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use infer::canonical::{Canonical, Canonicalized, CanonicalizedQueryResult, QueryResult};
use traits::query::outlives_bounds::OutlivesBound;
use traits::query::Fallible;
use ty::{ParamEnvAnd, Ty, TyCtxt};
#[derive(Copy, Clone, Debug, Hash, PartialEq, Eq)]
pub struct ImpliedOutlivesBounds<'tcx> {
pub ty: Ty<'tcx>,
}
impl<'tcx> ImpliedOutlivesBounds<'tcx> {
pub fn new(ty: Ty<'tcx>) -> Self {
ImpliedOutlivesBounds { ty }
}
}
impl<'gcx: 'tcx, 'tcx> super::QueryTypeOp<'gcx, 'tcx> for ImpliedOutlivesBounds<'tcx> {
type QueryResult = Vec<OutlivesBound<'tcx>>;
fn try_fast_path(
_tcx: TyCtxt<'_, 'gcx, 'tcx>,
_key: &ParamEnvAnd<'tcx, Self>,
) -> Option<Self::QueryResult> {
None
}
fn perform_query(
tcx: TyCtxt<'_, 'gcx, 'tcx>,
canonicalized: Canonicalized<'gcx, ParamEnvAnd<'tcx, Self>>,
) -> Fallible<CanonicalizedQueryResult<'gcx, Self::QueryResult>> {
let Canonical {
variables,
value:
ParamEnvAnd {
param_env,
value: ImpliedOutlivesBounds { ty },
},
} = canonicalized;
let canonicalized = Canonical {
variables,
value: param_env.and(ty),
};
tcx.implied_outlives_bounds(canonicalized)
}
fn shrink_to_tcx_lifetime(
v: &'a CanonicalizedQueryResult<'gcx, Self::QueryResult>,
) -> &'a Canonical<'tcx, QueryResult<'tcx, Self::QueryResult>> {
v
}
}
BraceStructTypeFoldableImpl! {
impl<'tcx> TypeFoldable<'tcx> for ImpliedOutlivesBounds<'tcx> {
ty,
}
}
BraceStructLiftImpl! {
impl<'a, 'tcx> Lift<'tcx> for ImpliedOutlivesBounds<'a> {
type Lifted = ImpliedOutlivesBounds<'tcx>;
ty,
}
}
impl_stable_hash_for! {
struct ImpliedOutlivesBounds<'tcx> { ty }
}