From 1e679154da915f971216f8e925eda2a1b47a38af Mon Sep 17 00:00:00 2001
From: Nicholas Nethercote <n.nethercote@gmail.com>
Date: Thu, 31 Jul 2025 16:35:38 +1000
Subject: Move `rustc_middle::MaxUniverse` to `rustc_infer`.

Because `rust_infer` is the only crate that uses it.
---
 compiler/rustc_middle/src/ty/mod.rs   |  1 -
 compiler/rustc_middle/src/ty/visit.rs | 39 -----------------------------------
 2 files changed, 40 deletions(-)

(limited to 'compiler/rustc_middle/src')

diff --git a/compiler/rustc_middle/src/ty/mod.rs b/compiler/rustc_middle/src/ty/mod.rs
index e567ba05f61..da17ec1f9f3 100644
--- a/compiler/rustc_middle/src/ty/mod.rs
+++ b/compiler/rustc_middle/src/ty/mod.rs
@@ -109,7 +109,6 @@ pub use self::typeck_results::{
     CanonicalUserType, CanonicalUserTypeAnnotation, CanonicalUserTypeAnnotations, IsIdentity,
     Rust2024IncompatiblePatInfo, TypeckResults, UserType, UserTypeAnnotationIndex, UserTypeKind,
 };
-pub use self::visit::*;
 use crate::error::{OpaqueHiddenTypeMismatch, TypeMismatchReason};
 use crate::metadata::ModChild;
 use crate::middle::privacy::EffectiveVisibilities;
diff --git a/compiler/rustc_middle/src/ty/visit.rs b/compiler/rustc_middle/src/ty/visit.rs
index 3853a804a92..f0c47f257cc 100644
--- a/compiler/rustc_middle/src/ty/visit.rs
+++ b/compiler/rustc_middle/src/ty/visit.rs
@@ -212,42 +212,3 @@ impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for LateBoundRegionsCollector {
         }
     }
 }
-
-/// Finds the max universe present
-pub struct MaxUniverse {
-    max_universe: ty::UniverseIndex,
-}
-
-impl MaxUniverse {
-    pub fn new() -> Self {
-        MaxUniverse { max_universe: ty::UniverseIndex::ROOT }
-    }
-
-    pub fn max_universe(self) -> ty::UniverseIndex {
-        self.max_universe
-    }
-}
-
-impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for MaxUniverse {
-    fn visit_ty(&mut self, t: Ty<'tcx>) {
-        if let ty::Placeholder(placeholder) = t.kind() {
-            self.max_universe = self.max_universe.max(placeholder.universe);
-        }
-
-        t.super_visit_with(self)
-    }
-
-    fn visit_const(&mut self, c: ty::consts::Const<'tcx>) {
-        if let ty::ConstKind::Placeholder(placeholder) = c.kind() {
-            self.max_universe = self.max_universe.max(placeholder.universe);
-        }
-
-        c.super_visit_with(self)
-    }
-
-    fn visit_region(&mut self, r: ty::Region<'tcx>) {
-        if let ty::RePlaceholder(placeholder) = r.kind() {
-            self.max_universe = self.max_universe.max(placeholder.universe);
-        }
-    }
-}
-- 
cgit 1.4.1-3-g733a5