export type DeclarationConstraintOptions<T> = {
    readonly constraints?: ExtrinsicConstraint<T>[];
};
export type Constraint<T> = IntrinsicConstraint<T> | ExtrinsicConstraint<T>;
export type IntrinsicConstraint<T> = {
    readonly constrain: Constrain<T>;
};
export type ExtrinsicConstraint<T> = {
    readonly description: string;
    readonly constrain: Constrain<T>;
};
export type Constrain<T> = (v: T) => string | undefined | void | true;
export declare function applyConstraints<T>(constraints: Constraint<T>[], value: T): void;
export declare function extrinsicConstraints<T>(constraints: Constraint<T>[]): ExtrinsicConstraint<T>[];
export declare class ConstraintsError extends Error {
    readonly errors: Error[];
    constructor(errors: Error[]);
}