test on impl

lib.mir.rs

// WARNING: This output format is intended for human consumers only
// and is subject to change without notice. Knock yourself out.
fn <impl at src/lib.rs:5:1: 9:2>::from(_1: i16) -> Koko {
    let mut _0: Koko;                    // return place
    let mut _2: i16;

    bb0: {                              
        StorageLive(_2);                 // bb0[0]: scope 0 at src/lib.rs:7:23: 7:28
        _2 = _1;                         // bb0[1]: scope 0 at src/lib.rs:7:23: 7:28
        _0 = Koko { field: move _2 };    // bb0[2]: scope 0 at src/lib.rs:7:9: 7:30
        StorageDead(_2);                 // bb0[3]: scope 0 at src/lib.rs:7:30: 7:30
        return;                          // bb0[4]: scope 0 at src/lib.rs:8:6: 8:6
    }
}

lib.rs

pub struct Koko {
    field: i16
}

impl From<i16> for Koko {
    fn from(value: i16) -> Self {
        Koko { field: value }
    }
}