export interface CallFrameInit {
    positional?: string[];
    locals?: Record<string, string>;
    functionName?: string;
    loopLevel?: number;
}
export declare class CallFrame {
    positional: string[];
    locals: Record<string, string>;
    functionName: string;
    loopLevel: number;
    constructor(init?: CallFrameInit);
}
export declare class CallStack {
    private readonly frames;
    get current(): CallFrame;
    push(positional?: string[], functionName?: string): void;
    pop(): CallFrame;
    get depth(): number;
    getPositional(index: number): string;
    getAllPositional(): string[];
    getPositionalCount(): number;
    shift(n?: number): void;
    setPositional(values: string[]): void;
    setLocal(name: string, value: string): void;
    getLocal(name: string): string | null;
}
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