The scope_exit class is an implementation of the identically named C++ library fundamentals TS v3 class, as documented in [1]. It is a simpler version of the libcamera-specific ScopeExitActions class and doesn't require dynamic heap memory allocation, making it more suitable for hot paths. The class is not documented as it implements a C++ standard (even if experimental) API. [1] https://en.cppreference.com/w/cpp/experimental/scope_exit/scope_exit.html Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com> Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>