/**
 * @angular-modernizer/plugin-angular - Performance Violation Rule
 *
 * Detects Angular performance violations that can cause memory leaks and poor performance.
 *
 * Detection Patterns:
 * - Observable subscriptions without proper cleanup
 * - Missing ngOnDestroy lifecycle hook when subscriptions exist
 * - Components with too many subscriptions
 * - Subscriptions in constructors or field initializers
 *
 * This rule helps prevent memory leaks and improve Angular application performance.
 */
import type { AnalysisRule, AnalysisContext, AnalysisResult } from '@angular-modernizer/plugin-system';
/**
 * Performance Violation Rule - detects performance issues and memory leaks.
 */
export declare class PerformanceViolationRule implements AnalysisRule {
    readonly id = "angular:performance-violation";
    readonly name = "Performance Violation";
    readonly description = "Detects Angular performance violations that can cause memory leaks and poor performance";
    readonly severity = "error";
    readonly category = "angular-performance";
    readonly tags: string[];
    analyze(context: AnalysisContext): Promise<AnalysisResult[]>;
    private analyzeClass;
    private isAngularClass;
    private findSubscriptions;
    /**
     * Detects subscription patterns in a given text.
     * @param text - The text to analyze for subscription patterns.
     * @param allowTypeAnnotations - Whether to allow type annotations (for expressions).
     * @returns The subscription type if found, null otherwise.
     */
    private detectSubscriptionPattern;
    private detectSubscriptionInExpression;
    private detectSubscriptionInStatement;
    private hasNgOnDestroy;
}
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