/**
 * Type definitions for railroad-diagrams
 * Project: https://github.com/tabatkins/railroad-diagrams
 */

declare module 'railroad-diagrams' {
  export class Diagram {
    constructor(children: DiagramNode[]);
    toSVG(): SVGElement;
    toString(): string;
  }

  export class ComplexDiagram extends Diagram {}

  export class Sequence {
    constructor(children: DiagramNode[]);
  }

  export class Choice {
    constructor(defaultIndex: number, children: DiagramNode[]);
  }

  export class Optional {
    constructor(child: DiagramNode, skip?: 'skip');
  }

  export class OneOrMore {
    constructor(child: DiagramNode, repeat?: DiagramNode);
  }

  export class ZeroOrMore {
    constructor(child: DiagramNode, repeat?: DiagramNode, skip?: 'skip');
  }

  export class Terminal {
    constructor(text: string);
  }

  export class NonTerminal {
    constructor(text: string);
  }

  export class Comment {
    constructor(text: string);
  }

  export class Skip {}

  export type DiagramNode =
    | Sequence
    | Choice
    | Optional
    | OneOrMore
    | ZeroOrMore
    | Terminal
    | NonTerminal
    | Comment
    | Skip;
}