// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
// This module is browser compatible.

import { Schema } from "./../schema.ts";
import { regexp, undefinedType } from "./../_type/mod.ts";
import { def } from "./default.ts";

/***
 * Extends JS-YAML default schema with additional JavaScript types
 * It is not described in the YAML specification.
 * Functions are no longer supported for security reasons.
 *
 * @example
 * ```ts
 * import {
 *   EXTENDED_SCHEMA,
 *   parse,
 * } from "@std/yaml";
 *
 * const data = parse(
 *   `
 *   regexp:
 *     simple: !!js/regexp foobar
 *     modifiers: !!js/regexp /foobar/mi
 *   undefined: !!js/undefined ~
 * # Disabled, see: https://github.com/denoland/deno_std/pull/1275
 * #  function: !!js/function >
 * #    function foobar() {
 * #      return 'hello world!';
 * #    }
 * `,
 *   { schema: EXTENDED_SCHEMA },
 * );
 * ```
 */
export const extended: Schema = new Schema({
  explicit: [regexp, undefinedType],
  include: [def],
});