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#pragma once
#include <util/generic/vector.h>
#include <util/generic/hash.h>
#include <functional>
#include <utility>
namespace NOrderedMap {
template <class TKey, class TValue>
class TOrderedMap : protected TVector<std::pair<const TKey, TValue>> {
using TVectorBase = TVector<std::pair<const TKey, TValue>>;
public:
using typename TVectorBase::const_iterator;
using typename TVectorBase::iterator;
using typename TVectorBase::reference;
using typename TVectorBase::value_type;
using TVectorBase::size;
using TVectorBase::empty;
using TVectorBase::front;
using TVectorBase::back;
using TVectorBase::begin;
using TVectorBase::end;
using TVectorBase::operator bool;
TOrderedMap() = default;
TOrderedMap(const TOrderedMap& other) {
for (const auto& item : other) {
emplace_back(item.first, item.second);
}
}
TOrderedMap(TOrderedMap&& other) noexcept : TVectorBase(std::move(other)), Map_(std::move(other.Map_)) {
other.Map_.clear();
}
TOrderedMap& operator=(const TOrderedMap& other) {
if (this != &other) {
clear();
for (const auto& item : other) {
emplace_back(item.first, item.second);
}
}
return *this;
}
TOrderedMap& operator=(TOrderedMap&& other) noexcept {
if (this != &other) {
TVectorBase::operator=(std::move(other));
Map_ = std::move(other.Map_);
other.Map_.clear();
}
return *this;
}
template <class TheKey>
TValue& operator[](const TheKey& key) {
auto [mapIt, inserted] = Map_.try_emplace(key, TVectorBase::size());
if (inserted) {
TVectorBase::emplace_back(key, TValue{});
}
return TVectorBase::at(mapIt->second).second;
}
template <class TheKey>
const TValue& at(const TheKey& key) const {
return TVectorBase::at(Map_.at(key)).second;
}
template <class TheKey>
TValue& at(const TheKey& key) {
return TVectorBase::at(Map_.at(key)).second;
}
template <class TheKey>
const_iterator find(const TheKey& key) const {
auto mapIt = Map_.find(key);
if (mapIt == Map_.end()) {
return end();
} else {
return begin() + mapIt->second;
}
}
template <class TheKey>
iterator find(const TheKey& key) {
auto mapIt = Map_.find(key);
if (mapIt == Map_.end()) {
return end();
} else {
return begin() + mapIt->second;
}
}
template <class TheKey>
bool contains(const TheKey& key) const {
return Map_.contains(key);
}
void push_back(const value_type& x) {
emplace_back(x);
}
void push_back(value_type&& x) {
emplace_back(std::move(x));
}
template <class... TArgs>
reference emplace_back(TArgs&&... args) {
auto pos = size();
auto& value = TVectorBase::emplace_back(std::forward<TArgs>(args)...);
auto [mapIt, ok] = Map_.try_emplace(value.first, pos);
if (ok) {
return value;
}
TVectorBase::pop_back();
return TVectorBase::at(mapIt->second);
}
template <class TheKey>
size_t erase(const TheKey& key) {
auto it = find(key);
if (it == end()) {
return 0;
}
erase(it);
return 1;
}
void erase(iterator it) {
if (it == end()) {
return;
}
Map_.clear();
TVector<std::pair<const TKey, TValue>> tmp;
for (auto iter = begin(); iter != end(); ++iter) {
if (iter != it) {
Map_[iter->first] = tmp.size();
tmp.emplace_back(std::move(*iter));
}
}
TVectorBase::operator=(std::move(tmp));
}
void Sort() {
TVector<std::pair<TKey, TValue>> tmp(begin(), end());
TVectorBase::clear();
std::ranges::sort(tmp, {}, &std::pair<TKey, TValue>::first);
for (auto&& [k, v] : std::move(tmp)) {
Map_[k] = size();
TVectorBase::emplace_back(std::move(k), std::move(v));
}
}
template <class TheKey>
const TValue* FindPtr(const TheKey& key) const {
auto mapIt = Map_.find(key);
return mapIt != Map_.end()
? &TVectorBase::at(mapIt->second).second
: nullptr;
}
template <class TheKey>
TValue* FindPtr(const TheKey& key) {
auto mapIt = Map_.find(key);
return mapIt != Map_.end()
? &TVectorBase::at(mapIt->second).second
: nullptr;
}
void clear() noexcept {
TVectorBase::clear();
Map_.clear();
}
private:
THashMap<TKey, size_t> Map_{};
};
}
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