fix(transformer): fix TS annotation transform scopes

crates/oxc_transformer/src/lib.rs

@@ -208,9 +208,9 @@ impl<'a> Traverse<'a> for Transformer<'a> {
     fn enter_method_definition(
         &mut self,
         def: &mut MethodDefinition<'a>,
-        _ctx: &mut TraverseCtx<'a>,
+        ctx: &mut TraverseCtx<'a>,
     ) {
-        self.x0_typescript.transform_method_definition(def);
+        self.x0_typescript.transform_method_definition(def, ctx);
     }
 
     fn exit_method_definition(

crates/oxc_transformer/src/typescript/annotations.rs

@@ -5,7 +5,7 @@ use std::rc::Rc;
 use oxc_allocator::Vec;
 use oxc_ast::ast::*;
 use oxc_span::{Atom, GetSpan, SPAN};
-use oxc_syntax::operator::AssignmentOperator;
+use oxc_syntax::{operator::AssignmentOperator, reference::ReferenceFlag};
 use oxc_traverse::TraverseCtx;
 use rustc_hash::FxHashSet;
 
@@ -61,9 +61,18 @@ impl<'a> TypeScriptAnnotations<'a> {
     }
 
     // Creates `this.name = name`
-    fn create_this_property_assignment(&self, id: &BindingIdentifier<'a>) -> Statement<'a> {
+    fn create_this_property_assignment(
+        &self,
+        id: &BindingIdentifier<'a>,
+        ctx: &mut TraverseCtx<'a>,
+    ) -> Statement<'a> {
         let ast = self.ctx.ast;
 
+        let symbol_id = id.symbol_id.get().unwrap();
+        let reference_id =
+            ctx.create_bound_reference(id.name.to_compact_str(), symbol_id, ReferenceFlag::Read);
+        let id = IdentifierReference::new_read(id.span, id.name.clone(), Some(reference_id));
+
         ast.expression_statement(
             SPAN,
             ast.assignment_expression(
@@ -72,10 +81,10 @@ impl<'a> TypeScriptAnnotations<'a> {
                 ast.simple_assignment_target_member_expression(ast.static_member(
                     SPAN,
                     ast.this_expression(SPAN),
-                    ast.identifier_name(id.span, &id.name),
+                    IdentifierName::new(id.span, id.name.clone()),
                     false,
                 )),
-                ast.identifier_reference_expression(ast.identifier_reference(id.span, &id.name)),
+                ast.identifier_reference_expression(id),
             ),
         )
     }
@@ -297,14 +306,18 @@ impl<'a> TypeScriptAnnotations<'a> {
         elem.type_parameters = None;
     }
 
-    pub fn transform_method_definition(&mut self, def: &mut MethodDefinition<'a>) {
+    pub fn transform_method_definition(
+        &mut self,
+        def: &mut MethodDefinition<'a>,
+        ctx: &mut TraverseCtx<'a>,
+    ) {
         // Collects parameter properties so that we can add an assignment
         // for each of them in the constructor body.
         if def.kind == MethodDefinitionKind::Constructor {
             for param in def.value.params.items.as_mut_slice() {
                 if param.is_public() {
                     if let Some(id) = param.pattern.get_binding_identifier() {
-                        let assignment = self.create_this_property_assignment(id);
+                        let assignment = self.create_this_property_assignment(id, ctx);
                         self.assignments.push(assignment);
                     }
                 }

crates/oxc_transformer/src/typescript/mod.rs

@@ -127,8 +127,12 @@ impl<'a> TypeScript<'a> {
         self.annotations.transform_jsx_opening_element(elem);
     }
 
-    pub fn transform_method_definition(&mut self, def: &mut MethodDefinition<'a>) {
-        self.annotations.transform_method_definition(def);
+    pub fn transform_method_definition(
+        &mut self,
+        def: &mut MethodDefinition<'a>,
+        ctx: &mut TraverseCtx<'a>,
+    ) {
+        self.annotations.transform_method_definition(def, ctx);
     }
 
     pub fn transform_method_definition_on_exit(&mut self, def: &mut MethodDefinition<'a>) {