27 class ScopeGuard {
29   ScopeGuard(F&& f) : f_(std::forward<F>(f)), active_(true) {}  in ScopeGuard()  function
31   ScopeGuard(ScopeGuard&& that) noexcept : f_(std::move(that.f_)), active_(that.active_) {  in ScopeGuard()  function
36   ScopeGuard(ScopeGuard<Functor>&& that) : f_(std::move(that.f_)), active_(that.active_) {  in ScopeGuard()  function
40   ~ScopeGuard() {  in ~ScopeGuard()
44   ScopeGuard() = delete;
45   ScopeGuard(const ScopeGuard&) = delete;
46   void operator=(const ScopeGuard&) = delete;
47   void operator=(ScopeGuard&& that) = delete;
55   friend class ScopeGuard;
62 ScopeGuard<F> make_scope_guard(F&& f) {  in make_scope_guard()
63   return ScopeGuard<F>(std::forward<F>(f));  in make_scope_guard()