Struct rustc_trait_selection::infer::outlives::for_liveness::FreeRegionsVisitor

pub struct FreeRegionsVisitor<'tcx, OP>
where
    OP: FnMut(Region<'tcx>),
{
    pub tcx: TyCtxt<'tcx>,
    pub param_env: ParamEnv<'tcx>,
    pub op: OP,
}

Visits free regions in the type that are relevant for liveness computation. These regions are passed to OP.

Specifically, we visit all of the regions of types recursively, except if the type is an alias, we look at the outlives bounds in the param-env and alias’s item bounds. If there is a unique outlives bound, then visit that instead. If there is not a unique but there is a 'static outlives bound, then don’t visit anything. Otherwise, walk through the opaque’s regions structurally.

Fields

tcx: TyCtxt<'tcx>

param_env: ParamEnv<'tcx>

op: OP

Trait Implementations

impl<'tcx, OP> TypeVisitor<TyCtxt<'tcx>> for FreeRegionsVisitor<'tcx, OP>

where OP: FnMut(Region<'tcx>),

fn visit_binder<T>(&mut self, t: &Binder<TyCtxt<'tcx>, T>)

where T: TypeVisitable<TyCtxt<'tcx>>,

fn visit_region(&mut self, r: Region<'tcx>)

fn visit_ty(&mut self, ty: Ty<'tcx>)

type Result = ()

fn visit_const(&mut self, c: <I as Interner>::Const) -> Self::Result

fn visit_predicate(&mut self, p: <I as Interner>::Predicate) -> Self::Result

fn visit_clauses(&mut self, p: <I as Interner>::Clauses) -> Self::Result

fn visit_error( &mut self, _guar: <I as Interner>::ErrorGuaranteed, ) -> Self::Result

Layout

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.