import { Cell } from './Cell';
import { GridLocation, SudokuPossibleValue } from './ValueTypes';
/**
 * Base class for immutable groups of Cells.
 */
export declare class CellCollection {
    /**
     * Instantiates a new CellCollection object.
     * @param values A list of cells to initialise with. Cells will be deep copied.
     */
    constructor(values: Cell[]);
    /**
     * Holds the cell values.
     */
    readonly cells: Cell[];
    /**
     * Returns a copy of the Cell at the given location.
     * @param location The grid location to look for.
     * @throws Error if the location cannot be found in the cell collection
     *         @see CellCollection#hasLocation hasLocation
     * @returns A copy of the cell.
     */
    cellAtLocation(location: GridLocation): Cell;
    /**
     * Returns a new CellCollection that combines the contents of two CellCollections
     * replacing any of the existing items with those in the cells parameter if they
     * appear at the same grid location.
     * @param cells Cells to merge.
     * @returns A new CellCollection with the merged Cells.
     */
    mergedWith(cells: CellCollection): CellCollection;
    /**
     * Returns a value indicating whether the CellCollection contains a value for the specified location.
     * @param location The location to check.
     * @returns True if the CellCollection contains a value for the location. False if not.
     */
    hasLocation(location: GridLocation): boolean;
    /**
     * Returns a value indicating whether the CellCollection contains a Cell with the
     * specified value (i.e. all other potential values are discarded).
     * @param value The value to check.
     * @returns True if the CellCollection contains a value. False if not.
     */
    hasValue(value: SudokuPossibleValue): boolean;
    /**
     * returns a value indicating whether the Grid is ann empty Grid.
     * @returns True if the grid has no values set (i.e. every Cell has all potential values)
     */
    hasNoValues(): boolean;
}