Rollup merge of #122839 - compiler-errors:predicate-polarity, r=lcnr

Split out `PredicatePolarity` from `ImplPolarity`

Because having to deal with a third `Reservation` level in all the trait solver code is kind of weird.

r? `@lcnr` or `@oli-obk`

3 files changed, 6 insertions, 6 deletions

diff --git a/clippy_lints/src/derive.rs b/clippy_lints/src/derive.rs
index f0f2c7d6658..c554edc8fce 100644
--- a/clippy_lints/src/derive.rs
+++ b/clippy_lints/src/derive.rs
@@ -11,7 +11,7 @@ use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::hir::nested_filter;
 use rustc_middle::traits::Reveal;
 use rustc_middle::ty::{
-    self, ClauseKind, GenericArgKind, GenericParamDefKind, ImplPolarity, ParamEnv, ToPredicate, TraitPredicate, Ty,
+    self, ClauseKind, GenericArgKind, GenericParamDefKind, ParamEnv, ToPredicate, TraitPredicate, Ty,
     TyCtxt,
 };
 use rustc_session::declare_lint_pass;
@@ -502,7 +502,7 @@ fn param_env_for_derived_eq(tcx: TyCtxt<'_>, did: DefId, eq_trait_id: DefId) ->
             params.iter().filter(|&&(_, needs_eq)| needs_eq).map(|&(param, _)| {
                 ClauseKind::Trait(TraitPredicate {
                     trait_ref: ty::TraitRef::new(tcx, eq_trait_id, [tcx.mk_param_from_def(param)]),
-                    polarity: ImplPolarity::Positive,
+                    polarity: ty::PredicatePolarity::Positive,
                 })
                 .to_predicate(tcx)
             }),
diff --git a/clippy_lints/src/eta_reduction.rs b/clippy_lints/src/eta_reduction.rs
index 40be71a0e5d..eccfc31fdd3 100644
--- a/clippy_lints/src/eta_reduction.rs
+++ b/clippy_lints/src/eta_reduction.rs
@@ -9,7 +9,7 @@ use rustc_hir::{BindingAnnotation, Expr, ExprKind, FnRetTy, Param, PatKind, QPat
 use rustc_infer::infer::TyCtxtInferExt;
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::ty::{
-    self, Binder, ClosureArgs, ClosureKind, FnSig, GenericArg, GenericArgKind, ImplPolarity, List, Region, RegionKind,
+    self, Binder, ClosureArgs, ClosureKind, FnSig, GenericArg, GenericArgKind, List, Region, RegionKind,
     Ty, TypeVisitableExt, TypeckResults,
 };
 use rustc_session::declare_lint_pass;
@@ -173,7 +173,7 @@ impl<'tcx> LateLintPass<'tcx> for EtaReduction {
                             if let Ok((ClosureKind::FnMut, _)) = cx.tcx.infer_ctxt().build().type_implements_fn_trait(
                                 cx.param_env,
                                 Binder::bind_with_vars(callee_ty_adjusted, List::empty()),
-                                ImplPolarity::Positive,
+                                ty::PredicatePolarity::Positive,
                             ) && path_to_local(callee).map_or(false, |l| {
                                 local_used_in(cx, l, args) || local_used_after_expr(cx, l, expr)
                             }) {
diff --git a/clippy_lints/src/methods/unnecessary_to_owned.rs b/clippy_lints/src/methods/unnecessary_to_owned.rs
index c234e4f9b11..abf717126fb 100644
--- a/clippy_lints/src/methods/unnecessary_to_owned.rs
+++ b/clippy_lints/src/methods/unnecessary_to_owned.rs
@@ -18,7 +18,7 @@ use rustc_lint::LateContext;
 use rustc_middle::mir::Mutability;
 use rustc_middle::ty::adjustment::{Adjust, Adjustment, OverloadedDeref};
 use rustc_middle::ty::{
-    self, ClauseKind, GenericArg, GenericArgKind, GenericArgsRef, ImplPolarity, ParamTy, ProjectionPredicate,
+    self, ClauseKind, GenericArg, GenericArgKind, GenericArgsRef, ParamTy, ProjectionPredicate,
     TraitPredicate, Ty,
 };
 use rustc_span::{sym, Symbol};
@@ -669,7 +669,7 @@ fn check_borrow_predicate<'tcx>(cx: &LateContext<'tcx>, expr: &Expr<'tcx>) {
         && let Some(borrow_id) = cx.tcx.get_diagnostic_item(sym::Borrow)
         && cx.tcx.predicates_of(method_def_id).predicates.iter().any(|(pred, _)| {
             if let ClauseKind::Trait(trait_pred) = pred.kind().skip_binder()
-                && trait_pred.polarity == ImplPolarity::Positive
+                && trait_pred.polarity == ty::PredicatePolarity::Positive
                 && trait_pred.trait_ref.def_id == borrow_id
             {
                 true