pub enum GlobalAlloc<'tcx> {
    Function(Instance<'tcx>),
    VTable(Ty<'tcx>, Option<PolyExistentialTraitRef<'tcx>>),
    Static(DefId),
    Memory(ConstAllocation<'tcx>),
}
Expand description

An allocation in the global (tcx-managed) memory can be either a function pointer, a static, or a “real” allocation with some data in it.

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Function(Instance<'tcx>)

The alloc ID is used as a function pointer.

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VTable(Ty<'tcx>, Option<PolyExistentialTraitRef<'tcx>>)

This alloc ID points to a symbolic (not-reified) vtable.

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Static(DefId)

The alloc ID points to a “lazy” static variable that did not get computed (yet). This is also used to break the cycle in recursive statics.

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Memory(ConstAllocation<'tcx>)

The alloc ID points to memory.

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impl<'tcx> GlobalAlloc<'tcx>

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pub fn unwrap_memory(&self) -> ConstAllocation<'tcx>

Panics if the GlobalAlloc does not refer to an GlobalAlloc::Memory

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pub fn unwrap_fn(&self) -> Instance<'tcx>

Panics if the GlobalAlloc is not GlobalAlloc::Function

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pub fn unwrap_vtable(&self) -> (Ty<'tcx>, Option<PolyExistentialTraitRef<'tcx>>)

Panics if the GlobalAlloc is not GlobalAlloc::VTable

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pub fn address_space(&self, cx: &impl HasDataLayout) -> AddressSpace

The address space that this GlobalAlloc should be placed in.

Trait Implementations§

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impl<'tcx> Clone for GlobalAlloc<'tcx>

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fn clone(&self) -> GlobalAlloc<'tcx>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<'tcx> Debug for GlobalAlloc<'tcx>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<'tcx, __D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<__D> for GlobalAlloc<'tcx>

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fn decode(__decoder: &mut __D) -> Self

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impl<'tcx, __E: TyEncoder<I = TyCtxt<'tcx>>> Encodable<__E> for GlobalAlloc<'tcx>

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fn encode(&self, __encoder: &mut __E)

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impl<'tcx> Hash for GlobalAlloc<'tcx>

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl<'tcx, '__ctx> HashStable<StableHashingContext<'__ctx>> for GlobalAlloc<'tcx>

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fn hash_stable( &self, __hcx: &mut StableHashingContext<'__ctx>, __hasher: &mut StableHasher )

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impl<'tcx> PartialEq<GlobalAlloc<'tcx>> for GlobalAlloc<'tcx>

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fn eq(&self, other: &GlobalAlloc<'tcx>) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<'tcx> Eq for GlobalAlloc<'tcx>

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impl<'tcx> StructuralEq for GlobalAlloc<'tcx>

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impl<'tcx> StructuralPartialEq for GlobalAlloc<'tcx>

Auto Trait Implementations§

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impl<'tcx> !RefUnwindSafe for GlobalAlloc<'tcx>

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impl<'tcx> Send for GlobalAlloc<'tcx>

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impl<'tcx> Sync for GlobalAlloc<'tcx>

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impl<'tcx> Unpin for GlobalAlloc<'tcx>

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impl<'tcx> !UnwindSafe for GlobalAlloc<'tcx>

Blanket Implementations§

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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impl<T> Any for Twhere 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 Twhere 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 Twhere 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, R> CollectAndApply<T, R> for T

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fn collect_and_apply<I, F>(iter: I, f: F) -> Rwhere I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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impl<Tcx, T> DepNodeParams<Tcx> for Twhere Tcx: DepContext, T: for<'a> HashStable<StableHashingContext<'a>> + Debug,

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default fn fingerprint_style() -> FingerprintStyle

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default fn to_fingerprint(&self, tcx: Tcx) -> Fingerprint

This method turns the parameters of a DepNodeConstructor into an opaque Fingerprint to be used in DepNode. Not all DepNodeParams support being turned into a Fingerprint (they don’t need to if the corresponding DepNode is anonymous).
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default fn to_debug_str(&self, _: Tcx) -> String

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default fn recover(_: Tcx, _: &DepNode) -> Option<T>

This method tries to recover the query key from the given DepNode, something which is needed when forcing DepNodes during red-green evaluation. The query system will only call this method if fingerprint_style() is not FingerprintStyle::Opaque. It is always valid to return None here, in which case incremental compilation will treat the query as having changed instead of forcing it.
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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, U> Into<U> for Twhere 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<P> IntoQueryParam<P> for P

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impl<T> MaybeResult<T> for T

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type Error = !

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fn from(_: Result<T, <T as MaybeResult<T>>::Error>) -> T

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fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<'tcx, T> ToPredicate<'tcx, T> for T

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fn to_predicate(self, _tcx: TyCtxt<'tcx>) -> T

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impl<T, U> TryFrom<U> for Twhere 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, U> TryInto<U> for Twhere 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<Tcx, T> Value<Tcx> for Twhere Tcx: DepContext,

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default fn from_cycle_error( tcx: Tcx, cycle: &[QueryInfo], _guar: ErrorGuaranteed ) -> T

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Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 40 bytes

Size for each variant:

  • Function: 36 bytes
  • VTable: 36 bytes
  • Static: 8 bytes
  • Memory: 12 bytes