util: move getConstructorOf() to internal

PR-URL: #12526 Reviewed-By: James M Snell <[email protected]>

Author: TimothyGu

lib/internal/util.js

@@ -180,6 +180,21 @@ function convertToValidSignal(signal){
 thrownewError('Unknown signal: '+signal);
 }
 
+functiongetConstructorOf(obj){
+while(obj){
+vardescriptor=Object.getOwnPropertyDescriptor(obj,'constructor');
+if(descriptor!==undefined&&
+typeofdescriptor.value==='function'&&
+descriptor.value.name!==''){
+returndescriptor.value;
+}
+
+obj=Object.getPrototypeOf(obj);
+}
+
+returnnull;
+}
+
 module.exports=exports={
  assertCrypto,
  cachedResult,
@@ -188,6 +203,7 @@ module.exports = exports ={
  decorateErrorStack,
  deprecate,
  filterDuplicateStrings,
+ getConstructorOf,
  isError,
  normalizeEncoding,
  objectToString,

lib/util.js

@@ -278,22 +278,6 @@ function arrayToHash(array){
 }
 
 
-functiongetConstructorOf(obj){
-while(obj){
-vardescriptor=Object.getOwnPropertyDescriptor(obj,'constructor');
-if(descriptor!==undefined&&
-typeofdescriptor.value==='function'&&
-descriptor.value.name!==''){
-returndescriptor.value;
-}
-
-obj=Object.getPrototypeOf(obj);
-}
-
-returnnull;
-}
-
-
 functionensureDebugIsInitialized(){
 if(Debug===undefined){
 construnInDebugContext=require('vm').runInDebugContext;
@@ -410,7 +394,7 @@ function formatValue(ctx, value, recurseTimes){
 });
 }
 
-varconstructor=getConstructorOf(value);
+varconstructor=internalUtil.getConstructorOf(value);
 
 // Some type of object without properties can be shortcutted.
 if(keys.length===0){