[persistent-data] persistent-data/data-structures/btree_key_value_extractor.h doesn't appear to be used
So remove
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#ifndef PERSISTENT_DATA_DATA_STRUCTURES_BTREE_KEY_VALUE_EXTRACTOR_H
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#define PERSISTENT_DATA_DATA_STRUCTURES_BTREE_KEY_VALUE_EXTRACTOR_H
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#include "persistent-data/data-structures/btree_damage_visitor.h"
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#include <map>
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namespace persistent_data {
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namespace btree_detail {
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template <typename ValueType>
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class key_value_extractor {
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typedef typename std::map<uint64_t, ValueType> MapType;
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public:
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key_value_extractor(MapType &map): map_(map) {
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}
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virtual ~key_value_extractor() {
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}
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virtual void visit(btree_path const &path, ValueType const &v) {
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map_.insert(std::make_pair(path.back(), v));
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}
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private:
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MapType &map_;
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};
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template <unsigned Levels, typename ValueTraits>
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void btree_extract_key_values(btree<Levels, ValueTraits> const &tree,
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std::map<uint64_t, typename ValueTraits::value_type> &map) {
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typedef key_value_extractor<typename ValueTraits::value_type> KeyValueExtractor;
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KeyValueExtractor kve(map);
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noop_damage_visitor noop_dv;
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btree_detail::btree_damage_visitor<KeyValueExtractor, noop_damage_visitor, Levels, ValueTraits>
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v(kve, noop_dv);
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tree.visit_depth_first(v);
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}
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}
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}
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#endif
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