/**
 * PostgreSQL ENUM type builder
 */
export interface EnumTypeDefinition {
    name: string;
    values: string[];
}
/**
 * Registry to store all enum types defined in the schema
 */
export declare class EnumTypeRegistry {
    private static enums;
    static register(name: string, values: string[]): void;
    static get(name: string): EnumTypeDefinition | undefined;
    static getAll(): Map<string, EnumTypeDefinition>;
    static clear(): void;
    static has(name: string): boolean;
}
/**
 * Create a PostgreSQL ENUM type
 *
 * @example
 * const statusEnum = pgEnum('order_status', ['pending', 'processing', 'completed', 'cancelled']);
 * entity.property(e => e.status).hasType(enumColumn('status', statusEnum));
 */
export declare function pgEnum<T extends readonly string[]>(name: string, values: T): EnumTypeDefinition;
/**
 * Type helper to extract enum values as a union type
 */
export type EnumValues<T extends EnumTypeDefinition> = T['values'][number];
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