Move trait into attr so it's greppable

compiler/rustc_trait_selection/src/infer.rs

@@ -17,8 +17,8 @@ use std::fmt::Debug;
 
 pub use rustc_infer::infer::*;
 
-#[extension]
-pub impl<'tcx> InferCtxtExt<'tcx> for InferCtxt<'tcx> {
+#[extension(pub trait InferCtxtExt<'tcx>)]
+impl<'tcx> InferCtxt<'tcx> {
     fn type_is_copy_modulo_regions(&self, param_env: ty::ParamEnv<'tcx>, ty: Ty<'tcx>) -> bool {
         let ty = self.resolve_vars_if_possible(ty);
 
@@ -105,8 +105,8 @@ pub impl<'tcx> InferCtxtExt<'tcx> for InferCtxt<'tcx> {
     }
 }
 
-#[extension]
-pub impl<'tcx> InferCtxtBuilderExt<'tcx> for InferCtxtBuilder<'tcx> {
+#[extension(pub trait InferCtxtBuilderExt<'tcx>)]
+impl<'tcx> InferCtxtBuilder<'tcx> {
     /// The "main method" for a canonicalized trait query. Given the
     /// canonical key `canonical_key`, this method will create a new
     /// inference context, instantiate the key, and run your operation

compiler/rustc_trait_selection/src/regions.rs

@@ -3,8 +3,8 @@ use rustc_infer::infer::{InferCtxt, RegionResolutionError};
 use rustc_middle::traits::query::NoSolution;
 use rustc_middle::traits::ObligationCause;
 
-#[extension]
-pub impl<'tcx> InferCtxtRegionExt<'tcx> for InferCtxt<'tcx> {
+#[extension(pub trait InferCtxtRegionExt<'tcx>)]
+impl<'tcx> InferCtxt<'tcx> {
     /// Resolve regions, using the deep normalizer to normalize any type-outlives
     /// obligations in the process. This is in `rustc_trait_selection` because
     /// we need to normalize.

compiler/rustc_trait_selection/src/solve/eval_ctxt/mod.rs

@@ -131,8 +131,8 @@ pub enum GenerateProofTree {
     Never,
 }
 
-#[extension]
-pub impl<'tcx> InferCtxtEvalExt<'tcx> for InferCtxt<'tcx> {
+#[extension(pub trait InferCtxtEvalExt<'tcx>)]
+impl<'tcx> 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

compiler/rustc_trait_selection/src/solve/eval_ctxt/select.rs

@@ -17,8 +17,8 @@ use crate::solve::inspect::ProofTreeBuilder;
 use crate::traits::StructurallyNormalizeExt;
 use crate::traits::TraitEngineExt;
 
-#[extension]
-pub impl<'tcx> InferCtxtSelectExt<'tcx> for InferCtxt<'tcx> {
+#[extension(pub trait InferCtxtSelectExt<'tcx>)]
+impl<'tcx> InferCtxt<'tcx> {
     fn select_in_new_trait_solver(
         &self,
         obligation: &PolyTraitObligation<'tcx>,

compiler/rustc_trait_selection/src/solve/inspect/analyse.rs

@@ -216,8 +216,8 @@ pub trait ProofTreeVisitor<'tcx> {
     fn visit_goal(&mut self, goal: &InspectGoal<'_, 'tcx>) -> ControlFlow<Self::BreakTy>;
 }
 
-#[extension]
-pub impl<'tcx> ProofTreeInferCtxtExt<'tcx> for InferCtxt<'tcx> {
+#[extension(pub trait ProofTreeInferCtxtExt<'tcx>)]
+impl<'tcx> InferCtxt<'tcx> {
     fn visit_proof_tree<V: ProofTreeVisitor<'tcx>>(
         &self,
         goal: Goal<'tcx, ty::Predicate<'tcx>>,

compiler/rustc_trait_selection/src/solve/mod.rs

@@ -61,8 +61,8 @@ enum GoalEvaluationKind {
     Nested { is_normalizes_to_hack: IsNormalizesToHack },
 }
 
-#[extension]
-impl<'tcx> CanonicalResponseExt for Canonical<'tcx, Response<'tcx>> {
+#[extension(trait CanonicalResponseExt)]
+impl<'tcx> Canonical<'tcx, Response<'tcx>> {
     fn has_no_inference_or_external_constraints(&self) -> bool {
         self.value.external_constraints.region_constraints.is_empty()
             && self.value.var_values.is_identity()

compiler/rustc_trait_selection/src/traits/engine.rs

@@ -27,8 +27,8 @@ use rustc_middle::ty::TypeFoldable;
 use rustc_middle::ty::Variance;
 use rustc_middle::ty::{self, Ty, TyCtxt};
 
-#[extension]
-pub impl<'tcx> TraitEngineExt<'tcx> for dyn TraitEngine<'tcx> {
+#[extension(pub trait TraitEngineExt<'tcx>)]
+impl<'tcx> dyn TraitEngine<'tcx> {
     fn new(infcx: &InferCtxt<'tcx>) -> Box<Self> {
         if infcx.next_trait_solver() {
             Box::new(NextFulfillmentCtxt::new(infcx))

compiler/rustc_trait_selection/src/traits/error_reporting/infer_ctxt_ext.rs

@@ -11,8 +11,8 @@ use super::ArgKind;
 
 pub use rustc_infer::traits::error_reporting::*;
 
-#[extension]
-pub impl<'tcx> InferCtxtExt<'tcx> for InferCtxt<'tcx> {
+#[extension(pub trait InferCtxtExt<'tcx>)]
+impl<'tcx> InferCtxt<'tcx> {
     /// Given some node representing a fn-like thing in the HIR map,
     /// returns a span and `ArgKind` information that describes the
     /// arguments it expects. This can be supplied to

compiler/rustc_trait_selection/src/traits/error_reporting/on_unimplemented.rs

@@ -38,8 +38,8 @@ static ALLOWED_FORMAT_SYMBOLS: &[Symbol] = &[
     sym::Trait,
 ];
 
-#[extension]
-pub impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
+#[extension(pub trait TypeErrCtxtExt<'tcx>)]
+impl<'tcx> TypeErrCtxt<'_, 'tcx> {
     fn impl_similar_to(
         &self,
         trait_ref: ty::PolyTraitRef<'tcx>,

compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs

@@ -236,8 +236,8 @@ pub fn suggest_restriction<'tcx>(
     }
 }
 
-#[extension]
-pub impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
+#[extension(pub trait TypeErrCtxtExt<'tcx>)]
+impl<'tcx> TypeErrCtxt<'_, 'tcx> {
     fn suggest_restricting_param_bound(
         &self,
         err: &mut Diagnostic,

compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs

@@ -57,8 +57,8 @@ use super::{
 
 pub use rustc_infer::traits::error_reporting::*;
 
-#[extension]
-pub impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
+#[extension(pub trait TypeErrCtxtExt<'tcx>)]
+impl<'tcx> TypeErrCtxt<'_, 'tcx> {
     fn report_fulfillment_errors(
         &self,
         mut errors: Vec<FulfillmentError<'tcx>>,
@@ -1326,8 +1326,8 @@ pub impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
     }
 }
 
-#[extension]
-pub(super) impl<'tcx> InferCtxtPrivExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
+#[extension(pub(super) trait InferCtxtPrivExt<'tcx>)]
+impl<'tcx> TypeErrCtxt<'_, 'tcx> {
     // returns if `cond` not occurring implies that `error` does not occur - i.e., that
     // `error` occurring implies that `cond` occurs.
     fn error_implies(&self, cond: ty::Predicate<'tcx>, error: ty::Predicate<'tcx>) -> bool {

compiler/rustc_trait_selection/src/traits/outlives_bounds.rs

@@ -111,8 +111,8 @@ fn implied_outlives_bounds<'a, 'tcx>(
     bounds
 }
 
-#[extension]
-pub impl<'a, 'tcx: 'a> InferCtxtExt<'a, 'tcx> for InferCtxt<'tcx> {
+#[extension(pub trait InferCtxtExt<'a, 'tcx>)]
+impl<'a, 'tcx: 'a> InferCtxt<'tcx> {
     /// Do *NOT* call this directly.
     fn implied_bounds_tys_compat(
         &'a self,

compiler/rustc_trait_selection/src/traits/project.rs

@@ -52,8 +52,8 @@ pub type ProjectionTyObligation<'tcx> = Obligation<'tcx, ty::AliasTy<'tcx>>;
 
 pub(super) struct InProgress;
 
-#[extension]
-pub impl<'tcx> NormalizeExt<'tcx> for At<'_, 'tcx> {
+#[extension(pub trait NormalizeExt<'tcx>)]
+impl<'tcx> At<'_, 'tcx> {
     /// Normalize a value using the `AssocTypeNormalizer`.
     ///
     /// This normalization should be used when the type contains inference variables or the

compiler/rustc_trait_selection/src/traits/query/evaluate_obligation.rs

@@ -4,8 +4,8 @@ use crate::infer::canonical::OriginalQueryValues;
 use crate::infer::InferCtxt;
 use crate::traits::{EvaluationResult, OverflowError, PredicateObligation, SelectionContext};
 
-#[extension]
-pub impl<'tcx> InferCtxtExt<'tcx> for InferCtxt<'tcx> {
+#[extension(pub trait InferCtxtExt<'tcx>)]
+impl<'tcx> InferCtxt<'tcx> {
     /// Evaluates whether the predicate can be satisfied (by any means)
     /// in the given `ParamEnv`.
     fn predicate_may_hold(&self, obligation: &PredicateObligation<'tcx>) -> bool {

compiler/rustc_trait_selection/src/traits/query/normalize.rs

@@ -22,8 +22,8 @@ use super::NoSolution;
 
 pub use rustc_middle::traits::query::NormalizationResult;
 
-#[extension]
-pub impl<'cx, 'tcx> QueryNormalizeExt<'tcx> for At<'cx, 'tcx> {
+#[extension(pub trait QueryNormalizeExt<'tcx>)]
+impl<'cx, 'tcx> At<'cx, 'tcx> {
     /// Normalize `value` in the context of the inference context,
     /// yielding a resulting type, or an error if `value` cannot be
     /// normalized. If you don't care about regions, you should prefer

compiler/rustc_trait_selection/src/traits/specialize/specialization_graph.rs

@@ -33,8 +33,8 @@ enum Inserted<'tcx> {
     ShouldRecurseOn(DefId),
 }
 
-#[extension]
-impl<'tcx> ChildrenExt<'tcx> for Children {
+#[extension(trait ChildrenExt<'tcx>)]
+impl<'tcx> Children {
     /// Insert an impl into this set of children without comparing to any existing impls.
     fn insert_blindly(&mut self, tcx: TyCtxt<'tcx>, impl_def_id: DefId) {
         let trait_ref = tcx.impl_trait_ref(impl_def_id).unwrap().skip_binder();
@@ -235,8 +235,8 @@ where
     }
 }
 
-#[extension]
-pub impl<'tcx> GraphExt<'tcx> for Graph {
+#[extension(pub trait GraphExt<'tcx>)]
+impl<'tcx> Graph {
     /// Insert a local impl into the specialization graph. If an existing impl
     /// conflicts with it (has overlap, but neither specializes the other),
     /// information about the area of overlap is returned in the `Err`.

compiler/rustc_trait_selection/src/traits/structural_normalize.rs

@@ -5,8 +5,8 @@ use rustc_middle::ty::{self, Ty};
 
 use crate::traits::{NormalizeExt, Obligation};
 
-#[extension]
-pub impl<'tcx> StructurallyNormalizeExt<'tcx> for At<'_, 'tcx> {
+#[extension(pub trait StructurallyNormalizeExt<'tcx>)]
+impl<'tcx> At<'_, 'tcx> {
     fn structurally_normalize(
         &self,
         ty: Ty<'tcx>,