From 3073f58bce6cf5364902960aeb09ee98f2d46822 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hu=C3=A1ng=20J=C3=B9nli=C3=A0ng?= <jlhwung@gmail.com>
Date: Wed, 28 Jul 2021 16:07:02 -0400
Subject: [PATCH] breaking: remove Node#__clone in Babel 8

---
 packages/babel-parser/src/parser/node.js | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/packages/babel-parser/src/parser/node.js b/packages/babel-parser/src/parser/node.js
index 495996fa5824..df41ff3fec7d 100644
--- a/packages/babel-parser/src/parser/node.js
+++ b/packages/babel-parser/src/parser/node.js
@@ -26,9 +26,12 @@ class Node implements NodeBase {
   trailingComments: Array<Comment>;
   innerComments: Array<Comment>;
   extra: { [key: string]: any };
+}
+const NodePrototype = Node.prototype;
 
-  // todo(Babel 8): remove this method in Babel 8
-  __clone(): this {
+if (!process.env.BABEL_8_BREAKING) {
+  // $FlowIgnore
+  NodePrototype.__clone = function (): Node {
     // $FlowIgnore
     const newNode: any = new Node();
     const keys = Object.keys(this);
@@ -40,15 +43,13 @@ class Node implements NodeBase {
         key !== "trailingComments" &&
         key !== "innerComments"
       ) {
-        // $FlowIgnore
         newNode[key] = this[key];
       }
     }
 
     return newNode;
-  }
+  };
 }
-const NodePrototype = Node.prototype;
 
 function clonePlaceholder(node: any): any {
   return cloneIdentifier(node);