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AK: Allow customising Trie's underlying map type
This makes it possible to use an ordered map and keep the insertion order intact.
This commit is contained in:
parent
07e4358c63
commit
7a471b7cf5
Notes:
sideshowbarker
2024-07-16 18:06:41 +09:00
Author: https://github.com/alimpfard Commit: https://github.com/SerenityOS/serenity/commit/7a471b7cf5 Pull-request: https://github.com/SerenityOS/serenity/pull/20240 Reviewed-by: https://github.com/awesomekling Reviewed-by: https://github.com/trflynn89
29
AK/Trie.h
29
AK/Trie.h
@ -26,7 +26,7 @@ struct SubstituteIfVoid<void, Default> {
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using Type = Default;
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};
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template<typename DeclaredBaseType, typename DefaultBaseType, typename ValueType, typename MetadataT, typename ValueTraits>
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template<typename DeclaredBaseType, typename DefaultBaseType, typename ValueType, typename MetadataT, typename ValueTraits, template<typename, typename, typename> typename MapType>
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class Trie {
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using BaseType = typename SubstituteIfVoid<DeclaredBaseType, DefaultBaseType>::Type;
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@ -69,6 +69,8 @@ public:
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return const_cast<Trie*>(this)->traverse_until_last_accessible_node(it, end);
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}
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bool has_metadata() const { return m_metadata.has_value(); }
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Optional<MetadataType> metadata() const
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requires(!IsNullPointer<MetadataType>)
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{
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@ -166,16 +168,16 @@ public:
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return insert(it, end);
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}
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HashMap<ValueType, NonnullOwnPtr<Trie>, ValueTraits>& children() { return m_children; }
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HashMap<ValueType, NonnullOwnPtr<Trie>, ValueTraits> const& children() const { return m_children; }
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MapType<ValueType, NonnullOwnPtr<Trie>, ValueTraits>& children() { return m_children; }
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MapType<ValueType, NonnullOwnPtr<Trie>, ValueTraits> const& children() const { return m_children; }
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template<typename Fn>
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ErrorOr<void> for_each_node_in_tree_order(Fn callback) const
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{
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struct State {
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bool did_generate_root { false };
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typename HashMap<ValueType, NonnullOwnPtr<Trie>, ValueTraits>::ConstIteratorType it;
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typename HashMap<ValueType, NonnullOwnPtr<Trie>, ValueTraits>::ConstIteratorType end;
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typename MapType<ValueType, NonnullOwnPtr<Trie>, ValueTraits>::ConstIteratorType it;
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typename MapType<ValueType, NonnullOwnPtr<Trie>, ValueTraits>::ConstIteratorType end;
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};
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Vector<State> state;
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TRY(state.try_empend(false, m_children.begin(), m_children.end()));
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@ -265,20 +267,23 @@ private:
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ValueType m_value;
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Optional<MetadataType> m_metadata;
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HashMap<ValueType, NonnullOwnPtr<Trie>, ValueTraits> m_children;
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MapType<ValueType, NonnullOwnPtr<Trie>, ValueTraits> m_children;
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};
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template<typename BaseType, typename DefaultBaseType, typename ValueType, typename ValueTraits>
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class Trie<BaseType, DefaultBaseType, ValueType, void, ValueTraits> : public Trie<BaseType, DefaultBaseType, ValueType, decltype(nullptr), ValueTraits> {
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using Trie<BaseType, DefaultBaseType, ValueType, decltype(nullptr), ValueTraits>::Trie;
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template<typename BaseType, typename DefaultBaseType, typename ValueType, typename ValueTraits, template<typename, typename, typename> typename MapType>
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class Trie<BaseType, DefaultBaseType, ValueType, void, ValueTraits, MapType> : public Trie<BaseType, DefaultBaseType, ValueType, decltype(nullptr), ValueTraits, MapType> {
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using Trie<BaseType, DefaultBaseType, ValueType, decltype(nullptr), ValueTraits, MapType>::Trie;
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};
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template<typename K, typename V, typename T>
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using HashMapForTrie = HashMap<K, V, T>;
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}
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template<typename ValueType, typename MetadataT = void, typename ValueTraits = Traits<ValueType>, typename BaseT = void>
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class Trie : public Detail::Trie<BaseT, Trie<ValueType, MetadataT, ValueTraits>, ValueType, MetadataT, ValueTraits> {
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template<typename ValueType, typename MetadataT = void, typename ValueTraits = Traits<ValueType>, typename BaseT = void, template<typename, typename, typename> typename MapType = Detail::HashMapForTrie>
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class Trie : public Detail::Trie<BaseT, Trie<ValueType, MetadataT, ValueTraits, void, MapType>, ValueType, MetadataT, ValueTraits, MapType> {
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public:
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using DetailTrie = Detail::Trie<BaseT, Trie<ValueType, MetadataT, ValueTraits>, ValueType, MetadataT, ValueTraits>;
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using DetailTrie = Detail::Trie<BaseT, Trie<ValueType, MetadataT, ValueTraits, void, MapType>, ValueType, MetadataT, ValueTraits, MapType>;
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using MetadataType = typename DetailTrie::MetadataType;
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Trie(ValueType value, MetadataType metadata)
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