From 0c8c3d7d51e49ad9050224a8647ebc55a0262b35 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Donny/=EA=B0=95=EB=8F=99=EC=9C=A4?= <kdy1997.dev@gmail.com>
Date: Tue, 15 Mar 2022 18:14:47 +0900
Subject: [PATCH] fix(es/decorator): Remove `noop_fold_type` (#4022)

---
 .../decorators/issue-4021/input/.swcrc        | 23 +++++++++++++++++++
 .../decorators/issue-4021/input/index.ts      |  2 ++
 .../decorators/issue-4021/output/index.ts     |  8 +++++++
 .../src/decorators/legacy/mod.rs              |  4 +---
 4 files changed, 34 insertions(+), 3 deletions(-)
 create mode 100644 crates/swc/tests/fixture/decorators/issue-4021/input/.swcrc
 create mode 100644 crates/swc/tests/fixture/decorators/issue-4021/input/index.ts
 create mode 100644 crates/swc/tests/fixture/decorators/issue-4021/output/index.ts

diff --git a/crates/swc/tests/fixture/decorators/issue-4021/input/.swcrc b/crates/swc/tests/fixture/decorators/issue-4021/input/.swcrc
new file mode 100644
index 00000000000..e08844a4cbf
--- /dev/null
+++ b/crates/swc/tests/fixture/decorators/issue-4021/input/.swcrc
@@ -0,0 +1,23 @@
+{
+    "jsc": {
+        "parser": {
+            "syntax": "typescript",
+            "tsx": false,
+            "decorators": true
+        },
+        "target": "es2022",
+        "loose": false,
+        "transform": {
+            "legacyDecorator": true,
+            "decoratorMetadata": false
+        },
+        "minify": {
+            "compress": false,
+            "mangle": false
+        }
+    },
+    "module": {
+        "type": "es6"
+    },
+    "minify": false
+}
\ No newline at end of file
diff --git a/crates/swc/tests/fixture/decorators/issue-4021/input/index.ts b/crates/swc/tests/fixture/decorators/issue-4021/input/index.ts
new file mode 100644
index 00000000000..639683fb3a5
--- /dev/null
+++ b/crates/swc/tests/fixture/decorators/issue-4021/input/index.ts
@@ -0,0 +1,2 @@
+namespace N { @foo class C1 { } }
+@foo class C2 { }
\ No newline at end of file
diff --git a/crates/swc/tests/fixture/decorators/issue-4021/output/index.ts b/crates/swc/tests/fixture/decorators/issue-4021/output/index.ts
new file mode 100644
index 00000000000..19f4255d02d
--- /dev/null
+++ b/crates/swc/tests/fixture/decorators/issue-4021/output/index.ts
@@ -0,0 +1,8 @@
+var _class, _class1;
+var N;
+(function(N) {
+    let C1 = _class = foo((_class = class C1 {
+    }) || _class) || _class;
+})(N || (N = {}));
+let C2 = _class1 = foo((_class1 = class C2 {
+}) || _class1) || _class1;
diff --git a/crates/swc_ecma_transforms_proposal/src/decorators/legacy/mod.rs b/crates/swc_ecma_transforms_proposal/src/decorators/legacy/mod.rs
index bd5837afb0c..103d475b659 100644
--- a/crates/swc_ecma_transforms_proposal/src/decorators/legacy/mod.rs
+++ b/crates/swc_ecma_transforms_proposal/src/decorators/legacy/mod.rs
@@ -10,7 +10,7 @@ use swc_ecma_utils::{
     prop_name_to_expr, prop_name_to_expr_value, quote_ident, replace_ident, undefined, ExprFactory,
     ModuleItemLike, StmtLike,
 };
-use swc_ecma_visit::{noop_fold_type, Fold, FoldWith, Visit, VisitWith};
+use swc_ecma_visit::{Fold, FoldWith, Visit, VisitWith};
 
 use self::metadata::{Metadata, ParamMetadata};
 use super::{contains_decorator, DecoratorFinder};
@@ -86,8 +86,6 @@ impl Visit for Legacy {
 
 /// TODO: VisitMut
 impl Fold for Legacy {
-    noop_fold_type!();
-
     fn fold_decl(&mut self, decl: Decl) -> Decl {
         let decl: Decl = decl.fold_children_with(self);