Implement isModuleNamespaceObject

Signed-off-by: Seonghyun Kim <sh8281.kim@samsung.com>

src/api/EscargotPublic.cpp

@@ -2324,6 +2324,11 @@ bool ValueRef::isTypedArrayPrototypeObject()
     return toImpl(this).isPointerValue() && toImpl(this).asPointerValue()->isTypedArrayPrototypeObject();
 }
 
+bool ValueRef::isModuleNamespaceObject()
+{
+    return toImpl(this).isPointerValue() && toImpl(this).asPointerValue()->isModuleNamespaceObject();
+}
+
 bool ValueRef::asBoolean()
 {
     return toImpl(this).asBoolean();

src/api/EscargotPublic.h

@@ -733,6 +733,7 @@ public:
     bool isSetIteratorObject();
     bool isTypedArrayObject();
     bool isTypedArrayPrototypeObject();
+    bool isModuleNamespaceObject();
 
     bool asBoolean();
     double asNumber();

src/runtime/ModuleNamespaceObject.h

@@ -31,6 +31,11 @@ class ModuleNamespaceObject : public Object {
 public:
     ModuleNamespaceObject(ExecutionState& state, Script* script);
 
+    virtual bool isModuleNamespaceObject() const override
+    {
+        return true;
+    }
+
     virtual bool isInlineCacheable() override
     {
         return false;

src/runtime/PointerValue.h

@@ -68,6 +68,7 @@ class AsyncGeneratorObject;
 class AsyncFromSyncIteratorObject;
 class GlobalObjectProxyObject;
 class TypedArrayObject;
+class ModuleNamespaceObject;
 #if defined(ENABLE_THREADING)
 class SharedArrayBufferObject;
 #endif
@@ -399,6 +400,11 @@ public:
         return false;
     }
 
+    virtual bool isModuleNamespaceObject() const
+    {
+        return false;
+    }
+
     virtual bool isArgumentsObject() const
     {
         return false;