mirror of https://github.com/rust-lang/rust
47 lines
1.6 KiB
Rust
47 lines
1.6 KiB
Rust
//@ check-pass
|
|
//@ edition:2018
|
|
|
|
use std::ops::Deref;
|
|
use std::rc::Rc;
|
|
use std::slice::Iter;
|
|
use std::vec::IntoIter;
|
|
|
|
fn main() {
|
|
let boxed_slice = vec![0; 10].into_boxed_slice();
|
|
|
|
// Before 2024, the method dispatched to `IntoIterator for Box<[T]>`,
|
|
// which we continue to support for compatibility.
|
|
let _: Iter<'_, i32> = boxed_slice.into_iter();
|
|
//~^ WARNING this method call resolves to `<&Box<[T]> as IntoIterator>::into_iter`
|
|
//~| WARNING this changes meaning
|
|
|
|
let _: Iter<'_, i32> = Box::new(boxed_slice.clone()).into_iter();
|
|
//~^ WARNING this method call resolves to `<&Box<[T]> as IntoIterator>::into_iter`
|
|
//~| WARNING this changes meaning
|
|
|
|
let _: Iter<'_, i32> = Rc::new(boxed_slice.clone()).into_iter();
|
|
//~^ WARNING this method call resolves to `<&Box<[T]> as IntoIterator>::into_iter`
|
|
//~| WARNING this changes meaning
|
|
let _: Iter<'_, i32> = Array(boxed_slice.clone()).into_iter();
|
|
//~^ WARNING this method call resolves to `<&Box<[T]> as IntoIterator>::into_iter`
|
|
//~| WARNING this changes meaning
|
|
|
|
// But you can always use the trait method explicitly as an boxed_slice.
|
|
let _: IntoIter<i32> = IntoIterator::into_iter(boxed_slice);
|
|
|
|
for _ in (Box::new([1, 2, 3]) as Box<[_]>).into_iter() {}
|
|
//~^ WARNING this method call resolves to `<&Box<[T]> as IntoIterator>::into_iter`
|
|
//~| WARNING this changes meaning
|
|
}
|
|
|
|
/// User type that dereferences to a boxed slice.
|
|
struct Array(Box<[i32]>);
|
|
|
|
impl Deref for Array {
|
|
type Target = Box<[i32]>;
|
|
|
|
fn deref(&self) -> &Self::Target {
|
|
&self.0
|
|
}
|
|
}
|