/**
 * Public cell value types for M1.1 worksheet cells.
 *
 * Citations: `ST_CellType` in transitional sml.xsd; docs/specs/worksheet-cells.md.
 */
/**
 * The error codes a cell can contain, such as `#DIV/0!` or `#N/A`.
 * Not part of the shipped package surface (`stripInternal`); public
 * {@link CellError.code} remains a plain `string`.
 *
 * @private
 */
export declare type CellErrorCode = '#NULL!' | '#DIV/0!' | '#VALUE!' | '#REF!' | '#NAME?' | '#NUM!' | '#N/A' | '#GETTING_DATA' | '#SPILL!' | '#CALC!' | '#FIELD!' | '#CONNECT!' | '#BLOCKED!' | '#UNKNOWN!' | '#FIELD' | '#CALC' | '#SPILL' | '#UNKNOWN' | '#BLOCKED' | '#CONNECT' | '#GETTING_DATA!';
/**
 * Represents an error value stored in a cell, such as `#DIV/0!` or `#N/A`,
 * letting you detect and inspect formula errors in worksheet data.
 */
export interface CellError {
    /** Always `'error'`; marks the cell value as an error. */
    readonly type: 'error';
    /** The error code, such as `#DIV/0!` or `#N/A`. */
    readonly code: string;
}
/**
 * The possible contents of a cell: nothing, a number, text, a boolean, or
 * an error value.
 */
export declare type CellValue = null | number | string | boolean | CellError;
/**
 * The set of error codes the library accepts when writing an error value to
 * a cell.
 */
export declare const KNOWN_CELL_ERROR_CODES: ReadonlySet<string>;
/**
 * Checks whether a value is a {@link CellError} object, letting you
 * distinguish error cells from other cell contents.
 */
export declare function isCellError(value: unknown): value is CellError;