#![feature(offset_of_enum)] 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` offset_of!(Alpha, Two.0); offset_of!(Alpha, Two.1); //~ ERROR no field named `1` on enum variant `Alpha::Two` offset_of!(Alpha, Two.foo); //~ ERROR no field named `foo` on enum variant `Alpha::Two` offset_of!(Alpha, NonExistent); //~ ERROR no variant named `NonExistent` found for enum `Alpha` offset_of!(Beta, One); //~ ERROR cannot find type `Beta` in this scope }