export interface StringLike {
    length: number;
    charAt(i: number): string;
    charCodeAt(i: number): number;
    substring(start: number, end?: number): string;
    toString(): string;
}
export declare type Taint = [number, number];
export declare class Region implements StringLike {
    readonly str: string;
    readonly start: number;
    readonly end: number;
    length: number;
    constructor(str: string, start?: number, end?: number);
    charAt(i: number): string;
    charCodeAt(i: number): number;
    substring(start: number, end?: number): string;
    subRegion(start: number, end?: number): Region;
    toString(): string;
    taint(from: number, to: number): this | TaintedRegion;
    taintRelative(from: number, to: number): this | TaintedRegion;
    taintRegion(subRegion: Region): this | TaintedRegion;
    untaint(): Region[];
}
export declare class TaintedRegion extends Region {
    readonly str: string;
    readonly start: number;
    readonly end: number;
    readonly taints: Taint[];
    constructor(str: string, start?: number, end?: number, taints?: Taint[]);
    charAt(i: number): string;
    charCodeAt(i: number): number;
    substring(start: number, end?: number): string;
    subRegion(start: number, end?: number): Region;
    taint(from: number, to: number): TaintedRegion;
    taintRelative(from: number, to: number): TaintedRegion;
    taintRegion(subRegion: Region): TaintedRegion;
    untaint(): Region[];
    protected untaintedIndexes(start: number, end: number): number[][];
}