Tolan/frontend/node_modules/@rc-component/async-validator/es/validator/pattern.js

import rules from "../rule";
import { isEmptyValue } from "../util";
var pattern = function pattern(rule, value, callback, source, options) {
  var errors = [];
  var validate = rule.required || !rule.required && source.hasOwnProperty(rule.field);
  if (validate) {
    if (isEmptyValue(value, 'string') && !rule.required) {
      return callback();
    }
    rules.required(rule, value, source, errors, options);
    if (!isEmptyValue(value, 'string')) {
      rules.pattern(rule, value, source, errors, options);
    }
  }
  callback(errors);
};
export default pattern;