Comment by lyricaljoke

Or, arguably, the C++ equivalent is just the destructor. 'Defer' and 'ScopeExit' are interesting, but I'm not sure if I see the advantage over widely understood first-class language features. If you don't want to write a class just to get cleanup logic at scope exit, consider using std::unique_ptr with a custom deleter -- this construct is for managing resources in a general sense, not necessarily just memory allocation.