Enum stable_mir::mir::alloc::GlobalAlloc

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pub enum GlobalAlloc {
    Function(Instance),
    VTable(Ty, Option<Binder<ExistentialTraitRef>>),
    Static(StaticDef),
    Memory(Allocation),
}
Expand description

An allocation in the SMIR global memory can be either a function pointer, a static, or a “real” allocation with some data in it.

Variants§

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Function(Instance)

The alloc ID is used as a function pointer.

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VTable(Ty, Option<Binder<ExistentialTraitRef>>)

This alloc ID points to a symbolic (not-reified) vtable. The None trait ref is used to represent auto traits.

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Static(StaticDef)

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(Allocation)

The alloc ID points to memory.

Implementations§

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impl GlobalAlloc

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pub fn vtable_allocation(&self) -> Option<AllocId>

Retrieve the allocation id for a global allocation if it exists.

For [GlobalAlloc::VTable], this will return the allocation for the VTable of the given type for the optional trait if the type implements the trait.

This method will always return None for allocations other than [GlobalAlloc::VTable].

Trait Implementations§

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impl Clone for GlobalAlloc

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fn clone(&self) -> GlobalAlloc

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 Debug for GlobalAlloc

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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 From<AllocId> for GlobalAlloc

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fn from(value: AllocId) -> Self

Converts to this type from the input type.
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impl PartialEq for GlobalAlloc

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

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Serialize for GlobalAlloc

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl Eq for GlobalAlloc

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impl StructuralPartialEq for GlobalAlloc

Auto Trait Implementations§

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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. 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, 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> ToOwned for T
where 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<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, 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.

Layout§

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: 72 bytes

Size for each variant:

  • Function: 24 bytes
  • VTable: 64 bytes
  • Static: 8 bytes
  • Memory: 64 bytes