@cpp(src="ext-cpp/HelloPackage.cpp",include="HelloPackage.hpp")
package HelloPackage
  extern function my_print(string)

  port type HelloPort_t()

  atom type HelloAtom()
    port HelloPort_t p()
    place START,END
    initial to START
    on p from START to END do {my_print("Hello World\n");}
  end

  compound type HelloCompound()
    component HelloAtom c1()
  end
end