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#![allow(unused_variables)]
#![allow(non_camel_case_types)]
#![deny(dead_code)]
struct Foo {
x: usize,
b: bool, //~ ERROR: field `b` is never read
}
fn field_read(f: Foo) -> usize {
f.x.pow(2)
}
enum XYZ {
X, //~ ERROR variants `X` and `Y` are never constructed
Y {
a: String,
b: i32,
c: i32,
},
Z
}
enum ABC { //~ ERROR enum `ABC` is never used
A,
B {
a: String,
b: i32,
c: i32,
},
C
}
// ensure struct variants get warning for their fields
enum IJK {
I, //~ ERROR variants `I` and `K` are never constructed
J {
a: String,
b: i32, //~ ERROR fields `b` and `c` are never read
c: i32,
},
K
}
fn struct_variant_partial_use(b: IJK) -> String {
match b {
IJK::J { a, b: _, .. } => a,
_ => "".to_string()
}
}
fn field_match_in_patterns(b: XYZ) -> String {
match b {
XYZ::Y { a, b: _, .. } => a,
_ => "".to_string()
}
}
struct Bar {
x: usize, //~ ERROR: fields `x` and `c` are never read
b: bool,
c: bool,
_guard: ()
}
#[repr(C)]
struct Baz {
x: u32,
}
fn field_match_in_let(f: Bar) -> bool {
let Bar { b, c: _, .. } = f;
b
}
fn main() {
field_read(Foo { x: 1, b: false });
field_match_in_patterns(XYZ::Z);
struct_variant_partial_use(IJK::J { a: "".into(), b: 1, c: -1 });
field_match_in_let(Bar { x: 42, b: true, c: false, _guard: () });
let _ = Baz { x: 0 };
}
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