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47 lines
1.4 KiB
Rust
47 lines
1.4 KiB
Rust
// check-pass
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// edition:2018
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use std::array::IntoIter;
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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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fn main() {
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let array = [0; 10];
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// Before 2021, the method dispatched to `IntoIterator for &[T; N]`,
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// which we continue to support for compatibility.
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let _: Iter<'_, i32> = array.into_iter();
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//~^ WARNING this method call resolves to `<&[T; N] as IntoIterator>::into_iter`
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//~| WARNING this changes meaning
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let _: Iter<'_, i32> = Box::new(array).into_iter();
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//~^ WARNING this method call resolves to `<&[T; N] as IntoIterator>::into_iter`
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//~| WARNING this changes meaning
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let _: Iter<'_, i32> = Rc::new(array).into_iter();
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//~^ WARNING this method call resolves to `<&[T; N] as IntoIterator>::into_iter`
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//~| WARNING this changes meaning
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let _: Iter<'_, i32> = Array(array).into_iter();
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//~^ WARNING this method call resolves to `<&[T; N] 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 array.
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let _: IntoIter<i32, 10> = IntoIterator::into_iter(array);
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for _ in [1, 2, 3].into_iter() {}
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//~^ WARNING this method call resolves to `<&[T; N] 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 an array.
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struct Array([i32; 10]);
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impl Deref for Array {
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type Target = [i32; 10];
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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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