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Add 'Bitboard::count'

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This commit is contained in:
Bruno BELANYI 2022-07-17 20:39:47 +02:00
parent 7a7e7f3665
commit 8261b0c06b
1 changed files with 13 additions and 0 deletions
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13
src/board/bitboard/mod.rs
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@ -37,6 +37,12 @@ impl Bitboard {
Bitboard(0b00000000_11111111_00000000_00000000_00000000_00000000_00000000_00000000),
Bitboard(0b11111111_00000000_00000000_00000000_00000000_00000000_00000000_00000000),
];
/// Count the number of pieces in the [Bitboard].
#[inline(always)]
pub fn count(self) -> u32 {
self.0.count_ones()
}
}
impl Default for Bitboard {
@ -170,6 +176,13 @@ mod test {
use super::*;
use crate::board::square::*;
#[test]
fn count() {
assert_eq!(Bitboard::EMPTY.count(), 0);
assert_eq!(Bitboard::FILES[0].count(), 8);
assert_eq!(Bitboard::ALL.count(), 64);
}
#[test]
fn iter() {
assert_eq!(Bitboard::EMPTY.into_iter().collect::<Vec<_>>(), Vec::new());