From 739ed7cd440f0350690d36c87a41205b6efc6d5c Mon Sep 17 00:00:00 2001
From: camc314 <18101008+camc314@users.noreply.github.com>
Date: Sun, 28 Dec 2025 14:03:57 +0000
Subject: [PATCH] perf(semantic): inline `enter_kind` for `TSTypeParameter`
 (#17419)

Ref https://github.com/oxc-project/backlog/issues/72
---
 crates/oxc_semantic/src/builder.rs | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/crates/oxc_semantic/src/builder.rs b/crates/oxc_semantic/src/builder.rs
index bc65ce971a8e5..359a25977a03d 100644
--- a/crates/oxc_semantic/src/builder.rs
+++ b/crates/oxc_semantic/src/builder.rs
@@ -2301,6 +2301,21 @@ impl<'a> Visit<'a> for SemanticBuilder<'a> {
         }
         self.leave_node(kind);
     }
+
+    fn visit_ts_type_parameter(&mut self, param: &TSTypeParameter<'a>) {
+        let kind = AstKind::TSTypeParameter(self.alloc(param));
+        self.enter_node(kind);
+        param.bind(self);
+        self.visit_span(&param.span);
+        self.visit_binding_identifier(&param.name);
+        if let Some(constraint) = &param.constraint {
+            self.visit_ts_type(constraint);
+        }
+        if let Some(default) = &param.default {
+            self.visit_ts_type(default);
+        }
+        self.leave_node(kind);
+    }
 }
 
 impl<'a> SemanticBuilder<'a> {
@@ -2322,9 +2337,6 @@ impl<'a> SemanticBuilder<'a> {
         /* cfg */
 
         match kind {
-            AstKind::TSTypeParameter(type_parameter) => {
-                type_parameter.bind(self);
-            }
             AstKind::TSPropertySignature(signature) => {
                 if signature.key.is_expression() {
                     // interface A { [prop]: string }