import { IAst, ILine, INodeLength, INodeLine, IToken } from "./interfaces";
/**
 * The parser takes an array of tokens and compute into an AST.
 *
 * ```
 * const tokens = [
 *      { type: "num", value: "35" },
 *      { type: "char", value: "a" }
 * ];
 * const ast = parser(tokens);
 *      {
 *          type: "SwiftPattern",
 *          body: [
 *              {
 *                  type: "line",
 *                  nodes: [
 *                      {
 *                          type: "field",
 *                          length: { min: 0, max: 35 },
 *                          char: "a"
 *                      },
 *                  ]
 *              }
 *          ]
 *      }
 * ```
 *
 * @param tokens the SWIFT field pattern string
 * @returns the tokens array
 */
export declare const parser: (tokens: IToken[]) => IAst;
/**
 * The parse function takes an array of tokens and compute them into an
 * array of nodes.
 *
 * ```
 * const tokens = [
 *     { type: ETokenType.num, value: "35" },
 *     { type: ETokenType.char, value: "a" },
 *     { type: ETokenType.bracket, value: "[" },
 *     { type: ETokenType.num, value: "3" },
 *     { type: ETokenType.quant, value: "-" },
 *     { type: ETokenType.num, value: "20" },
 *     { type: ETokenType.char, value: "c" },
 *     { type: ETokenType.bracket, value: "]" },
 * ];
 * const ast = parser(tokens);
 *  {
 *      type: "line",
 *      nodes: [
 *          {
 *              type: "field",
 *              length: { min: 0, max: 35 },
 *              char: "a",
 *          },
 *          {
 *              type: "optionalField",
 *              nodes: [
 *                  {
 *                      type: "field",
 *                      length: { min: 3, max: 20 },
 *                      char: "c",
 *                  },
 *              ],
 *          },
 *      ],
 *  },
 * ```
 *
 * @param tokens
 */
export declare const parse: (tokens: IToken[], optional?: boolean | undefined) => INodeLine;
/**
 * The splitLines function takes an array of tokens and compute into an
 * array of lines with the corresponding tokens.
 *
 * ```
 * const tokens = [
 *     { type: ETokenType.num, value: "35" },
 *     { type: ETokenType.char, value: "a" },
 *     { type: ETokenType.bracket, value: "[" },
 *     { type: ETokenType.num, value: "3" },
 *     { type: ETokenType.quant, value: "-" },
 *     { type: ETokenType.num, value: "20" },
 *     { type: ETokenType.char, value: "c" },
 *     { type: ETokenType.bracket, value: "]" },
 *     { type: ETokenType.num, value: "2" },
 *     { type: ETokenType.multilineQuant, value: "*" },
 *     { type: ETokenType.num, value: "35" },
 *     { type: ETokenType.char, value: "a" },
 * ];
 * const ast = parser(tokens);
 *      [
 *          {
 *              type: "line",
 *              tokens: [
 *                  { type: "num", value: "35" },
 *                  { type: "char", value: "a" },
 *                  { type: "bracket", value: "[" },
 *                  { type: "num", value: "3" },
 *                  { type: "quant", value: "-" },
 *                  { type: "num", value: "20" },
 *                  { type: "char", value: "c" },
 *                  { type: "bracket", value: "]" },
 *              ]
 *          },
 *          {
 *              type: "line",
 *              tokens: [
 *                  { type: "num", value: "35" },
 *                  { type: "char", value: "a" },
 *              ]
 *          },
 *          {
 *              type: "line",
 *              tokens: [
 *                  { type: "num", value: "35" },
 *                  { type: "char", value: "a" },
 *              ]
 *          }
 *      ]
 * ```
 *
 * @param tokens
 */
export declare const splitLines: (tokens: IToken[]) => ILine[];
/**
 * Returns the token when it is defined or an undefined token.
 * @param token
 */
export declare const getToken: (token?: IToken | undefined) => IToken;
/**
 * Returns an length object based on the provided quantifier.
 * @param num1
 * @param quant
 */
export declare const getLengthObj: (num1: string, quant?: string | undefined, num2?: string | undefined) => INodeLength;