/**
 * DependencyTracker - Extract and track field dependencies
 *
 * Analyzes expressions to find field references and build dependency graphs
 * Detects circular dependencies and calculates evaluation order
 *
 * @spec Expression_Engine.md
 */
export declare class DependencyTracker {
    private escapedBracePattern;
    /**
     * Extract field names referenced in expression
     */
    extractFieldReferences(expression: string): string[];
    /**
     * Build dependency graph from multiple expressions
     */
    buildGraph(expressions: Record<string, string>): Record<string, string[]>;
    /**
     * Detect circular dependencies using DFS
     */
    detectCircularDependencies(graph: Record<string, string[]>): string[][];
    /**
     * Get topological sort order for evaluation
     */
    getTopologicalOrder(graph: Record<string, string[]>): string[];
    private isFunctionCall;
    private isOperator;
    private isKeyword;
}