Enum rustc_hir_typeck::cast::PointerKind

enum PointerKind<'tcx> {
    Thin,
    VTable(Option<DefId>),
    Length,
    OfAlias(AliasTy<'tcx>),
    OfParam(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

Length

Slice

OfAlias(AliasTy<'tcx>)

The unsize info of this projection or opaque type

OfParam(ParamTy)

The unsize info of this parameter

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> Debug for PointerKind<'tcx>

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

Formats the value using the given formatter.

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: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for PointerKind<'tcx>

fn try_fold_with<__F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, __folder: &mut __F ) -> Result<Self, __F::Error>

The entry point for folding. To fold a value t with a folder f call: t.try_fold_with(f).

fn fold_with<F>(self, folder: &mut F) -> Selfwhere F: TypeFolder<I>,

A convenient alternative to try_fold_with for use with infallible folders. Do not override this method, to ensure coherence with try_fold_with.

impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for PointerKind<'tcx>

fn visit_with<__V: TypeVisitor<TyCtxt<'tcx>>>( &self, __visitor: &mut __V ) -> ControlFlow<__V::BreakTy>

The entry point for visiting. To visit a value t with a visitor v call: t.visit_with(v).

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: 16 bytes

Size for each variant:

• Thin: 0 bytes
• VTable: 12 bytes
• Length: 0 bytes
• OfAlias: 16 bytes
• OfParam: 12 bytes