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§
Source§impl<'tcx> PlaceTy<'tcx>
impl<'tcx> PlaceTy<'tcx>
pub fn from_ty(ty: Ty<'tcx>) -> PlaceTy<'tcx>
Sourcepub fn field_ty(self, tcx: TyCtxt<'tcx>, f: FieldIdx) -> Ty<'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.
Sourcepub fn projection_ty(
self,
tcx: TyCtxt<'tcx>,
elem: PlaceElem<'tcx>,
) -> PlaceTy<'tcx>
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.
Sourcepub fn projection_ty_core<V, T>(
self,
tcx: TyCtxt<'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>
pub fn projection_ty_core<V, T>( self, tcx: TyCtxt<'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>
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§
Source§impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for PlaceTy<'tcx>
impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for PlaceTy<'tcx>
Source§fn try_fold_with<__F: FallibleTypeFolder<TyCtxt<'tcx>>>(
self,
__folder: &mut __F,
) -> Result<Self, __F::Error>
fn try_fold_with<__F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, __folder: &mut __F, ) -> Result<Self, __F::Error>
Source§fn fold_with<F>(self, folder: &mut F) -> Selfwhere
F: TypeFolder<I>,
fn fold_with<F>(self, folder: &mut F) -> Selfwhere
F: TypeFolder<I>,
try_fold_with
for use with infallible
folders. Do not override this method, to ensure coherence with
try_fold_with
.Source§impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for PlaceTy<'tcx>
impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for PlaceTy<'tcx>
Source§fn visit_with<__V: TypeVisitor<TyCtxt<'tcx>>>(
&self,
__visitor: &mut __V,
) -> __V::Result
fn visit_with<__V: TypeVisitor<TyCtxt<'tcx>>>( &self, __visitor: &mut __V, ) -> __V::Result
impl<'tcx> Copy for PlaceTy<'tcx>
Auto Trait Implementations§
impl<'tcx> DynSend for PlaceTy<'tcx>
impl<'tcx> DynSync for PlaceTy<'tcx>
impl<'tcx> Freeze for PlaceTy<'tcx>
impl<'tcx> !RefUnwindSafe for PlaceTy<'tcx>
impl<'tcx> Send for PlaceTy<'tcx>
impl<'tcx> Sync for PlaceTy<'tcx>
impl<'tcx> Unpin for PlaceTy<'tcx>
impl<'tcx> !UnwindSafe for PlaceTy<'tcx>
Blanket Implementations§
Source§impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T
fn allocate_from_iter( arena: &'tcx Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'tcx mut [T]
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T: Copy,
impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T
fn allocate_from_iter( arena: &'tcx Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'tcx mut [T]
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T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
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fn borrow_mut(&mut self) -> &mut T
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T: Clone,
impl<T> CloneToUninit for Twhere
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unsafe fn clone_to_uninit(&self, dst: *mut T)
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filter_name: &'static str,
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impl<T> Instrument for T
Source§fn instrument(self, span: Span) -> Instrumented<Self>
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impl<T> IntoEither for T
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fn into_either(self, into_left: bool) -> Either<Self, Self>
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into a Left
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Converts self
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if self
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fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool
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true
if this type has regions that are not a part of the type.
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return false
, while fn(&'a i32)
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Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...)
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Size: 16 bytes