import { Ast } from './parser.js';
import { EvalContext } from './context.js';
import { FValue } from './value.js';
/**
 * The cell's offset from the rule origin, added to UNANCHORED reference axes.
 * `curRow`/`curCol` carry the ABSOLUTE current cell (origin + delta) so `ROW()`/
 * `COLUMN()` with no argument can report it; absent ({@link NO_SHIFT}) ⇒ those
 * no-arg forms have no cell to name and yield `#VALUE!`.
 */
export interface Shift {
    /** Row delta from the rule origin, added to an unanchored row axis. */
    readonly dRow: number;
    /** Column delta from the rule origin, added to an unanchored column axis. */
    readonly dCol: number;
    /** The absolute current row, for no-arg `ROW()`; absent ⇒ `#VALUE!`. */
    readonly curRow?: number;
    /** The absolute current column, for no-arg `COLUMN()`; absent ⇒ `#VALUE!`. */
    readonly curCol?: number;
}
/** The zero shift — no offset and no current cell (no-arg `ROW`/`COLUMN` → `#VALUE!`). */
export declare const NO_SHIFT: Shift;
/**
 * Evaluate an {@link Ast} against an `EvalContext` and a per-cell {@link Shift},
 * yielding an `FValue` (a scalar, a reference, or an array). Cells/ranges
 * evaluate to reference values; scalar operators dereference them.
 *
 * @param ast   The syntax tree to evaluate.
 * @param ctx   The evaluation context (grid access, defined names, date system).
 * @param shift The current cell's offset from the rule origin.
 * @returns The computed value.
 */
export declare function evaluate(ast: Ast, ctx: EvalContext, shift: Shift): FValue;