3 #![warn(clippy::from_iter_instead_of_collect)]
4 #![allow(unused_imports, unused_tuple_struct_fields)]
6 use std::collections::{BTreeMap, BTreeSet, HashMap, VecDeque};
10 impl FromIterator<bool> for Foo {
11 fn from_iter<T: IntoIterator<Item = bool>>(_: T) -> Self {
16 impl<'a> FromIterator<&'a bool> for Foo {
17 fn from_iter<T: IntoIterator<Item = &'a bool>>(iter: T) -> Self {
18 <Self as FromIterator<bool>>::from_iter(iter.into_iter().copied())
23 let iter_expr = std::iter::repeat(5).take(5);
24 let _ = Vec::from_iter(iter_expr);
26 let _ = HashMap::<usize, &i8>::from_iter(vec![5, 5, 5, 5].iter().enumerate());
28 Vec::from_iter(vec![42u32]);
30 let a = vec![0, 1, 2];
31 assert_eq!(a, Vec::from_iter(0..3));
32 assert_eq!(a, Vec::<i32>::from_iter(0..3));
34 let mut b = VecDeque::from_iter(0..3);
37 let mut b = VecDeque::<i32>::from_iter(0..3);
42 let mut b = collections::VecDeque::<i32>::from_iter(0..3);
46 let values = [(0, 'a'), (1, 'b'), (2, 'c'), (3, 'd')];
47 let bm = BTreeMap::from_iter(values.iter().cloned());
48 let mut bar = BTreeMap::from_iter(bm.range(0..2));
51 let mut bts = BTreeSet::from_iter(0..3);
55 let _ = collections::BTreeSet::from_iter(0..3);
56 let _ = collections::BTreeSet::<u32>::from_iter(0..3);
59 for _i in Vec::from_iter([1, 2, 3].iter()) {}
60 for _i in Vec::<&i32>::from_iter([1, 2, 3].iter()) {}