#![warn(clippy::declare_interior_mutable_const)] use std::borrow::Cow; use std::cell::Cell; use std::fmt::Display; use std::sync::atomic::AtomicUsize; use std::sync::Once; const ATOMIC: AtomicUsize = AtomicUsize::new(5); //~ ERROR interior mutable const CELL: Cell = Cell::new(6); //~ ERROR interior mutable const ATOMIC_TUPLE: ([AtomicUsize; 1], Vec, u8) = ([ATOMIC], Vec::new(), 7); //~^ ERROR interior mutable macro_rules! declare_const { ($name:ident: $ty:ty = $e:expr) => { const $name: $ty = $e; }; } declare_const!(_ONCE: Once = Once::new()); //~ ERROR interior mutable // const ATOMIC_REF: &AtomicUsize = &AtomicUsize::new(7); // This will simply trigger E0492. const INTEGER: u8 = 8; const STRING: String = String::new(); const STR: &str = "012345"; const COW: Cow = Cow::Borrowed("abcdef"); //^ note: a const item of Cow is used in the `postgres` package. const NO_ANN: &dyn Display = &70; static STATIC_TUPLE: (AtomicUsize, String) = (ATOMIC, STRING); //^ there should be no lints on this line // issue #8493 thread_local! { static THREAD_LOCAL: Cell = const { Cell::new(0) }; } fn main() {}