LibJS: Add Object::has_property()

Like Object::has_own_property() but going down the prototype chain.
abyesilyurt · May 1, 2020 · 62671be · 62671be
1 parent 4cdd802
commit 62671be
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diff --git a/Libraries/LibJS/Runtime/Object.cpp b/Libraries/LibJS/Runtime/Object.cpp
@@ -381,6 +381,17 @@ void Object::visit_children(Cell::Visitor& visitor)
  visitor.visit(value);
 }
 
+bool Object::has_property(const FlyString& property_name) const
+{
+ const Object* object = this;
+ while (object) {
+ if (object->has_own_property(property_name))
+ return true;
+ object = object->prototype();
+ }
+ return false;
+}
+
 bool Object::has_own_property(const FlyString& property_name) const
 {
  bool ok;

diff --git a/Libraries/LibJS/Runtime/Object.h b/Libraries/LibJS/Runtime/Object.h
@@ -96,7 +96,9 @@ class Object : public Cell {
  void set_prototype(Object*);
  bool has_prototype(const Object* prototype) const;
 
+ bool has_property(const FlyString& property_name) const;
  bool has_own_property(const FlyString& property_name) const;
+
  enum class PreferredType {
  Default,
  String,