17 struct Never(PhantomPinned);  struct
30         inner: Never,  in cfg()
44         n: Never,  in cfg()
58         Never,  in cfg()
76         Inner(#[pin] Never),  in cfg()
81         N(#[pin] Never),  in cfg()
101             inner: Never,  in cfg()
109             n: Never,  in cfg()
117             Never,  in cfg()
137         inner: Never,  in cfg_attr()
153         inner: Never,  in cfg_attr()
178     // Since `cfg(any())` can never be true, it is okay for this to pass.  in cfg_attr_any_packed()