Enum rustc_typeck::check::cast::PointerKind

enum PointerKind<'tcx> {
    Thin,
    Vtable(Option<DefId>),
    Length,
    OfProjection(&'tcx ProjectionTy<'tcx>),
    OfOpaque(DefId, SubstsRef<'tcx>),
    OfParam(&'tcx ParamTy),
}

The kind of pointer and associated metadata (thin, length or vtable) - we only allow casts between fat pointers if their metadata have the same kind.

Variants

Thin

No metadata attached, ie pointer to sized type or foreign type

Vtable(Option<DefId>)

A trait object

Tuple Fields of Vtable

0: Option<DefId>

Length

Slice

OfProjection(&'tcx ProjectionTy<'tcx>)

The unsize info of this projection

Tuple Fields of OfProjection

0: &'tcx ProjectionTy<'tcx>

OfOpaque(DefId, SubstsRef<'tcx>)

The unsize info of this opaque ty

Tuple Fields of OfOpaque

0: DefId1: SubstsRef<'tcx>

OfParam(&'tcx ParamTy)

The unsize info of this parameter

Tuple Fields of OfParam

0: &'tcx ParamTy

Trait Implementations

impl<'tcx> Clone for PointerKind<'tcx>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> PartialEq<PointerKind<'tcx>> for PointerKind<'tcx>

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

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

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

This method tests for !=.

impl<'tcx> Copy for PointerKind<'tcx>

impl<'tcx> Eq for PointerKind<'tcx>

impl<'tcx> StructuralEq for PointerKind<'tcx>

impl<'tcx> StructuralPartialEq for PointerKind<'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: 24 bytes

Size for each variant:

• Thin: 0 bytes
• Vtable: 8 bytes
• Length: 0 bytes
• OfProjection: 12 bytes
• OfOpaque: 20 bytes
• OfParam: 12 bytes