basant307/AI_Governance_Project

1var isFunction = require('./isFunction'),2    isMasked = require('./_isMasked'),3    isObject = require('./isObject'),4    toSource = require('./_toSource');5 6/**7 * Used to match `RegExp`8 * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).9 */10var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;11 12/** Used to detect host constructors (Safari). */13var reIsHostCtor = /^\[object .+?Constructor\]$/;14 15/** Used for built-in method references. */16var funcProto = Function.prototype,17    objectProto = Object.prototype;18 19/** Used to resolve the decompiled source of functions. */20var funcToString = funcProto.toString;21 22/** Used to check objects for own properties. */23var hasOwnProperty = objectProto.hasOwnProperty;24 25/** Used to detect if a method is native. */26var reIsNative = RegExp('^' +27  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')28  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'29);30 31/**32 * The base implementation of `_.isNative` without bad shim checks.33 *34 * @private35 * @param {*} value The value to check.36 * @returns {boolean} Returns `true` if `value` is a native function,37 *  else `false`.38 */39function baseIsNative(value) {40  if (!isObject(value) || isMasked(value)) {41    return false;42  }43  var pattern = isFunction(value) ? reIsNative : reIsHostCtor;44  return pattern.test(toSource(value));45}46 47module.exports = baseIsNative;48