class.cpp

Class :: Class(){
  chai.add(chaiscript::fun(&Class::func, this), "func");
  // ...
  
  initial_state = chai.get_state();
}
 
void Class :: exec(){
  chai.set_state(initial_state);
  
  chai.exec("var a = 2; print(2*2);");
} 

class.hpp

class Class {
protected:
  chaiscript::ChaiScript chai;
  chaiscript::ChaiScript::State initial_state
  
  void func();
public:
  Class();
  void exec();
}