# Enum rustc_codegen_llvm::debuginfo::metadata::type_map::UniqueTypeId

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    pub(super) enum UniqueTypeId<'tcx> {
        Ty(Ty<'tcx>, HiddenZst),
        VariantPart(Ty<'tcx>, HiddenZst),
        VariantStructType(Ty<'tcx>, VariantIdx, HiddenZst),
        VariantStructTypeCppLikeWrapper(Ty<'tcx>, VariantIdx, HiddenZst),
        VTableTy(Ty<'tcx>, Option<PolyExistentialTraitRef<'tcx>>, HiddenZst),
    }

Expand description

A unique identifier for anything that we create a debuginfo node for. The types it contains are expected to already be normalized (which is debug_asserted in the constructors).

Note that there are some things that only show up in debuginfo, like the separate type descriptions for each enum variant. These get an ID too because they have their own debuginfo node in LLVM IR.

## Variants§

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### Ty(Ty<'tcx>, HiddenZst)

The ID of a regular type as it shows up at the language level.

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### VariantPart(Ty<'tcx>, HiddenZst)

The ID for the single DW_TAG_variant_part nested inside the top-level DW_TAG_structure_type that describes enums and coroutines.

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### VariantStructType(Ty<'tcx>, VariantIdx, HiddenZst)

The ID for the artificial struct type describing a single enum variant.

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### VariantStructTypeCppLikeWrapper(Ty<'tcx>, VariantIdx, HiddenZst)

The ID for the additional wrapper struct type describing an enum variant in CPP-like mode.

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### VTableTy(Ty<'tcx>, Option<PolyExistentialTraitRef<'tcx>>, HiddenZst)

The ID of the artificial type we create for VTables.

## Implementations§

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### impl<'tcx> UniqueTypeId<'tcx>

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#### pub fn for_ty(tcx: TyCtxt<'tcx>, t: Ty<'tcx>) -> Self

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#### pub fn for_enum_variant_part(tcx: TyCtxt<'tcx>, enum_ty: Ty<'tcx>) -> Self

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#### pub fn for_enum_variant_struct_type( tcx: TyCtxt<'tcx>, enum_ty: Ty<'tcx>, variant_idx: VariantIdx ) -> Self

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#### pub fn for_enum_variant_struct_type_wrapper( tcx: TyCtxt<'tcx>, enum_ty: Ty<'tcx>, variant_idx: VariantIdx ) -> Self

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#### pub fn for_vtable_ty( tcx: TyCtxt<'tcx>, self_type: Ty<'tcx>, implemented_trait: Option<PolyExistentialTraitRef<'tcx>> ) -> Self

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#### pub fn generate_unique_id_string(self, tcx: TyCtxt<'tcx>) -> String

Generates a string version of this UniqueTypeId, which can be used as the `UniqueId` argument of the various `LLVMRustDIBuilderCreate*Type()` methods.

Right now this takes the form of a hex-encoded opaque hash value.

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#### pub fn expect_ty(self) -> Ty<'tcx>

## Trait Implementations§

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### impl<'tcx> Clone for UniqueTypeId<'tcx>

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#### fn clone(&self) -> UniqueTypeId<'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 UniqueTypeId<'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> Hash for UniqueTypeId<'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 UniqueTypeId<'tcx>

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

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### impl<'tcx> PartialEq for UniqueTypeId<'tcx>

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#### fn eq(&self, other: &UniqueTypeId<'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> Copy for UniqueTypeId<'tcx>

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### impl<'tcx> Eq for UniqueTypeId<'tcx>

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### impl<'tcx> StructuralPartialEq for UniqueTypeId<'tcx>

## Auto Trait Implementations§

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### impl<'tcx> DynSend for UniqueTypeId<'tcx>

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### impl<'tcx> DynSync for UniqueTypeId<'tcx>

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### impl<'tcx> Freeze for UniqueTypeId<'tcx>

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### impl<'tcx> !RefUnwindSafe for UniqueTypeId<'tcx>

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### impl<'tcx> Send for UniqueTypeId<'tcx>

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### impl<'tcx> Sync for UniqueTypeId<'tcx>

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### impl<'tcx> Unpin for UniqueTypeId<'tcx>

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### impl<'tcx> !UnwindSafe for UniqueTypeId<'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 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> AnyEq for T
where T: Any + PartialEq,

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#### fn equals(&self, other: &(dyn Any + 'static)) -> bool

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#### fn as_any(&self) -> &(dyn Any + 'static)

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### impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
where T: Copy,

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#### fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut T

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#### fn allocate_from_iter<'a>( arena: &'a Arena<'tcx>, iter: impl IntoIterator<Item = T> ) -> &'a mut [T]

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### impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
where T: Copy,

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#### fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut T

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#### fn allocate_from_iter<'a>( arena: &'a Arena<'tcx>, iter: impl IntoIterator<Item = T> ) -> &'a mut [T]

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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, R> CollectAndApply<T, R> for T

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#### fn collect_and_apply<I, F>(iter: I, f: F) -> R
where 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 T
where 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 `DepNode`s 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<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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#### fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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### impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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#### fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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### impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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#### fn equivalent(&self, key: &K) -> bool

Compare self to `key` and return `true` if they are equal.
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### impl<T> Filterable for T

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#### fn filterable( self, filter_name: &'static str ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

Creates a filterable data provider with the given name for debugging. 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> Instrument for T

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#### fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided `Span`, returning an `Instrumented` wrapper. Read more
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#### fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current `Span`, returning an `Instrumented` wrapper. Read more
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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<P> IntoQueryParam<P> for P

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#### fn into_query_param(self) -> 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> Pointable for T

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#### const ALIGN: usize = _

The alignment of pointer.
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#### type Init = T

The type for initializers.
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#### unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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#### unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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#### unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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#### unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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### impl<T> Same for T

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#### type Output = T

Should always be `Self`
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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<'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 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.
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### impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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#### fn vzip(self) -> V

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### impl<Tcx, T> Value<Tcx> for T
where Tcx: DepContext,

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#### default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed ) -> T

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### impl<T> WithSubscriber for T

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#### fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more
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#### fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more
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### impl<'a, T> Captures<'a> for T
where T: ?Sized,

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### impl<T> CodegenObject for T
where T: Copy + PartialEq + Debug,

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### impl<T> ErasedDestructor for T
where T: 'static,

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### impl<T> MaybeSendSync for T
where T: Send + Sync,

## 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: 32 bytes

Size for each variant:

- `Ty`: 16 bytes
- `VariantPart`: 16 bytes
- `VariantStructType`: 24 bytes
- `VariantStructTypeCppLikeWrapper`: 24 bytes
- `VTableTy`: 32 bytes