Add naive rook move generation

This commit is contained in:
Bruno BELANYI 2022-07-22 10:33:45 +02:00
parent 8ff47231a0
commit bf23d0eaae
2 changed files with 56 additions and 0 deletions

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@ -2,3 +2,4 @@
mod bishop; mod bishop;
mod king; mod king;
mod knight; mod knight;
mod rook;

55
src/movegen/rook.rs Normal file
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use crate::board::{Bitboard, Direction, Square};
/// Compute a rook's movement given a set of blockers that cannot be moved past.
#[allow(unused)]
pub fn rook_moves(square: Square, blockers: Bitboard) -> Bitboard {
Direction::iter_rook()
.map(|dir| dir.slide_board_with_blockers(square.into_bitboard(), blockers))
.fold(Bitboard::EMPTY, |lhs, rhs| lhs | rhs)
}
#[cfg(test)]
mod test {
use super::*;
use crate::board::{File, Rank};
#[test]
fn moves_lower_left_square() {
assert_eq!(
rook_moves(Square::A1, Bitboard::EMPTY),
(File::A.into_bitboard() | Rank::First.into_bitboard()) - Square::A1
);
assert_eq!(
rook_moves(Square::A1, Bitboard::ALL),
Square::A2 | Square::B1
);
assert_eq!(
rook_moves(Square::A1, Rank::First.into_bitboard()),
(File::A.into_bitboard() | Square::B1) - Square::A1
);
assert_eq!(
rook_moves(Square::A1, File::A.into_bitboard()),
(Rank::First.into_bitboard() | Square::A2) - Square::A1
);
}
#[test]
fn moves_middle() {
assert_eq!(
rook_moves(Square::D4, Bitboard::EMPTY),
(File::D.into_bitboard() | Rank::Fourth.into_bitboard()) - Square::D4
);
assert_eq!(
rook_moves(Square::D4, Bitboard::ALL),
Square::C4 | Square::D3 | Square::D5 | Square::E4
);
assert_eq!(
rook_moves(Square::D4, Rank::Fourth.into_bitboard()),
(File::D.into_bitboard() | Square::C4 | Square::E4) - Square::D4
);
assert_eq!(
rook_moves(Square::D4, File::D.into_bitboard()),
(Rank::Fourth.into_bitboard() | Square::D3 | Square::D5) - Square::D4
);
}
}