12345678910111213141516171819202122232425262728293031323334353637383940414243444546
define(['./isFunction', './_isMasked', './isObject', './_toSource'], function(isFunction, isMasked, isObject, toSource) {
  /**   * Used to match `RegExp`   * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).   */  var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
  /** Used to detect host constructors (Safari). */  var reIsHostCtor = /^\[object .+?Constructor\]$/;
  /** Used for built-in method references. */  var funcProto = Function.prototype,      objectProto = Object.prototype;
  /** Used to resolve the decompiled source of functions. */  var funcToString = funcProto.toString;
  /** Used to check objects for own properties. */  var hasOwnProperty = objectProto.hasOwnProperty;
  /** Used to detect if a method is native. */  var reIsNative = RegExp('^' +    funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')    .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'  );
  /**   * The base implementation of `_.isNative` without bad shim checks.   *   * @private   * @param {*} value The value to check.   * @returns {boolean} Returns `true` if `value` is a native function,   *  else `false`.   */  function baseIsNative(value) {    if (!isObject(value) || isMasked(value)) {      return false;    }    var pattern = isFunction(value) ? reIsNative : reIsHostCtor;    return pattern.test(toSource(value));  }
  return baseIsNative;});