mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-12-05 02:50:32 +00:00
85 lines
3 KiB
Rust
85 lines
3 KiB
Rust
#![warn(clippy::borrow_interior_mutable_const)]
|
|
#![allow(clippy::declare_interior_mutable_const, clippy::ref_in_deref)]
|
|
|
|
use std::borrow::Cow;
|
|
use std::cell::Cell;
|
|
use std::fmt::Display;
|
|
use std::sync::atomic::{AtomicUsize, Ordering};
|
|
use std::sync::Once;
|
|
|
|
const ATOMIC: AtomicUsize = AtomicUsize::new(5);
|
|
const CELL: Cell<usize> = Cell::new(6);
|
|
const ATOMIC_TUPLE: ([AtomicUsize; 1], Vec<AtomicUsize>, u8) = ([ATOMIC], Vec::new(), 7);
|
|
const INTEGER: u8 = 8;
|
|
const STRING: String = String::new();
|
|
const STR: &str = "012345";
|
|
const COW: Cow<str> = Cow::Borrowed("abcdef");
|
|
const NO_ANN: &dyn Display = &70;
|
|
static STATIC_TUPLE: (AtomicUsize, String) = (ATOMIC, STRING);
|
|
const ONCE_INIT: Once = Once::new();
|
|
|
|
trait Trait<T>: Copy {
|
|
type NonCopyType;
|
|
|
|
const ATOMIC: AtomicUsize;
|
|
}
|
|
|
|
impl Trait<u32> for u64 {
|
|
type NonCopyType = u16;
|
|
|
|
const ATOMIC: AtomicUsize = AtomicUsize::new(9);
|
|
}
|
|
|
|
fn main() {
|
|
ATOMIC.store(1, Ordering::SeqCst); //~ ERROR interior mutability
|
|
assert_eq!(ATOMIC.load(Ordering::SeqCst), 5); //~ ERROR interior mutability
|
|
|
|
let _once = ONCE_INIT;
|
|
let _once_ref = &ONCE_INIT; //~ ERROR interior mutability
|
|
let _once_ref_2 = &&ONCE_INIT; //~ ERROR interior mutability
|
|
let _once_ref_4 = &&&&ONCE_INIT; //~ ERROR interior mutability
|
|
let _once_mut = &mut ONCE_INIT; //~ ERROR interior mutability
|
|
let _atomic_into_inner = ATOMIC.into_inner();
|
|
// these should be all fine.
|
|
let _twice = (ONCE_INIT, ONCE_INIT);
|
|
let _ref_twice = &(ONCE_INIT, ONCE_INIT);
|
|
let _ref_once = &(ONCE_INIT, ONCE_INIT).0;
|
|
let _array_twice = [ONCE_INIT, ONCE_INIT];
|
|
let _ref_array_twice = &[ONCE_INIT, ONCE_INIT];
|
|
let _ref_array_once = &[ONCE_INIT, ONCE_INIT][0];
|
|
|
|
// referencing projection is still bad.
|
|
let _ = &ATOMIC_TUPLE; //~ ERROR interior mutability
|
|
let _ = &ATOMIC_TUPLE.0; //~ ERROR interior mutability
|
|
let _ = &(&&&&ATOMIC_TUPLE).0; //~ ERROR interior mutability
|
|
let _ = &ATOMIC_TUPLE.0[0]; //~ ERROR interior mutability
|
|
let _ = ATOMIC_TUPLE.0[0].load(Ordering::SeqCst); //~ ERROR interior mutability
|
|
let _ = &*ATOMIC_TUPLE.1; //~ ERROR interior mutability
|
|
let _ = &ATOMIC_TUPLE.2;
|
|
let _ = (&&&&ATOMIC_TUPLE).0;
|
|
let _ = (&&&&ATOMIC_TUPLE).2;
|
|
let _ = ATOMIC_TUPLE.0;
|
|
let _ = ATOMIC_TUPLE.0[0]; //~ ERROR interior mutability
|
|
let _ = ATOMIC_TUPLE.1.into_iter();
|
|
let _ = ATOMIC_TUPLE.2;
|
|
let _ = &{ ATOMIC_TUPLE };
|
|
|
|
CELL.set(2); //~ ERROR interior mutability
|
|
assert_eq!(CELL.get(), 6); //~ ERROR interior mutability
|
|
|
|
assert_eq!(INTEGER, 8);
|
|
assert!(STRING.is_empty());
|
|
|
|
let a = ATOMIC;
|
|
a.store(4, Ordering::SeqCst);
|
|
assert_eq!(a.load(Ordering::SeqCst), 4);
|
|
|
|
STATIC_TUPLE.0.store(3, Ordering::SeqCst);
|
|
assert_eq!(STATIC_TUPLE.0.load(Ordering::SeqCst), 3);
|
|
assert!(STATIC_TUPLE.1.is_empty());
|
|
|
|
u64::ATOMIC.store(5, Ordering::SeqCst); //~ ERROR interior mutability
|
|
assert_eq!(u64::ATOMIC.load(Ordering::SeqCst), 9); //~ ERROR interior mutability
|
|
|
|
assert_eq!(NO_ANN.to_string(), "70"); // should never lint this.
|
|
}
|