StringHashSet

vstd::hash_set

Struct StringHashSet 

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pub struct StringHashSet { /* private fields */ }
Expand description

StringHashSet is a trusted wrapper around std::collections::HashSet<String> with View implemented for the type vstd::map::Set<Seq<char>>.

This type was created for ease of use with String as it uses &str instead of &String for methods that require shared references. Also, it assumes that obeys_key_model::<String>() holds.

See the Rust documentation for HashSet for details about its implementation.

If you are using std::collections::HashSet directly, see ExHashSet for information on the Verus specifications for this type.

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impl StringHashSet

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pub exec fn new() -> result : Self

ensures
result@ == Set::<Seq<char>>::empty(),

Creates an empty StringHashSet with capacity 0.

See Rust’s HashSet::new() for implementation details.

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pub exec fn with_capacity(capacity: usize) -> result : Self

ensures
result@ == Set::<Seq<char>>::empty(),

Creates an empty StringHashSet with at least capacity for the specified number of elements.

See Rust’s HashSet::with_capacity() for implementation details.

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pub exec fn reserve(&mut self, additional: usize)

ensures
self@ == old(self)@,

Reserves capacity for at least additional number of elements in the set.

See Rust’s HashSet::reserve() for implementation details.

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pub exec fn is_empty(&self) -> result : bool

ensures
result == self@.is_empty(),

Returns true if the set is empty.

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pub uninterp fn spec_len(&self) -> usize

Returns the number of elements in the set.

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pub exec fn len(&self) -> result : usize

ensures
result == self@.len(),

Returns the number of elements in the set.

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pub exec fn insert(&mut self, k: String) -> result : bool

ensures
self@ == old(self)@.insert(k@) && result == !old(self)@.contains(k@),

Inserts the given value into the set. Returns true if the value was not previously in the set, false otherwise.

See Rust’s HashSet::insert() for implementation details.

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pub exec fn remove(&mut self, k: &str) -> result : bool

ensures
self@ == old(self)@.remove(k@) && result == old(self)@.contains(k@),

Removes the given value from the set. Returns true if the value was previously in the set, false otherwise.

See Rust’s HashSet::remove() for implementation details.

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pub exec fn contains(&self, k: &str) -> result : bool

ensures
result == self@.contains(k@),

Returns true if the set contains the given value.

See Rust’s HashSet::contains() for implementation details.

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pub exec fn get<'a>(&'a self, k: &str) -> result : Option<&'a String>

ensures
match result {
    Some(v) => self@.contains(k@) && v@ == k@,
    None => !self@.contains(k@),
},

Returns a reference to the value in the set that is equal to the given value. If the value is not present in the set, returns None.

See Rust’s HashSet::get() for implementation details.

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pub exec fn clear(&mut self)

ensures
self@ == Set::<Seq<char>>::empty(),

Clears all values from the set.

See Rust’s HashSet::clear() for implementation details.

Trait Implementations§

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impl View for StringHashSet

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uninterp fn view(&self) -> Self::V

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type V = Set<Seq<char>>

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Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, VERUS_SPEC__A> FromSpec<T> for VERUS_SPEC__A
where VERUS_SPEC__A: From<T>,

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exec fn obeys_from_spec() -> bool

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exec fn from_spec(v: T) -> VERUS_SPEC__A

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, VERUS_SPEC__A> IntoSpec<T> for VERUS_SPEC__A
where VERUS_SPEC__A: Into<T>,

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exec fn obeys_into_spec() -> bool

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exec fn into_spec(self) -> T

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impl<T, U> IntoSpecImpl<U> for T
where U: From<T>,

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open spec fn obeys_into_spec() -> bool

{ <U as FromSpec<Self>>::obeys_from_spec() }
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open spec fn into_spec(self) -> U

{ U::from_spec(self) }
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, VERUS_SPEC__A> TryFromSpec<T> for VERUS_SPEC__A
where VERUS_SPEC__A: TryFrom<T>,

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exec fn obeys_try_from_spec() -> bool

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exec fn try_from_spec( v: T, ) -> Result<VERUS_SPEC__A, <VERUS_SPEC__A as TryFrom<T>>::Error>

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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T, VERUS_SPEC__A> TryIntoSpec<T> for VERUS_SPEC__A
where VERUS_SPEC__A: TryInto<T>,

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exec fn obeys_try_into_spec() -> bool

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exec fn try_into_spec(self) -> Result<T, <VERUS_SPEC__A as TryInto<T>>::Error>

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impl<T, U> TryIntoSpecImpl<U> for T
where U: TryFrom<T>,

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open spec fn obeys_try_into_spec() -> bool

{ <U as TryFromSpec<Self>>::obeys_try_from_spec() }
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open spec fn try_into_spec(self) -> Result<U, <U as TryFrom<T>>::Error>

{ <U as TryFromSpec<Self>>::try_from_spec(self) }