tools_auto_web/node_modules/@rc-component/async-validator/es/rule/pattern.js

import { format } from "../util";
var pattern = function pattern(rule, value, source, errors, options) {
  if (rule.pattern) {
    if (rule.pattern instanceof RegExp) {
      // if a RegExp instance is passed, reset `lastIndex` in case its `global`
      // flag is accidentally set to `true`, which in a validation scenario
      // is not necessary and the result might be misleading
      rule.pattern.lastIndex = 0;
      if (!rule.pattern.test(value)) {
        errors.push(format(options.messages.pattern.mismatch, rule.fullField, value, rule.pattern));
      }
    } else if (typeof rule.pattern === 'string') {
      var _pattern = new RegExp(rule.pattern);
      if (!_pattern.test(value)) {
        errors.push(format(options.messages.pattern.mismatch, rule.fullField, value, rule.pattern));
      }
    }
  }
};
export default pattern;