Enum Error 

pub enum Error {
    InvalidGridSize(usize),
    DisconnectedPolyomino,
    MissingCell(Cell),
    MissingPolyomino(Polyomino),
    CageConflict(Polyomino),
    InfeasibleCage(Polyomino, u64),
    InvalidCageFill(Polyomino, Fill),
    EmptyFills,
    InvalidCellCageIndex(usize),
    InvalidCellValue(Cell, N),
    InvalidValue(N),
}

Errors returned by mathdoku operations.

Variants

InvalidGridSize(usize)

Invalid grid size.

DisconnectedPolyomino

The cells do not form a connected polyomino.

MissingCell(Cell)

The Cell is missing from the specified polyomino or grid.

MissingPolyomino(Polyomino)

The Polyomino contains cells not present in the puzzle grid.

CageConflict(Polyomino)

Two polyominoes share one or more cells.

InfeasibleCage(Polyomino, u64)

No valid value assignment exists for the cage (operator/target infeasible).

InvalidCageFill(Polyomino, Fill)

Invalid fill for a cage.

EmptyFills

No candidate fills for a cage (internal solver state).

InvalidCellCageIndex(usize)

The index for a Cell in a cage is out of bounds.

InvalidCellValue(Cell, N)

Value not permitted in this Cell.

InvalidValue(N)

A value passed to Fill::new is outside the valid range 1..=9.

Trait Implementations

impl Debug for Error

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for Error

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for Error

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.