import type { CallStack } from '../../../../shell/call_stack.ts';
import type { Session } from '../../../session/session.ts';
import type { BuiltinCall, Result } from '../types.ts';
export declare function loopLevels(args: readonly string[]): number;
/** `true`: succeed and print nothing. */
export declare function handleTrue(): Result;
/** `:`: succeed and print nothing (the null command). */
export declare function handleColon(): Result;
/** `false`: fail with 1 and print nothing. */
export declare function handleFalse(): Result;
/** Return from a function or sourced script, with bash's checks. */
export declare function handleReturn(args: readonly string[], session: Session, callStack?: CallStack | null): Result;
/** Exit the shell, with bash's argument checks. */
export declare function handleExit(args: readonly string[], session: Session): Result;
/** The `true` arm. */
export declare function trueBuiltin(_call: BuiltinCall): Promise<Result>;
/** The `:` arm. */
export declare function colonBuiltin(_call: BuiltinCall): Promise<Result>;
/** The `false` arm. */
export declare function falseBuiltin(_call: BuiltinCall): Promise<Result>;
/** The `return` arm. */
export declare function returnBuiltin(call: BuiltinCall): Promise<Result>;
/** The `exit` arm. */
export declare function exitBuiltin(call: BuiltinCall): Promise<Result>;
/** The `break` arm: unwinds the enclosing loops by throwing. */
export declare function breakBuiltin(call: BuiltinCall): Promise<Result>;
/** The `continue` arm: unwinds to the next iteration by throwing. */
export declare function continueBuiltin(call: BuiltinCall): Promise<Result>;
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