51 lines
2.1 KiB
Rust
51 lines
2.1 KiB
Rust
/// A singular type for all errors that could happen during [ChessBoard::is_valid].
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#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
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pub enum InvalidError {
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/// Too many pieces.
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TooManyPieces,
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/// Missing king.
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MissingKing,
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/// Pawns on the first/last rank.
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InvalidPawnPosition,
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/// Castling rights do not match up with the state of the board.
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InvalidCastlingRights,
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/// En-passant target square is not empty, behind an opponent's pawn, on the correct rank.
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InvalidEnPassant,
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/// The two kings are next to each other.
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NeighbouringKings,
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/// The opponent is currently in check.
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OpponentInCheck,
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/// The piece-specific boards are overlapping.
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OverlappingPieces,
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/// The color-specific boards are overlapping.
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OverlappingColors,
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/// The pre-computed combined occupancy boards does not match the other boards.
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ErroneousCombinedOccupancy,
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}
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impl std::fmt::Display for InvalidError {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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let error_msg = match self {
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Self::TooManyPieces => "Too many pieces.",
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Self::MissingKing => "Missing king.",
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Self::InvalidPawnPosition => "Pawns on the first/last rank.",
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Self::InvalidCastlingRights => {
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"Castling rights do not match up with the state of the board."
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}
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Self::InvalidEnPassant => {
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"En-passant target square is not empty, behind an opponent's pawn, on the correct rank."
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}
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Self::NeighbouringKings => "The two kings are next to each other.",
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Self::OpponentInCheck => "The opponent is currently in check.",
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Self::OverlappingPieces => "The piece-specific boards are overlapping.",
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Self::OverlappingColors => "The color-specific boards are overlapping.",
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Self::ErroneousCombinedOccupancy => {
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"The pre-computed combined occupancy boards does not match the other boards."
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}
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};
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write!(f, "{}", error_msg)
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}
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}
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impl std::error::Error for InvalidError {}
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