Move describe_as_module from rustc_middle::print to rustc:middle::query.

That way it doesn't need to be exported.

Author: nnethercote

compiler/rustc_middle/src/query/mod.rs

@@ -135,7 +135,7 @@ use crate::traits::{
 };
 use crate::ty::fast_reject::SimplifiedType;
 use crate::ty::layout::ValidityRequirement;
-use crate::ty::print::{PrintTraitRefExt, describe_as_module};
+use crate::ty::print::PrintTraitRefExt;
 use crate::ty::util::AlwaysRequiresDrop;
 use crate::ty::{
     self, CrateInherentImpls, GenericArg, GenericArgsRef, PseudoCanonicalInput, SizedTraitKind, Ty,
@@ -2731,3 +2731,12 @@ rustc_queries! {
 
 rustc_with_all_queries! { define_callbacks! }
 rustc_feedable_queries! { define_feedable! }
+
+fn describe_as_module(def_id: impl Into<LocalDefId>, tcx: TyCtxt<'_>) -> String {
+    let def_id = def_id.into();
+    if def_id.is_top_level_module() {
+        "top-level module".to_string()
+    } else {
+        format!("module `{}`", tcx.def_path_str(def_id))
+    }
+}

compiler/rustc_middle/src/ty/print/mod.rs

@@ -2,7 +2,7 @@ use hir::def::Namespace;
 use rustc_data_structures::fx::FxHashSet;
 use rustc_data_structures::sso::SsoHashSet;
 use rustc_hir as hir;
-use rustc_hir::def_id::{CrateNum, DefId, LocalDefId};
+use rustc_hir::def_id::{CrateNum, DefId};
 use rustc_hir::definitions::{DefPathData, DisambiguatedDefPathData};
 use tracing::{debug, instrument, trace};
 
@@ -396,16 +396,6 @@ impl<'tcx, P: Printer<'tcx>> Print<'tcx, P> for ty::Const<'tcx> {
     }
 }
 
-// This is only used by query descriptions
-pub fn describe_as_module(def_id: impl Into<LocalDefId>, tcx: TyCtxt<'_>) -> String {
-    let def_id = def_id.into();
-    if def_id.is_top_level_module() {
-        "top-level module".to_string()
-    } else {
-        format!("module `{}`", tcx.def_path_str(def_id))
-    }
-}
-
 impl<T> rustc_type_ir::ir_print::IrPrint<T> for TyCtxt<'_>
 where
     T: Copy + for<'a, 'tcx> Lift<TyCtxt<'tcx>, Lifted: Print<'tcx, FmtPrinter<'a, 'tcx>>>,