {
X::access(*self)
}
}
impl<T, X> DenseAccess<T> for &X
where
X: DenseAccess<T>,
{
fn fetch_single(&self, row: usize, col: usize) -> T {
X::fetch_single(*self, row, col)
}
}
impl<T, X> SparseAccess<T> for &X
where
X: SparseAccess<T>,
{
fn nnz(&self) -> usize {
X::nnz(*self)
}
fn fetch_triplets(&self) -> Vec<(usize, usize, T)> {
X::fetch_triplets(&self)
}
}