import { Context } from '../context';
/**
 * A handler may return a `boolean` (legacy interface), a `Promise`, or a generator
 * that `yield`s to await async values. The render driver resolves all three, so
 * operators written against the legacy `=> boolean` signature keep working.
 */
export type OperatorGenerator = Generator<unknown, boolean, any>;
export type OperatorResult = boolean | Promise<boolean> | OperatorGenerator;
export type UnaryOperatorHandler = (operand: any, ctx: Context) => OperatorResult;
export type BinaryOperatorHandler = (lhs: any, rhs: any, ctx: Context) => OperatorResult;
export type OperatorHandler = UnaryOperatorHandler | BinaryOperatorHandler;
export type Operators = Record<string, OperatorHandler>;
export declare const defaultOperators: Operators;
export declare function equals(lhs: any, rhs: any): Generator<unknown, boolean, any>;
export declare function arrayIncludes(arr: any[], item: any): Generator<unknown, boolean, any>;