moltres-utils/dist/lang/isGeneratorFunction.js

Utils for Moltres apps

"use strict";

require("core-js/modules/es6.object.define-property");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

require("regenerator-runtime/runtime");

require("core-js/modules/es7.symbol.async-iterator");

require("core-js/modules/es6.symbol");

var _functionToString = _interopRequireDefault(require("./functionToString"));

var _objectToString = _interopRequireDefault(require("./objectToString"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

var isFnRegex = /^\s*(?:function)?\*/;
var hasToStringTag = typeof Symbol === 'function' && _typeof(Symbol.toStringTag) === 'symbol';
var getProto = Object.getPrototypeOf;

var getGeneratorFunc = function getGeneratorFunc() {
  // eslint-disable-line consistent-return
  if (!hasToStringTag) {
    return false;
  }

  return (
    /*#__PURE__*/
    regeneratorRuntime.mark(function _callee() {
      return regeneratorRuntime.wrap(function _callee$(_context) {
        while (1) {
          switch (_context.prev = _context.next) {
            case 0:
            case "end":
              return _context.stop();
          }
        }
      }, _callee, this);
    })
  );
};

var generatorFunc = getGeneratorFunc();
var GeneratorFunction = generatorFunc ? getProto(generatorFunc) : {};
/**
 * Checks whether a function is generator function.
 *
 * @function
 * @since v0.0.3
 * @category lang
 * @param  {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a generator function, else `false`.
 * @example
 *
 * isGeneratorFunction(function*() {})  //=> true
 * isGeneratorFunction(function() {})   //=> false
 */

var isGeneratorFunction = function isGeneratorFunction(value) {
  if (typeof value !== 'function') {
    return false;
  }

  if (isFnRegex.test((0, _functionToString.default)(value))) {
    return true;
  }

  if (!hasToStringTag) {
    var str = (0, _objectToString.default)(value);
    return str === '[object GeneratorFunction]';
  }

  return getProto(value) === GeneratorFunction;
};

var _default = isGeneratorFunction;
exports.default = _default;
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