import { Node } from './node';
import { Code } from './instructions';
/**
 * Stack frame.
 */
export declare class Frame {
    readonly node: Node;
    readonly parent?: Frame | undefined;
    currentIndex: number;
    stopResolution: boolean;
    private variables?;
    private macros?;
    constructor(node: Node, parent?: Frame | undefined);
    /**
     * Adds a variable to this frame.
     */
    setVar(name: string, node: Node): void;
    /**
     * Returns a variable's value, or a missing node.
     */
    getVar(name: string): Node;
    /**
     * Returns the map containing the local variables for this frame.
     */
    getVars(): Map<string, Node> | undefined;
    /**
     * Adds a macro to this frame.
     */
    setMacro(name: string, inst: Code): void;
    _getMacro(name: string): Code | null;
}