fix(transformer/legacy-decorator): decorated fields with the declare modifier are not transformed

crates/oxc_transformer/src/decorator/legacy/metadata.rs

@@ -174,7 +174,7 @@ impl<'a> Traverse<'a, TransformState<'a>> for LegacyDecoratorMetadata<'a, '_> {
         prop: &mut PropertyDefinition<'a>,
         ctx: &mut TraverseCtx<'a>,
     ) {
-        if prop.declare || prop.decorators.is_empty() {
+        if prop.decorators.is_empty() {
             return;
         }
         prop.decorators.push(self.create_design_type_metadata(prop.type_annotation.as_ref(), ctx));

crates/oxc_transformer/src/decorator/legacy/mod.rs

@@ -885,8 +885,8 @@ impl<'a> LegacyDecorator<'a, '_> {
                             PrivateInExpressionDetector::has_private_in_expression_in_method_decorator(method);
                     }
                 }
-                ClassElement::PropertyDefinition(prop) if !prop.declare => {
-                    class_element_is_decorated |= !prop.decorators.is_empty();
+                ClassElement::PropertyDefinition(prop) if !prop.decorators.is_empty() => {
+                    class_element_is_decorated = true;
 
                     if class_element_is_decorated && !has_private_in_expression_in_decorator {
                         has_private_in_expression_in_decorator =
@@ -895,8 +895,8 @@ impl<'a> LegacyDecorator<'a, '_> {
                             );
                     }
                 }
-                ClassElement::AccessorProperty(accessor) => {
-                    class_element_is_decorated |= !accessor.decorators.is_empty();
+                ClassElement::AccessorProperty(accessor) if !accessor.decorators.is_empty() => {
+                    class_element_is_decorated = true;
 
                     if class_element_is_decorated && !has_private_in_expression_in_decorator {
                         has_private_in_expression_in_decorator =

crates/oxc_transformer/src/lib.rs

@@ -303,9 +303,6 @@ impl<'a> Traverse<'a, TransformState<'a>> for TransformerImpl<'a, '_> {
     }
 
     fn enter_class_body(&mut self, body: &mut ClassBody<'a>, ctx: &mut TraverseCtx<'a>) {
-        if let Some(typescript) = self.x0_typescript.as_mut() {
-            typescript.enter_class_body(body, ctx);
-        }
         self.x2_es2022.enter_class_body(body, ctx);
     }
 

crates/oxc_transformer/src/typescript/annotations.rs

@@ -223,9 +223,9 @@ impl<'a> Traverse<'a, TransformState<'a>> for TypeScriptAnnotations<'a, '_> {
         class.r#abstract = false;
     }
 
-    fn enter_class_body(&mut self, body: &mut ClassBody<'a>, _ctx: &mut TraverseCtx<'a>) {
+    fn exit_class(&mut self, class: &mut Class<'a>, _: &mut TraverseCtx<'a>) {
         // Remove type only members
-        body.body.retain(|elem| match elem {
+        class.body.body.retain(|elem| match elem {
             ClassElement::MethodDefinition(method) => {
                 matches!(method.r#type, MethodDefinitionType::MethodDefinition)
                     && !method.value.is_typescript_syntax()
@@ -346,7 +346,6 @@ impl<'a> Traverse<'a, TransformState<'a>> for TypeScriptAnnotations<'a, '_> {
         );
 
         def.accessibility = None;
-        def.declare = false;
         def.definite = false;
         def.r#override = false;
         def.optional = false;

crates/oxc_transformer/src/typescript/class.rs

@@ -246,14 +246,13 @@ impl<'a> TypeScript<'a, '_> {
         constructor: &mut MethodDefinition<'a>,
         ctx: &mut TraverseCtx<'a>,
     ) {
-        if !constructor.kind.is_constructor() {
+        if !constructor.kind.is_constructor() || constructor.value.body.is_none() {
             return;
         }
 
         let params = &constructor.value.params.items;
         let assignments = Self::convert_constructor_params(params, ctx).collect::<Vec<_>>();
 
-        // `constructor {}` is guaranteed that it is `Some`.
         let constructor_body_statements = &mut constructor.value.body.as_mut().unwrap().statements;
         let super_call_position = Self::get_super_call_position(constructor_body_statements);
 

crates/oxc_transformer/src/typescript/mod.rs

@@ -131,13 +131,10 @@ impl<'a> Traverse<'a, TransformState<'a>> for TypeScript<'a, '_> {
     }
 
     fn exit_class(&mut self, class: &mut Class<'a>, ctx: &mut TraverseCtx<'a>) {
+        self.annotations.exit_class(class, ctx);
         self.transform_class_on_exit(class, ctx);
     }
 
-    fn enter_class_body(&mut self, body: &mut ClassBody<'a>, ctx: &mut TraverseCtx<'a>) {
-        self.annotations.enter_class_body(body, ctx);
-    }
-
     fn enter_expression(&mut self, expr: &mut Expression<'a>, ctx: &mut TraverseCtx<'a>) {
         self.annotations.enter_expression(expr, ctx);
     }

tasks/coverage/snapshots/semantic_babel.snap

@@ -2,7 +2,7 @@ commit: 1d4546bc
 
 semantic_babel Summary:
 AST Parsed     : 2362/2362 (100.00%)
-Positive Passed: 1948/2362 (82.47%)
+Positive Passed: 1949/2362 (82.51%)
 semantic Error: tasks/coverage/babel/packages/babel-parser/test/fixtures/comments/decorators/decorators-after-export/input.js
 Symbol span mismatch for "C":
 after transform: SymbolId(0): Span { start: 65, end: 66 }
@@ -116,14 +116,20 @@ after transform: ScopeId(1): [ScopeId(2)]
 rebuilt        : ScopeId(1): []
 
 semantic Error: tasks/coverage/babel/packages/babel-parser/test/fixtures/estree/class-private-method/typescript-invalid-abstract/input.ts
+Bindings mismatch:
+after transform: ScopeId(0): ["TSAbstractClass", "_TSAbstractClass_brand", "_classPrivateMethodInitSpec", "_foo"]
+rebuilt        : ScopeId(0): ["TSAbstractClass", "_TSAbstractClass_brand", "_classPrivateMethodInitSpec"]
 Scope children mismatch:
-after transform: ScopeId(1): [ScopeId(2)]
-rebuilt        : ScopeId(1): []
+after transform: ScopeId(1): [ScopeId(2), ScopeId(3)]
+rebuilt        : ScopeId(1): [ScopeId(2)]
 
 semantic Error: tasks/coverage/babel/packages/babel-parser/test/fixtures/estree/class-private-method/typescript-invalid-abstract-babel-7/input.ts
+Bindings mismatch:
+after transform: ScopeId(0): ["TSAbstractClass", "_TSAbstractClass_brand", "_classPrivateMethodInitSpec", "_foo"]
+rebuilt        : ScopeId(0): ["TSAbstractClass", "_TSAbstractClass_brand", "_classPrivateMethodInitSpec"]
 Scope children mismatch:
-after transform: ScopeId(1): [ScopeId(2)]
-rebuilt        : ScopeId(1): []
+after transform: ScopeId(1): [ScopeId(2), ScopeId(3)]
+rebuilt        : ScopeId(1): [ScopeId(2)]
 
 semantic Error: tasks/coverage/babel/packages/babel-parser/test/fixtures/estree/class-private-property/typescript/input.js
 Unresolved references mismatch:
@@ -401,11 +407,6 @@ Multiple constructor implementations are not allowed.
 semantic Error: tasks/coverage/babel/packages/babel-parser/test/fixtures/typescript/class/declare/input.ts
 Identifier `x` has already been declared
 
-semantic Error: tasks/coverage/babel/packages/babel-parser/test/fixtures/typescript/class/declare-readonly-field-initializer/input.ts
-Unresolved references mismatch:
-after transform: ["a"]
-rebuilt        : []
-
 semantic Error: tasks/coverage/babel/packages/babel-parser/test/fixtures/typescript/class/expression-extends/input.ts
 Unresolved references mismatch:
 after transform: ["T", "f"]
@@ -528,6 +529,9 @@ semantic Error: tasks/coverage/babel/packages/babel-parser/test/fixtures/typescr
 A required parameter cannot follow an optional parameter.
 
 semantic Error: tasks/coverage/babel/packages/babel-parser/test/fixtures/typescript/class/private-method-overload/input.ts
+Bindings mismatch:
+after transform: ScopeId(0): ["Test", "_Test_brand", "_classPrivateMethodInitSpec", "_f", "_f2", "_f3"]
+rebuilt        : ScopeId(0): ["Test", "_Test_brand", "_classPrivateMethodInitSpec", "_f"]
 Scope children mismatch:
 after transform: ScopeId(1): [ScopeId(2), ScopeId(3), ScopeId(5)]
 rebuilt        : ScopeId(1): [ScopeId(2)]

tasks/coverage/snapshots/semantic_typescript.snap

@@ -216,10 +216,10 @@ rebuilt        : ScopeId(0): []
 semantic Error: tasks/coverage/typescript/tests/cases/compiler/abstractPropertyBasics.ts
 Scope children mismatch:
 after transform: ScopeId(0): [ScopeId(1), ScopeId(3), ScopeId(7)]
-rebuilt        : ScopeId(0): [ScopeId(1), ScopeId(2)]
+rebuilt        : ScopeId(0): [ScopeId(1), ScopeId(3)]
 Scope children mismatch:
-after transform: ScopeId(3): [ScopeId(4), ScopeId(5), ScopeId(6)]
-rebuilt        : ScopeId(1): []
+after transform: ScopeId(3): [ScopeId(4), ScopeId(5), ScopeId(6), ScopeId(11)]
+rebuilt        : ScopeId(1): [ScopeId(2)]
 
 semantic Error: tasks/coverage/typescript/tests/cases/compiler/acceptableAlias1.ts
 Bindings mismatch:
@@ -8625,12 +8625,9 @@ after transform: SymbolId(0): [ReferenceId(2), ReferenceId(8), ReferenceId(9)]
 rebuilt        : SymbolId(0): [ReferenceId(8), ReferenceId(9)]
 
 semantic Error: tasks/coverage/typescript/tests/cases/compiler/decoratorMetadataElidedImportOnDeclare.ts
-Bindings mismatch:
-after transform: ScopeId(0): ["Observable", "Test", "whatever"]
-rebuilt        : ScopeId(0): ["Test", "whatever"]
-Symbol reference IDs mismatch for "whatever":
-after transform: SymbolId(1): [ReferenceId(0)]
-rebuilt        : SymbolId(0): []
+Symbol reference IDs mismatch for "Observable":
+after transform: SymbolId(0): [ReferenceId(1), ReferenceId(3), ReferenceId(4)]
+rebuilt        : SymbolId(0): [ReferenceId(5), ReferenceId(6)]
 
 semantic Error: tasks/coverage/typescript/tests/cases/compiler/decoratorMetadataForMethodWithNoReturnTypeAnnotation01.ts
 Bindings mismatch:
@@ -12966,21 +12963,27 @@ after transform: ["DecoratorContext", "require"]
 rebuilt        : ["require"]
 
 semantic Error: tasks/coverage/typescript/tests/cases/compiler/esNextWeakRefs_IterableWeakMap.ts
+Symbol reference IDs mismatch for "_Symbol$toStringTag":
+after transform: SymbolId(26): [ReferenceId(73), ReferenceId(74)]
+rebuilt        : SymbolId(3): [ReferenceId(6)]
+Symbol reference IDs mismatch for "_Symbol$iterator":
+after transform: SymbolId(29): [ReferenceId(82), ReferenceId(83)]
+rebuilt        : SymbolId(4): [ReferenceId(18)]
 Unresolved references mismatch:
 after transform: ["FinalizationRegistry", "Generator", "Iterable", "Object", "Set", "Symbol", "WeakMap", "WeakRef", "undefined"]
 rebuilt        : ["FinalizationRegistry", "Object", "Set", "Symbol", "WeakMap", "WeakRef", "undefined"]
 Unresolved reference IDs mismatch for "WeakRef":
 after transform: [ReferenceId(0), ReferenceId(2), ReferenceId(11), ReferenceId(15), ReferenceId(33)]
-rebuilt        : [ReferenceId(26)]
+rebuilt        : [ReferenceId(30)]
 Unresolved reference IDs mismatch for "Set":
 after transform: [ReferenceId(1), ReferenceId(14)]
-rebuilt        : [ReferenceId(10)]
+rebuilt        : [ReferenceId(12)]
 Unresolved reference IDs mismatch for "Symbol":
 after transform: [ReferenceId(8), ReferenceId(55), ReferenceId(69), ReferenceId(72)]
-rebuilt        : [ReferenceId(81), ReferenceId(84)]
+rebuilt        : [ReferenceId(85), ReferenceId(88)]
 Unresolved reference IDs mismatch for "WeakMap":
-after transform: [ReferenceId(5), ReferenceId(9), ReferenceId(108), ReferenceId(109), ReferenceId(110)]
-rebuilt        : [ReferenceId(2), ReferenceId(3), ReferenceId(4), ReferenceId(7)]
+after transform: [ReferenceId(5), ReferenceId(9), ReferenceId(114), ReferenceId(115), ReferenceId(116)]
+rebuilt        : [ReferenceId(2), ReferenceId(3), ReferenceId(4), ReferenceId(9)]
 
 semantic Error: tasks/coverage/typescript/tests/cases/compiler/escapedIdentifiers.ts
 Namespaces exporting non-const are not supported by Babel. Change to const or see: https://babeljs.io/docs/en/babel-plugin-transform-typescript
@@ -18816,14 +18819,17 @@ rebuilt        : ScopeId(0): []
 
 semantic Error: tasks/coverage/typescript/tests/cases/compiler/iterableTReturnTNext.ts
 Bindings mismatch:
-after transform: ScopeId(0): ["MyMap", "_source", "_wrapAsyncGenerator", "doubles", "map", "r1", "r2", "r3", "set", "source"]
-rebuilt        : ScopeId(0): ["MyMap", "_source", "_wrapAsyncGenerator", "doubles", "r1", "r2", "r3", "source"]
+after transform: ScopeId(0): ["MyMap", "_Symbol$iterator", "_Symbol$toStringTag", "_defineProperty", "_source", "_wrapAsyncGenerator", "doubles", "map", "r1", "r2", "r3", "set", "source"]
+rebuilt        : ScopeId(0): ["MyMap", "_Symbol$iterator", "_Symbol$toStringTag", "_defineProperty", "_source", "_wrapAsyncGenerator", "doubles", "r1", "r2", "r3", "source"]
 Scope children mismatch:
 after transform: ScopeId(0): [ScopeId(1), ScopeId(3), ScopeId(15), ScopeId(16)]
 rebuilt        : ScopeId(0): [ScopeId(1), ScopeId(2), ScopeId(4)]
 Scope children mismatch:
 after transform: ScopeId(6): [ScopeId(7)]
-rebuilt        : ScopeId(7): []
+rebuilt        : ScopeId(8): []
+Symbol reference IDs mismatch for "_Symbol$toStringTag":
+after transform: SymbolId(20): [ReferenceId(29), ReferenceId(30)]
+rebuilt        : SymbolId(2): [ReferenceId(19)]
 Reference symbol mismatch for "map":
 after transform: SymbolId(0) "map"
 rebuilt        : <None>
@@ -18838,7 +18844,7 @@ after transform: ["Error", "Map", "MapIterator", "Set", "Symbol", "arguments", "
 rebuilt        : ["Error", "Symbol", "arguments", "map", "require", "set", "undefined"]
 Unresolved reference IDs mismatch for "Symbol":
 after transform: [ReferenceId(10), ReferenceId(17)]
-rebuilt        : [ReferenceId(15)]
+rebuilt        : [ReferenceId(14)]
 
 semantic Error: tasks/coverage/typescript/tests/cases/compiler/jqueryInference.ts
 Bindings mismatch:
@@ -19837,13 +19843,13 @@ rebuilt        : []
 semantic Error: tasks/coverage/typescript/tests/cases/compiler/mergedInstantiationAssignment.ts
 Symbol reference IDs mismatch for "GenericObject":
 after transform: SymbolId(0): [ReferenceId(1), ReferenceId(2)]
-rebuilt        : SymbolId(0): [ReferenceId(0)]
+rebuilt        : SymbolId(1): [ReferenceId(1)]
 Symbol reference IDs mismatch for "GenericObjectWithoutSetter":
 after transform: SymbolId(4): [ReferenceId(5), ReferenceId(6)]
-rebuilt        : SymbolId(3): [ReferenceId(2)]
+rebuilt        : SymbolId(4): [ReferenceId(4)]
 Symbol reference IDs mismatch for "NormalObject":
 after transform: SymbolId(7): [ReferenceId(8), ReferenceId(9)]
-rebuilt        : SymbolId(5): [ReferenceId(4)]
+rebuilt        : SymbolId(6): [ReferenceId(6)]
 
 semantic Error: tasks/coverage/typescript/tests/cases/compiler/mergedInterfaceFromMultipleFiles1.ts
 Scope children mismatch:
@@ -36363,14 +36369,20 @@ rebuilt        : ["Object", "dec", "require"]
 
 semantic Error: tasks/coverage/typescript/tests/cases/conformance/decorators/decoratorInAmbientContext.ts
 Bindings mismatch:
-after transform: ScopeId(0): ["Foo", "b", "decorator"]
-rebuilt        : ScopeId(0): ["Foo", "b"]
+after transform: ScopeId(0): ["Foo", "_decorate", "_decorateMetadata", "_defineProperty", "b", "decorator"]
+rebuilt        : ScopeId(0): ["Foo", "_decorate", "_decorateMetadata", "_defineProperty", "b"]
 Scope children mismatch:
 after transform: ScopeId(0): [ScopeId(1), ScopeId(2)]
 rebuilt        : ScopeId(0): [ScopeId(1)]
-Symbol reference IDs mismatch for "b":
-after transform: SymbolId(3): [ReferenceId(3)]
-rebuilt        : SymbolId(0): []
+Reference symbol mismatch for "decorator":
+after transform: SymbolId(0) "decorator"
+rebuilt        : <None>
+Reference symbol mismatch for "decorator":
+after transform: SymbolId(0) "decorator"
+rebuilt        : <None>
+Unresolved references mismatch:
+after transform: ["Number", "Symbol", "require"]
+rebuilt        : ["Number", "Symbol", "decorator", "require"]
 
 semantic Error: tasks/coverage/typescript/tests/cases/conformance/decorators/decoratorMetadata.ts
 Bindings mismatch:

tasks/transform_conformance/snapshots/oxc.snap.md

@@ -1,6 +1,6 @@
 commit: 1d4546bc
 
-Passed: 176/293
+Passed: 178/295
 
 # All Passed:
 * babel-plugin-transform-class-static-block
@@ -494,7 +494,7 @@ after transform: SymbolId(4): ScopeId(1)
 rebuilt        : SymbolId(5): ScopeId(4)
 
 
-# legacy-decorators (4/76)
+# legacy-decorators (6/78)
 * oxc/metadata/abstract-class/input.ts
 Symbol reference IDs mismatch for "Dependency":
 after transform: SymbolId(1): [ReferenceId(1), ReferenceId(2), ReferenceId(3)]

tasks/transform_conformance/tests/legacy-decorators/test/fixtures/oxc/fields-with-declare-modifier/input.ts

@@ -0,0 +1,4 @@
+class DeclareFields {
+	@dec declare name: number;
+	@dec declare output: string;
+}

tasks/transform_conformance/tests/legacy-decorators/test/fixtures/oxc/fields-with-declare-modifier/output.ts

@@ -0,0 +1,4 @@
+class DeclareFields {}
+
+babelHelpers.decorate([dec], DeclareFields.prototype, "name", void 0);
+babelHelpers.decorate([dec], DeclareFields.prototype, "output", void 0);

tasks/transform_conformance/tests/legacy-decorators/test/fixtures/oxc/metadata/fields-with-declare-modifier/input.ts

@@ -0,0 +1,4 @@
+class DeclareFields {
+	@dec declare name: number;
+	@dec declare output: string;
+}

tasks/transform_conformance/tests/legacy-decorators/test/fixtures/oxc/metadata/fields-with-declare-modifier/output.ts

@@ -0,0 +1,15 @@
+class DeclareFields {}
+
+babelHelpers.decorate(
+	[dec, babelHelpers.decorateMetadata("design:type", Number)],
+	DeclareFields.prototype,
+	"name",
+	void 0,
+);
+
+babelHelpers.decorate(
+	[dec, babelHelpers.decorateMetadata("design:type", String)],
+	DeclareFields.prototype,
+	"output",
+	void 0,
+);