get_neighbors.rs

error[E0119]: conflicting implementations of trait `neighborhood::GetNeighbors<'_, usize, neumann::Neighbors<&_>>` for type `SquareGrid<_>`:
   --> src\neumann.rs:195:1
    |
177 | / impl<'a, C, S> GetNeighbors<'a, usize, Neighbors<&'a C>> for SquareGrid<S>
178 | | where
179 | |     S: Sim<Cell = C>,
180 | | {
...   |
192 | |     }
193 | | }
    | |_- first implementation here
194 |
195 | / impl<C, S> GetNeighbors<'static, usize, Neighbors<C>> for SquareGrid<S>
196 | | where
197 | |     S: Sim<Cell = C>,
198 | |     C: Clone,
...   |
202 | |     }
203 | | }
    | |_^ conflicting implementation for `SquareGrid<_>`

impl<'a, C, S> GetNeighbors<'a, usize, Neighbors<&'a C>> for SquareGrid<S>
where
    S: Sim<Cell = C>,
{
    fn get_neighbors(&'a self, ix: usize) -> Neighbors<&'a C> {
        Neighbors {
            up_left: self.get_cell(self.size() + ix - 1 - self.width),
            up: self.get_cell(self.size() + ix - self.width),
            up_right: self.get_cell(self.size() + ix + 1 - self.width),
            left: self.get_cell(self.size() + ix - 1),
            right: self.get_cell(self.size() + ix + 1),
            down_left: self.get_cell(self.size() + ix - 1 + self.width),
            down: self.get_cell(self.size() + ix + self.width),
            down_right: self.get_cell(self.size() + ix + 1 + self.width),
        }
    }
}

impl<C, S> GetNeighbors<'static, usize, Neighbors<C>> for SquareGrid<S>
where
    S: Sim<Cell = C>,
    C: Clone,
{
    fn get_neighbors(&self, ix: usize) -> Neighbors<C> {
        <Self as GetNeighbors<usize, Neighbors<&C>>>::get_neighbors(self, ix).cloned()
    }
}