template<class T, class U>
class Extension {
static const std::size_t INVALID_ID = std::numeric_limits<std::size_t>::max();
- std::size_t id_;
+ std::size_t id_ = INVALID_ID;
friend class Extendable<T>;
explicit constexpr Extension(std::size_t id) : id_(id) {}
public:
- explicit constexpr Extension() : id_(INVALID_ID) {}
+ explicit constexpr Extension() {}
std::size_t id() const { return id_; }
bool valid() const { return id_ != INVALID_ID; }
};
void set_data(void* data){
extensions_[0]=data;
}
- void* get_data(){
- return extensions_[0];
- }
+ void* get_data() const { return extensions_[0]; }
// Convenience extension access when the type has a associated 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); }