feat(transformer): class properties transform

crates/oxc_transformer/src/common/helper_loader.rs

@@ -143,6 +143,7 @@ pub enum Helper {
     AsyncToGenerator,
     ObjectSpread2,
     WrapAsyncGenerator,
+    DefineProperty,
 }
 
 impl Helper {
@@ -154,6 +155,7 @@ impl Helper {
             Self::AsyncToGenerator => "asyncToGenerator",
             Self::ObjectSpread2 => "objectSpread2",
             Self::WrapAsyncGenerator => "wrapAsyncGenerator",
+            Self::DefineProperty => "defineProperty",
         }
     }
 }

crates/oxc_transformer/src/common/statement_injector.rs

@@ -79,7 +79,6 @@ impl<'a> StatementInjectorStore<'a> {
 // The non-trivial inner functions are not marked `#[inline]` - compiler can decide whether to inline or not.
 impl<'a> StatementInjectorStore<'a> {
     /// Add a statement to be inserted immediately before the target statement.
-    #[expect(dead_code)]
     #[inline]
     pub fn insert_before<A: GetAddress>(&self, target: &A, stmt: Statement<'a>) {
         self.insert_before_address(target.address(), stmt);

crates/oxc_transformer/src/common/var_declarations.rs

@@ -98,7 +98,6 @@ impl<'a> VarDeclarationsStore<'a> {
 
     /// Add a `let` declaration to be inserted at top of current enclosing statement block,
     /// given a `BoundIdentifier`.
-    #[expect(dead_code)]
     pub fn insert_let(
         &self,
         binding: &BoundIdentifier<'a>,

crates/oxc_transformer/src/compiler_assumptions.rs

@@ -85,7 +85,6 @@ pub struct CompilerAssumptions {
     pub set_computed_properties: bool,
 
     #[serde(default)]
-    #[deprecated = "Not Implemented"]
     pub set_public_class_fields: bool,
 
     #[serde(default)]