Use extension trait derive

4 files changed, 7 insertions, 33 deletions

diff --git a/compiler/rustc_trait_selection/src/solve/eval_ctxt/mod.rs b/compiler/rustc_trait_selection/src/solve/eval_ctxt/mod.rs
index 803379af005..3abdc4a3330 100644
--- a/compiler/rustc_trait_selection/src/solve/eval_ctxt/mod.rs
+++ b/compiler/rustc_trait_selection/src/solve/eval_ctxt/mod.rs
@@ -131,22 +131,12 @@ pub enum GenerateProofTree {
     Never,
 }
 
-pub trait InferCtxtEvalExt<'tcx> {
+#[extension]
+pub impl<'tcx> InferCtxtEvalExt<'tcx> for InferCtxt<'tcx> {
     /// Evaluates a goal from **outside** of the trait solver.
     ///
     /// Using this while inside of the solver is wrong as it uses a new
     /// search graph which would break cycle detection.
-    fn evaluate_root_goal(
-        &self,
-        goal: Goal<'tcx, ty::Predicate<'tcx>>,
-        generate_proof_tree: GenerateProofTree,
-    ) -> (
-        Result<(bool, Certainty, Vec<Goal<'tcx, ty::Predicate<'tcx>>>), NoSolution>,
-        Option<inspect::GoalEvaluation<'tcx>>,
-    );
-}
-
-impl<'tcx> InferCtxtEvalExt<'tcx> for InferCtxt<'tcx> {
     #[instrument(level = "debug", skip(self))]
     fn evaluate_root_goal(
         &self,
diff --git a/compiler/rustc_trait_selection/src/solve/eval_ctxt/select.rs b/compiler/rustc_trait_selection/src/solve/eval_ctxt/select.rs
index eab59624436..406f4c2f615 100644
--- a/compiler/rustc_trait_selection/src/solve/eval_ctxt/select.rs
+++ b/compiler/rustc_trait_selection/src/solve/eval_ctxt/select.rs
@@ -17,14 +17,8 @@ use crate::solve::inspect::ProofTreeBuilder;
 use crate::traits::StructurallyNormalizeExt;
 use crate::traits::TraitEngineExt;
 
-pub trait InferCtxtSelectExt<'tcx> {
-    fn select_in_new_trait_solver(
-        &self,
-        obligation: &PolyTraitObligation<'tcx>,
-    ) -> SelectionResult<'tcx, Selection<'tcx>>;
-}
-
-impl<'tcx> InferCtxtSelectExt<'tcx> for InferCtxt<'tcx> {
+#[extension]
+pub impl<'tcx> InferCtxtSelectExt<'tcx> for InferCtxt<'tcx> {
     fn select_in_new_trait_solver(
         &self,
         obligation: &PolyTraitObligation<'tcx>,
diff --git a/compiler/rustc_trait_selection/src/solve/inspect/analyse.rs b/compiler/rustc_trait_selection/src/solve/inspect/analyse.rs
index f33d0f397ce..1c6c2ff594a 100644
--- a/compiler/rustc_trait_selection/src/solve/inspect/analyse.rs
+++ b/compiler/rustc_trait_selection/src/solve/inspect/analyse.rs
@@ -216,15 +216,8 @@ pub trait ProofTreeVisitor<'tcx> {
     fn visit_goal(&mut self, goal: &InspectGoal<'_, 'tcx>) -> ControlFlow<Self::BreakTy>;
 }
 
-pub trait ProofTreeInferCtxtExt<'tcx> {
-    fn visit_proof_tree<V: ProofTreeVisitor<'tcx>>(
-        &self,
-        goal: Goal<'tcx, ty::Predicate<'tcx>>,
-        visitor: &mut V,
-    ) -> ControlFlow<V::BreakTy>;
-}
-
-impl<'tcx> ProofTreeInferCtxtExt<'tcx> for InferCtxt<'tcx> {
+#[extension]
+pub impl<'tcx> ProofTreeInferCtxtExt<'tcx> for InferCtxt<'tcx> {
     fn visit_proof_tree<V: ProofTreeVisitor<'tcx>>(
         &self,
         goal: Goal<'tcx, ty::Predicate<'tcx>>,
diff --git a/compiler/rustc_trait_selection/src/solve/mod.rs b/compiler/rustc_trait_selection/src/solve/mod.rs
index 94a3cef8ad1..11e1e72e04e 100644
--- a/compiler/rustc_trait_selection/src/solve/mod.rs
+++ b/compiler/rustc_trait_selection/src/solve/mod.rs
@@ -61,10 +61,7 @@ enum GoalEvaluationKind {
     Nested { is_normalizes_to_hack: IsNormalizesToHack },
 }
 
-trait CanonicalResponseExt {
-    fn has_no_inference_or_external_constraints(&self) -> bool;
-}
-
+#[extension]
 impl<'tcx> CanonicalResponseExt for Canonical<'tcx, Response<'tcx>> {
     fn has_no_inference_or_external_constraints(&self) -> bool {
         self.value.external_constraints.region_constraints.is_empty()