finally.h

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#pragma once
#include <functional>
 
namespace hgps {
 
template <typename F> class Finally {
  public:
    template <typename Func> Finally(Func &&func) : functor_(std::forward<Func>(func)) {}
 
    Finally(const Finally &) = delete;
    Finally(Finally &&) = delete;
    Finally &operator=(const Finally &) = delete;
    Finally &operator=(Finally &&) = delete;
 
    ~Finally() {
        try {
            functor_();
        } catch (...) {
        }
    }
 
  private:
    F functor_;
};
 
template <typename F> Finally<F> make_finally(F &&f) { return {std::forward<F>(f)}; }
} // namespace hgps