3 #![warn(clippy::from_iter_instead_of_collect)]
4 #![allow(unused_imports)]
6 use std::collections::{BTreeMap, BTreeSet, HashMap, VecDeque};
7 use std::iter::FromIterator;
10 let iter_expr = std::iter::repeat(5).take(5);
11 let _ = Vec::from_iter(iter_expr);
13 let _ = HashMap::<usize, &i8>::from_iter(vec![5, 5, 5, 5].iter().enumerate());
15 Vec::from_iter(vec![42u32]);
17 let a = vec![0, 1, 2];
18 assert_eq!(a, Vec::from_iter(0..3));
19 assert_eq!(a, Vec::<i32>::from_iter(0..3));
21 let mut b = VecDeque::from_iter(0..3);
24 let mut b = VecDeque::<i32>::from_iter(0..3);
29 let mut b = collections::VecDeque::<i32>::from_iter(0..3);
33 let values = [(0, 'a'), (1, 'b'), (2, 'c'), (3, 'd')];
34 let bm = BTreeMap::from_iter(values.iter().cloned());
35 let mut bar = BTreeMap::from_iter(bm.range(0..2));
38 let mut bts = BTreeSet::from_iter(0..3);
42 let _ = collections::BTreeSet::from_iter(0..3);
43 let _ = collections::BTreeSet::<u32>::from_iter(0..3);
46 for _i in Vec::from_iter([1, 2, 3].iter()) {}
47 for _i in Vec::<&i32>::from_iter([1, 2, 3].iter()) {}