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#![allow(non_local_definitions)]
#![warn(clippy::explicit_into_iter_loop)]
fn main() {
// Issue #4958
fn _takes_iterator<T>(iterator: &T)
where
for<'a> &'a T: IntoIterator<Item = &'a String>,
{
for _ in iterator {}
//~^ explicit_into_iter_loop
}
struct T;
impl IntoIterator for &T {
type Item = ();
type IntoIter = std::vec::IntoIter<Self::Item>;
fn into_iter(self) -> Self::IntoIter {
unimplemented!()
}
}
let mut t = T;
for _ in &t {}
//~^ explicit_into_iter_loop
let r = &t;
for _ in r {}
//~^ explicit_into_iter_loop
// No suggestion for this.
// We'd have to suggest `for _ in *rr {}` which is less clear.
let rr = &&t;
for _ in rr.into_iter() {}
let mr = &mut t;
for _ in &*mr {}
//~^ explicit_into_iter_loop
struct U;
impl IntoIterator for &mut U {
type Item = ();
type IntoIter = std::vec::IntoIter<Self::Item>;
fn into_iter(self) -> Self::IntoIter {
unimplemented!()
}
}
let mut u = U;
for _ in &mut u {}
//~^ explicit_into_iter_loop
let mr = &mut u;
for _ in &mut *mr {}
//~^ explicit_into_iter_loop
// Issue #6900
struct S;
impl S {
#[allow(clippy::should_implement_trait)]
pub fn into_iter<T>(self) -> I<T> {
unimplemented!()
}
}
struct I<T>(T);
impl<T> Iterator for I<T> {
type Item = T;
fn next(&mut self) -> Option<Self::Item> {
unimplemented!()
}
}
for _ in S.into_iter::<u32>() {}
}
fn issue14630() {
macro_rules! mac {
(into_iter $e:expr) => {
$e.into_iter()
};
}
for _ in dbg!([1, 2]) {}
//~^ explicit_into_iter_loop
for _ in mac!(into_iter [1, 2]) {}
}
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