fix(es/decorators): decorator private prop init

crates/swc_ecma_transforms_proposal/src/decorator_impl.rs

@@ -820,42 +820,9 @@ impl VisitMut for DecoratorPass {
                 args: vec![ThisExpr { span: DUMMY_SP }.as_arg()],
                 ..Default::default()
             };
-            let mut proto_inited = false;
-            for member in n.body.iter_mut() {
-                if let ClassMember::ClassProp(prop) = member {
-                    if prop.is_static {
-                        continue;
-                    }
-                    if let Some(value) = prop.value.clone() {
-                        prop.value = Some(Expr::from_exprs(vec![
-                            init_proto_expr.clone().into(),
-                            value,
-                        ]));
-
-                        proto_inited = true;
-                        break;
-                    }
-                } else if let ClassMember::PrivateProp(prop) = member {
-                    if prop.is_static {
-                        continue;
-                    }
-                    if let Some(value) = prop.value.clone() {
-                        prop.value = Some(Expr::from_exprs(vec![
-                            init_proto_expr.clone().into(),
-                            value,
-                        ]));
-
-                        proto_inited = true;
-                        break;
-                    }
-                }
-            }
+            let c = self.ensure_constructor(n);
 
-            if !proto_inited {
-                let c = self.ensure_constructor(n);
-
-                inject_after_super(c, vec![Box::new(init_proto_expr.into())])
-            }
+            inject_after_super(c, vec![Box::new(init_proto_expr.into())])
         }
 
         self.consume_inits();
@@ -1780,6 +1747,9 @@ impl VisitMut for DecoratorPass {
             self.state.init_static_args.push(Some(initialize_init));
         } else {
             self.state.proto_lhs.push(init);
+            self.state
+                .init_proto
+                .get_or_insert_with(|| private_ident!("_initProto"));
             self.state.init_proto_args.push(Some(initialize_init));
         }
     }

crates/swc_ecma_transforms_proposal/tests/decorators/2022-03-accessors--to-es2015/private/output.js

@@ -13,12 +13,13 @@ class Foo {
         });
         _class_private_field_init(this, ___a_1, {
             writable: true,
-            value: (_initProto(this), _init_a(this))
+            value: _init_a(this)
         });
         _class_private_field_init(this, ___b_2, {
             writable: true,
             value: _init_b(this, 123)
         });
+        _initProto(this);
     }
 }
 ({ e: [_init_a, _get___a, _set___a, _init_b, _get___b, _set___b, _initProto] } = _apply_decs_2203_r(Foo, [

crates/swc_ecma_transforms_proposal/tests/decorators/2022-03-accessors--to-es2015/public/output.js

@@ -25,7 +25,7 @@ class Foo {
     constructor(){
         _class_private_field_init(this, ____private_a_1, {
             writable: true,
-            value: (_initProto(this), _init_a(this))
+            value: _init_a(this)
         });
         _class_private_field_init(this, ____private_b_2, {
             writable: true,
@@ -35,6 +35,7 @@ class Foo {
             writable: true,
             value: _init_computedKey(this, 456)
         });
+        _initProto(this);
     }
 }
 ({ e: [_init_a, _init_b, _init_computedKey, _initProto] } = _apply_decs_2203_r(Foo, [

crates/swc_ecma_transforms_proposal/tests/decorators/2022-03-accessors/private/output.js

@@ -27,7 +27,10 @@ class Foo {
             ]
         ], []));
     }
-    #__a_1 = (_initProto(this), _init_a(this));
+    constructor(){
+        _initProto(this);
+    }
+    #__a_1 = _init_a(this);
     get #a() {
         return _get___a(this);
     }

crates/swc_ecma_transforms_proposal/tests/decorators/2022-03-accessors/public/output.js

@@ -21,7 +21,10 @@ class Foo {
             ]
         ], []));
     }
-    #___private_a_1 = (_initProto(this), _init_a(this));
+    constructor(){
+        _initProto(this);
+    }
+    #___private_a_1 = _init_a(this);
     get a() {
         return this.#___private_a_1;
     }

crates/swc_ecma_transforms_proposal/tests/decorators/2022-03-duplicated-keys--to-es2015/.method-and-field/output.js

@@ -2,7 +2,8 @@ var _init_a, _initProto;
 const dec = () => { };
 class Foo {
   constructor() {
-    defineProperty(this, "a", (_initProto(this), _init_a(this, 123)));
+    defineProperty(this, "a", _init_a(this, 123));
+    _initProto(this);
   }
   a() {
     return 1;

crates/swc_ecma_transforms_proposal/tests/decorators/2022-03-duplicated-keys/method-and-field/output.js

@@ -15,7 +15,10 @@ class Foo {
             ]
         ], []));
     }
-    a = (_initProto(this), _init_a(this, 123));
+    constructor(){
+        _initProto(this);
+    }
+    a = _init_a(this, 123);
     a() {
         return 1;
     }

crates/swc_ecma_transforms_proposal/tests/decorators/2022-03-fields--to-es2015/private/output.js

@@ -1,4 +1,4 @@
-var _init_a, _init_b;
+var _init_a, _init_b, _initProto;
 const dec = ()=>{};
 var _a = /*#__PURE__*/ new WeakMap(), _b = /*#__PURE__*/ new WeakMap();
 class Foo {
@@ -11,9 +11,10 @@ class Foo {
             writable: true,
             value: _init_b(this, 123)
         });
+        _initProto(this);
     }
 }
-({ e: [_init_a, _init_b] } = _apply_decs_2203_r(Foo, [
+({ e: [_init_a, _init_b, _initProto] } = _apply_decs_2203_r(Foo, [
     [
         dec,
         0,

crates/swc_ecma_transforms_proposal/tests/decorators/2022-03-fields/private/output.js

@@ -1,8 +1,8 @@
-var _init_a, _init_b;
+var _init_a, _init_b, _initProto;
 const dec = ()=>{};
 class Foo {
     static{
-        ({ e: [_init_a, _init_b]  } = _apply_decs_2203_r(this, [
+        ({ e: [_init_a, _init_b, _initProto]  } = _apply_decs_2203_r(this, [
             [
                 dec,
                 0,
@@ -27,6 +27,9 @@ class Foo {
             ]
         ], []));
     }
+    constructor(){
+        _initProto(this);
+    }
     #a = _init_a(this);
     #b = _init_b(this, 123);
 }

crates/swc_ecma_transforms_proposal/tests/decorators/2022-03-getters--to-es2015/private/output.js

@@ -10,7 +10,8 @@ class Foo {
             get: get_a,
             set: void 0
         });
-        _define_property(this, "value", (_initProto(this), 1));
+        _define_property(this, "value", 1);
+        _initProto(this);
     }
 }
 ({ e: [_call_a, _initProto] } = _apply_decs_2203_r(Foo, [

crates/swc_ecma_transforms_proposal/tests/decorators/2022-03-getters--to-es2015/public/output.js

@@ -10,7 +10,8 @@ class Foo {
         return this.value;
     }
     constructor(){
-        _define_property(this, "value", (_initProto(this), 1));
+        _define_property(this, "value", 1);
+        _initProto(this);
     }
 }
 ({ e: [_initProto] } = _apply_decs_2203_r(Foo, [

crates/swc_ecma_transforms_proposal/tests/decorators/2022-03-getters-and-setters--to-es2015/private/output.js

@@ -13,7 +13,8 @@ class Foo {
             get: get_a,
             set: set_a
         });
-        _define_property(this, "value", (_initProto(this), 1));
+        _define_property(this, "value", 1);
+        _initProto(this);
     }
 }
 ({ e: [_call_a, _call_a1, _initProto] } = _apply_decs_2203_r(Foo, [

crates/swc_ecma_transforms_proposal/tests/decorators/2022-03-getters-and-setters--to-es2015/public/output.js

@@ -16,7 +16,8 @@ class Foo {
         this.value = v;
     }
     constructor(){
-        _define_property(this, "value", (_initProto(this), 1));
+        _define_property(this, "value", 1);
+        _initProto(this);
     }
 }
 ({ e: [_initProto] } = _apply_decs_2203_r(Foo, [

crates/swc_ecma_transforms_proposal/tests/decorators/2022-03-getters-and-setters/private/output.js

@@ -21,7 +21,10 @@ class Foo {
             ]
         ], []));
     }
-    value = (_initProto(this), 1);
+    constructor(){
+        _initProto(this);
+    }
+    value = 1;
     get #a() {
         return _call_a(this);
     }

crates/swc_ecma_transforms_proposal/tests/decorators/2022-03-getters-and-setters/public/output.js

@@ -26,7 +26,10 @@ class Foo {
             ]
         ], []));
     }
-    value = (_initProto(this), 1);
+    constructor(){
+        _initProto(this);
+    }
+    value = 1;
     get a() {
         return this.value;
     }

crates/swc_ecma_transforms_proposal/tests/decorators/2022-03-getters/private/output.js

@@ -13,7 +13,10 @@ class Foo {
             ]
         ], []));
     }
-    value = (_initProto(this), 1);
+    constructor(){
+        _initProto(this);
+    }
+    value = 1;
     get #a() {
         return _call_a(this);
     }

crates/swc_ecma_transforms_proposal/tests/decorators/2022-03-getters/public/output.js

@@ -16,7 +16,10 @@ class Foo {
             ]
         ], []));
     }
-    value = (_initProto(this), 1);
+    constructor(){
+        _initProto(this);
+    }
+    value = 1;
     get a() {
         return this.value;
     }

crates/swc_ecma_transforms_proposal/tests/decorators/2022-03-methods--to-es2015/private/output.js

@@ -10,7 +10,8 @@ class Foo {
             get: get_a,
             set: void 0
         });
-        _define_property(this, "value", (_initProto(this), 1));
+        _define_property(this, "value", 1);
+        _initProto(this);
     }
 }
 ({ e: [_call_a, _initProto] } = _apply_decs_2203_r(Foo, [

crates/swc_ecma_transforms_proposal/tests/decorators/2022-03-methods--to-es2015/public/output.js

@@ -10,7 +10,8 @@ class Foo {
         return this.value;
     }
     constructor(){
-        _define_property(this, "value", (_initProto(this), 1));
+        _define_property(this, "value", 1);
+        _initProto(this);
     }
 }
 ({ e: [_initProto] } = _apply_decs_2203_r(Foo, [

crates/swc_ecma_transforms_proposal/tests/decorators/2022-03-methods/private/output.js

@@ -13,7 +13,10 @@ class Foo {
             ]
         ], []));
     }
-    value = (_initProto(this), 1);
+    constructor(){
+        _initProto(this);
+    }
+    value = 1;
     get #a() {
         return _call_a;
     }

crates/swc_ecma_transforms_proposal/tests/decorators/2022-03-methods/public/output.js

@@ -16,7 +16,10 @@ class Foo {
             ]
         ], []));
     }
-    value = (_initProto(this), 1);
+    constructor(){
+        _initProto(this);
+    }
+    value = 1;
     a() {
         return this.value;
     }

crates/swc_ecma_transforms_proposal/tests/decorators/2022-03-misc/all-decorators/output.js

@@ -144,7 +144,10 @@ new class extends _identity {
                 ]));
                 _initStatic(this);
             }
-            a = (_initProto(this), _init_a(this));
+            constructor(){
+                _initProto(this);
+            }
+            a = _init_a(this);
             b() {}
             get c() {}
             set c(v) {}