@ray-js/library/lib/regexp/NamedRegexp.js

Ray library for browser

import "core-js/modules/es.regexp.exec.js";
import "core-js/modules/esnext.iterator.constructor.js";
import "core-js/modules/esnext.iterator.reduce.js";
/**
 * 实现 Named Groups RegExp 的正则百表达式
 * ECMA 2018 的实现
 * 通过 new RegExp 运算符，无法被 babel 转义
 */
export default class NamedRegexp {
  /**
   * 创建 Named RegExp
   * @param {object} options
   * @param {RegExp} options.regex 正则
   * @param {Array<String>} options.groups 分组
   */

  constructor(options) {
    const {
      regex,
      groups
    } = options;
    this.regex = regex;
    this.groups = groups;
  }
  exec(value) {
    const matches = this.regex.exec(value);
    if (!matches) return matches;
    const groups = matches.reduce((result, match, index) => {
      if (index > 0)
        // This subtraction is required because we count
        // match indexes from 1, because 0 is the entire matched string
        result[this.groups[index - 1]] = match;
      return result;
    }, {});
    matches.groups = groups;
    return matches;
  }
}