import type { Reference } from './reference.js';
import type { Value } from './value.js';
export type CReturn = {
    type: 'return';
    value: Value;
};
export type CBreak = {
    type: 'break';
    label?: string;
    value?: Value;
};
export type CContinue = {
    type: 'continue';
    label?: string;
    value: null;
};
export type Control = CReturn | CBreak | CContinue;
export declare const RETURN: (v: CReturn["value"]) => CReturn;
export declare const BREAK: (label?: string, value?: CBreak["value"]) => CBreak;
export declare const CONTINUE: (label?: string) => CContinue;
/**
 * 値がbreakで、ラベルが一致する場合のみ、その中身を取り出します。
 */
export declare function unWrapLabeledBreak(v: Value | Control, label: string | undefined): Value | Control;
export declare function unWrapRet(v: Value | Control): Value;
export declare function assertValue(v: Value | Control): asserts v is Value;
export declare function isControl(v: Value | Control | Reference): v is Control;
//# sourceMappingURL=control.d.ts.map