Struct rustc::ty::AdtDef
[−]
[src]
pub struct AdtDef { pub did: DefId, pub variants: Vec<VariantDef>, pub repr: ReprOptions, // some fields omitted }
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The definition of an abstract data type - a struct or enum.
These are all interned (by intern_adt_def) into the adt_defs table.
Fields
did: DefId
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variants: Vec<VariantDef>
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repr: ReprOptions
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Methods
impl<'a, 'gcx, 'tcx> AdtDef
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impl<'a, 'gcx, 'tcx> AdtDef
pub fn is_struct(&self) -> bool
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pub fn is_struct(&self) -> bool
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pub fn is_union(&self) -> bool
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pub fn is_union(&self) -> bool
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pub fn is_enum(&self) -> bool
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pub fn is_enum(&self) -> bool
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pub fn is_non_exhaustive(&self) -> bool
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pub fn is_non_exhaustive(&self) -> bool
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pub fn adt_kind(&self) -> AdtKind
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pub fn adt_kind(&self) -> AdtKind
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Returns the kind of the ADT - Struct or Enum.
pub fn descr(&self) -> &'static str
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pub fn descr(&self) -> &'static str
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pub fn variant_descr(&self) -> &'static str
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pub fn variant_descr(&self) -> &'static str
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pub fn is_fundamental(&self) -> bool
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pub fn is_fundamental(&self) -> bool
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Returns whether this type is #[fundamental] for the purposes of coherence checking.
pub fn is_phantom_data(&self) -> bool
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pub fn is_phantom_data(&self) -> bool
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Returns true if this is PhantomData
pub fn is_box(&self) -> bool
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pub fn is_box(&self) -> bool
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Returns true if this is Box
pub fn has_dtor(&self, tcx: TyCtxt<'a, 'gcx, 'tcx>) -> bool
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pub fn has_dtor(&self, tcx: TyCtxt<'a, 'gcx, 'tcx>) -> bool
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Returns whether this type has a destructor.
pub fn non_enum_variant(&self) -> &VariantDef
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pub fn non_enum_variant(&self) -> &VariantDef
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Asserts this is a struct or union and returns its unique variant.
pub fn predicates(&self, tcx: TyCtxt<'a, 'gcx, 'tcx>) -> GenericPredicates<'gcx>
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pub fn predicates(&self, tcx: TyCtxt<'a, 'gcx, 'tcx>) -> GenericPredicates<'gcx>
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pub fn all_fields<'s>(
&'s self
) -> impl Iterator<Item = &'s FieldDef>
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pub fn all_fields<'s>(
&'s self
) -> impl Iterator<Item = &'s FieldDef>
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Returns an iterator over all fields contained by this ADT.
pub fn is_payloadfree(&self) -> bool
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pub fn is_payloadfree(&self) -> bool
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pub fn variant_with_id(&self, vid: DefId) -> &VariantDef
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pub fn variant_with_id(&self, vid: DefId) -> &VariantDef
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pub fn variant_index_with_id(&self, vid: DefId) -> usize
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pub fn variant_index_with_id(&self, vid: DefId) -> usize
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pub fn variant_of_def(&self, def: Def) -> &VariantDef
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pub fn variant_of_def(&self, def: Def) -> &VariantDef
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pub fn eval_explicit_discr(
&self,
tcx: TyCtxt<'a, 'gcx, 'tcx>,
expr_did: DefId
) -> Option<Discr<'tcx>>
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pub fn eval_explicit_discr(
&self,
tcx: TyCtxt<'a, 'gcx, 'tcx>,
expr_did: DefId
) -> Option<Discr<'tcx>>
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pub fn discriminants(
&'a self,
tcx: TyCtxt<'a, 'gcx, 'tcx>
) -> impl Iterator<Item = Discr<'tcx>> + Captures<'gcx> + 'a
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pub fn discriminants(
&'a self,
tcx: TyCtxt<'a, 'gcx, 'tcx>
) -> impl Iterator<Item = Discr<'tcx>> + Captures<'gcx> + 'a
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pub fn discriminant_for_variant(
&self,
tcx: TyCtxt<'a, 'gcx, 'tcx>,
variant_index: usize
) -> Discr<'tcx>
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pub fn discriminant_for_variant(
&self,
tcx: TyCtxt<'a, 'gcx, 'tcx>,
variant_index: usize
) -> Discr<'tcx>
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Compute the discriminant value used by a specific variant.
Unlike discriminants
, this is (amortized) constant-time,
only doing at most one query for evaluating an explicit
discriminant (the last one before the requested variant),
assuming there are no constant-evaluation errors there.
pub fn discriminant_def_for_variant(
&self,
variant_index: usize
) -> (Option<DefId>, usize)
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pub fn discriminant_def_for_variant(
&self,
variant_index: usize
) -> (Option<DefId>, usize)
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Yields a DefId for the discriminant and an offset to add to it Alternatively, if there is no explicit discriminant, returns the inferred discriminant directly
pub fn destructor(&self, tcx: TyCtxt<'a, 'gcx, 'tcx>) -> Option<Destructor>
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pub fn destructor(&self, tcx: TyCtxt<'a, 'gcx, 'tcx>) -> Option<Destructor>
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pub fn sized_constraint(&self, tcx: TyCtxt<'a, 'gcx, 'tcx>) -> &'tcx [Ty<'tcx>]
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pub fn sized_constraint(&self, tcx: TyCtxt<'a, 'gcx, 'tcx>) -> &'tcx [Ty<'tcx>]
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Returns a list of types such that Self: Sized
if and only
if that type is Sized, or TyErr
if this type is recursive.
Oddly enough, checking that the sized-constraint is Sized is actually more expressive than checking all members: the Sized trait is inductive, so an associated type that references Self would prevent its containing ADT from being Sized.
Due to normalization being eager, this applies even if the associated type is behind a pointer, e.g. issue #31299.
Trait Implementations
impl<'tcx> TypeFoldable<'tcx> for &'tcx AdtDef
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impl<'tcx> TypeFoldable<'tcx> for &'tcx AdtDef
AdtDefs are basically the same as a DefId.
fn super_fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(
&self,
_folder: &mut F
) -> Self
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fn super_fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(
&self,
_folder: &mut F
) -> Self
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fn super_visit_with<V: TypeVisitor<'tcx>>(&self, _visitor: &mut V) -> bool
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fn super_visit_with<V: TypeVisitor<'tcx>>(&self, _visitor: &mut V) -> bool
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fn fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(
&self,
folder: &mut F
) -> Self
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fn fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(
&self,
folder: &mut F
) -> Self
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fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool
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fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool
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fn has_regions_escaping_depth(&self, depth: u32) -> bool
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fn has_regions_escaping_depth(&self, depth: u32) -> bool
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fn has_escaping_regions(&self) -> bool
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fn has_escaping_regions(&self) -> bool
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fn has_type_flags(&self, flags: TypeFlags) -> bool
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fn has_type_flags(&self, flags: TypeFlags) -> bool
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fn has_projections(&self) -> bool
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fn has_projections(&self) -> bool
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fn references_error(&self) -> bool
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fn references_error(&self) -> bool
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fn has_param_types(&self) -> bool
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fn has_param_types(&self) -> bool
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fn has_self_ty(&self) -> bool
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fn has_self_ty(&self) -> bool
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fn has_infer_types(&self) -> bool
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fn has_infer_types(&self) -> bool
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fn needs_infer(&self) -> bool
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fn needs_infer(&self) -> bool
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fn needs_subst(&self) -> bool
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fn needs_subst(&self) -> bool
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fn has_re_skol(&self) -> bool
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fn has_re_skol(&self) -> bool
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fn has_closure_types(&self) -> bool
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fn has_closure_types(&self) -> bool
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fn has_free_regions(&self) -> bool
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fn has_free_regions(&self) -> bool
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"Free" regions in this context means that it has any region that is not (a) erased or (b) late-bound. Read more
fn has_erasable_regions(&self) -> bool
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fn has_erasable_regions(&self) -> bool
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True if there any any un-erased free regions.
fn is_normalized_for_trans(&self) -> bool
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fn is_normalized_for_trans(&self) -> bool
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fn is_global(&self) -> bool
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fn is_global(&self) -> bool
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Indicates whether this value references only 'global' types/lifetimes that are the same regardless of what fn we are in. This is used for caching. Errs on the side of returning false. Read more
impl PartialEq for AdtDef
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impl PartialEq for AdtDef
fn eq(&self, other: &Self) -> bool
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fn eq(&self, other: &Self) -> bool
This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, other: &Rhs) -> bool
1.0.0[src]
fn ne(&self, other: &Rhs) -> bool
This method tests for !=
.
impl Eq for AdtDef
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impl Eq for AdtDef
impl Hash for AdtDef
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impl Hash for AdtDef
fn hash<H: Hasher>(&self, s: &mut H)
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fn hash<H: Hasher>(&self, s: &mut H)
Feeds this value into the given [Hasher
]. Read more
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0[src]
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
Feeds a slice of this type into the given [Hasher
]. Read more
impl<'tcx> UseSpecializedEncodable for &'tcx AdtDef
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impl<'tcx> UseSpecializedEncodable for &'tcx AdtDef
fn default_encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error>
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fn default_encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error>
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Defaults to returning an error (see SpecializationError
).
impl<'tcx> UseSpecializedDecodable for &'tcx AdtDef
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impl<'tcx> UseSpecializedDecodable for &'tcx AdtDef
fn default_decode<D>(&mut D) -> Result<Self, <D as Decoder>::Error> where
D: Decoder,
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fn default_decode<D>(&mut D) -> Result<Self, <D as Decoder>::Error> where
D: Decoder,
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Defaults to returning an error (see SpecializationError
).
impl<'a> HashStable<StableHashingContext<'a>> for AdtDef
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impl<'a> HashStable<StableHashingContext<'a>> for AdtDef
fn hash_stable<W: StableHasherResult>(
&self,
hcx: &mut StableHashingContext<'a>,
hasher: &mut StableHasher<W>
)
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fn hash_stable<W: StableHasherResult>(
&self,
hcx: &mut StableHashingContext<'a>,
hasher: &mut StableHasher<W>
)
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impl Debug for AdtDef
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impl Debug for AdtDef