/**
* Collects an IEnumerable of Squares, starting with the first square away from the startingSquare in the
* specified direction, and continuing in that direction until it hits an occupied square (which is also
* returned), or until the edge of the board if no occupied square is hit.
*/
public IEnumerable <Square> GetLineInDirectionUpToBlockingPiece(Square startingSquare, Direction direction)
{
Square nextSquare = startingSquare.GetRelativeSquare(direction, 1);
while (true)
{
if (!ContainsSquare(nextSquare))
{
yield break;
}
yield return(nextSquare);
if (!SquareIsEmpty(nextSquare))
{
yield break;
}
nextSquare = nextSquare.GetRelativeSquare(direction, 1);
}
}