Add warn(unreachable_pub) to rustc_monomorphize.

compiler/rustc_monomorphize/src/collector.rs

@@ -242,12 +242,12 @@
 use crate::errors::{self, EncounteredErrorWhileInstantiating, NoOptimizedMir, RecursionLimit};
 
 #[derive(PartialEq)]
-pub enum MonoItemCollectionStrategy {
+pub(crate) enum MonoItemCollectionStrategy {
     Eager,
     Lazy,
 }
 
-pub struct UsageMap<'tcx> {
+pub(crate) struct UsageMap<'tcx> {
     // Maps every mono item to the mono items used by it.
     used_map: UnordMap<MonoItem<'tcx>, Vec<MonoItem<'tcx>>>,
 
@@ -306,13 +306,17 @@ fn record_used<'a>(
         assert!(self.used_map.insert(user_item, used_items).is_none());
     }
 
-    pub fn get_user_items(&self, item: MonoItem<'tcx>) -> &[MonoItem<'tcx>] {
+    pub(crate) fn get_user_items(&self, item: MonoItem<'tcx>) -> &[MonoItem<'tcx>] {
         self.user_map.get(&item).map(|items| items.as_slice()).unwrap_or(&[])
     }
 
     /// Internally iterate over all inlined items used by `item`.
-    pub fn for_each_inlined_used_item<F>(&self, tcx: TyCtxt<'tcx>, item: MonoItem<'tcx>, mut f: F)
-    where
+    pub(crate) fn for_each_inlined_used_item<F>(
+        &self,
+        tcx: TyCtxt<'tcx>,
+        item: MonoItem<'tcx>,
+        mut f: F,
+    ) where
         F: FnMut(MonoItem<'tcx>),
     {
         let used_items = self.used_map.get(&item).unwrap();
@@ -1615,6 +1619,6 @@ pub(crate) fn collect_crate_mono_items<'tcx>(
     (mono_items, state.usage_map.into_inner())
 }
 
-pub fn provide(providers: &mut Providers) {
+pub(crate) fn provide(providers: &mut Providers) {
     providers.hooks.should_codegen_locally = should_codegen_locally;
 }

compiler/rustc_monomorphize/src/errors.rs

@@ -8,7 +8,7 @@
 
 #[derive(Diagnostic)]
 #[diag(monomorphize_recursion_limit)]
-pub struct RecursionLimit {
+pub(crate) struct RecursionLimit {
     #[primary_span]
     pub span: Span,
     pub shrunk: String,
@@ -22,13 +22,13 @@ pub struct RecursionLimit {
 
 #[derive(Diagnostic)]
 #[diag(monomorphize_no_optimized_mir)]
-pub struct NoOptimizedMir {
+pub(crate) struct NoOptimizedMir {
     #[note]
     pub span: Span,
     pub crate_name: Symbol,
 }
 
-pub struct UnusedGenericParamsHint {
+pub(crate) struct UnusedGenericParamsHint {
     pub span: Span,
     pub param_spans: Vec<Span>,
     pub param_names: Vec<String>,
@@ -53,7 +53,7 @@ fn into_diag(self, dcx: DiagCtxtHandle<'_>, level: Level) -> Diag<'_, G> {
 #[derive(LintDiagnostic)]
 #[diag(monomorphize_large_assignments)]
 #[note]
-pub struct LargeAssignmentsLint {
+pub(crate) struct LargeAssignmentsLint {
     #[label]
     pub span: Span,
     pub size: u64,
@@ -62,7 +62,7 @@ pub struct LargeAssignmentsLint {
 
 #[derive(Diagnostic)]
 #[diag(monomorphize_symbol_already_defined)]
-pub struct SymbolAlreadyDefined {
+pub(crate) struct SymbolAlreadyDefined {
     #[primary_span]
     pub span: Option<Span>,
     pub symbol: String,
@@ -70,13 +70,13 @@ pub struct SymbolAlreadyDefined {
 
 #[derive(Diagnostic)]
 #[diag(monomorphize_couldnt_dump_mono_stats)]
-pub struct CouldntDumpMonoStats {
+pub(crate) struct CouldntDumpMonoStats {
     pub error: String,
 }
 
 #[derive(Diagnostic)]
 #[diag(monomorphize_encountered_error_while_instantiating)]
-pub struct EncounteredErrorWhileInstantiating {
+pub(crate) struct EncounteredErrorWhileInstantiating {
     #[primary_span]
     pub span: Span,
     pub formatted_item: String,
@@ -85,10 +85,10 @@ pub struct EncounteredErrorWhileInstantiating {
 #[derive(Diagnostic)]
 #[diag(monomorphize_start_not_found)]
 #[help]
-pub struct StartNotFound;
+pub(crate) struct StartNotFound;
 
 #[derive(Diagnostic)]
 #[diag(monomorphize_unknown_cgu_collection_mode)]
-pub struct UnknownCguCollectionMode<'a> {
+pub(crate) struct UnknownCguCollectionMode<'a> {
     pub mode: &'a str,
 }

compiler/rustc_monomorphize/src/lib.rs

@@ -1,5 +1,6 @@
 // tidy-alphabetical-start
 #![feature(array_windows)]
+#![warn(unreachable_pub)]
 // tidy-alphabetical-end
 
 use rustc_hir::lang_items::LangItem;

compiler/rustc_monomorphize/src/partitioning.rs

@@ -1300,7 +1300,7 @@ struct MonoItem {
     Ok(())
 }
 
-pub fn provide(providers: &mut Providers) {
+pub(crate) fn provide(providers: &mut Providers) {
     providers.collect_and_partition_mono_items = collect_and_partition_mono_items;
 
     providers.is_codegened_item = |tcx, def_id| {

compiler/rustc_monomorphize/src/polymorphize.rs

@@ -19,7 +19,7 @@
 use crate::errors::UnusedGenericParamsHint;
 
 /// Provide implementations of queries relating to polymorphization analysis.
-pub fn provide(providers: &mut Providers) {
+pub(crate) fn provide(providers: &mut Providers) {
     providers.unused_generic_params = unused_generic_params;
 }