import { type ValidatedBox } from './ValidatedBox.js';
import { type ValidationResult } from './ValidationResult.js';
import { type Validator } from './Validator.js';
import { Variable } from './Variable.js';
/**
 * Similar to {@link Variable}, except the variable's value can optionally be
 * validated by a {@link Validator | validator function}.
 *
 * @typeParam V - The type of {@link Variable#value}.
 * @typeParam T - The transformed type of a {@link ValidatedVariable#validValue | valid value}.
 *
 * @category State Management
 */
export declare class ValidatedVariable<V, T = V> extends Variable<V> implements ValidatedBox<V, T> {
    /** See {@link ValidatedVariable#valid}. For internal use only */
    private _valid;
    /** See {@link ValidatedVariable#validValue}. For internal use only */
    private _validValue?;
    /**
     * The validator/transformer used for this variable's value. If null, then
     * the value will always be valid and {@link ValidatedVariable#validValue}
     * will be equal to {@link Variable#value}.
     */
    readonly validator: Validator<V, T> | null;
    constructor(initialValue: V, validator?: Validator<V, T> | null);
    get valid(): boolean;
    get validValue(): T;
    setValue(value: V, group?: unknown): boolean;
    validate(value: V): ValidationResult<T>;
    private validateAndSet;
}