has_auto_id.h

#pragma once
 
#include <cstdint>
 
namespace smlt {
 
template<typename T> //< Simply for namespacing IDs
class HasAutoID {
private:
    static uint64_t counter;
 
    uint64_t auto_id_;
 
public:
    HasAutoID():
        auto_id_(++counter) {
    }
 
    virtual ~HasAutoID() {}
 
    uint64_t auto_id() const { return auto_id_; }
};
 
template<typename T>
uint64_t HasAutoID<T>::counter = 0;
 
}