[−][src]Struct internment::Intern
Implementations
impl<T: Eq + Hash + Send + 'static> Intern<T>
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pub fn new(val: T) -> Intern<T>
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Intern a value. If this value has not previously been
interned, then new
will allocate a spot for the value on the
heap. Otherwise, it will return a pointer to the object
previously allocated.
Note that Intern::new
is a bit slow, since it needs to check
a HashSet
protected by a Mutex
.
pub fn from<'a, Q: ?Sized + Eq + Hash + 'a>(val: &'a Q) -> Intern<T> where
T: Borrow<Q> + From<&'a Q>,
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T: Borrow<Q> + From<&'a Q>,
Intern a value from a reference.
If this value has not previously been
interned, then new
will allocate a spot for the value on the
heap and generate that value using T::from(val)
.
pub fn num_objects_interned() -> usize
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See how many objects have been interned. This may be helpful in analyzing memory use.
Trait Implementations
impl<T> AsRef<T> for Intern<T>
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impl<T> Borrow<T> for Intern<T>
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impl<T> Clone for Intern<T>
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fn clone(&self) -> Self
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fn clone_from(&mut self, source: &Self)
1.0.0[src]
impl<T> Copy for Intern<T>
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An Intern
is Copy
, which is unusal for a pointer. This is safe
because we never free the data pointed to by an Intern
.
impl<T: Debug> Debug for Intern<T>
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impl<T: Eq + Hash + Send + Default + 'static> Default for Intern<T>
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impl<T> Deref for Intern<T>
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impl<T: Display> Display for Intern<T>
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impl<T> Eq for Intern<T>
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impl<T: Debug> Fits64 for Intern<T>
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The Fits64
implementation for Intern<T>
is designed to
normally give (relatively) small numbers, by XORing with a fixed
pointer that is also on the heap. This should make the most
significant bits of the resulting u64 be zero, which will mean
that Set64
(which is space-efficient in storing small integers)
can store this result in fewer than 8 bytes.
impl<T: Eq + Hash + Send + 'static> From<T> for Intern<T>
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impl<T> Hash for Intern<T>
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The hash implementation returns the hash of the pointer value, not the hash of the value pointed to. This should be irrelevant, since there is a unique pointer for every value, but it is observable, since you could compare the hash of the pointer with hash of the data itself.
fn hash<H: Hasher>(&self, state: &mut H)
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fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0[src]
H: Hasher,
impl<T: Ord> Ord for Intern<T>
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fn cmp(&self, other: &Self) -> Ordering
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#[must_use]fn max(self, other: Self) -> Self
1.21.0[src]
#[must_use]fn min(self, other: Self) -> Self
1.21.0[src]
#[must_use]fn clamp(self, min: Self, max: Self) -> Self
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impl<T> PartialEq<Intern<T>> for Intern<T>
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impl<T: PartialOrd> PartialOrd<Intern<T>> for Intern<T>
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fn partial_cmp(&self, other: &Self) -> Option<Ordering>
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fn lt(&self, other: &Self) -> bool
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fn le(&self, other: &Self) -> bool
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fn gt(&self, other: &Self) -> bool
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fn ge(&self, other: &Self) -> bool
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impl<T> Pointer for Intern<T>
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impl<T> Send for Intern<T>
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impl<T> Sync for Intern<T>
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Auto Trait Implementations
impl<T> RefUnwindSafe for Intern<T> where
T: RefUnwindSafe,
T: RefUnwindSafe,
impl<T> Unpin for Intern<T>
impl<T> UnwindSafe for Intern<T> where
T: RefUnwindSafe,
T: RefUnwindSafe,
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> From<!> for T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T> ToString for T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<V, T> VZip<V> for T where
V: MultiLane<T>,
V: MultiLane<T>,