Function check_explicit_predicates

fn check_explicit_predicates<'tcx>(
    tcx: TyCtxt<'tcx>,
    def_id: DefId,
    args: &[GenericArg<'tcx>],
    required_predicates: &mut FxIndexMap<OutlivesPredicate<'tcx, GenericArg<'tcx>>, Span>,
    explicit_map: &mut ExplicitPredicatesMap<'tcx>,
    ignored_self_ty: Option<Ty<'tcx>>,
)

Check the explicit predicates declared on the type.

Example

struct Outer<'a, T> {
    field: Inner<T>,
}

struct Inner<U> where U: 'static, U: Outer {
    // ...
}

Here, we should fetch the explicit predicates, which will give us U: 'static and U: Outer. The latter we can ignore, but we will want to process U: 'static, applying the instantiation as above.