From 1ebf2c311526bfd016172b6ef3fe0b234910f1d9 Mon Sep 17 00:00:00 2001
From: pjh456 <147148383@qq.com>
Date: Fri, 7 Aug 2026 19:39:18 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20String()=20=E5=AF=B9=E8=B1=A1=E5=8F=82?=
 =?UTF-8?q?=E6=95=B0=E8=B5=B0=20ToString=20=E5=AE=8C=E6=95=B4=E8=BD=AC?=
 =?UTF-8?q?=E6=8D=A2=EF=BC=88=E6=95=B0=E7=BB=84=E2=86=92join=20=E7=AD=89?=
 =?UTF-8?q?=EF=BC=89?=
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---
 crates/oxide_builtins/src/string.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/crates/oxide_builtins/src/string.rs b/crates/oxide_builtins/src/string.rs
index 860a401f..b3f6c415 100644
--- a/crates/oxide_builtins/src/string.rs
+++ b/crates/oxide_builtins/src/string.rs
@@ -58,7 +58,11 @@ pub fn string_value_of<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
 /// JS `String()` 构造逻辑：把参数转成字符串；new 语义返回 `[[StringData]]` 包装对象。
 pub fn string_constructor<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
     let s = if args.len() > 1 {
-        oxide_runtime_api::to_string(vm.reg(args[1]))
+        // 对象参数须经 ToPrimitive/ToString 完整转换（数组 → join，对象 → toString）。
+        match oxide_runtime_api::to_string_full(vm.reg(args[1]), vm) {
+            Ok(s) => s,
+            Err(e) => return NativeResult::Err(crate::error::create_error(vm, &e)),
+        }
     } else {
         String::new()
     };