/**
 * A {@link Validation.ConstraintTrait | ConstraintTrait} indicating that
 * a {@link Validation.Constraint | Constraint<T>} function provides an
 * additional constraint implementation.
 * @public
 */
export interface FunctionConstraintTrait {
    type: 'function';
}
/**
 * Union of all supported constraint traits.
 * @public
 */
export type ConstraintTrait = FunctionConstraintTrait;
/**
 * Interface describing the supported validator traits.
 * @public
 */
export interface ValidatorTraitValues {
    /**
     * Indicates whether the validator accepts `undefined` as
     * a valid value.
     */
    readonly isOptional: boolean;
    /**
     * If present, indicates that the result will be branded
     * with the corresponding brand.
     */
    readonly brand?: string;
    /**
     * Zero or more additional {@link Validation.ConstraintTrait | ConstraintTrait}s
     * describing additional constraints applied by this {@link Validation.Validator | Validator}.
     */
    readonly constraints: ConstraintTrait[];
}
/**
 * Default {@link Validation.ValidatorTraitValues | validation traits}.
 * @public
 */
export declare const defaultValidatorTraits: ValidatorTraitValues;
/**
 * Generic implementation of {@link Validation.ValidatorTraitValues | ValidatorTraitValues}.
 * @public
 */
export declare class ValidatorTraits implements ValidatorTraitValues {
    /**
     * {@inheritdoc Validation.ValidatorTraitValues.isOptional}
     */
    readonly isOptional: boolean;
    /**
     * {@inheritdoc Validation.ValidatorTraitValues.brand}
     */
    readonly brand?: string;
    /**
     * {@inheritdoc Validation.ValidatorTraitValues.constraints}
     */
    readonly constraints: ConstraintTrait[];
    /**
     * Constructs a new {@link Validation.ValidatorTraits | ValidatorTraits} optionally
     * initialized with the supplied base and initial values.
     * @remarks
     * Initial values take priority over base values, which fall back to the global default values.
     * @param init - Partial initial values to be set in the resulting {@link Validation.Validator | Validator}.
     * @param base - Base values to be used when no initial values are present.
     */
    constructor(init?: Partial<ValidatorTraitValues>, base?: ValidatorTraitValues);
}
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