Enum AggregateKind

pub enum AggregateKind {
    Adt(TypeId, Option<VariantId>, Option<FieldId>, GenericArgs),
    Array(Ty, ConstGeneric),
    Closure(FunDeclId, GenericArgs),
}

An aggregated ADT.

Note that ADTs are desaggregated at some point in MIR. For instance, if we have in Rust:

  let ls = Cons(hd, tl);

In MIR we have (yes, the discriminant update happens at the end for some reason):

  (ls as Cons).0 = move hd;
  (ls as Cons).1 = move tl;
  discriminant(ls) = 0; // assuming `Cons` is the variant of index 0

Rem.: in the Aeneas semantics, both cases are handled (in case of desaggregated initialization, ls is initialized to ⊥, then this ⊥ is expanded to Cons (⊥, ⊥) upon the first assignment, at which point we can initialize the field 0, etc.).

Variants

Adt(TypeId, Option<VariantId>, Option<FieldId>, GenericArgs)

A struct, enum or union aggregate. The VariantId, if present, indicates this is an enum and the aggregate uses that variant. The FieldId, if present, indicates this is a union and the aggregate writes into that field. Otherwise this is a struct.

Array(Ty, ConstGeneric)

We don’t put this with the ADT cas because this is the only built-in type with aggregates, and it is a primitive type. In particular, it makes sense to treat it differently because it has a variable number of fields.

Closure(FunDeclId, GenericArgs)

Aggregated values for closures group the function id together with its state.

Implementations

impl AggregateKind

pub fn variant_index_arity(&self) -> (u32, usize)

Trait Implementations

impl Clone for AggregateKind

fn clone(&self) -> AggregateKind

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for AggregateKind

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AggregateKind

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Drive for AggregateKind

fn drive<V: Visitor>(&self, visitor: &mut V)

impl DriveMut for AggregateKind

fn drive_mut<V: VisitorMut>(&mut self, visitor: &mut V)

impl Serialize for AggregateKind

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

where __S: Serializer,

Serialize this value into the given Serde serializer.