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AK: Stop allowing implicit downcast with RefPtr and NonnullRefPtr

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We were allowing this dangerous kind of thing:

RefPtr<Base> base;
RefPtr<Derived> derived = base;

This patch changes the {Nonnull,}RefPtr constructors so this is no
longer possible.

To downcast one of these pointers, there is now static_ptr_cast<T>:

RefPtr<Derived> derived = static_ptr_cast<Derived>(base);

Fixing this exposed a ton of cowboy-downcasts in various places,
which we're now forced to fix. :^)
This commit is contained in:
Andreas Kling
2020-04-05 11:11:07 +02:00
parent 058c614110
commit 1d468ed6d3
11 changed files with 68 additions and 54 deletions
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6
Libraries/LibJS/Runtime/ScriptFunction.h
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@@ -32,10 +32,10 @@ namespace JS {
class ScriptFunction final : public Function {
public:
ScriptFunction(const ScopeNode& body, Vector<FlyString> parameters = {});
ScriptFunction(const Statement& body, Vector<FlyString> parameters = {});
virtual ~ScriptFunction();
const ScopeNode& body() const { return m_body; }
const Statement& body() const { return m_body; }
const Vector<FlyString>& parameters() const { return m_parameters; };
virtual Value call(Interpreter&) override;
@@ -48,7 +48,7 @@ private:
static Value length_getter(Interpreter&);
static void length_setter(Interpreter&, Value);
NonnullRefPtr<ScopeNode> m_body;
NonnullRefPtr<Statement> m_body;
const Vector<FlyString> m_parameters;
};