Struct rustc_typeck::check::wfcheck::GATSubstCollector

struct GATSubstCollector<'tcx> {
    tcx: TyCtxt<'tcx>,
    gat: DefId,
    regions: FxHashSet<(Region<'tcx>, usize)>,
    types: FxHashSet<(Ty<'tcx>, usize)>,
}

TypeVisitor that looks for uses of GATs like <P0 as Trait<P1..Pn>>::GAT<Pn..Pm> and adds the arguments P0..Pm into the two vectors, regions and types (depending on their kind). For each parameter Pi also track the index i.

Fields

tcx: TyCtxt<'tcx>

gat: DefId

regions: FxHashSet<(Region<'tcx>, usize)>

types: FxHashSet<(Ty<'tcx>, usize)>

Implementations

impl<'tcx> GATSubstCollector<'tcx>

fn visit<T: TypeFoldable<'tcx>>(
    tcx: TyCtxt<'tcx>,
    gat: DefId,
    t: T
) -> (FxHashSet<(Region<'tcx>, usize)>, FxHashSet<(Ty<'tcx>, usize)>)

Trait Implementations

impl<'tcx> TypeVisitor<'tcx> for GATSubstCollector<'tcx>

type BreakTy = !

fn visit_ty(&mut self, t: Ty<'tcx>) -> ControlFlow<Self::BreakTy>

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

Supplies the tcx for an unevaluated anonymous constant in case its default substs are not yet supplied.

fn visit_binder<T>(
    &mut self,
    t: &Binder<'tcx, T>
) -> ControlFlow<Self::BreakTy, ()> where
    T: TypeFoldable<'tcx>, 

fn visit_region(
    &mut self,
    r: &'tcx RegionKind
) -> ControlFlow<Self::BreakTy, ()>

fn visit_const(
    &mut self,
    c: &'tcx Const<'tcx>
) -> ControlFlow<Self::BreakTy, ()>

fn visit_unevaluated_const(
    &mut self,
    uv: Unevaluated<'tcx, Option<Promoted>>
) -> ControlFlow<Self::BreakTy, ()>

fn visit_predicate(
    &mut self,
    p: Predicate<'tcx>
) -> ControlFlow<Self::BreakTy, ()>

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: 80 bytes