serde/test_suite/tests/expand/ser_enum.rs

use serde::Serialize;

#[derive(Serialize)]
enum SerEnum<'a, B: 'a, C: 'a, D>
where
    D: 'a,
{
    Unit,
    Seq(i8, B, &'a C, &'a mut D),
    Map { a: i8, b: B, c: &'a C, d: &'a mut D },

    // Make sure we can support more than one variant.
    _Unit2,
    _Seq2(i8, B, &'a C, &'a mut D),
    _Map2 { a: i8, b: B, c: &'a C, d: &'a mut D },
}