pub fn genSteps(square: Chess.Square, piece: Chess.Figures, color: Chess.Colors) Chess.BoardType {

pub fn genSteps(square: Chess.Square, piece: Chess.Pieces, color: Chess.Colors) Chess.BoardType {

pub const Figures = enum {

pub const Pieces = enum {

    pub fn riderBlocker(self: @This(), square: Square, piece: Figures) BoardType {

    pub fn riderBlocker(self: @This(), square: Square, piece: Pieces) BoardType {

}
fn genRelevantOccupancy(piece: Pieces) [@typeInfo(Square).Enum.fields.len]BoardType {
    var ret: [64]BoardType = [_]BoardType{0} ** 64;
    for (std.enums.values(Square)) |square| {
        ret[@enumToInt(square)] = @popCount(Attacks.genSteps(square, piece, .white));
    }
    return ret;
}
test "genRelevantOccupancy" {
    { // bishop
        const bishop = genRelevantOccupancy(.bishop);
        // zig fmt: off
        const expected = [64]BoardType{
            6, 5, 5, 5, 5, 5, 5, 6,
            5, 5, 5, 5, 5, 5, 5, 5,
            5, 5, 7, 7, 7, 7, 5, 5,
            5, 5, 7, 9, 9, 7, 5, 5,
            5, 5, 7, 9, 9, 7, 5, 5,
            5, 5, 7, 7, 7, 7, 5, 5,
            5, 5, 5, 5, 5, 5, 5, 5,
            6, 5, 5, 5, 5, 5, 5, 6,
        };
        // zig fmt: on
        try std.testing.expectEqualSlices(BoardType, &expected, &bishop);
    }
    { // rook
        const rook = genRelevantOccupancy(.rook);
        // zig fmt: off
        const expected = [64]BoardType{
            12, 11, 11, 11, 11, 11, 11, 12,
            11, 10, 10, 10, 10, 10, 10, 11,
            11, 10, 10, 10, 10, 10, 10, 11,
            11, 10, 10, 10, 10, 10, 10, 11,
            11, 10, 10, 10, 10, 10, 10, 11,
            11, 10, 10, 10, 10, 10, 10, 11,
            11, 10, 10, 10, 10, 10, 10, 11,
            12, 11, 11, 11, 11, 11, 11, 12,
        };
        // zig fmt: on
        try std.testing.expectEqualSlices(BoardType, &expected, &rook);
    }