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

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

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

Ty(Ty<'tcx>, HiddenZst)

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

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 generators.

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

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

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

The ID of the artificial type we create for VTables.

Implementations

impl<'tcx> UniqueTypeId<'tcx>

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

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

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

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

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.

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

Trait Implementations

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

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

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'tcx> Debug for UniqueTypeId<'tcx>

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

Formats the value using the given formatter.

impl<'tcx> Hash for UniqueTypeId<'tcx>

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

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl<'tcx, '__ctx> HashStable<StableHashingContext<'__ctx>> for UniqueTypeId<'tcx>

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

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

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

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &UniqueTypeId<'tcx>) -> bool

This method tests for !=.

impl<'tcx> Copy for UniqueTypeId<'tcx>

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

impl<'tcx> StructuralEq for UniqueTypeId<'tcx>

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

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: 40 bytes

Size for each variant:

• Ty: 12 bytes
• VariantPart: 12 bytes
• VariantStructType: 12 bytes
• VTableTy: 36 bytes