fn find_flippable_around(
        board: &Board,
        start: Loc,
        cell: Cell,
    ) -> impl Iterator<Item = Loc> + '_ {
        const OFFSETS: [(isize, isize); 8] = [
            (-1, -1),
            (-1, 0),
            (-1, 1),
            (0, -1),
            (0, 1),
            (1, -1),
            (1, 0),
            (1, 1),
        ];

        let offsets: &[(isize, isize)] = if board[start] != Cell::Empty {
            &[(0isize, 0isize); 0]
        } else {
            &OFFSETS
        };

        offsets.iter().flat_map(move |&(dx, dy)| {
            let candidates = board.cells_from(start, dx, dy).skip(1);
            Movement::find_flippable(board, cell, candidates)
        })
    }
/// Returns an iterator over all locations on the board that would be flipped
/// by placing 'cell' and 'start'. If the location indicated is not empty
/// this returns an empty vector.
Returns an iterator over all locations on the board that would be flipped
by placing 'cell' and 'start'. If the location indicated is not empty
this returns an empty vector.
Returns an iterator over all locations on the board that would be flipped by placing ' cell ' and ' start ' . If the location indicated is not empty this returns an empty vector .
fn find_flippable_around(
        board: &Board,
        start: Loc,
        cell: Cell,
    ) -> impl Iterator<Item = Loc> + '_ {
        const OFFSETS: [(isize, isize); 8] = [
            (-1, -1),
            (-1, 0),
            (-1, 1),
            (0, -1),
            (0, 1),
            (1, -1),
            (1, 0),
            (1, 1),
        ];
        let offsets: &[(isize, isize)] = if board[start] != Cell::Empty {
            &[(0isize, 0isize); 0]
        } else {
            &OFFSETS
        };
        offsets.iter().flat_map(move |&(dx, dy)| {
            let candidates = board.cells_from(start, dx, dy).skip(1);
            Movement::find_flippable(board, cell, candidates)
        })
    }
fn find_flippable_around ( board : & Board , start : Loc , cell : Cell , ) -> impl Iterator < Item = Loc > + ' _ { const OFFSETS : [ ( isize , isize ) ; 8 ] = [ ( - 1 , - 1 ) , ( - 1 , 0 ) , ( - 1 , 1 ) , ( 0 , - 1 ) , ( 0 , 1 ) , ( 1 , - 1 ) , ( 1 , 0 ) , ( 1 , 1 ) , ] ; let offsets : & [ ( isize , isize ) ] = if board [ start ] != Cell :: Empty { & [ ( 0isize , 0isize ) ; 0 ] } else { & OFFSETS } ; offsets . iter ( ) . flat_map ( move | & ( dx , dy ) | { let candidates = board . cells_from ( start , dx , dy ) . skip ( 1 ) ; Movement :: find_flippable ( board , cell , candidates ) } ) }
Returns an iterator over all locations on the board that would be flipped
by placing 'cell' and 'start'.
Returns an iterator over all locations on the board that would be flipped by placing ' cell ' and ' start ' .
board
&Board
start
Loc
cell
Cell
board
&Board
start
Loc
cell
Cell