smallfun.cpp

template<class ReturnType, class...Xs>
class SmallFun<ReturnType(Xs...)> {

  char memory[SIZE];
  
public:
  template<class F>
  SmallFun(F const& f) 
    : new (memory) Model<F, ReturnType, Xs...> {
    assert( sizeof(Model<F, ReturnType, Xs...>) < SIZE ); 
  }
 
  ~SmallFun() {
    if (allocated) {
      ((concept*)memory)->~concept();
    }
  } 
};