import { ASTNode } from '../types';
/**
 * AST cache for storing parsed ASTs
 * Reduces redundant parsing of unchanged files
 */
export declare class ASTCache {
    private cache;
    private ttl;
    private maxSize;
    private stats;
    constructor(ttl?: number, maxSize?: number);
    /**
     * Get cached AST for a file
     */
    get(filePath: string, contentHash: string): ASTNode | null;
    /**
     * Set cached AST for a file
     */
    set(filePath: string, contentHash: string, ast: ASTNode): void;
    /**
     * Invalidate cache for a file
     */
    invalidate(filePath: string): void;
    /**
     * Clear all cache entries
     */
    clear(): void;
    /**
     * Get cache statistics
     */
    getStats(): {
        hitRate: number;
        size: number;
        maxSize: number;
        hits: number;
        misses: number;
        evictions: number;
    };
    /**
     * Evict oldest entry
     */
    private evictOldest;
    /**
     * Generate content hash for a file
     */
    static generateContentHash(content: string): string;
    /**
     * Generate file hash based on file stats
     */
    static generateFileHash(filePath: string, rootDir: string): string;
}
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