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#![deny(unused_tuple_struct_fields)]
//~^ NOTE: the lint level is defined here
use std::marker::PhantomData;
const LEN: usize = 4;
struct SingleUnused(i32, [u8; LEN], String);
//~^ ERROR: field `1` is never read
//~| NOTE: field in this struct
//~| HELP: consider changing the field to be of unit type
struct MultipleUnused(i32, f32, String, u8);
//~^ ERROR: fields `0`, `1`, `2`, and `3` are never read
//~| NOTE: fields in this struct
//~| HELP: consider changing the fields to be of unit type
struct GoodUnit(());
struct GoodPhantom(PhantomData<i32>);
struct Void;
struct GoodVoid(Void);
fn main() {
let w = SingleUnused(42, [0, 1, 2, 3], "abc".to_string());
let _ = w.0;
let _ = w.2;
let m = MultipleUnused(42, 3.14, "def".to_string(), 4u8);
let gu = GoodUnit(());
let gp = GoodPhantom(PhantomData);
let gv = GoodVoid(Void);
let _ = (gu, gp, gv, m);
}
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