optional.hpp

Go to the documentation of this file.

 
#ifndef __OPTIONAL_HPP__
#define __OPTIONAL_HPP__
// C++ libraries
#include "stdexcept"
// Code
namespace lib {
template <class T> class optional {
  private:
    T var;
    bool null;
 
  public:
    optional() {
        this->null = true;
    }
    optional(T val) {
        this->var = val;
        this->null = false;
    }
    void set(T val) {
        this->var = val;
        this->null = false;
    }
    void clear() {
        this->null = true;
    }
    T get() {
        if (this->null == false) {
            return this->var;
        } else {
            throw new std::runtime_error("Datatype is null");
        }
    }
    bool is() {
        return !this->null;
    }
};
} // namespace lib
#endif // __OPTIONAL_HPP__