import type { Core } from "../core/index.js";
import type { Env } from "../env/index.js";
import type { Value } from "../value/index.js";
export type Closure = ClosureSimple | ClosureNative;
export type ClosureSimple = {
    "@kind": "ClosureSimple";
    env: Env;
    name: string;
    body: Core;
};
export declare function ClosureSimple(env: Env, name: string, body: Core): Closure;
export type ClosureNative = {
    "@kind": "ClosureNative";
    name: string;
    native: (arg: Value) => Value;
};
export declare function ClosureNative(name: string, native: (arg: Value) => Value): ClosureNative;
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