Struct rustc_middle::ty::adt::AdtDefData

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pub struct AdtDefData {
    pub did: DefId,
    variants: IndexVec<VariantIdx, VariantDef>,
    flags: AdtFlags,
    repr: ReprOptions,
}
Expand description

The definition of a user-defined type, e.g., a struct, enum, or union.

These are all interned (by alloc_adt_def) into the global arena.

The initialism ADT stands for an algebraic data type (ADT). This is slightly wrong because unions are not ADTs. Moreover, Rust only allows recursive data types through indirection.

Recursive types

It may seem impossible to represent recursive types using Ty, since TyKind::Adt includes AdtDef, which includes its fields, creating a cycle. However, AdtDef does not actually include the types of its fields; it includes just their DefIds.

For example, the following type:

struct S { x: Box<S> }

is essentially represented with Ty as the following pseudocode:

struct S { x }

where x here represents the DefId of S.x. Then, the DefId can be used with TyCtxt::type_of() to get the type of the field.

Fields§

§did: DefId

The DefId of the struct, enum or union item.

§variants: IndexVec<VariantIdx, VariantDef>

Variants of the ADT. If this is a struct or union, then there will be a single variant.

§flags: AdtFlags

Flags of the ADT (e.g., is this a struct? is this non-exhaustive?).

§repr: ReprOptions

Repr options provided by the user.

Implementations§

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impl AdtDefData

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pub(super) fn new(
    tcx: TyCtxt<'_>,
    did: DefId,
    kind: AdtKind,
    variants: IndexVec<VariantIdx, VariantDef>,
    repr: ReprOptions
) -> Self

Creates a new AdtDefData.

Trait Implementations§

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impl<'tcx> ArenaAllocatable<'tcx, IsNotCopy> for AdtDefData

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fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut Self

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fn allocate_from_iter<'a>(
    arena: &'a Arena<'tcx>,
    iter: impl IntoIterator<Item = Self>
) -> &'a mut [Self]

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impl<'tcx> Borrow<AdtDefData> for InternedInSet<'tcx, AdtDefData>

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fn borrow<'a>(&'a self) -> &'a AdtDefData

Immutably borrows from an owned value. Read more
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impl<'tcx, __D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<__D> for AdtDefData

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

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

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

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impl Hash for AdtDefData

There should be only one AdtDef for each did, therefore it is fine to implement Hash only based on did.

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fn hash<H: Hasher>(&self, s: &mut H)

Feeds this value into the given Hasher. Read more
1.3.0 · source§

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<'a> HashStable<StableHashingContext<'a>> for AdtDefData

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fn hash_stable(
    &self,
    hcx: &mut StableHashingContext<'a>,
    hasher: &mut StableHasher
)

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impl Ord for AdtDefData

There should be only one AdtDef for each did, therefore it is fine to implement Ord only based on did.

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fn cmp(&self, other: &AdtDefData) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Selfwhere
    Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Selfwhere
    Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Selfwhere
    Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval. Read more
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impl PartialEq<AdtDefData> for AdtDefData

There should be only one AdtDef for each did, therefore it is fine to implement PartialEq only based on did.

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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 ==.
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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 PartialOrd<AdtDefData> for AdtDefData

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fn partial_cmp(&self, other: &AdtDefData) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl<'tcx, D: TyDecoder<I = TyCtxt<'tcx>>> RefDecodable<'tcx, D> for AdtDefData

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impl Eq for AdtDefData

Auto Trait Implementations§

Blanket Implementations§

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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,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere
    T: ?Sized,

const: unstable · source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, R> InternIteratorElement<T, R> for T

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type Output = R

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fn intern_with<I, F>(iter: I, f: F) -> <T as InternIteratorElement<T, R>>::Outputwhere
    I: Iterator<Item = T>,
    F: FnOnce(&[T]) -> R,

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impl<T, U> Into<U> for Twhere
    U: From<T>,

const: unstable · source§

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> 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<'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.
const: unstable · source§

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.
const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<Tcx, T, D> Value<Tcx, D> for Twhere
    Tcx: DepContext,
    D: DepKind,

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default fn from_cycle_error(tcx: Tcx, _: &[QueryInfo<D>]) -> T

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: 56 bytes