src/librustc_trait_selection/traits/engine.rs

   1 use rustc_middle::ty::TyCtxt;
   2
   3 use super::TraitEngine;
   4 use super::{ChalkFulfillmentContext, FulfillmentContext};
   5
   6 pub trait TraitEngineExt<'tcx> {
   7     fn new(tcx: TyCtxt<'tcx>) -> Box<Self>;
   8 }
   9
  10 impl<'tcx> TraitEngineExt<'tcx> for dyn TraitEngine<'tcx> {
  11     fn new(tcx: TyCtxt<'tcx>) -> Box<Self> {
  12         if tcx.sess.opts.debugging_opts.chalk {
  13             Box::new(ChalkFulfillmentContext::new())
  14         } else {
  15             Box::new(FulfillmentContext::new())
  16         }
  17     }
  18 }