refactor: 统一调用调度并安全化 IC 缓存

crates/oxide_vm/src/native.rs

@@ -1,5 +1,46 @@
 use oxide_types::value::JsValue;
 
-pub type NativeResult = Result<JsValue, JsValue>;
+pub enum NativeResult {
+    Ok(JsValue),
+    Err(JsValue),
+    TailCall { callee: JsValue, this: JsValue, args: Vec<JsValue> },
+}
+
+impl NativeResult {
+    pub fn ok(val: JsValue) -> Self {
+        Self::Ok(val)
+    }
+
+    pub fn err(val: JsValue) -> Self {
+        Self::Err(val)
+    }
+
+    pub fn into_result(self) -> Result<JsValue, JsValue> {
+        match self {
+            Self::Ok(val) => Ok(val),
+            Self::Err(err) => Err(err),
+            Self::TailCall { .. } => panic!("TailCall cannot be converted to Result"),
+        }
+    }
+
+    pub fn unwrap(self) -> JsValue {
+        match self {
+            Self::Ok(val) => val,
+            Self::Err(_) => panic!("called `NativeResult::unwrap()` on an `Err` value"),
+            Self::TailCall { .. } => panic!("called `NativeResult::unwrap()` on a `TailCall` value"),
+        }
+    }
+
+    pub fn map_err<E, F>(self, op: F) -> Result<JsValue, E>
+    where
+        F: FnOnce(JsValue) -> E,
+    {
+        match self {
+            Self::Ok(val) => Ok(val),
+            Self::Err(err) => Err(op(err)),
+            Self::TailCall { .. } => panic!("TailCall cannot be converted to Result"),
+        }
+    }
+}
 
 pub type NativeFn = fn(&mut crate::vm::Vm, args: &[u8]) -> NativeResult;