feat(es): Expose stage 3 decorator (#7220)

crates/swc/src/config/mod.rs

@@ -703,11 +703,20 @@ impl Options {
             })),
             // Decorators may use type information
             Optional::new(
-                decorators(decorators::Config {
-                    legacy: transform.legacy_decorator.into_bool(),
-                    emit_metadata: transform.decorator_metadata.into_bool(),
-                    use_define_for_class_fields: !assumptions.set_public_class_fields
-                }),
+                match transform.decorator_version.unwrap_or_default() {
+                    DecoratorVersion::V202112 => {
+                        Either::Left(decorators(decorators::Config {
+                            legacy: transform.legacy_decorator.into_bool(),
+                            emit_metadata: transform.decorator_metadata.into_bool(),
+                            use_define_for_class_fields: !assumptions.set_public_class_fields,
+                        }))
+                    }
+                    DecoratorVersion::V202203 => {
+                        Either::Right(
+                            swc_ecma_transforms::proposals::decorator_2022_03::decorator_2022_03(),
+                        )
+                    }
+                },
                 syntax.decorators()
             ),
             // The transform strips import assertions, so it's only enabled if
@@ -1552,6 +1561,20 @@ pub struct TransformConfig {
 
     #[serde(default)]
     pub use_define_for_class_fields: BoolConfig<true>,
+
+    #[serde(default)]
+    pub decorator_version: Option<DecoratorVersion>,
+}
+
+#[derive(Debug, Default, Clone, Copy, Serialize, Deserialize)]
+#[serde(deny_unknown_fields, rename_all = "camelCase")]
+pub enum DecoratorVersion {
+    #[default]
+    #[serde(rename = "2021-12")]
+    V202112,
+
+    #[serde(rename = "2022-03")]
+    V202203,
 }
 
 #[derive(Debug, Default, Clone, Serialize, Deserialize, Merge)]

crates/swc/tests/fixture/issues-7xxx/7220/1/input/.swcrc

@@ -0,0 +1,11 @@
+{
+    "jsc": {
+        "parser": {
+            "syntax": "ecmascript",
+            "decorators": true
+        },
+        "transform": {
+            "decoratorVersion": "2022-03"
+        }
+    }
+}

crates/swc/tests/fixture/issues-7xxx/7220/1/input/index.js

@@ -0,0 +1,14 @@
+const _BOUND_FUNCTIONS = {};
+
+export class BackgroundJob {
+}
+
+class TestClass {
+    calls = [];
+
+    @BackgroundJob.bind
+    success(s, n) {
+        this.calls.push(`success(${s}, ${n})`);
+        return Promise.resolve();
+    }
+}

crates/swc/tests/fixture/issues-7xxx/7220/1/output/index.js

@@ -0,0 +1,40 @@
+import { _ as _class_call_check } from "@swc/helpers/_/_class_call_check";
+import { _ as _create_class } from "@swc/helpers/_/_create_class";
+import { _ as _define_property } from "@swc/helpers/_/_define_property";
+import { _ as _sliced_to_array } from "@swc/helpers/_/_sliced_to_array";
+import { _ as _apply_decs_2203_r } from "@swc/helpers/_/_apply_decs_2203_r";
+var _dec, _initProto;
+var _BOUND_FUNCTIONS = {};
+export var BackgroundJob = function BackgroundJob() {
+    "use strict";
+    _class_call_check(this, BackgroundJob);
+};
+_dec = BackgroundJob.bind;
+var TestClass = /*#__PURE__*/ function() {
+    "use strict";
+    function TestClass() {
+        _class_call_check(this, TestClass);
+        _define_property(this, "calls", []);
+        _initProto(this);
+    }
+    _create_class(TestClass, [
+        {
+            key: "success",
+            value: function success(s, n) {
+                this.calls.push("success(".concat(s, ", ").concat(n, ")"));
+                return Promise.resolve();
+            }
+        }
+    ]);
+    return TestClass;
+}();
+(function() {
+    var ref, ref1;
+    ref = _apply_decs_2203_r(TestClass, [
+        [
+            _dec,
+            2,
+            "success"
+        ]
+    ], []), ref1 = _sliced_to_array(ref.e, 1), _initProto = ref1[0], ref1, ref;
+})();