diff --git a/library/alloc/src/collections/btree/map/tests.rs b/library/alloc/src/collections/btree/map/tests.rs index b39b5409ae44f..65468d5fe5716 100644 --- a/library/alloc/src/collections/btree/map/tests.rs +++ b/library/alloc/src/collections/btree/map/tests.rs @@ -17,14 +17,10 @@ use std::ops::RangeBounds; use std::panic::{catch_unwind, AssertUnwindSafe}; use std::sync::atomic::{AtomicUsize, Ordering::SeqCst}; -// Capacity of a tree with a single level, -// i.e., a tree who's root is a leaf node at height 0. -const NODE_CAPACITY: usize = node::CAPACITY; - // Minimum number of elements to insert, to guarantee a tree with 2 levels, // i.e., a tree who's root is an internal node at height 1, with edges to leaf nodes. // It's not the minimum size: removing an element from such a tree does not always reduce height. -const MIN_INSERTS_HEIGHT_1: usize = NODE_CAPACITY + 1; +const MIN_INSERTS_HEIGHT_1: usize = node::CAPACITY + 1; // Minimum number of elements to insert in ascending order, to guarantee a tree with 3 levels, // i.e., a tree who's root is an internal node at height 2, with edges to more internal nodes. @@ -180,7 +176,7 @@ fn test_levels() { #[should_panic] fn test_check_ord_chaos() { let gov = Governor::new(); - let map: BTreeMap<_, _> = (0..2).map(|i| (Governed(i, &gov), ())).collect(); + let map = BTreeMap::from([(Governed(1, &gov), ()), (Governed(2, &gov), ())]); gov.flip(); map.check(); } @@ -189,7 +185,7 @@ fn test_check_ord_chaos() { #[test] fn test_check_invariants_ord_chaos() { let gov = Governor::new(); - let map: BTreeMap<_, _> = (0..2).map(|i| (Governed(i, &gov), ())).collect(); + let map = BTreeMap::from([(Governed(1, &gov), ()), (Governed(2, &gov), ())]); gov.flip(); map.check_invariants(); } @@ -337,8 +333,7 @@ fn test_basic_small() { fn test_iter() { // Miri is too slow let size = if cfg!(miri) { 200 } else { 10000 }; - - let mut map: BTreeMap<_, _> = (0..size).map(|i| (i, i)).collect(); + let mut map = BTreeMap::from_iter((0..size).map(|i| (i, i))); fn test(size: usize, mut iter: T) where @@ -360,8 +355,7 @@ fn test_iter() { fn test_iter_rev() { // Miri is too slow let size = if cfg!(miri) { 200 } else { 10000 }; - - let mut map: BTreeMap<_, _> = (0..size).map(|i| (i, i)).collect(); + let mut map = BTreeMap::from_iter((0..size).map(|i| (i, i))); fn test(size: usize, mut iter: T) where @@ -386,7 +380,7 @@ where >::Error: Debug, { let zero = T::try_from(0).unwrap(); - let mut map: BTreeMap = (0..size).map(|i| (T::try_from(i).unwrap(), zero)).collect(); + let mut map = BTreeMap::from_iter((0..size).map(|i| (T::try_from(i).unwrap(), zero))); // Forward and backward iteration sees enough pairs (also tested elsewhere) assert_eq!(map.iter_mut().count(), size); @@ -452,7 +446,7 @@ fn test_iter_mut_mutation() { #[test] fn test_values_mut() { - let mut a: BTreeMap<_, _> = (0..MIN_INSERTS_HEIGHT_2).map(|i| (i, i)).collect(); + let mut a = BTreeMap::from_iter((0..MIN_INSERTS_HEIGHT_2).map(|i| (i, i))); test_all_refs(&mut 13, a.values_mut()); a.check(); } @@ -467,14 +461,14 @@ fn test_values_mut_mutation() { value.push_str("!"); } - let values: Vec = a.values().cloned().collect(); + let values = Vec::from_iter(a.values().cloned()); assert_eq!(values, [String::from("hello!"), String::from("goodbye!")]); a.check(); } #[test] fn test_iter_entering_root_twice() { - let mut map: BTreeMap<_, _> = (0..2).map(|i| (i, i)).collect(); + let mut map = BTreeMap::from([(0, 0), (1, 1)]); let mut it = map.iter_mut(); let front = it.next().unwrap(); let back = it.next_back().unwrap(); @@ -491,7 +485,7 @@ fn test_iter_entering_root_twice() { #[test] fn test_iter_descending_to_same_node_twice() { - let mut map: BTreeMap<_, _> = (0..MIN_INSERTS_HEIGHT_1).map(|i| (i, i)).collect(); + let mut map = BTreeMap::from_iter((0..MIN_INSERTS_HEIGHT_1).map(|i| (i, i))); let mut it = map.iter_mut(); // Descend into first child. let front = it.next().unwrap(); @@ -509,7 +503,7 @@ fn test_iter_mixed() { // Miri is too slow let size = if cfg!(miri) { 200 } else { 10000 }; - let mut map: BTreeMap<_, _> = (0..size).map(|i| (i, i)).collect(); + let mut map = BTreeMap::from_iter((0..size).map(|i| (i, i))); fn test(size: usize, mut iter: T) where @@ -569,21 +563,19 @@ fn test_iter_min_max() { } fn range_keys(map: &BTreeMap, range: impl RangeBounds) -> Vec { - map.range(range) - .map(|(&k, &v)| { - assert_eq!(k, v); - k - }) - .collect() + Vec::from_iter(map.range(range).map(|(&k, &v)| { + assert_eq!(k, v); + k + })) } #[test] fn test_range_small() { let size = 4; - let map: BTreeMap<_, _> = (1..=size).map(|i| (i, i)).collect(); - let all: Vec<_> = (1..=size).collect(); + let all = Vec::from_iter(1..=size); let (first, last) = (vec![all[0]], vec![all[size as usize - 1]]); + let map = BTreeMap::from_iter(all.iter().copied().map(|i| (i, i))); assert_eq!(range_keys(&map, (Excluded(0), Excluded(size + 1))), all); assert_eq!(range_keys(&map, (Excluded(0), Included(size + 1))), all); @@ -638,10 +630,9 @@ fn test_range_small() { #[test] fn test_range_height_1() { - // Tests tree with a root and 2 leaves. The single key in the root node is - // close to the middle among the keys. - - let map: BTreeMap<_, _> = (0..MIN_INSERTS_HEIGHT_1 as i32).map(|i| (i, i)).collect(); + // Tests tree with a root and 2 leaves. We test around the middle of the + // keys because one of those is the single key in the root node. + let map = BTreeMap::from_iter((0..MIN_INSERTS_HEIGHT_1 as i32).map(|i| (i, i))); let middle = MIN_INSERTS_HEIGHT_1 as i32 / 2; for root in middle - 2..=middle + 2 { assert_eq!(range_keys(&map, (Excluded(root), Excluded(root + 1))), vec![]); @@ -660,9 +651,9 @@ fn test_range_height_1() { fn test_range_large() { let size = 200; - let map: BTreeMap<_, _> = (1..=size).map(|i| (i, i)).collect(); - let all: Vec<_> = (1..=size).collect(); + let all = Vec::from_iter(1..=size); let (first, last) = (vec![all[0]], vec![all[size as usize - 1]]); + let map = BTreeMap::from_iter(all.iter().copied().map(|i| (i, i))); assert_eq!(range_keys(&map, (Excluded(0), Excluded(size + 1))), all); assert_eq!(range_keys(&map, (Excluded(0), Included(size + 1))), all); @@ -715,9 +706,7 @@ fn test_range_large() { L: IntoIterator, R: IntoIterator, { - let lhs: Vec<_> = lhs.into_iter().collect(); - let rhs: Vec<_> = rhs.into_iter().collect(); - assert_eq!(lhs, rhs); + assert_eq!(Vec::from_iter(lhs), Vec::from_iter(rhs)); } check(map.range(..=100), map.range(..101)); @@ -728,14 +717,13 @@ fn test_range_large() { #[test] fn test_range_inclusive_max_value() { let max = usize::MAX; - let map: BTreeMap<_, _> = [(max, 0)].into_iter().collect(); - - assert_eq!(map.range(max..=max).collect::>(), &[(&max, &0)]); + let map = BTreeMap::from([(max, 0)]); + assert_eq!(Vec::from_iter(map.range(max..=max)), &[(&max, &0)]); } #[test] fn test_range_equal_empty_cases() { - let map: BTreeMap<_, _> = (0..5).map(|i| (i, i)).collect(); + let map = BTreeMap::from_iter((0..5).map(|i| (i, i))); assert_eq!(map.range((Included(2), Excluded(2))).next(), None); assert_eq!(map.range((Excluded(2), Included(2))).next(), None); } @@ -743,35 +731,35 @@ fn test_range_equal_empty_cases() { #[test] #[should_panic] fn test_range_equal_excluded() { - let map: BTreeMap<_, _> = (0..5).map(|i| (i, i)).collect(); + let map = BTreeMap::from_iter((0..5).map(|i| (i, i))); let _ = map.range((Excluded(2), Excluded(2))); } #[test] #[should_panic] fn test_range_backwards_1() { - let map: BTreeMap<_, _> = (0..5).map(|i| (i, i)).collect(); + let map = BTreeMap::from_iter((0..5).map(|i| (i, i))); let _ = map.range((Included(3), Included(2))); } #[test] #[should_panic] fn test_range_backwards_2() { - let map: BTreeMap<_, _> = (0..5).map(|i| (i, i)).collect(); + let map = BTreeMap::from_iter((0..5).map(|i| (i, i))); let _ = map.range((Included(3), Excluded(2))); } #[test] #[should_panic] fn test_range_backwards_3() { - let map: BTreeMap<_, _> = (0..5).map(|i| (i, i)).collect(); + let map = BTreeMap::from_iter((0..5).map(|i| (i, i))); let _ = map.range((Excluded(3), Included(2))); } #[test] #[should_panic] fn test_range_backwards_4() { - let map: BTreeMap<_, _> = (0..5).map(|i| (i, i)).collect(); + let map = BTreeMap::from_iter((0..5).map(|i| (i, i))); let _ = map.range((Excluded(3), Excluded(2))); } @@ -823,7 +811,7 @@ fn test_range_finding_ill_order_in_range_ord() { } } - let map = (0..12).map(|i| (CompositeKey(i, EvilTwin(i)), ())).collect::>(); + let map = BTreeMap::from_iter((0..12).map(|i| (CompositeKey(i, EvilTwin(i)), ()))); let _ = map.range(EvilTwin(5)..=EvilTwin(7)); } @@ -831,7 +819,7 @@ fn test_range_finding_ill_order_in_range_ord() { fn test_range_1000() { // Miri is too slow let size = if cfg!(miri) { MIN_INSERTS_HEIGHT_2 as u32 } else { 1000 }; - let map: BTreeMap<_, _> = (0..size).map(|i| (i, i)).collect(); + let map = BTreeMap::from_iter((0..size).map(|i| (i, i))); fn test(map: &BTreeMap, size: u32, min: Bound<&u32>, max: Bound<&u32>) { let mut kvs = map.range((min, max)).map(|(&k, &v)| (k, v)); @@ -870,7 +858,7 @@ fn test_range() { let size = 200; // Miri is too slow let step = if cfg!(miri) { 66 } else { 1 }; - let map: BTreeMap<_, _> = (0..size).map(|i| (i, i)).collect(); + let map = BTreeMap::from_iter((0..size).map(|i| (i, i))); for i in (0..size).step_by(step) { for j in (i..size).step_by(step) { @@ -891,7 +879,7 @@ fn test_range_mut() { let size = 200; // Miri is too slow let step = if cfg!(miri) { 66 } else { 1 }; - let mut map: BTreeMap<_, _> = (0..size).map(|i| (i, i)).collect(); + let mut map = BTreeMap::from_iter((0..size).map(|i| (i, i))); for i in (0..size).step_by(step) { for j in (i..size).step_by(step) { @@ -910,7 +898,7 @@ fn test_range_mut() { #[test] fn test_retain() { - let mut map: BTreeMap = (0..100).map(|x| (x, x * 10)).collect(); + let mut map = BTreeMap::from_iter((0..100).map(|x| (x, x * 10))); map.retain(|&k, _| k % 2 == 0); assert_eq!(map.len(), 50); @@ -934,7 +922,7 @@ mod test_drain_filter { #[test] fn consumed_keeping_all() { let pairs = (0..3).map(|i| (i, i)); - let mut map: BTreeMap<_, _> = pairs.collect(); + let mut map = BTreeMap::from_iter(pairs); assert!(map.drain_filter(|_, _| false).eq(iter::empty())); map.check(); } @@ -943,7 +931,7 @@ mod test_drain_filter { #[test] fn consumed_removing_all() { let pairs = (0..3).map(|i| (i, i)); - let mut map: BTreeMap<_, _> = pairs.clone().collect(); + let mut map = BTreeMap::from_iter(pairs.clone()); assert!(map.drain_filter(|_, _| true).eq(pairs)); assert!(map.is_empty()); map.check(); @@ -953,7 +941,7 @@ mod test_drain_filter { #[test] fn mutating_and_keeping() { let pairs = (0..3).map(|i| (i, i)); - let mut map: BTreeMap<_, _> = pairs.collect(); + let mut map = BTreeMap::from_iter(pairs); assert!( map.drain_filter(|_, v| { *v += 6; @@ -970,7 +958,7 @@ mod test_drain_filter { #[test] fn mutating_and_removing() { let pairs = (0..3).map(|i| (i, i)); - let mut map: BTreeMap<_, _> = pairs.collect(); + let mut map = BTreeMap::from_iter(pairs); assert!( map.drain_filter(|_, v| { *v += 6; @@ -985,7 +973,7 @@ mod test_drain_filter { #[test] fn underfull_keeping_all() { let pairs = (0..3).map(|i| (i, i)); - let mut map: BTreeMap<_, _> = pairs.collect(); + let mut map = BTreeMap::from_iter(pairs); map.drain_filter(|_, _| false); assert!(map.keys().copied().eq(0..3)); map.check(); @@ -995,7 +983,7 @@ mod test_drain_filter { fn underfull_removing_one() { let pairs = (0..3).map(|i| (i, i)); for doomed in 0..3 { - let mut map: BTreeMap<_, _> = pairs.clone().collect(); + let mut map = BTreeMap::from_iter(pairs.clone()); map.drain_filter(|i, _| *i == doomed); assert_eq!(map.len(), 2); map.check(); @@ -1006,7 +994,7 @@ mod test_drain_filter { fn underfull_keeping_one() { let pairs = (0..3).map(|i| (i, i)); for sacred in 0..3 { - let mut map: BTreeMap<_, _> = pairs.clone().collect(); + let mut map = BTreeMap::from_iter(pairs.clone()); map.drain_filter(|i, _| *i != sacred); assert!(map.keys().copied().eq(sacred..=sacred)); map.check(); @@ -1016,7 +1004,7 @@ mod test_drain_filter { #[test] fn underfull_removing_all() { let pairs = (0..3).map(|i| (i, i)); - let mut map: BTreeMap<_, _> = pairs.collect(); + let mut map = BTreeMap::from_iter(pairs); map.drain_filter(|_, _| true); assert!(map.is_empty()); map.check(); @@ -1024,29 +1012,29 @@ mod test_drain_filter { #[test] fn height_0_keeping_all() { - let pairs = (0..NODE_CAPACITY).map(|i| (i, i)); - let mut map: BTreeMap<_, _> = pairs.collect(); + let pairs = (0..node::CAPACITY).map(|i| (i, i)); + let mut map = BTreeMap::from_iter(pairs); map.drain_filter(|_, _| false); - assert!(map.keys().copied().eq(0..NODE_CAPACITY)); + assert!(map.keys().copied().eq(0..node::CAPACITY)); map.check(); } #[test] fn height_0_removing_one() { - let pairs = (0..NODE_CAPACITY).map(|i| (i, i)); - for doomed in 0..NODE_CAPACITY { - let mut map: BTreeMap<_, _> = pairs.clone().collect(); + let pairs = (0..node::CAPACITY).map(|i| (i, i)); + for doomed in 0..node::CAPACITY { + let mut map = BTreeMap::from_iter(pairs.clone()); map.drain_filter(|i, _| *i == doomed); - assert_eq!(map.len(), NODE_CAPACITY - 1); + assert_eq!(map.len(), node::CAPACITY - 1); map.check(); } } #[test] fn height_0_keeping_one() { - let pairs = (0..NODE_CAPACITY).map(|i| (i, i)); - for sacred in 0..NODE_CAPACITY { - let mut map: BTreeMap<_, _> = pairs.clone().collect(); + let pairs = (0..node::CAPACITY).map(|i| (i, i)); + for sacred in 0..node::CAPACITY { + let mut map = BTreeMap::from_iter(pairs.clone()); map.drain_filter(|i, _| *i != sacred); assert!(map.keys().copied().eq(sacred..=sacred)); map.check(); @@ -1055,8 +1043,8 @@ mod test_drain_filter { #[test] fn height_0_removing_all() { - let pairs = (0..NODE_CAPACITY).map(|i| (i, i)); - let mut map: BTreeMap<_, _> = pairs.collect(); + let pairs = (0..node::CAPACITY).map(|i| (i, i)); + let mut map = BTreeMap::from_iter(pairs); map.drain_filter(|_, _| true); assert!(map.is_empty()); map.check(); @@ -1064,7 +1052,7 @@ mod test_drain_filter { #[test] fn height_0_keeping_half() { - let mut map: BTreeMap<_, _> = (0..16).map(|i| (i, i)).collect(); + let mut map = BTreeMap::from_iter((0..16).map(|i| (i, i))); assert_eq!(map.drain_filter(|i, _| *i % 2 == 0).count(), 8); assert_eq!(map.len(), 8); map.check(); @@ -1073,7 +1061,7 @@ mod test_drain_filter { #[test] fn height_1_removing_all() { let pairs = (0..MIN_INSERTS_HEIGHT_1).map(|i| (i, i)); - let mut map: BTreeMap<_, _> = pairs.collect(); + let mut map = BTreeMap::from_iter(pairs); map.drain_filter(|_, _| true); assert!(map.is_empty()); map.check(); @@ -1083,7 +1071,7 @@ mod test_drain_filter { fn height_1_removing_one() { let pairs = (0..MIN_INSERTS_HEIGHT_1).map(|i| (i, i)); for doomed in 0..MIN_INSERTS_HEIGHT_1 { - let mut map: BTreeMap<_, _> = pairs.clone().collect(); + let mut map = BTreeMap::from_iter(pairs.clone()); map.drain_filter(|i, _| *i == doomed); assert_eq!(map.len(), MIN_INSERTS_HEIGHT_1 - 1); map.check(); @@ -1094,7 +1082,7 @@ mod test_drain_filter { fn height_1_keeping_one() { let pairs = (0..MIN_INSERTS_HEIGHT_1).map(|i| (i, i)); for sacred in 0..MIN_INSERTS_HEIGHT_1 { - let mut map: BTreeMap<_, _> = pairs.clone().collect(); + let mut map = BTreeMap::from_iter(pairs.clone()); map.drain_filter(|i, _| *i != sacred); assert!(map.keys().copied().eq(sacred..=sacred)); map.check(); @@ -1105,7 +1093,7 @@ mod test_drain_filter { fn height_2_removing_one() { let pairs = (0..MIN_INSERTS_HEIGHT_2).map(|i| (i, i)); for doomed in (0..MIN_INSERTS_HEIGHT_2).step_by(12) { - let mut map: BTreeMap<_, _> = pairs.clone().collect(); + let mut map = BTreeMap::from_iter(pairs.clone()); map.drain_filter(|i, _| *i == doomed); assert_eq!(map.len(), MIN_INSERTS_HEIGHT_2 - 1); map.check(); @@ -1116,7 +1104,7 @@ mod test_drain_filter { fn height_2_keeping_one() { let pairs = (0..MIN_INSERTS_HEIGHT_2).map(|i| (i, i)); for sacred in (0..MIN_INSERTS_HEIGHT_2).step_by(12) { - let mut map: BTreeMap<_, _> = pairs.clone().collect(); + let mut map = BTreeMap::from_iter(pairs.clone()); map.drain_filter(|i, _| *i != sacred); assert!(map.keys().copied().eq(sacred..=sacred)); map.check(); @@ -1126,7 +1114,7 @@ mod test_drain_filter { #[test] fn height_2_removing_all() { let pairs = (0..MIN_INSERTS_HEIGHT_2).map(|i| (i, i)); - let mut map: BTreeMap<_, _> = pairs.collect(); + let mut map = BTreeMap::from_iter(pairs); map.drain_filter(|_, _| true); assert!(map.is_empty()); map.check(); @@ -1287,7 +1275,7 @@ fn test_borrow() { fn test_entry() { let xs = [(1, 10), (2, 20), (3, 30), (4, 40), (5, 50), (6, 60)]; - let mut map: BTreeMap<_, _> = xs.iter().cloned().collect(); + let mut map = BTreeMap::from(xs); // Existing key (insert) match map.entry(1) { @@ -1415,7 +1403,7 @@ fn test_bad_zst() { #[test] fn test_clear() { let mut map = BTreeMap::new(); - for &len in &[MIN_INSERTS_HEIGHT_1, MIN_INSERTS_HEIGHT_2, 0, NODE_CAPACITY] { + for &len in &[MIN_INSERTS_HEIGHT_1, MIN_INSERTS_HEIGHT_2, 0, node::CAPACITY] { for i in 0..len { map.insert(i, ()); } @@ -1485,7 +1473,7 @@ fn test_clone() { } // Test a tree with 2 semi-full levels and a tree with 3 levels. - map = (1..MIN_INSERTS_HEIGHT_2).map(|i| (i, i)).collect(); + map = BTreeMap::from_iter((1..MIN_INSERTS_HEIGHT_2).map(|i| (i, i))); assert_eq!(map.len(), MIN_INSERTS_HEIGHT_2 - 1); assert_eq!(map, map.clone()); map.insert(0, 0); @@ -1496,14 +1484,11 @@ fn test_clone() { fn test_clone_panic_leak(size: usize) { for i in 0..size { - let dummies: Vec = (0..size).map(|id| CrashTestDummy::new(id)).collect(); - let map: BTreeMap<_, ()> = dummies - .iter() - .map(|dummy| { - let panic = if dummy.id == i { Panic::InClone } else { Panic::Never }; - (dummy.spawn(panic), ()) - }) - .collect(); + let dummies = Vec::from_iter((0..size).map(|id| CrashTestDummy::new(id))); + let map = BTreeMap::from_iter(dummies.iter().map(|dummy| { + let panic = if dummy.id == i { Panic::InClone } else { Panic::Never }; + (dummy.spawn(panic), ()) + })); catch_unwind(|| map.clone()).unwrap_err(); for d in &dummies { @@ -1864,9 +1849,9 @@ fn test_first_last_entry() { #[test] fn test_insert_into_full_height_0() { - let size = NODE_CAPACITY; + let size = node::CAPACITY; for pos in 0..=size { - let mut map: BTreeMap<_, _> = (0..size).map(|i| (i * 2 + 1, ())).collect(); + let mut map = BTreeMap::from_iter((0..size).map(|i| (i * 2 + 1, ()))); assert!(map.insert(pos * 2, ()).is_none()); map.check(); } @@ -1874,14 +1859,14 @@ fn test_insert_into_full_height_0() { #[test] fn test_insert_into_full_height_1() { - let size = NODE_CAPACITY + 1 + NODE_CAPACITY; + let size = node::CAPACITY + 1 + node::CAPACITY; for pos in 0..=size { - let mut map: BTreeMap<_, _> = (0..size).map(|i| (i * 2 + 1, ())).collect(); + let mut map = BTreeMap::from_iter((0..size).map(|i| (i * 2 + 1, ()))); map.compact(); let root_node = map.root.as_ref().unwrap().reborrow(); assert_eq!(root_node.len(), 1); - assert_eq!(root_node.first_leaf_edge().into_node().len(), NODE_CAPACITY); - assert_eq!(root_node.last_leaf_edge().into_node().len(), NODE_CAPACITY); + assert_eq!(root_node.first_leaf_edge().into_node().len(), node::CAPACITY); + assert_eq!(root_node.last_leaf_edge().into_node().len(), node::CAPACITY); assert!(map.insert(pos * 2, ()).is_none()); map.check(); @@ -2022,7 +2007,7 @@ fn test_split_off_empty_left() { #[test] fn test_split_off_tiny_left_height_2() { let pairs = (0..MIN_INSERTS_HEIGHT_2).map(|i| (i, i)); - let mut left: BTreeMap<_, _> = pairs.clone().collect(); + let mut left = BTreeMap::from_iter(pairs.clone()); let right = left.split_off(&1); left.check(); right.check(); @@ -2038,7 +2023,7 @@ fn test_split_off_tiny_left_height_2() { fn test_split_off_tiny_right_height_2() { let pairs = (0..MIN_INSERTS_HEIGHT_2).map(|i| (i, i)); let last = MIN_INSERTS_HEIGHT_2 - 1; - let mut left: BTreeMap<_, _> = pairs.clone().collect(); + let mut left = BTreeMap::from_iter(pairs.clone()); assert_eq!(*left.last_key_value().unwrap().0, last); let right = left.split_off(&last); left.check(); @@ -2052,7 +2037,7 @@ fn test_split_off_tiny_right_height_2() { #[test] fn test_split_off_halfway() { let mut rng = DeterministicRng::new(); - for &len in &[NODE_CAPACITY, 25, 50, 75, 100] { + for &len in &[node::CAPACITY, 25, 50, 75, 100] { let mut data = Vec::from_iter((0..len).map(|_| (rng.next(), ()))); // Insertion in non-ascending order creates some variation in node length. let mut map = BTreeMap::from_iter(data.iter().copied()); @@ -2112,13 +2097,11 @@ fn test_into_iter_drop_leak_height_0() { fn test_into_iter_drop_leak_height_1() { let size = MIN_INSERTS_HEIGHT_1; for panic_point in vec![0, 1, size - 2, size - 1] { - let dummies: Vec<_> = (0..size).map(|i| CrashTestDummy::new(i)).collect(); - let map: BTreeMap<_, _> = (0..size) - .map(|i| { - let panic = if i == panic_point { Panic::InDrop } else { Panic::Never }; - (dummies[i].spawn(Panic::Never), dummies[i].spawn(panic)) - }) - .collect(); + let dummies = Vec::from_iter((0..size).map(|i| CrashTestDummy::new(i))); + let map = BTreeMap::from_iter((0..size).map(|i| { + let panic = if i == panic_point { Panic::InDrop } else { Panic::Never }; + (dummies[i].spawn(Panic::Never), dummies[i].spawn(panic)) + })); catch_unwind(move || drop(map.into_iter())).unwrap_err(); for i in 0..size { assert_eq!(dummies[i].dropped(), 2); @@ -2128,9 +2111,8 @@ fn test_into_iter_drop_leak_height_1() { #[test] fn test_into_keys() { - let vec = [(1, 'a'), (2, 'b'), (3, 'c')]; - let map: BTreeMap<_, _> = vec.into_iter().collect(); - let keys: Vec<_> = map.into_keys().collect(); + let map = BTreeMap::from([(1, 'a'), (2, 'b'), (3, 'c')]); + let keys = Vec::from_iter(map.into_keys()); assert_eq!(keys.len(), 3); assert!(keys.contains(&1)); @@ -2140,9 +2122,8 @@ fn test_into_keys() { #[test] fn test_into_values() { - let vec = vec![(1, 'a'), (2, 'b'), (3, 'c')]; - let map: BTreeMap<_, _> = vec.into_iter().collect(); - let values: Vec<_> = map.into_values().collect(); + let map = BTreeMap::from([(1, 'a'), (2, 'b'), (3, 'c')]); + let values = Vec::from_iter(map.into_values()); assert_eq!(values.len(), 3); assert!(values.contains(&'a')); diff --git a/library/alloc/src/collections/btree/set.rs b/library/alloc/src/collections/btree/set.rs index a4315be74e36c..3031bf86a7be1 100644 --- a/library/alloc/src/collections/btree/set.rs +++ b/library/alloc/src/collections/btree/set.rs @@ -1539,7 +1539,7 @@ impl<'a, T: Ord> Iterator for SymmetricDifference<'a, T> { fn size_hint(&self) -> (usize, Option) { let (a_len, b_len) = self.0.lens(); // No checked_add, because even if a and b refer to the same set, - // and T is an empty type, the storage overhead of sets limits + // and T is a zero-sized type, the storage overhead of sets limits // the number of elements to less than half the range of usize. (0, Some(a_len + b_len)) } diff --git a/library/alloc/src/collections/btree/set/tests.rs b/library/alloc/src/collections/btree/set/tests.rs index 7390ff5a59c8c..7865d37ae51f1 100644 --- a/library/alloc/src/collections/btree/set/tests.rs +++ b/library/alloc/src/collections/btree/set/tests.rs @@ -91,7 +91,7 @@ fn test_intersection() { return; } - let large = (0..100).collect::>(); + let large = Vec::from_iter(0..100); check_intersection(&[], &large, &[]); check_intersection(&large, &[], &[]); check_intersection(&[-1], &large, &[]); @@ -107,8 +107,8 @@ fn test_intersection() { #[test] fn test_intersection_size_hint() { - let x: BTreeSet = [3, 4].iter().copied().collect(); - let y: BTreeSet = [1, 2, 3].iter().copied().collect(); + let x = BTreeSet::from([3, 4]); + let y = BTreeSet::from([1, 2, 3]); let mut iter = x.intersection(&y); assert_eq!(iter.size_hint(), (1, Some(1))); assert_eq!(iter.next(), Some(&3)); @@ -145,7 +145,7 @@ fn test_difference() { return; } - let large = (0..100).collect::>(); + let large = Vec::from_iter(0..100); check_difference(&[], &large, &[]); check_difference(&[-1], &large, &[-1]); check_difference(&[0], &large, &[]); @@ -159,43 +159,43 @@ fn test_difference() { #[test] fn test_difference_size_hint() { - let s246: BTreeSet = [2, 4, 6].iter().copied().collect(); - let s23456: BTreeSet = (2..=6).collect(); + let s246 = BTreeSet::from([2, 4, 6]); + let s23456 = BTreeSet::from_iter(2..=6); let mut iter = s246.difference(&s23456); assert_eq!(iter.size_hint(), (0, Some(3))); assert_eq!(iter.next(), None); - let s12345: BTreeSet = (1..=5).collect(); + let s12345 = BTreeSet::from_iter(1..=5); iter = s246.difference(&s12345); assert_eq!(iter.size_hint(), (0, Some(3))); assert_eq!(iter.next(), Some(&6)); assert_eq!(iter.size_hint(), (0, Some(0))); assert_eq!(iter.next(), None); - let s34567: BTreeSet = (3..=7).collect(); + let s34567 = BTreeSet::from_iter(3..=7); iter = s246.difference(&s34567); assert_eq!(iter.size_hint(), (0, Some(3))); assert_eq!(iter.next(), Some(&2)); assert_eq!(iter.size_hint(), (0, Some(2))); assert_eq!(iter.next(), None); - let s1: BTreeSet = (-9..=1).collect(); + let s1 = BTreeSet::from_iter(-9..=1); iter = s246.difference(&s1); assert_eq!(iter.size_hint(), (3, Some(3))); - let s2: BTreeSet = (-9..=2).collect(); + let s2 = BTreeSet::from_iter(-9..=2); iter = s246.difference(&s2); assert_eq!(iter.size_hint(), (2, Some(2))); assert_eq!(iter.next(), Some(&4)); assert_eq!(iter.size_hint(), (1, Some(1))); - let s23: BTreeSet = (2..=3).collect(); + let s23 = BTreeSet::from([2, 3]); iter = s246.difference(&s23); assert_eq!(iter.size_hint(), (1, Some(3))); assert_eq!(iter.next(), Some(&4)); assert_eq!(iter.size_hint(), (1, Some(1))); - let s4: BTreeSet = (4..=4).collect(); + let s4 = BTreeSet::from([4]); iter = s246.difference(&s4); assert_eq!(iter.size_hint(), (2, Some(3))); assert_eq!(iter.next(), Some(&2)); @@ -204,19 +204,19 @@ fn test_difference_size_hint() { assert_eq!(iter.size_hint(), (0, Some(0))); assert_eq!(iter.next(), None); - let s56: BTreeSet = (5..=6).collect(); + let s56 = BTreeSet::from([5, 6]); iter = s246.difference(&s56); assert_eq!(iter.size_hint(), (1, Some(3))); assert_eq!(iter.next(), Some(&2)); assert_eq!(iter.size_hint(), (0, Some(2))); - let s6: BTreeSet = (6..=19).collect(); + let s6 = BTreeSet::from_iter(6..=19); iter = s246.difference(&s6); assert_eq!(iter.size_hint(), (2, Some(2))); assert_eq!(iter.next(), Some(&2)); assert_eq!(iter.size_hint(), (1, Some(1))); - let s7: BTreeSet = (7..=19).collect(); + let s7 = BTreeSet::from_iter(7..=19); iter = s246.difference(&s7); assert_eq!(iter.size_hint(), (3, Some(3))); } @@ -235,8 +235,8 @@ fn test_symmetric_difference() { #[test] fn test_symmetric_difference_size_hint() { - let x: BTreeSet = [2, 4].iter().copied().collect(); - let y: BTreeSet = [1, 2, 3].iter().copied().collect(); + let x = BTreeSet::from([2, 4]); + let y = BTreeSet::from([1, 2, 3]); let mut iter = x.symmetric_difference(&y); assert_eq!(iter.size_hint(), (0, Some(5))); assert_eq!(iter.next(), Some(&1)); @@ -263,8 +263,8 @@ fn test_union() { #[test] fn test_union_size_hint() { - let x: BTreeSet = [2, 4].iter().copied().collect(); - let y: BTreeSet = [1, 2, 3].iter().copied().collect(); + let x = BTreeSet::from([2, 4]); + let y = BTreeSet::from([1, 2, 3]); let mut iter = x.union(&y); assert_eq!(iter.size_hint(), (3, Some(5))); assert_eq!(iter.next(), Some(&1)); @@ -276,8 +276,8 @@ fn test_union_size_hint() { #[test] // Only tests the simple function definition with respect to intersection fn test_is_disjoint() { - let one = [1].iter().collect::>(); - let two = [2].iter().collect::>(); + let one = BTreeSet::from([1]); + let two = BTreeSet::from([2]); assert!(one.is_disjoint(&two)); } @@ -285,8 +285,8 @@ fn test_is_disjoint() { // Also implicitly tests the trivial function definition of is_superset fn test_is_subset() { fn is_subset(a: &[i32], b: &[i32]) -> bool { - let set_a = a.iter().collect::>(); - let set_b = b.iter().collect::>(); + let set_a = BTreeSet::from_iter(a.iter()); + let set_b = BTreeSet::from_iter(b.iter()); set_a.is_subset(&set_b) } @@ -310,7 +310,7 @@ fn test_is_subset() { return; } - let large = (0..100).collect::>(); + let large = Vec::from_iter(0..100); assert_eq!(is_subset(&[], &large), true); assert_eq!(is_subset(&large, &[]), false); assert_eq!(is_subset(&[-1], &large), false); @@ -321,8 +321,7 @@ fn test_is_subset() { #[test] fn test_retain() { - let xs = [1, 2, 3, 4, 5, 6]; - let mut set: BTreeSet = xs.iter().cloned().collect(); + let mut set = BTreeSet::from([1, 2, 3, 4, 5, 6]); set.retain(|&k| k % 2 == 0); assert_eq!(set.len(), 3); assert!(set.contains(&2)); @@ -332,8 +331,8 @@ fn test_retain() { #[test] fn test_drain_filter() { - let mut x: BTreeSet<_> = [1].iter().copied().collect(); - let mut y: BTreeSet<_> = [1].iter().copied().collect(); + let mut x = BTreeSet::from([1]); + let mut y = BTreeSet::from([1]); x.drain_filter(|_| true); y.drain_filter(|_| false); @@ -417,7 +416,7 @@ fn test_zip() { fn test_from_iter() { let xs = [1, 2, 3, 4, 5, 6, 7, 8, 9]; - let set: BTreeSet<_> = xs.iter().cloned().collect(); + let set = BTreeSet::from_iter(xs.iter()); for x in &xs { assert!(set.contains(x));