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