70 lines
1.4 KiB
Rust
70 lines
1.4 KiB
Rust
//@run-rustfix
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#![warn(clippy::explicit_into_iter_loop)]
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fn main() {
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// Issue #4958
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fn _takes_iterator<T>(iterator: &T)
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where
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for<'a> &'a T: IntoIterator<Item = &'a String>,
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{
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for _ in iterator {}
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}
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struct T;
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impl IntoIterator for &T {
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type Item = ();
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type IntoIter = std::vec::IntoIter<Self::Item>;
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fn into_iter(self) -> Self::IntoIter {
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unimplemented!()
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}
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}
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let mut t = T;
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for _ in &t {}
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let r = &t;
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for _ in r {}
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// No suggestion for this.
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// We'd have to suggest `for _ in *rr {}` which is less clear.
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let rr = &&t;
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for _ in rr.into_iter() {}
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let mr = &mut t;
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for _ in &*mr {}
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struct U;
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impl IntoIterator for &mut U {
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type Item = ();
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type IntoIter = std::vec::IntoIter<Self::Item>;
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fn into_iter(self) -> Self::IntoIter {
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unimplemented!()
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}
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}
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let mut u = U;
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for _ in &mut u {}
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let mr = &mut u;
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for _ in &mut *mr {}
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// Issue #6900
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struct S;
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impl S {
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#[allow(clippy::should_implement_trait)]
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pub fn into_iter<T>(self) -> I<T> {
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unimplemented!()
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}
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}
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struct I<T>(T);
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impl<T> Iterator for I<T> {
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type Item = T;
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fn next(&mut self) -> Option<Self::Item> {
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unimplemented!()
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}
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}
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for _ in S.into_iter::<u32>() {}
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}
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