/**
 * @file Utility functions for logical expression node.
 */
import { type AnyExpressionNode, type ExpressionVariableNode } from '../nodes/index.js';
/**
 * Variable table. Key is variable name, value is boolean.
 */
export type VariableTable = {
    [key: string]: boolean;
};
/**
 * Utility functions for logical expression node.
 */
export declare class LogicalExpressionUtils {
    /**
     * Get all variables in the expression.
     *
     * @param node Logical expression node
     * @returns List of variables in the expression (nodes)
     * @example
     * If the expression is `a && b || c`, the returned list will be
     * nodes for `a`, `b`, and `c`.
     */
    static getVariables(node: AnyExpressionNode): ExpressionVariableNode[];
    /**
     * Evaluate the parsed logical expression. You'll need to provide a
     * variable table.
     *
     * @param node Logical expression node
     * @param table Variable table (key: variable name, value: boolean)
     * @returns Evaluation result
     * @example
     * If the expression is `a && b`, and the variable table is
     * `{ a: true, b: false }`, the result will be `false`.
     *
     * Example code:
     * ```js
     * LogicalExpressionUtils.evaluate(
     *     LogicalExpressionParser.parse('a && b'),
     *     { a: true, b: false }
     * );
     * ```
     */
    static evaluate(node: AnyExpressionNode, table: VariableTable): boolean;
}