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[board, core, moves, position] Implement castling

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Implement a new method on Position that evaluates whether the active color can castle
on a given wing of the board. Then, implement making a castling move in the position.

Make a new Wing enum in the core crate to specify kingside or queenside. Replace the
Castle enum from the board crate with this one. This caused a lot of churn...

Along the way fix a bunch of tests.

Note: there's still no way to actually make a castling move in explorer.
This commit is contained in:
Eryn Wells 2025-05-19 16:50:30 -07:00
parent 6816e350eb
commit 0c1863acb9
18 changed files with 499 additions and 258 deletions
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11
board/src/board.rs
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@ -7,7 +7,7 @@ use crate::{
PieceSet,
};
use chessfriend_bitboard::BitBoard;
use chessfriend_core::{Color, Piece, Shape, Square};
use chessfriend_core::{Color, Piece, Shape, Square, Wing};
#[derive(Clone, Debug, Default, Eq, PartialEq)]
pub struct Board {
@ -82,10 +82,12 @@ impl Board {
}
impl Board {
/// A [`BitBoard`] of squares occupied by pieces of all colors.
pub fn occupancy(&self) -> BitBoard {
self.pieces.occpuancy()
}
/// A [`BitBoard`] of squares that are vacant.
pub fn vacancy(&self) -> BitBoard {
!self.occupancy()
}
@ -99,6 +101,13 @@ impl Board {
}
}
impl Board {
#[must_use]
pub fn castling_parameters(&self, wing: Wing) -> &'static castle::Parameters {
&castle::Parameters::BY_COLOR[self.active_color as usize][wing as usize]
}
}
impl Board {
pub fn display(&self) -> DiagramFormatter<'_> {
DiagramFormatter::new(self)