public:
explicit constexpr Extension() : id_(INVALID_ID) {}
std::size_t id() const { return id_; }
- bool valid() { return id_ != INVALID_ID; }
+ bool valid() const { return id_ != INVALID_ID; }
};
/** An Extendable is an object that you can extend with external elements.
public:
static size_t extension_create(void (*deleter)(void*))
{
- std::size_t res = deleters_.size();
deleters_.push_back(deleter);
- return res;
+ return deleters_.size() - 1;
}
template<class U>
static Extension<T,U> extension_create(void (*deleter)(void*))
return Extension<T, U>(extension_create([](void* p) { delete static_cast<U*>(p); }));
}
Extendable() : extensions_(deleters_.size(), nullptr) {}
+ Extendable(const Extendable&) = delete;
+ Extendable& operator=(const Extendable&) = delete;
~Extendable()
{
/* Call destructors in reverse order of their registrations
}
// Type-unsafe versions of the facet access methods:
- void* extension(std::size_t rank)
+ void* extension(std::size_t rank) const
{
- if (rank >= extensions_.size())
- return nullptr;
- else
- return extensions_.at(rank);
+ return rank < extensions_.size() ? extensions_[rank] : nullptr;
}
void extension_set(std::size_t rank, void* value, bool use_dtor = true)
{
if (rank >= extensions_.size())
extensions_.resize(rank + 1, nullptr);
void* old_value = this->extension(rank);
- extensions_.at(rank) = value;
+ extensions_[rank] = value;
if (use_dtor && old_value != nullptr && deleters_[rank])
deleters_[rank](old_value);
}
// Type safe versions of the facet access methods:
- template<class U>
- U* extension(Extension<T,U> rank)
- {
- return static_cast<U*>(extension(rank.id()));
- }
+ template <class U> U* extension(Extension<T, U> rank) const { return static_cast<U*>(extension(rank.id())); }
template<class U>
void extension_set(Extension<T,U> rank, U* value, bool use_dtor = true)
{
}
// Convenience extension access when the type has a associated EXTENSION ID:
- template<class U> U* extension() { return extension<U>(U::EXTENSION_ID); }
+ template <class U> U* extension() const { return extension<U>(U::EXTENSION_ID); }
template<class U> void extension_set(U* p) { extension_set<U>(U::EXTENSION_ID, p); }
};
-template<class T>
-std::vector<void(*)(void*)> Extendable<T>::deleters_ = {};
-
+template <class T> std::vector<void (*)(void*)> Extendable<T>::deleters_;
}
}