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// Ported and adapted from js-yaml-js-types v1.0.0:// https://github.com/nodeca/js-yaml-js-types/tree/ac537e7bbdd3c2cbbd9882ca3919c520c2dc022b// Copyright 2011-2015 by Vitaly Puzrin. All rights reserved. MIT license.// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import { Type } from "../type.ts";import type { Any } from "../_utils.ts";
const REGEXP = /^\/(?<regexp>[\s\S]+)\/(?<modifiers>[gismuy]*)$/;
export const regexp = new Type("tag:yaml.org,2002:js/regexp", {  kind: "scalar",  resolve(data: Any) {    if ((data === null) || (!data.length)) {      return false;    }
    const regexp = `${data}`;    if (regexp.charAt(0) === "/") {      // Ensure regex is properly terminated      if (!REGEXP.test(data)) {        return false;      }      // Check no duplicate modifiers      const modifiers = [...(regexp.match(REGEXP)?.groups?.modifiers ?? "")];      if (new Set(modifiers).size < modifiers.length) {        return false;      }    }
    return true;  },  construct(data: string) {    const { regexp = `${data}`, modifiers = "" } =      `${data}`.match(REGEXP)?.groups ?? {};    return new RegExp(regexp, modifiers);  },  predicate(object: unknown) {    return object instanceof RegExp;  },  represent(object: RegExp) {    return object.toString();  },});