Struct PlaceTy

pub struct PlaceTy<'tcx> {
    pub ty: Ty<'tcx>,
    pub variant_index: Option<VariantIdx>,
}

Fields

ty: Ty<'tcx>

variant_index: Option<VariantIdx>

Downcast to a particular variant of an enum or a coroutine, if included.

Implementations

impl<'tcx> PlaceTy<'tcx>

pub fn from_ty(ty: Ty<'tcx>) -> PlaceTy<'tcx>

pub fn field_ty(self, tcx: TyCtxt<'tcx>, f: FieldIdx) -> Ty<'tcx>

place_ty.field_ty(tcx, f) computes the type at a given field of a record or enum-variant. (Most clients of PlaceTy can instead just extract the relevant type directly from their PlaceElem, but some instances of ProjectionElem<V, T> do not carry a Ty for T.)

Note that the resulting type has not been normalized.

pub fn projection_ty( self, tcx: TyCtxt<'tcx>, elem: PlaceElem<'tcx>, ) -> PlaceTy<'tcx>

Convenience wrapper around projection_ty_core for PlaceElem, where we can just use the Ty that is already stored inline on field projection elems.

pub fn projection_ty_core<V, T>( self, tcx: TyCtxt<'tcx>, param_env: ParamEnv<'tcx>, elem: &ProjectionElem<V, T>, handle_field: impl FnMut(&Self, FieldIdx, T) -> Ty<'tcx>, handle_opaque_cast_and_subtype: impl FnMut(&Self, T) -> Ty<'tcx>, ) -> PlaceTy<'tcx>

where V: Debug, T: Debug + Copy,

place_ty.projection_ty_core(tcx, elem, |...| { ... }) projects place_ty onto elem, returning the appropriate Ty or downcast variant corresponding to that projection. The handle_field callback must map a FieldIdx to its Ty, (which should be trivial when T = Ty).

Trait Implementations

impl<'tcx> Clone for PlaceTy<'tcx>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> Debug for PlaceTy<'tcx>

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

Formats the value using the given formatter.

impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for PlaceTy<'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) -> Self

where 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 PlaceTy<'tcx>

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

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

impl<'tcx> Copy for PlaceTy<'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