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LibJS: Add basic prototype support

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Object will now traverse up the prototype chain when doing a get().
When a function is called on an object, that object will now also be
the "this" value inside the function. This stuff is probably not very
correct, but we will improve things as we go! :^)
This commit is contained in:
Andreas Kling 2020-03-15 15:01:10 +01:00
parent d02c37f3e3
commit f7c15d00c9
5 changed files with 42 additions and 2 deletions
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6
Libraries/LibJS/Object.h
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@ -45,12 +45,18 @@ public:
virtual bool is_function() const { return false; }
virtual bool is_native_function() const { return false; }
virtual bool is_string_object() const { return false; }
virtual const char* class_name() const override { return "Object"; }
virtual void visit_children(Cell::Visitor&) override;
Object* prototype() { return m_prototype; }
const Object* prototype() const { return m_prototype; }
void set_prototype(Object* prototype) { m_prototype = prototype; }
private:
HashMap<String, Value> m_properties;
Object* m_prototype { nullptr };
};
}