62 lines
1.6 KiB
Rust
62 lines
1.6 KiB
Rust
//@run-rustfix
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#![warn(clippy::from_iter_instead_of_collect)]
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#![allow(unused_imports, unused_tuple_struct_fields)]
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use std::collections::{BTreeMap, BTreeSet, HashMap, VecDeque};
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struct Foo(Vec<bool>);
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impl FromIterator<bool> for Foo {
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fn from_iter<T: IntoIterator<Item = bool>>(_: T) -> Self {
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todo!()
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}
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}
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impl<'a> FromIterator<&'a bool> for Foo {
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fn from_iter<T: IntoIterator<Item = &'a bool>>(iter: T) -> Self {
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<Self as FromIterator<bool>>::from_iter(iter.into_iter().copied())
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}
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}
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fn main() {
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let iter_expr = std::iter::repeat(5).take(5);
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let _ = Vec::from_iter(iter_expr);
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let _ = HashMap::<usize, &i8>::from_iter(vec![5, 5, 5, 5].iter().enumerate());
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Vec::from_iter(vec![42u32]);
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let a = vec![0, 1, 2];
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assert_eq!(a, Vec::from_iter(0..3));
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assert_eq!(a, Vec::<i32>::from_iter(0..3));
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let mut b = VecDeque::from_iter(0..3);
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b.push_back(4);
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let mut b = VecDeque::<i32>::from_iter(0..3);
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b.push_back(4);
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{
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use std::collections;
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let mut b = collections::VecDeque::<i32>::from_iter(0..3);
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b.push_back(4);
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}
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let values = [(0, 'a'), (1, 'b'), (2, 'c'), (3, 'd')];
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let bm = BTreeMap::from_iter(values.iter().cloned());
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let mut bar = BTreeMap::from_iter(bm.range(0..2));
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bar.insert(&4, &'e');
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let mut bts = BTreeSet::from_iter(0..3);
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bts.insert(2);
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{
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use std::collections;
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let _ = collections::BTreeSet::from_iter(0..3);
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let _ = collections::BTreeSet::<u32>::from_iter(0..3);
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}
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for _i in Vec::from_iter([1, 2, 3].iter()) {}
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for _i in Vec::<&i32>::from_iter([1, 2, 3].iter()) {}
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}
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