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//@ check-pass
//@ edition:2018
use std::array::IntoIter;
use std::ops::Deref;
use std::rc::Rc;
use std::slice::Iter;
fn main() {
let array = [0; 10];
// Before 2021, the method dispatched to `IntoIterator for &[T; N]`,
// which we continue to support for compatibility.
let _: Iter<'_, i32> = array.into_iter();
//~^ WARNING this method call resolves to `<&[T; N] as IntoIterator>::into_iter`
//~| WARNING this changes meaning
let _: Iter<'_, i32> = Box::new(array).into_iter();
//~^ WARNING this method call resolves to `<&[T; N] as IntoIterator>::into_iter`
//~| WARNING this changes meaning
let _: Iter<'_, i32> = Rc::new(array).into_iter();
//~^ WARNING this method call resolves to `<&[T; N] as IntoIterator>::into_iter`
//~| WARNING this changes meaning
let _: Iter<'_, i32> = Array(array).into_iter();
//~^ WARNING this method call resolves to `<&[T; N] as IntoIterator>::into_iter`
//~| WARNING this changes meaning
// But you can always use the trait method explicitly as an array.
let _: IntoIter<i32, 10> = IntoIterator::into_iter(array);
for _ in [1, 2, 3].into_iter() {}
//~^ WARNING this method call resolves to `<&[T; N] as IntoIterator>::into_iter`
//~| WARNING this changes meaning
}
/// User type that dereferences to an array.
struct Array([i32; 10]);
impl Deref for Array {
type Target = [i32; 10];
fn deref(&self) -> &Self::Target {
&self.0
}
}
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