#![feature(offset_of)] use std::mem::offset_of; enum Alpha { One(u8), Two(u8), } fn main() { offset_of!(Alpha::One, 0); //~ ERROR expected type, found variant `Alpha::One` offset_of!(Alpha, One); //~ ERROR `One` is an enum variant; expected field at end of `offset_of` //~| ERROR using enums in offset_of is experimental offset_of!(Alpha, Two.0); //~ ERROR using enums in offset_of is experimental }