import { HasTag, SomeSpec, Spec, SpecKind, SpecSuccess, SpecTag, SpectypesError } from './types.js';
/**
 * Creates a spec with custom constraint.
 *
 * @param spec Basis spec
 * @param constraint Function that performs additional validation
 */
export declare const limit: <Constraint extends (value: SpecSuccess<ItemSpec>) => boolean, ItemSpec extends Spec = SomeSpec>(spec: HasTag<ItemSpec, 'optional'> extends true ? SpectypesError<'optional', 'limit'> : HasTag<ItemSpec, 'filter'> extends true ? SpectypesError<'filter', 'limit'> : HasTag<ItemSpec, 'lazy'> extends true ? SpectypesError<'lazy', 'limit'> : ItemSpec, constraint: Constraint) => Spec<[
    'limit',
    ...SpecTag<ItemSpec>
], SpecKind<ItemSpec>, Constraint extends (value: any) => value is infer U ? U : SpecSuccess<ItemSpec>>;