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#ifndef JINJA2CPP_SRC_GENERIC_ADAPTERS_H
#define JINJA2CPP_SRC_GENERIC_ADAPTERS_H
#include <jinja2cpp/value.h>
#include "internal_value.h"
namespace jinja2
{
template<typename ImplType, typename List, typename ValType, typename Base>
class IndexedEnumeratorImpl : public Base
{
public:
using ValueType = ValType;
using ThisType = IndexedEnumeratorImpl<ImplType, List, ValType, Base>;
IndexedEnumeratorImpl(const List* list)
: m_list(list)
, m_maxItems(list->GetSize().value())
{ }
void Reset() override
{
m_curItem = m_invalidIndex;
}
bool MoveNext() override
{
if (m_curItem == m_invalidIndex)
m_curItem = 0;
else
++ m_curItem;
return m_curItem < m_maxItems;
}
bool IsEqual(const IComparable& other) const override
{
auto* val = dynamic_cast<const ThisType*>(&other);
if (!val)
return false;
if (m_list && val->m_list && !m_list->IsEqual(*val->m_list))
return false;
if ((m_list && !val->m_list) || (!m_list && val->m_list))
return false;
if (m_curItem != val->m_curItem)
return false;
if (m_maxItems != val->m_maxItems)
return false;
return true;
}
protected:
constexpr static auto m_invalidIndex = std::numeric_limits<size_t>::max();
const List* m_list{};
size_t m_curItem = m_invalidIndex;
size_t m_maxItems{};
};
template<typename T>
class IndexedListItemAccessorImpl : public IListItemAccessor, public IIndexBasedAccessor
{
public:
using ThisType = IndexedListItemAccessorImpl<T>;
class Enumerator : public IndexedEnumeratorImpl<Enumerator, ThisType, Value, IListEnumerator>
{
public:
using BaseClass = IndexedEnumeratorImpl<Enumerator, ThisType, Value, IListEnumerator>;
#if defined(_MSC_VER)
using IndexedEnumeratorImpl::IndexedEnumeratorImpl;
#else
using BaseClass::BaseClass;
#endif
typename BaseClass::ValueType GetCurrent() const override
{
auto indexer = this->m_list->GetIndexer();
if (!indexer)
return Value();
return indexer->GetItemByIndex(this->m_curItem);
}
ListEnumeratorPtr Clone() const override
{
auto result = MakeEnumerator<Enumerator>(this->m_list);
auto base = static_cast<Enumerator*>(&(*result));
base->m_curItem = this->m_curItem;
return result;
}
ListEnumeratorPtr Move() override
{
auto result = MakeEnumerator<Enumerator>(this->m_list);
auto base = static_cast<Enumerator*>(&(*result));
base->m_curItem = this->m_curItem;
this->m_list = nullptr;
this->m_curItem = this->m_invalidIndex;
this->m_maxItems = 0;
return result;
}
};
Value GetItemByIndex(int64_t idx) const override
{
return IntValue2Value(std::move(static_cast<const T*>(this)->GetItem(idx).value()));
}
std::optional<size_t> GetSize() const override
{
return static_cast<const T*>(this)->GetItemsCountImpl();
}
const IIndexBasedAccessor* GetIndexer() const override
{
return this;
}
ListEnumeratorPtr CreateEnumerator() const override;
bool IsEqual(const IComparable& other) const override
{
auto* val = dynamic_cast<const ThisType*>(&other);
if (!val)
return false;
auto enumerator = CreateEnumerator();
auto otherEnum = val->CreateEnumerator();
if (enumerator && otherEnum && !enumerator->IsEqual(*otherEnum))
return false;
return true;
}
};
template<typename T>
class IndexedListAccessorImpl : public IListAccessor, public IndexedListItemAccessorImpl<T>
{
public:
using ThisType = IndexedListAccessorImpl<T>;
class Enumerator : public IndexedEnumeratorImpl<Enumerator, ThisType, InternalValue, IListAccessorEnumerator>
{
public:
using BaseClass = IndexedEnumeratorImpl<Enumerator, ThisType, InternalValue, IListAccessorEnumerator>;
#if defined(_MSC_VER)
using IndexedEnumeratorImpl::IndexedEnumeratorImpl;
#else
using BaseClass::BaseClass;
#endif
typename BaseClass::ValueType GetCurrent() const override
{
const auto& result = this->m_list->GetItem(this->m_curItem);
if (!result)
return InternalValue();
return result.value();
}
IListAccessorEnumerator* Clone() const override
{
auto result = new Enumerator(this->m_list);
auto base = result;
base->m_curItem = this->m_curItem;
return result;
}
IListAccessorEnumerator* Transfer() override
{
auto result = new Enumerator(std::move(*this));
auto base = result;
base->m_curItem = this->m_curItem;
this->m_list = nullptr;
this->m_curItem = this->m_invalidIndex;
this->m_maxItems = 0;
return result;
}
};
std::optional<size_t> GetSize() const override
{
return static_cast<const T*>(this)->GetItemsCountImpl();
}
ListAccessorEnumeratorPtr CreateListAccessorEnumerator() const override;
};
template<typename T>
class MapItemAccessorImpl : public IMapItemAccessor
{
public:
Value GetValueByName(const std::string& name) const
{
return IntValue2Value(static_cast<const T*>(this)->GetItem(name));
}
};
template<typename T>
class MapAccessorImpl : public IMapAccessor, public MapItemAccessorImpl<T>
{
public:
};
template<typename T>
inline ListAccessorEnumeratorPtr IndexedListAccessorImpl<T>::CreateListAccessorEnumerator() const
{
return ListAccessorEnumeratorPtr(new Enumerator(this));
}
template<typename T>
inline ListEnumeratorPtr IndexedListItemAccessorImpl<T>::CreateEnumerator() const
{
return MakeEnumerator<Enumerator>(this);
}
} // namespace jinja2
#endif // JINJA2CPP_SRC_GENERIC_ADAPTERS_H
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