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LibJS: Add a bunch of fast_is<T> helpers for commonly checked types

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Based on what was hitting dynamic_cast<T> on Speedometer.
This commit is contained in:
Andreas Kling 2025-04-18 10:17:45 +02:00 • committed by Andreas Kling
commit 84626c7db2
Notes: github-actions[bot] 2025-04-18 12:48:02 +00:00
4 changed files with 41 additions and 1 deletions
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4
Libraries/LibJS/Runtime/Promise.h
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@ -54,6 +54,7 @@ protected:
virtual void visit_edges(Visitor&) override;
private:
virtual bool is_promise() const override { return true; }
bool is_settled() const { return m_state == State::Fulfilled || m_state == State::Rejected; }
void trigger_reactions() const;
@ -66,4 +67,7 @@ private:
bool m_is_handled { false }; // [[PromiseIsHandled]]
};
template<>
inline bool Object::fast_is<Promise>() const { return is_promise(); }
}