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LibJS: Enable storing Value and Handle<Value> in HashMaps
We have the right conversions to make this work, so let's make it possible to have a `HashMap<JS::Handle<T>, V>` and look for a specific T inside it without having to create a temporary handle. This involves adding some operator== implementations, and some specializations of AK::Traits.
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2 changed files with 42 additions and 0 deletions
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@ -162,6 +162,9 @@ public:
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auto value() const { return *m_value; }
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bool is_null() const { return m_handle.is_null() && !m_value.has_value(); }
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bool operator==(Value const& value) const { return value == m_value; }
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bool operator==(Handle<Value> const& other) const { return other.m_value == this->m_value; }
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private:
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explicit Handle(Value value)
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: m_value(value)
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@ -184,3 +187,25 @@ inline Handle<Value> make_handle(Value value)
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}
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}
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namespace AK {
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template<typename T>
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struct Traits<JS::Handle<T>> : public GenericTraits<JS::Handle<T>> {
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static unsigned hash(JS::Handle<T> const& handle) { return Traits<T>::hash(handle); }
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};
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template<>
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struct Traits<JS::Handle<JS::Value>> : public GenericTraits<JS::Handle<JS::Value>> {
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static unsigned hash(JS::Handle<JS::Value> const& handle) { return Traits<JS::Value>::hash(handle.value()); }
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};
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namespace Detail {
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template<typename T>
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inline constexpr bool IsHashCompatible<JS::Handle<T>, T> = true;
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template<typename T>
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inline constexpr bool IsHashCompatible<T, JS::Handle<T>> = true;
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}
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}
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