src/librustc_trait_selection/traits/query/type_op/ascribe_user_type.rs

   1 use crate::infer::canonical::{Canonicalized, CanonicalizedQueryResponse};
   2 use crate::traits::query::Fallible;
   3 use rustc_middle::ty::{ParamEnvAnd, TyCtxt};
   4
   5 pub use rustc_middle::traits::query::type_op::AscribeUserType;
   6
   7 impl<'tcx> super::QueryTypeOp<'tcx> for AscribeUserType<'tcx> {
   8     type QueryResponse = ();
   9
  10     fn try_fast_path(
  11         _tcx: TyCtxt<'tcx>,
  12         _key: &ParamEnvAnd<'tcx, Self>,
  13     ) -> Option<Self::QueryResponse> {
  14         None
  15     }
  16
  17     fn perform_query(
  18         tcx: TyCtxt<'tcx>,
  19         canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Self>>,
  20     ) -> Fallible<CanonicalizedQueryResponse<'tcx, ()>> {
  21         tcx.type_op_ascribe_user_type(canonicalized)
  22     }
  23 }