Move trait into attr so it's greppable

Author: compiler-errors

compiler/rustc_ast_lowering/src/lib.rs

@@ -191,8 +191,8 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
     }
 }
 
-#[extension]
-impl ResolverAstLoweringExt for ResolverAstLowering {
+#[extension(trait ResolverAstLoweringExt)]
+impl ResolverAstLowering {
     fn legacy_const_generic_args(&self, expr: &Expr) -> Option<Vec<usize>> {
         if let ExprKind::Path(None, path) = &expr.kind {
             // Don't perform legacy const generics rewriting if the path already

compiler/rustc_borrowck/src/facts.rs

@@ -25,8 +25,8 @@ impl polonius_engine::FactTypes for RustcFacts {
 
 pub type AllFacts = PoloniusFacts<RustcFacts>;
 
-#[extension]
-pub(crate) impl AllFactsExt for AllFacts {
+#[extension(pub(crate) trait AllFactsExt)]
+impl AllFacts {
     /// Returns `true` if there is a need to gather `AllFacts` given the
     /// current `-Z` flags.
     fn enabled(tcx: TyCtxt<'_>) -> bool {

compiler/rustc_borrowck/src/place_ext.rs

@@ -5,8 +5,8 @@ use rustc_middle::mir::ProjectionElem;
 use rustc_middle::mir::{Body, Mutability, Place};
 use rustc_middle::ty::{self, TyCtxt};
 
-#[extension]
-pub impl<'tcx> PlaceExt<'tcx> for Place<'tcx> {
+#[extension(pub trait PlaceExt<'tcx>)]
+impl<'tcx> Place<'tcx> {
     /// Returns `true` if we can safely ignore borrows of this place.
     /// This is true whenever there is no action that the user can do
     /// to the place `self` that would invalidate the borrow. This is true

compiler/rustc_borrowck/src/region_infer/opaque_types.rs

@@ -226,8 +226,8 @@ impl<'tcx> RegionInferenceContext<'tcx> {
     }
 }
 
-#[extension]
-pub impl<'tcx> InferCtxtExt<'tcx> for InferCtxt<'tcx> {
+#[extension(pub trait InferCtxtExt<'tcx>)]
+impl<'tcx> InferCtxt<'tcx> {
     /// Given the fully resolved, instantiated type for an opaque
     /// type, i.e., the value of an inference variable like C1 or C2
     /// (*), computes the "definition type" for an opaque type

compiler/rustc_borrowck/src/universal_regions.rs

@@ -794,8 +794,8 @@ impl<'cx, 'tcx> UniversalRegionsBuilder<'cx, 'tcx> {
     }
 }
 
-#[extension]
-impl<'cx, 'tcx> InferCtxtExt<'tcx> for BorrowckInferCtxt<'cx, 'tcx> {
+#[extension(trait InferCtxtExt<'tcx>)]
+impl<'cx, 'tcx> BorrowckInferCtxt<'cx, 'tcx> {
     #[instrument(skip(self), level = "debug")]
     fn replace_free_regions_with_nll_infer_vars<T>(
         &self,

compiler/rustc_hir_analysis/src/collect/resolve_bound_vars.rs

@@ -28,8 +28,8 @@ use std::fmt;
 
 use crate::errors;
 
-#[extension]
-impl RegionExt for ResolvedArg {
+#[extension(trait RegionExt)]
+impl ResolvedArg {
     fn early(param: &GenericParam<'_>) -> (LocalDefId, ResolvedArg) {
         debug!("ResolvedArg::early: def_id={:?}", param.def_id);
         (param.def_id, ResolvedArg::EarlyBound(param.def_id.to_def_id()))

compiler/rustc_infer/src/infer/canonical/instantiate.rs

@@ -13,8 +13,8 @@ use rustc_middle::ty::{self, TyCtxt};
 
 /// FIXME(-Znext-solver): This or public because it is shared with the
 /// new trait solver implementation. We should deduplicate canonicalization.
-#[extension]
-pub impl<'tcx, V> CanonicalExt<'tcx, V> for Canonical<'tcx, V> {
+#[extension(pub trait CanonicalExt<'tcx, V>)]
+impl<'tcx, V> Canonical<'tcx, V> {
     /// Instantiate the wrapped value, replacing each canonical value
     /// with the value given in `var_values`.
     fn instantiate(&self, tcx: TyCtxt<'tcx>, var_values: &CanonicalVarValues<'tcx>) -> V

compiler/rustc_infer/src/infer/error_reporting/mod.rs

@@ -2786,8 +2786,8 @@ pub enum FailureCode {
     Error0644,
 }
 
-#[extension]
-pub impl<'tcx> ObligationCauseExt<'tcx> for ObligationCause<'tcx> {
+#[extension(pub trait ObligationCauseExt<'tcx>)]
+impl<'tcx> ObligationCause<'tcx> {
     fn as_failure_code(&self, terr: TypeError<'tcx>) -> FailureCode {
         use self::FailureCode::*;
         use crate::traits::ObligationCauseCode::*;

compiler/rustc_infer/src/infer/mod.rs

@@ -626,8 +626,8 @@ pub struct InferCtxtBuilder<'tcx> {
     next_trait_solver: bool,
 }
 
-#[extension]
-pub impl<'tcx> TyCtxtInferExt<'tcx> for TyCtxt<'tcx> {
+#[extension(pub trait TyCtxtInferExt<'tcx>)]
+impl<'tcx> TyCtxt<'tcx> {
     fn infer_ctxt(self) -> InferCtxtBuilder<'tcx> {
         InferCtxtBuilder {
             tcx: self,

compiler/rustc_infer/src/traits/engine.rs

@@ -52,8 +52,8 @@ pub trait TraitEngine<'tcx>: 'tcx {
     ) -> Vec<PredicateObligation<'tcx>>;
 }
 
-#[extension]
-pub impl<'tcx, T: ?Sized + TraitEngine<'tcx>> TraitEngineExt<'tcx> for T {
+#[extension(pub trait TraitEngineExt<'tcx>)]
+impl<'tcx, T: ?Sized + TraitEngine<'tcx>> T {
     fn register_predicate_obligations(
         &mut self,
         infcx: &InferCtxt<'tcx>,