/**
 * Rill Language Constants
 * Single source of truth for shared constant values used across parser and runtime.
 */
/**
 * All valid Rill type names accepted in type annotations, assertions,
 * shape field definitions, closure parameter types, and capture resolvers.
 *
 * Used by both:
 * - Parser: array iteration for token validation
 * - Runtime: Set-based O(1) membership lookup
 */
export declare const VALID_TYPE_NAMES: readonly ['string', 'number', 'bool', 'closure', 'list', 'dict', 'tuple', 'ordered', 'vector', 'any', 'type', 'iterator', 'stream', 'datetime', 'duration', 'atom'];