From 93db417105d45d3841ace5a932429d5e57005e2e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C3=ABl=20Zasso?= <targos@protonmail.com>
Date: Tue, 7 Feb 2017 10:41:49 +0100
Subject: [PATCH 1/2] tools: enable ES2017 syntax support in ESLint

This allows us to use async functions.
---
 .eslintrc.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.eslintrc.yaml b/.eslintrc.yaml
index 4f691caefd3a78..b48cccee5ac123 100644
--- a/.eslintrc.yaml
+++ b/.eslintrc.yaml
@@ -3,7 +3,7 @@ env:
   es6: true
 
 parserOptions:
-  ecmaVersion: 2016
+  ecmaVersion: 2017
 
 rules:
   # Possible Errors

From c2fac57b6bc43d2f561b91f7a02ccb2af690bd94 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C3=ABl=20Zasso?= <targos@protonmail.com>
Date: Tue, 7 Feb 2017 10:46:12 +0100
Subject: [PATCH 2/2] util: improve inspect for (Async|Generator)Function

Use the constructor name in the output, if present.
---
 lib/util.js                        | 13 ++++++++-----
 test/parallel/test-util-inspect.js |  6 ++++++
 2 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/lib/util.js b/lib/util.js
index 46cde4d85bf28b..003b5e5b54073b 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -400,11 +400,14 @@ function formatValue(ctx, value, recurseTimes) {
     });
   }
 
+  var constructor = getConstructorOf(value);
+
   // Some type of object without properties can be shortcutted.
   if (keys.length === 0) {
     if (typeof value === 'function') {
-      return ctx.stylize(`[Function${value.name ? `: ${value.name}` : ''}]`,
-                         'special');
+      const ctorName = constructor ? constructor.name : 'Function';
+      return ctx.stylize(
+          `[${ctorName}${value.name ? `: ${value.name}` : ''}]`, 'special');
     }
     if (isRegExp(value)) {
       return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
@@ -440,12 +443,11 @@ function formatValue(ctx, value, recurseTimes) {
     // Can't do the same for DataView because it has a non-primitive
     // .buffer property that we need to recurse for.
     if (binding.isArrayBuffer(value) || binding.isSharedArrayBuffer(value)) {
-      return `${getConstructorOf(value).name}` +
+      return `${constructor.name}` +
              ` { byteLength: ${formatNumber(ctx, value.byteLength)} }`;
     }
   }
 
-  var constructor = getConstructorOf(value);
   var base = '', empty = false, braces;
   var formatter = formatObject;
 
@@ -536,7 +538,8 @@ function formatValue(ctx, value, recurseTimes) {
 
   // Make functions say that they are functions
   if (typeof value === 'function') {
-    base = ` [Function${value.name ? `: ${value.name}` : ''}]`;
+    const ctorName = constructor ? constructor.name : 'Function';
+    base = ` [${ctorName}${value.name ? `: ${value.name}` : ''}]`;
   }
 
   // Make RegExps say that they are RegExps
diff --git a/test/parallel/test-util-inspect.js b/test/parallel/test-util-inspect.js
index d1fa12902e4076..53f7e3014b389e 100644
--- a/test/parallel/test-util-inspect.js
+++ b/test/parallel/test-util-inspect.js
@@ -9,6 +9,8 @@ assert.strictEqual(util.inspect(false), 'false');
 assert.strictEqual(util.inspect(''), "''");
 assert.strictEqual(util.inspect('hello'), "'hello'");
 assert.strictEqual(util.inspect(function() {}), '[Function]');
+assert.strictEqual(util.inspect(async function() {}), '[AsyncFunction]');
+assert.strictEqual(util.inspect(function*() {}), '[GeneratorFunction]');
 assert.strictEqual(util.inspect(undefined), 'undefined');
 assert.strictEqual(util.inspect(null), 'null');
 assert.strictEqual(util.inspect(/foo(bar\n)?/gi), '/foo(bar\\n)?/gi');
@@ -28,6 +30,10 @@ assert.strictEqual(util.inspect([1, [2, 3]]), '[ 1, [ 2, 3 ] ]');
 assert.strictEqual(util.inspect({}), '{}');
 assert.strictEqual(util.inspect({a: 1}), '{ a: 1 }');
 assert.strictEqual(util.inspect({a: function() {}}), '{ a: [Function: a] }');
+assert.strictEqual(util.inspect({a: async function() {}}),
+                   '{ a: [AsyncFunction: a] }');
+assert.strictEqual(util.inspect({a: function*() {}}),
+                   '{ a: [GeneratorFunction: a] }');
 assert.strictEqual(util.inspect({a: 1, b: 2}), '{ a: 1, b: 2 }');
 assert.strictEqual(util.inspect({'a': {}}), '{ a: {} }');
 assert.strictEqual(util.inspect({'a': {'b': 2}}), '{ a: { b: 2 } }');