import type { Session } from '../../../session/session.ts';
import type { SessionView } from '../../../../ops/types.ts';
import type { BuiltinCall, Result } from '../types.ts';
/**
 * Unset shell variables, arrays, or functions, with bash's flags.
 *
 * `-v` targets a variable only, `-f` a function only, and a bare name a
 * variable if one exists or else a function. A `name[idx]` operand clears
 * one element; the readonly guard resolves it to the base name first,
 * since that is what `readonly` records. `-n` (unset a nameref itself)
 * has no referent here — mirage has no nameref attribute — so it matches
 * bash on a non-nameref name and leaves it untouched.
 */
export declare function handleUnset(args: string[], session: Session, state?: SessionView | null): Promise<Result>;
/** The `unset` arm. */
export declare function unsetBuiltin(call: BuiltinCall): Promise<Result>;
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