76 lines
1.6 KiB
Rust
76 lines
1.6 KiB
Rust
#![warn(clippy::temporary_assignment)]
|
|
|
|
use std::ops::{Deref, DerefMut};
|
|
|
|
struct TupleStruct(i32);
|
|
|
|
struct Struct {
|
|
field: i32,
|
|
}
|
|
|
|
struct MultiStruct {
|
|
structure: Struct,
|
|
}
|
|
|
|
struct Wrapper<'a> {
|
|
inner: &'a mut Struct,
|
|
}
|
|
|
|
impl<'a> Deref for Wrapper<'a> {
|
|
type Target = Struct;
|
|
fn deref(&self) -> &Struct {
|
|
self.inner
|
|
}
|
|
}
|
|
|
|
impl<'a> DerefMut for Wrapper<'a> {
|
|
fn deref_mut(&mut self) -> &mut Struct {
|
|
self.inner
|
|
}
|
|
}
|
|
|
|
struct ArrayStruct {
|
|
array: [i32; 1],
|
|
}
|
|
|
|
const A: TupleStruct = TupleStruct(1);
|
|
const B: Struct = Struct { field: 1 };
|
|
const C: MultiStruct = MultiStruct {
|
|
structure: Struct { field: 1 },
|
|
};
|
|
const D: ArrayStruct = ArrayStruct { array: [1] };
|
|
|
|
fn main() {
|
|
let mut s = Struct { field: 0 };
|
|
let mut t = (0, 0);
|
|
|
|
Struct { field: 0 }.field = 1;
|
|
//~^ ERROR: assignment to temporary
|
|
//~| NOTE: `-D clippy::temporary-assignment` implied by `-D warnings`
|
|
MultiStruct {
|
|
//~^ ERROR: assignment to temporary
|
|
structure: Struct { field: 0 },
|
|
}
|
|
.structure
|
|
.field = 1;
|
|
ArrayStruct { array: [0] }.array[0] = 1;
|
|
//~^ ERROR: assignment to temporary
|
|
(0, 0).0 = 1;
|
|
//~^ ERROR: assignment to temporary
|
|
|
|
// no error
|
|
s.field = 1;
|
|
t.0 = 1;
|
|
Wrapper { inner: &mut s }.field = 1;
|
|
let mut a_mut = TupleStruct(1);
|
|
a_mut.0 = 2;
|
|
let mut b_mut = Struct { field: 1 };
|
|
b_mut.field = 2;
|
|
let mut c_mut = MultiStruct {
|
|
structure: Struct { field: 1 },
|
|
};
|
|
c_mut.structure.field = 2;
|
|
let mut d_mut = ArrayStruct { array: [1] };
|
|
d_mut.array[0] = 2;
|
|
}
|