rust/src/test/run-pass/rfcs/rfc-2008-non-exhaustive/enums_same_crate.rs

// run-pass
#![feature(non_exhaustive)]

#[non_exhaustive]
pub enum NonExhaustiveEnum {
    Unit,
    Tuple(u32),
    Struct { field: u32 }
}

fn main() {
    let enum_unit = NonExhaustiveEnum::Unit;

    match enum_unit {
        NonExhaustiveEnum::Unit => "first",
        NonExhaustiveEnum::Tuple(_) => "second",
        NonExhaustiveEnum::Struct { .. } => "third",
    };
}