Struct rustc_middle::ty::util::OpaqueTypeExpander

struct OpaqueTypeExpander<'tcx> {
    seen_opaque_tys: FxHashSet<DefId>,
    expanded_cache: FxHashMap<(DefId, SubstsRef<'tcx>), Ty<'tcx>>,
    primary_def_id: Option<DefId>,
    found_recursion: bool,
    found_any_recursion: bool,
    check_recursion: bool,
    tcx: TyCtxt<'tcx>,
}

Fields

seen_opaque_tys: FxHashSet<DefId>

expanded_cache: FxHashMap<(DefId, SubstsRef<'tcx>), Ty<'tcx>>

primary_def_id: Option<DefId>

found_recursion: bool

found_any_recursion: bool

check_recursion: bool

Whether or not to check for recursive opaque types. This is true when we’re explicitly checking for opaque type recursion, and ‘false’ otherwise to avoid unnecessary work.

tcx: TyCtxt<'tcx>

Implementations

impl<'tcx> OpaqueTypeExpander<'tcx>

fn expand_opaque_ty(
    &mut self,
    def_id: DefId,
    substs: SubstsRef<'tcx>
) -> Option<Ty<'tcx>>

Trait Implementations

impl<'tcx> TypeFolder<'tcx> for OpaqueTypeExpander<'tcx>

fn tcx(&self) -> TyCtxt<'tcx>

fn fold_ty(&mut self, t: Ty<'tcx>) -> Ty<'tcx>

type Error = !

fn fold_binder<T>(&mut self, t: Binder<'tcx, T>) -> Binder<'tcx, T> where
    T: TypeFoldable<'tcx>,
    Self: TypeFolder<'tcx, Error = !>, 

fn fold_region(&mut self, r: Region<'tcx>) -> Region<'tcx> where
    Self: TypeFolder<'tcx, Error = !>, 

fn fold_const(&mut self, c: &'tcx Const<'tcx>) -> &'tcx Const<'tcx> where
    Self: TypeFolder<'tcx, Error = !>, 

fn fold_predicate(&mut self, p: Predicate<'tcx>) -> Predicate<'tcx> where
    Self: TypeFolder<'tcx, Error = !>, 

fn fold_mir_const(&mut self, c: ConstantKind<'tcx>) -> ConstantKind<'tcx> where
    Self: TypeFolder<'tcx, Error = !>, 

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: 88 bytes