src/bitboard.rs

pub type Bitboard = u64;

pub const EMPTY: Bitboard = 0;
pub const FILE_A: Bitboard = 0x0101010101010101;
pub const FILE_H: Bitboard = 0x8080808080808080;

#[inline(always)]
pub fn pop_lsb(bb: &mut Bitboard) -> u8 {
    let lsb = bb.trailing_zeros() as u8;
    *bb &= *bb - 1;
    lsb
}

#[inline(always)]
pub fn get_bit(bb: Bitboard, sq: crate::types::Square) -> bool {
    (bb & (1 << (sq as u8))) != 0
}