1 #![warn(clippy::declare_interior_mutable_const)]
6 use std::sync::atomic::AtomicUsize;
9 const ATOMIC: AtomicUsize = AtomicUsize::new(5); //~ ERROR interior mutable
10 const CELL: Cell<usize> = Cell::new(6); //~ ERROR interior mutable
11 const ATOMIC_TUPLE: ([AtomicUsize; 1], Vec<AtomicUsize>, u8) = ([ATOMIC], Vec::new(), 7);
12 //~^ ERROR interior mutable
14 macro_rules! declare_const {
15 ($name:ident: $ty:ty = $e:expr) => {
16 const $name: $ty = $e;
19 declare_const!(_ONCE: Once = Once::new()); //~ ERROR interior mutable
21 // const ATOMIC_REF: &AtomicUsize = &AtomicUsize::new(7); // This will simply trigger E0492.
23 const INTEGER: u8 = 8;
24 const STRING: String = String::new();
25 const STR: &str = "012345";
26 const COW: Cow<str> = Cow::Borrowed("abcdef");
27 //^ note: a const item of Cow is used in the `postgres` package.
29 const NO_ANN: &dyn Display = &70;
31 static STATIC_TUPLE: (AtomicUsize, String) = (ATOMIC, STRING);
32 //^ there should be no lints on this line
34 #[allow(clippy::declare_interior_mutable_const)]
35 const ONCE_INIT: Once = Once::new();
39 trait Trait<T: Trait2<AssocType5 = AtomicUsize>> {
44 const ATOMIC: AtomicUsize; //~ ERROR interior mutable
49 const INPUT_ASSOC: T::AssocType4;
50 const INPUT_ASSOC_2: T::AssocType5; //~ ERROR interior mutable
51 const ASSOC: Self::AssocType;
52 const ASSOC_2: Self::AssocType2;
53 const WRAPPED_ASSOC_2: Wrapper<Self::AssocType2>;
54 const WRAPPED_ASSOC_3: Wrapper<Self::AssocType3>;
56 const AN_INPUT: T = Self::INPUT;
57 declare_const!(ANOTHER_INPUT: T = Self::INPUT);
58 declare_const!(ANOTHER_ATOMIC: AtomicUsize = Self::ATOMIC); //~ ERROR interior mutable
66 const ASSOC_4: Self::AssocType4;
69 impl<T: Trait2<AssocType5 = AtomicUsize>> Trait<T> for u64 {
71 type AssocType2 = AtomicUsize;
74 const ATOMIC: AtomicUsize = AtomicUsize::new(9);
75 const INTEGER: u64 = 10;
76 const STRING: String = String::new();
77 const SELF: Self = 11;
78 const INPUT: T = T::SELF_2;
79 const INPUT_ASSOC: T::AssocType4 = T::ASSOC_4;
80 const INPUT_ASSOC_2: T::AssocType5 = AtomicUsize::new(16);
81 const ASSOC: Self::AssocType = 13;
82 const ASSOC_2: Self::AssocType2 = AtomicUsize::new(15); //~ ERROR interior mutable
83 const WRAPPED_ASSOC_2: Wrapper<Self::AssocType2> = Wrapper(AtomicUsize::new(16)); //~ ERROR interior mutable
84 const WRAPPED_ASSOC_3: Wrapper<Self::AssocType3> = Wrapper(T::SELF_2);
87 struct Local<T, U>(T, U);
89 impl<T: Trait<U>, U: Trait2<AssocType5 = AtomicUsize>> Local<T, U> {
90 const ASSOC_5: AtomicUsize = AtomicUsize::new(14); //~ ERROR interior mutable
91 const COW: Cow<'static, str> = Cow::Borrowed("tuvwxy");
92 const U_SELF: U = U::SELF_2;
93 const T_ASSOC: T::AssocType = T::ASSOC;
94 const U_ASSOC: U::AssocType5 = AtomicUsize::new(17); //~ ERROR interior mutable