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AK: Add a try_ensure() method to HashMap
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950b36f95d
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sideshowbarker
2024-07-17 18:38:54 +09:00
Author: https://github.com/water-ghosts Commit: https://github.com/SerenityOS/serenity/commit/950b36f95d Pull-request: https://github.com/SerenityOS/serenity/pull/16388 Reviewed-by: https://github.com/ADKaster ✅ Reviewed-by: https://github.com/Zaggy1024 ✅ Reviewed-by: https://github.com/sppmacd
11
AK/HashMap.h
11
AK/HashMap.h
@ -222,6 +222,17 @@ public:
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return find(key)->value;
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}
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template<typename Callback>
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ErrorOr<V> try_ensure(K const& key, Callback initialization_callback)
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{
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auto it = find(key);
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if (it != end())
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return it->value;
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auto result = TRY(try_set(key, initialization_callback()));
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VERIFY(result == HashSetResult::InsertedNewEntry);
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return find(key)->value;
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}
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[[nodiscard]] Vector<K> keys() const
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{
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Vector<K> list;
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