mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-27 15:11:30 +00:00
93 lines
2.9 KiB
Rust
93 lines
2.9 KiB
Rust
#![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<usize> = Cell::new(6); //~ ERROR interior mutable
|
|
const ATOMIC_TUPLE: ([AtomicUsize; 1], Vec<AtomicUsize>, 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<str> = 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
|
|
|
|
#[allow(clippy::declare_interior_mutable_const)]
|
|
const ONCE_INIT: Once = Once::new();
|
|
|
|
trait Trait<T>: Copy {
|
|
type NonCopyType;
|
|
|
|
const ATOMIC: AtomicUsize; //~ ERROR interior mutable
|
|
const INTEGER: u64;
|
|
const STRING: String;
|
|
const SELF: Self; // (no error)
|
|
const INPUT: T;
|
|
//~^ ERROR interior mutable
|
|
//~| HELP consider requiring `T` to be `Copy`
|
|
const ASSOC: Self::NonCopyType;
|
|
//~^ ERROR interior mutable
|
|
//~| HELP consider requiring `<Self as Trait<T>>::NonCopyType` to be `Copy`
|
|
|
|
const AN_INPUT: T = Self::INPUT;
|
|
//~^ ERROR interior mutable
|
|
//~| ERROR consider requiring `T` to be `Copy`
|
|
declare_const!(ANOTHER_INPUT: T = Self::INPUT); //~ ERROR interior mutable
|
|
}
|
|
|
|
trait Trait2 {
|
|
type CopyType: Copy;
|
|
|
|
const SELF_2: Self;
|
|
//~^ ERROR interior mutable
|
|
//~| HELP consider requiring `Self` to be `Copy`
|
|
const ASSOC_2: Self::CopyType; // (no error)
|
|
}
|
|
|
|
// we don't lint impl of traits, because an impl has no power to change the interface.
|
|
impl Trait<u32> for u64 {
|
|
type NonCopyType = u16;
|
|
|
|
const ATOMIC: AtomicUsize = AtomicUsize::new(9);
|
|
const INTEGER: u64 = 10;
|
|
const STRING: String = String::new();
|
|
const SELF: Self = 11;
|
|
const INPUT: u32 = 12;
|
|
const ASSOC: Self::NonCopyType = 13;
|
|
}
|
|
|
|
struct Local<T, U>(T, U);
|
|
|
|
impl<T: Trait2 + Trait<u32>, U: Trait2> Local<T, U> {
|
|
const ASSOC_3: AtomicUsize = AtomicUsize::new(14); //~ ERROR interior mutable
|
|
const COW: Cow<'static, str> = Cow::Borrowed("tuvwxy");
|
|
const T_SELF: T = T::SELF_2;
|
|
const U_SELF: U = U::SELF_2;
|
|
//~^ ERROR interior mutable
|
|
//~| HELP consider requiring `U` to be `Copy`
|
|
const T_ASSOC: T::NonCopyType = T::ASSOC;
|
|
//~^ ERROR interior mutable
|
|
//~| HELP consider requiring `<T as Trait<u32>>::NonCopyType` to be `Copy`
|
|
const U_ASSOC: U::CopyType = U::ASSOC_2;
|
|
}
|
|
|
|
fn main() {}
|