Enum AggregateKind

pub enum AggregateKind<'tcx> {
    Array(Ty<'tcx>),
    Tuple,
    Adt(DefId, VariantIdx, &'tcx RawList<(), GenericArg<'tcx>>, Option<UserTypeAnnotationIndex>, Option<FieldIdx>),
    Closure(DefId, &'tcx RawList<(), GenericArg<'tcx>>),
    Coroutine(DefId, &'tcx RawList<(), GenericArg<'tcx>>),
    CoroutineClosure(DefId, &'tcx RawList<(), GenericArg<'tcx>>),
    RawPtr(Ty<'tcx>, Mutability),
}

Variants

Array(Ty<'tcx>)

The type is of the element

Tuple

Adt(DefId, VariantIdx, &'tcx RawList<(), GenericArg<'tcx>>, Option<UserTypeAnnotationIndex>, Option<FieldIdx>)

The second field is the variant index. It’s equal to 0 for struct and union expressions. The last field is the active field number and is present only for union expressions – e.g., for a union expression SomeUnion { c: .. }, the active field index would identity the field c

Closure(DefId, &'tcx RawList<(), GenericArg<'tcx>>)

Coroutine(DefId, &'tcx RawList<(), GenericArg<'tcx>>)

CoroutineClosure(DefId, &'tcx RawList<(), GenericArg<'tcx>>)

RawPtr(Ty<'tcx>, Mutability)

Construct a raw pointer from the data pointer and metadata.

The Ty here is the type of the pointee, not the pointer itself. The Mutability indicates whether this produces a *const or *mut.

The Rvalue::Aggregate operands for thus must be

0. A raw pointer of matching mutability with any core::ptr::Thin pointee
1. A value of the appropriate core::ptr::Pointee::Metadata type

Both operands must always be included, even the unit value if this is creating a thin pointer. If you’re just converting between thin pointers, you may want an Rvalue::Cast with CastKind::PtrToPtr instead.