From 6029252bec3e9c091d7cf8ff0b10b4c92953ca5f Mon Sep 17 00:00:00 2001
From: overlookmotel <theoverlookmotel@gmail.com>
Date: Thu, 7 Oct 2021 22:34:12 +0100
Subject: [PATCH] Fix missing inner comments in function expressions (#13825)

---
 packages/babel-generator/src/generators/methods.ts         | 1 +
 .../test/fixtures/comments/function-inner-comment/input.js | 7 +++++++
 .../fixtures/comments/function-inner-comment/options.json  | 3 +++
 .../fixtures/comments/function-inner-comment/output.js     | 7 +++++++
 4 files changed, 18 insertions(+)
 create mode 100644 packages/babel-generator/test/fixtures/comments/function-inner-comment/input.js
 create mode 100644 packages/babel-generator/test/fixtures/comments/function-inner-comment/options.json
 create mode 100644 packages/babel-generator/test/fixtures/comments/function-inner-comment/output.js

diff --git a/packages/babel-generator/src/generators/methods.ts b/packages/babel-generator/src/generators/methods.ts
index ad3c6287fa..8a5d7ad9aa 100644
--- a/packages/babel-generator/src/generators/methods.ts
+++ b/packages/babel-generator/src/generators/methods.ts
@@ -84,6 +84,7 @@ export function _functionHead(this: Printer, node: any) {
   }
   this.word("function");
   if (node.generator) this.token("*");
+  this.printInnerComments(node);
 
   this.space();
   if (node.id) {
diff --git a/packages/babel-generator/test/fixtures/comments/function-inner-comment/input.js b/packages/babel-generator/test/fixtures/comments/function-inner-comment/input.js
new file mode 100644
index 0000000000..f738be6325
--- /dev/null
+++ b/packages/babel-generator/test/fixtures/comments/function-inner-comment/input.js
@@ -0,0 +1,7 @@
+const f = function /*foo*/ () {};
+const g = async function /*foo*/ () {};
+const h = async /*foo*/ function () {};
+const i = function* /*foo*/ () {};
+const j = function/*foo*/* () {};
+const k = async function* /*foo*/ () {};
+const l = function (/*foo*/) {};
diff --git a/packages/babel-generator/test/fixtures/comments/function-inner-comment/options.json b/packages/babel-generator/test/fixtures/comments/function-inner-comment/options.json
new file mode 100644
index 0000000000..97925bbcb6
--- /dev/null
+++ b/packages/babel-generator/test/fixtures/comments/function-inner-comment/options.json
@@ -0,0 +1,3 @@
+{
+  "retainLines": true
+}
diff --git a/packages/babel-generator/test/fixtures/comments/function-inner-comment/output.js b/packages/babel-generator/test/fixtures/comments/function-inner-comment/output.js
new file mode 100644
index 0000000000..ac7dc075eb
--- /dev/null
+++ b/packages/babel-generator/test/fixtures/comments/function-inner-comment/output.js
@@ -0,0 +1,7 @@
+const f = function /*foo*/ () {};
+const g = async function /*foo*/ () {};
+const h = async function /*foo*/ () {};
+const i = function* /*foo*/ () {};
+const j = function* /*foo*/ () {};
+const k = async function* /*foo*/ () {};
+const l = function /*foo*/ () {};