rustc_trait_selection/traits/query/type_op/
outlives.rs

1use rustc_middle::traits::query::{DropckOutlivesResult, NoSolution};
2use rustc_middle::ty::{ParamEnvAnd, TyCtxt};
3use rustc_span::Span;
4
5use crate::infer::canonical::{CanonicalQueryInput, CanonicalQueryResponse};
6use crate::traits::ObligationCtxt;
7use crate::traits::query::dropck_outlives::{
8    compute_dropck_outlives_inner, trivial_dropck_outlives,
9};
10use crate::traits::query::type_op::DropckOutlives;
11
12impl<'tcx> super::QueryTypeOp<'tcx> for DropckOutlives<'tcx> {
13    type QueryResponse = DropckOutlivesResult<'tcx>;
14
15    fn try_fast_path(
16        tcx: TyCtxt<'tcx>,
17        key: &ParamEnvAnd<'tcx, Self>,
18    ) -> Option<Self::QueryResponse> {
19        trivial_dropck_outlives(tcx, key.value.dropped_ty).then(DropckOutlivesResult::default)
20    }
21
22    fn perform_query(
23        tcx: TyCtxt<'tcx>,
24        canonicalized: CanonicalQueryInput<'tcx, ParamEnvAnd<'tcx, Self>>,
25    ) -> Result<CanonicalQueryResponse<'tcx, Self::QueryResponse>, NoSolution> {
26        tcx.dropck_outlives(canonicalized)
27    }
28
29    fn perform_locally_with_next_solver(
30        ocx: &ObligationCtxt<'_, 'tcx>,
31        key: ParamEnvAnd<'tcx, Self>,
32        span: Span,
33    ) -> Result<Self::QueryResponse, NoSolution> {
34        compute_dropck_outlives_inner(ocx, key.param_env.and(key.value), span)
35    }
36}