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Board::what_if use Result

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This commit is contained in:
Simon Gardling 2025-02-19 13:43:39 -05:00
parent 6f51c31752
commit d7a94c2d57
Signed by: titaniumtown
GPG Key ID: 9AB28AC10ECE533D
1 changed files with 3 additions and 3 deletions
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src/board.rs
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@ -234,14 +234,14 @@ impl Board {
/// Return a modified [`Board`] with the piece placed at a position /// Return a modified [`Board`] with the piece placed at a position
/// Returns None if the move was invalid /// Returns None if the move was invalid
pub fn what_if(&self, i: usize, j: usize, piece: Piece) -> Option<Self> { pub fn what_if(&self, i: usize, j: usize, piece: Piece) -> Result<Self, &'static str> {
// extract check here to avoid copy // extract check here to avoid copy
if self.get(i, j).is_some() { if self.get(i, j).is_some() {
return None; return Err("position is occupied");
} }
let mut self_copy = *self; let mut self_copy = *self;
self_copy.place(i, j, piece).ok().map(|_| self_copy) self_copy.place(i, j, piece).map(|_| self_copy)
} }
/// Returns a bool which represents whether or not a move would propegate and be valid /// Returns a bool which represents whether or not a move would propegate and be valid