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[board] Implement a PositionBuilder; refactor piece bitboards into a PieceBitBoards struct

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This makes Position immutable, even if declared mut. I think this will also make
it easier to build positions going forward.

Moving to a PieceBitBoards struct also required a lot of places that return owned
BitBoards to return refs. This is basically fine except for adding a few more &
here and there.

This was a huge refactoring project. All the move generators and a bunch of
BitBoard stuff needed to be updated.
This commit is contained in:
Eryn Wells 2024-01-19 18:08:41 -08:00
parent 939fac80d7
commit 24cce95a88
17 changed files with 472 additions and 381 deletions
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6
board/src/bitboard/library.rs
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@ -165,13 +165,13 @@ impl MoveLibrary {
}
#[inline]
fn generate_ray(sq: BitBoard, shift: fn(BitBoard) -> BitBoard) -> BitBoard {
fn generate_ray(sq: BitBoard, shift: fn(&BitBoard) -> BitBoard) -> BitBoard {
let mut ray = BitBoard::empty();
let mut iter = shift(sq);
let mut iter = shift(&sq);
while !iter.is_empty() {
ray |= iter;
iter = shift(iter);
iter = shift(&iter);
}
ray