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