Import hashlink-0.6.0

* Add Android.bp, OWNERS, METADATA and other 3p package required files.

Bug: 171754295
Test: build all rust crates.
Change-Id: Id6544f49b77a3edd0ee9e691e2dc1124dbf65f0a

1 files changed, 512 insertions, 0 deletions

diff --git a/tests/linked_hash_set.rs b/tests/linked_hash_set.rs
new file mode 100644
index 0000000..13cceae
--- /dev/null
+++ b/tests/linked_hash_set.rs
@@ -0,0 +1,512 @@
+use hashbrown::hash_map::DefaultHashBuilder;
+use hashlink::linked_hash_set::{self, LinkedHashSet};
+
+#[allow(dead_code)]
+fn assert_covariance() {
+    fn set<'new>(v: LinkedHashSet<&'static str>) -> LinkedHashSet<&'new str> {
+        v
+    }
+
+    fn iter<'a, 'new>(
+        v: linked_hash_set::Iter<'a, &'static str>,
+    ) -> linked_hash_set::Iter<'a, &'new str> {
+        v
+    }
+
+    fn into_iter<'new>(
+        v: linked_hash_set::IntoIter<&'static str>,
+    ) -> linked_hash_set::IntoIter<&'new str> {
+        v
+    }
+
+    fn difference<'a, 'new>(
+        v: linked_hash_set::Difference<'a, &'static str, DefaultHashBuilder>,
+    ) -> linked_hash_set::Difference<'a, &'new str, DefaultHashBuilder> {
+        v
+    }
+
+    fn symmetric_difference<'a, 'new>(
+        v: linked_hash_set::SymmetricDifference<'a, &'static str, DefaultHashBuilder>,
+    ) -> linked_hash_set::SymmetricDifference<'a, &'new str, DefaultHashBuilder> {
+        v
+    }
+
+    fn intersection<'a, 'new>(
+        v: linked_hash_set::Intersection<'a, &'static str, DefaultHashBuilder>,
+    ) -> linked_hash_set::Intersection<'a, &'new str, DefaultHashBuilder> {
+        v
+    }
+
+    fn union<'a, 'new>(
+        v: linked_hash_set::Union<'a, &'static str, DefaultHashBuilder>,
+    ) -> linked_hash_set::Union<'a, &'new str, DefaultHashBuilder> {
+        v
+    }
+
+    fn drain<'new>(
+        d: linked_hash_set::Drain<'static, &'static str>,
+    ) -> linked_hash_set::Drain<'new, &'new str> {
+        d
+    }
+}
+
+#[test]
+fn test_zero_capacities() {
+    type HS = LinkedHashSet<i32>;
+
+    let s = HS::new();
+    assert_eq!(s.capacity(), 0);
+
+    let s = HS::default();
+    assert_eq!(s.capacity(), 0);
+
+    let s = HS::with_hasher(DefaultHashBuilder::default());
+    assert_eq!(s.capacity(), 0);
+
+    let s = HS::with_capacity(0);
+    assert_eq!(s.capacity(), 0);
+
+    let s = HS::with_capacity_and_hasher(0, DefaultHashBuilder::default());
+    assert_eq!(s.capacity(), 0);
+
+    let mut s = HS::new();
+    s.insert(1);
+    s.insert(2);
+    s.remove(&1);
+    s.remove(&2);
+    s.shrink_to_fit();
+    assert_eq!(s.capacity(), 0);
+
+    let mut s = HS::new();
+    s.reserve(0);
+    assert_eq!(s.capacity(), 0);
+}
+
+#[test]
+fn test_disjoint() {
+    let mut xs = LinkedHashSet::new();
+    let mut ys = LinkedHashSet::new();
+    assert!(xs.is_disjoint(&ys));
+    assert!(ys.is_disjoint(&xs));
+    assert!(xs.insert(5));
+    assert!(ys.insert(11));
+    assert!(xs.is_disjoint(&ys));
+    assert!(ys.is_disjoint(&xs));
+    assert!(xs.insert(7));
+    assert!(xs.insert(19));
+    assert!(xs.insert(4));
+    assert!(ys.insert(2));
+    assert!(ys.insert(-11));
+    assert!(xs.is_disjoint(&ys));
+    assert!(ys.is_disjoint(&xs));
+    assert!(ys.insert(7));
+    assert!(!xs.is_disjoint(&ys));
+    assert!(!ys.is_disjoint(&xs));
+}
+
+#[test]
+fn test_subset_and_superset() {
+    let mut a = LinkedHashSet::new();
+    assert!(a.insert(0));
+    assert!(a.insert(5));
+    assert!(a.insert(11));
+    assert!(a.insert(7));
+
+    let mut b = LinkedHashSet::new();
+    assert!(b.insert(0));
+    assert!(b.insert(7));
+    assert!(b.insert(19));
+    assert!(b.insert(250));
+    assert!(b.insert(11));
+    assert!(b.insert(200));
+
+    assert!(!a.is_subset(&b));
+    assert!(!a.is_superset(&b));
+    assert!(!b.is_subset(&a));
+    assert!(!b.is_superset(&a));
+
+    assert!(b.insert(5));
+
+    assert!(a.is_subset(&b));
+    assert!(!a.is_superset(&b));
+    assert!(!b.is_subset(&a));
+    assert!(b.is_superset(&a));
+}
+
+#[test]
+fn test_iterate() {
+    let mut a = LinkedHashSet::new();
+    for i in 0..32 {
+        assert!(a.insert(i));
+    }
+    let mut observed: u32 = 0;
+    for k in &a {
+        observed |= 1 << *k;
+    }
+    assert_eq!(observed, 0xFFFF_FFFF);
+}
+
+#[test]
+fn test_intersection() {
+    let mut a = LinkedHashSet::new();
+    let mut b = LinkedHashSet::new();
+
+    assert!(a.insert(11));
+    assert!(a.insert(1));
+    assert!(a.insert(3));
+    assert!(a.insert(77));
+    assert!(a.insert(103));
+    assert!(a.insert(5));
+    assert!(a.insert(-5));
+
+    assert!(b.insert(2));
+    assert!(b.insert(11));
+    assert!(b.insert(77));
+    assert!(b.insert(-9));
+    assert!(b.insert(-42));
+    assert!(b.insert(5));
+    assert!(b.insert(3));
+
+    let mut i = 0;
+    let expected = [3, 5, 11, 77];
+    for x in a.intersection(&b) {
+        assert!(expected.contains(x));
+        i += 1
+    }
+    assert_eq!(i, expected.len());
+}
+
+#[test]
+fn test_difference() {
+    let mut a = LinkedHashSet::new();
+    let mut b = LinkedHashSet::new();
+
+    assert!(a.insert(1));
+    assert!(a.insert(3));
+    assert!(a.insert(5));
+    assert!(a.insert(9));
+    assert!(a.insert(11));
+
+    assert!(b.insert(3));
+    assert!(b.insert(9));
+
+    let mut i = 0;
+    let expected = [1, 5, 11];
+    for x in a.difference(&b) {
+        assert!(expected.contains(x));
+        i += 1
+    }
+    assert_eq!(i, expected.len());
+}
+
+#[test]
+fn test_symmetric_difference() {
+    let mut a = LinkedHashSet::new();
+    let mut b = LinkedHashSet::new();
+
+    assert!(a.insert(1));
+    assert!(a.insert(3));
+    assert!(a.insert(5));
+    assert!(a.insert(9));
+    assert!(a.insert(11));
+
+    assert!(b.insert(-2));
+    assert!(b.insert(3));
+    assert!(b.insert(9));
+    assert!(b.insert(14));
+    assert!(b.insert(22));
+
+    let mut i = 0;
+    let expected = [-2, 1, 5, 11, 14, 22];
+    for x in a.symmetric_difference(&b) {
+        assert!(expected.contains(x));
+        i += 1
+    }
+    assert_eq!(i, expected.len());
+}
+
+#[test]
+fn test_union() {
+    let mut a = LinkedHashSet::new();
+    let mut b = LinkedHashSet::new();
+
+    assert!(a.insert(1));
+    assert!(a.insert(3));
+    assert!(a.insert(5));
+    assert!(a.insert(9));
+    assert!(a.insert(11));
+    assert!(a.insert(16));
+    assert!(a.insert(19));
+    assert!(a.insert(24));
+
+    assert!(b.insert(-2));
+    assert!(b.insert(1));
+    assert!(b.insert(5));
+    assert!(b.insert(9));
+    assert!(b.insert(13));
+    assert!(b.insert(19));
+
+    let mut i = 0;
+    let expected = [-2, 1, 3, 5, 9, 11, 13, 16, 19, 24];
+    for x in a.union(&b) {
+        assert!(expected.contains(x));
+        i += 1
+    }
+    assert_eq!(i, expected.len());
+}
+
+#[test]
+fn test_from_iter() {
+    let xs = [1, 2, 3, 4, 5, 6, 7, 8, 9];
+
+    let set: LinkedHashSet<_> = xs.iter().cloned().collect();
+
+    for x in &xs {
+        assert!(set.contains(x));
+    }
+}
+
+#[test]
+fn test_move_iter() {
+    let hs = {
+        let mut hs = LinkedHashSet::new();
+
+        hs.insert('a');
+        hs.insert('b');
+
+        hs
+    };
+
+    let v = hs.into_iter().collect::<Vec<char>>();
+    assert!(v == ['a', 'b'] || v == ['b', 'a']);
+}
+
+#[test]
+fn test_eq() {
+    let mut s1 = LinkedHashSet::new();
+
+    s1.insert(1);
+    s1.insert(2);
+    s1.insert(3);
+
+    let mut s2 = LinkedHashSet::new();
+
+    s2.insert(1);
+    s2.insert(2);
+
+    assert!(s1 != s2);
+
+    s2.insert(3);
+
+    assert_eq!(s1, s2);
+}
+
+#[test]
+fn test_show() {
+    let mut set = LinkedHashSet::new();
+    let empty = LinkedHashSet::<i32>::new();
+
+    set.insert(1);
+    set.insert(2);
+
+    let set_str = format!("{:?}", set);
+
+    assert!(set_str == "{1, 2}" || set_str == "{2, 1}");
+    assert_eq!(format!("{:?}", empty), "{}");
+}
+
+#[test]
+fn test_trivial_drain() {
+    let mut s = LinkedHashSet::<i32>::new();
+    for _ in s.drain() {}
+    assert!(s.is_empty());
+    drop(s);
+
+    let mut s = LinkedHashSet::<i32>::new();
+    drop(s.drain());
+    assert!(s.is_empty());
+}
+
+#[test]
+fn test_drain() {
+    let mut s: LinkedHashSet<_> = (1..100).collect();
+
+    for _ in 0..20 {
+        assert_eq!(s.len(), 99);
+
+        {
+            let mut last_i = 0;
+            let mut d = s.drain();
+            for (i, x) in d.by_ref().take(50).enumerate() {
+                last_i = i;
+                assert!(x != 0);
+            }
+            assert_eq!(last_i, 49);
+        }
+
+        for _ in &s {
+            panic!("s should be empty!");
+        }
+
+        s.extend(1..100);
+    }
+}
+
+#[test]
+fn test_replace() {
+    use core::hash;
+
+    #[derive(Debug)]
+    struct Foo(&'static str, i32);
+
+    impl PartialEq for Foo {
+        fn eq(&self, other: &Self) -> bool {
+            self.0 == other.0
+        }
+    }
+
+    impl Eq for Foo {}
+
+    impl hash::Hash for Foo {
+        fn hash<H: hash::Hasher>(&self, h: &mut H) {
+            self.0.hash(h);
+        }
+    }
+
+    let mut s = LinkedHashSet::new();
+    assert_eq!(s.replace(Foo("a", 1)), None);
+    assert_eq!(s.len(), 1);
+    assert_eq!(s.replace(Foo("a", 2)), Some(Foo("a", 1)));
+    assert_eq!(s.len(), 1);
+
+    let mut it = s.iter();
+    assert_eq!(it.next(), Some(&Foo("a", 2)));
+    assert_eq!(it.next(), None);
+}
+
+#[test]
+fn test_extend_ref() {
+    let mut a = LinkedHashSet::new();
+    a.insert(1);
+
+    a.extend(&[2, 3, 4]);
+
+    assert_eq!(a.len(), 4);
+    assert!(a.contains(&1));
+    assert!(a.contains(&2));
+    assert!(a.contains(&3));
+    assert!(a.contains(&4));
+
+    let mut b = LinkedHashSet::new();
+    b.insert(5);
+    b.insert(6);
+
+    a.extend(&b);
+
+    assert_eq!(a.len(), 6);
+    assert!(a.contains(&1));
+    assert!(a.contains(&2));
+    assert!(a.contains(&3));
+    assert!(a.contains(&4));
+    assert!(a.contains(&5));
+    assert!(a.contains(&6));
+}
+
+#[test]
+fn test_retain() {
+    let xs = [1, 2, 3, 4, 5, 6];
+    let mut set: LinkedHashSet<i32> = xs.iter().cloned().collect();
+    set.retain(|&k| k % 2 == 0);
+    assert_eq!(set.len(), 3);
+    assert!(set.contains(&2));
+    assert!(set.contains(&4));
+    assert!(set.contains(&6));
+}
+
+#[test]
+fn insert_order() {
+    let mut set = LinkedHashSet::new();
+    set.insert(1);
+    set.insert(2);
+    set.insert(3);
+    set.insert(4);
+    assert_eq!(
+        set.clone().into_iter().collect::<Vec<_>>(),
+        vec![1, 2, 3, 4]
+    );
+    assert_eq!(set.into_iter().collect::<Vec<_>>(), vec![1, 2, 3, 4]);
+}
+
+#[test]
+fn front_back() {
+    let mut set = LinkedHashSet::new();
+    set.insert(1);
+    set.insert(2);
+    set.insert(3);
+    set.insert(4);
+    assert_eq!(set.front(), Some(&1));
+    assert_eq!(set.back(), Some(&4));
+    assert_eq!(set.pop_back(), Some(4));
+    assert_eq!(set.back(), Some(&3));
+    assert_eq!(set.pop_front(), Some(1));
+    assert_eq!(set.front(), Some(&2));
+}
+
+#[test]
+fn double_ended_iter() {
+    let mut set = LinkedHashSet::new();
+    set.insert(1);
+    set.insert(2);
+    set.insert(3);
+    set.insert(4);
+
+    let mut iter = set.iter();
+    assert_eq!(iter.next(), Some(&1));
+    assert_eq!(iter.next(), Some(&2));
+    assert_eq!(iter.next_back(), Some(&4));
+    assert_eq!(iter.next_back(), Some(&3));
+    assert_eq!(iter.next_back(), None);
+    assert_eq!(iter.next(), None);
+    assert_eq!(iter.next_back(), None);
+    drop(iter);
+
+    let mut iter = set.drain();
+    assert_eq!(iter.next(), Some(1));
+    assert_eq!(iter.next(), Some(2));
+    assert_eq!(iter.next_back(), Some(4));
+    assert_eq!(iter.next_back(), Some(3));
+    assert_eq!(iter.next_back(), None);
+    assert_eq!(iter.next(), None);
+    assert_eq!(iter.next_back(), None);
+    drop(iter);
+
+    set.insert(1);
+    set.insert(2);
+    set.insert(3);
+    set.insert(4);
+
+    let mut iter = set.into_iter();
+    assert_eq!(iter.next(), Some(1));
+    assert_eq!(iter.next(), Some(2));
+    assert_eq!(iter.next_back(), Some(4));
+    assert_eq!(iter.next_back(), Some(3));
+    assert_eq!(iter.next_back(), None);
+    assert_eq!(iter.next(), None);
+    assert_eq!(iter.next_back(), None);
+}
+
+#[test]
+fn to_back_front_order() {
+    let mut set = LinkedHashSet::new();
+    set.insert(1);
+    set.insert(2);
+    set.insert(3);
+    set.insert(4);
+
+    assert_eq!(set.back().copied(), Some(4));
+    assert_eq!(set.front().copied(), Some(1));
+    set.to_back(&2);
+    assert_eq!(set.back().copied(), Some(2));
+    set.to_front(&3);
+    assert_eq!(set.front().copied(), Some(3));
+}