import * as parser from '@babel/parser';
import * as t from '@babel/types';
import { Rule } from '../rule';
import { CategoryType, CodeFinding, SeverityLevel } from '../../types';
/**
 * Rule to detect potential null dereferences
 */
export declare class NullDereferenceRule extends Rule {
    readonly id = "bugs-null-dereference";
    readonly name = "Null Dereference";
    readonly description = "Detects potential null or undefined dereferences";
    readonly category = CategoryType.Bugs;
    readonly defaultSeverity = SeverityLevel.Error;
    readonly requiresAST = true;
    /**
     * Apply the rule to the given code
     *
     * @param code - Source code
     * @param ast - Parsed AST
     * @param filePath - Path to the file
     * @returns Array of findings
     */
    apply(code: string, ast: parser.ParseResult<t.File>, filePath: string): CodeFinding[];
    /**
     * Check if a node is guarded by a null check
     *
     * @param path - AST path
     * @param varName - Variable name
     * @returns True if the node is guarded by a null check
     */
    private isNullCheckGuarded;
    /**
     * Check if a node is a null check for a variable
     *
     * @param node - AST node
     * @param varName - Variable name
     * @returns True if the node is a null check
     */
    private isNullCheck;
    /**
     * Check if a node is a negated check
     *
     * @param node - AST node
     * @returns True if the node is a negated check
     */
    private isNegatedCheck;
    /**
     * Generate a suggestion for fixing a null dereference
     *
     * @param code - Original code
     * @param varName - Variable name
     * @returns Suggested code
     */
    protected generateSuggestion(code: string, varName?: string): string;
    /**
     * Get the name of the function containing this code
     *
     * @param path - AST path
     * @returns Function name or undefined
     */
    protected getFunctionName(path: any): string | undefined;
}