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Optimizing view iterators

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This commit is contained in:
Zoe Roux
2021-06-05 19:55:38 +02:00
parent f3ce14caca
commit 1b4e8d2151
3 changed files with 14 additions and 12 deletions
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lib/wal/sources/View/View.hpp
+9 -5
View File
@@ -19,9 +19,9 @@ namespace WAL
class ViewEntity
{
private:
std::tuple<std::reference_wrapper<Entity>, std::reference_wrapper<Components>...> _value;
std::tuple<std::reference_wrapper<Entity>, std::reference_wrapper<Components>...> &_value;
public:
explicit ViewEntity(std::tuple<std::reference_wrapper<Entity>, std::reference_wrapper<Components>...> value)
explicit ViewEntity(std::tuple<std::reference_wrapper<Entity>, std::reference_wrapper<Components>...> &value)
: _value(value)
{}
@@ -63,19 +63,22 @@ namespace WAL
public:
ViewEntity<Components...> &operator*()
{
this->_entity.emplace(*this->_it);
return this->_entity.value();
if (!this->_entity)
this->_entity.emplace(*this->_it);
return *this->_entity;
}
ViewEntity<Components...> *operator->()
{
this->_entity.emplace(*this->_it);
if (!this->_entity)
this->_entity =(*this->_it);
return &this->_entity;
}
ViewIterator &operator++()
{
this->_it++;
this->_entity = std::nullopt;
return *this;
}
@@ -83,6 +86,7 @@ namespace WAL
{
ViewIterator copy = *this;
this->_it++;
this->_entity = std::nullopt;
return *this;
}