/**
 * Never validation core module
 * Provides a validator that fails for every input, useful for marking
 * positions in a schema that must never be filled (for example, exhaustive
 * union members that should be unreachable at the type level).
 */
import { type StandardSchemaV1 } from "../../Validate/standardSchema";
/**
 * Return type produced by a `never` validator. Exposes the literal `"never"`
 * tag through the `type` field so `ValidateType<"never">` can map it back to
 * the `never` runtime type when consumed by downstream helpers.
 */
export interface NeverReturnType {
    validate: boolean;
    message: string;
    type: "never";
}
/**
 * Creates a validator that always fails
 * @param {string} [message] - Custom error message for validation failure
 * @returns {Function} - Validator that always returns a failing result
 */
export declare const never: (message?: string) => ((value: any) => NeverReturnType) & StandardSchemaV1<never, never>;