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Add extend to HashMap and StringHashMap #1295

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merged 4 commits into from
Oct 17, 2024
Merged

Add extend to HashMap and StringHashMap #1295

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22c3022
Add extend to HashMap and StringHashMap
marshtompsxd Oct 2, 2024
7893343
add ex spec
marshtompsxd Oct 2, 2024
89a55a6
Revert some changes on test and ex spec
marshtompsxd Oct 2, 2024
2fdb8a3
Rename extend to union_prefer_right
marshtompsxd Oct 17, 2024
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16 changes: 16 additions & 0 deletions source/vstd/hash_map.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -110,6 +110,14 @@ impl<Key, Value> HashMapWithView<Key, Value> where Key: View + Eq + Hash {
{
self.m.clear()
}

#[verifier::external_body]
pub fn union_prefer_right(&mut self, other: Self)
ensures
self@ == old(self)@.union_prefer_right(other@),
{
self.m.extend(other.m)
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}
}

pub broadcast proof fn axiom_hash_map_with_view_spec_len<Key, Value>(
Expand Down Expand Up @@ -211,6 +219,14 @@ impl<Value> StringHashMap<Value> {
{
self.m.clear()
}

#[verifier::external_body]
pub fn union_prefer_right(&mut self, other: Self)
ensures
self@ == old(self)@.union_prefer_right(other@),
{
self.m.extend(other.m)
}
}

pub broadcast proof fn axiom_string_hash_map_spec_len<Value>(m: &StringHashMap<Value>)
Expand Down