From 55d814633423c801034fca46f4f391d0c5fd3899 Mon Sep 17 00:00:00 2001
From: Kyle Matsuda <kyle.yoshio.matsuda@gmail.com>
Date: Mon, 17 Apr 2023 17:19:08 -0600
Subject: [PATCH] add subst_identity_iter and subst_identity_iter_copied
 methods on EarlyBinder; use this to simplify some EarlyBinder noise around
 explicit_item_bounds calls

---
 clippy_utils/src/ty.rs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/clippy_utils/src/ty.rs b/clippy_utils/src/ty.rs
index 5f768928a..cb700126c 100644
--- a/clippy_utils/src/ty.rs
+++ b/clippy_utils/src/ty.rs
@@ -90,8 +90,7 @@ pub fn contains_ty_adt_constructor_opaque<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'
                         return false;
                     }
 
-                    for bound in cx.tcx.explicit_item_bounds(def_id).transpose_iter() {
-                        let (predicate, _span) = bound.map_bound(|b| *b).subst_identity();
+                    for (predicate, _span) in cx.tcx.explicit_item_bounds(def_id).subst_identity_iter_copied() {
                         match predicate.kind().skip_binder() {
                             // For `impl Trait<U>`, it will register a predicate of `T: Trait<U>`, so we go through
                             // and check substituions to find `U`.