iobserver.h

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#pragma once
#include "interface.h"
#include <exception>

namespace xtd {
  template<typename type_t>
  class iobserver interface_ {
  public:
    
    virtual void on_completed() noexcept = 0;
    
    virtual void on_error(const std::exception& error) noexcept = 0;
    
    virtual void on_next(const type_t& value) noexcept = 0;
  };
}