Move naive move generation into sub-module

src/movegen/mod.rs

@@ -2,12 +2,8 @@
 pub mod magic;
 pub use magic::*;
 
-// Move generation implementation details
-pub(crate) mod bishop;
-pub(crate) mod king;
-pub(crate) mod knight;
-pub(crate) mod pawn;
-pub(crate) mod rook;
+// Naive move generation
+pub mod naive;
 
 // Magic bitboard generation
 pub(crate) mod wizardry;

src/movegen/naive/king.rs

@@ -1,4 +1,4 @@
-use crate::board::{Bitboard, CastleRights, Color, Direction, File, Square};
+use crate::board::{Bitboard, Direction, Square};
 
 /// Compute a king's movement. No castling moves included
 #[allow(unused)]
@@ -10,22 +10,6 @@ pub fn king_moves(square: Square) -> Bitboard {
         .fold(Bitboard::EMPTY, |lhs, rhs| lhs | rhs)
 }
 
-/// Compute a king's castling moves, given its [Color] and [CastleRights].
-#[allow(unused)]
-pub fn king_castling_moves(color: Color, castle_rights: CastleRights) -> Bitboard {
-    let rank = color.first_rank();
-
-    let king_side_square = Square::new(File::G, rank);
-    let queen_side_square = Square::new(File::C, rank);
-
-    match castle_rights {
-        CastleRights::NoSide => Bitboard::EMPTY,
-        CastleRights::KingSide => king_side_square.into_bitboard(),
-        CastleRights::QueenSide => queen_side_square.into_bitboard(),
-        CastleRights::BothSides => king_side_square | queen_side_square,
-    }
-}
-
 #[cfg(test)]
 mod test {
     use super::*;
@@ -186,40 +170,4 @@ mod test {
                 | Square::F6
         );
     }
-
-    #[test]
-    fn castling_moves() {
-        assert_eq!(
-            king_castling_moves(Color::White, CastleRights::NoSide),
-            Bitboard::EMPTY
-        );
-        assert_eq!(
-            king_castling_moves(Color::Black, CastleRights::NoSide),
-            Bitboard::EMPTY
-        );
-        assert_eq!(
-            king_castling_moves(Color::White, CastleRights::KingSide),
-            Square::G1.into_bitboard()
-        );
-        assert_eq!(
-            king_castling_moves(Color::Black, CastleRights::KingSide),
-            Square::G8.into_bitboard()
-        );
-        assert_eq!(
-            king_castling_moves(Color::White, CastleRights::QueenSide),
-            Square::C1.into_bitboard()
-        );
-        assert_eq!(
-            king_castling_moves(Color::Black, CastleRights::QueenSide),
-            Square::C8.into_bitboard()
-        );
-        assert_eq!(
-            king_castling_moves(Color::White, CastleRights::BothSides),
-            Square::C1 | Square::G1
-        );
-        assert_eq!(
-            king_castling_moves(Color::Black, CastleRights::BothSides),
-            Square::C8 | Square::G8
-        );
-    }
 }

src/movegen/naive/mod.rs

@@ -0,0 +1,14 @@
+pub mod bishop;
+pub use bishop::*;
+
+pub mod king;
+pub use king::*;
+
+pub mod knight;
+pub use knight::*;
+
+pub mod pawn;
+pub use pawn::*;
+
+pub mod rook;
+pub use rook::*;

src/movegen/wizardry/generation.rs

@@ -1,6 +1,5 @@
 use crate::board::{Bitboard, Square};
-use crate::movegen::bishop::bishop_moves;
-use crate::movegen::rook::rook_moves;
+use crate::movegen::naive::{bishop_moves, rook_moves};
 use crate::movegen::Magic;
 
 use super::mask::{generate_bishop_mask, generate_rook_mask};

src/movegen/wizardry/mask.rs

@@ -1,6 +1,5 @@
 use crate::board::{Bitboard, File, Rank, Square};
-use crate::movegen::bishop::bishop_moves;
-use crate::movegen::rook::rook_moves;
+use crate::movegen::naive::{bishop::bishop_moves, rook::rook_moves};
 
 /// Compute the relevancy mask for a bishop on a given [Square].
 pub fn generate_bishop_mask(square: Square) -> Bitboard {