import { Expression, ModuleItem, StringLiteral, TemplateElement, TemplateLiteral } from "@swc/core";
import Visitor from "@swc/core/Visitor";
/**
 * Traverses an AST (or parts of it) to collect all StringLiterals and TemplateElements that contain
 * needle in their value.
 */
export declare class StringCollector extends Visitor {
    matchingStrings: (StringLiteral | TemplateElement)[];
    private readonly needle;
    constructor(needle: string);
    visitStringLiteral(n: StringLiteral): StringLiteral;
    visitTemplateLiteral(n: TemplateLiteral): Expression;
}
/**
 * Represents a string as bytes, so it can be sliced via
 * byte-positions.
 */
export declare class StringAsBytes {
    private string;
    private decoder;
    constructor(string: string);
    /**
     * Returns a slice of the string by providing byte indices.
     * @param from - Byte index to slice from
     * @param to - Optional byte index to slice to
     */
    slice(from: number, to?: number): string;
}
/**
 * Parses js code into a AST.
 * @param code
 */
export declare function parseCode(code: string): Promise<[number, ModuleItem[]]>;
/**
 * Returns an array of StringLiterals and TemplateElements from an AST that contain needle in their value.
 * @param needle
 * @param ast
 */
export declare function collectMatchingStrings(needle: string, ast: ModuleItem[]): (StringLiteral | TemplateElement)[];