Auto merge of #76571 - lzutao:rustdoc-private-traits, r=jyn514

Ignore rustc_private items from std docs

By ignoring rustc_private items for non local impl block,
this may fix #74672 and fix #75588 .

This might suppress #76529 if it is simple enough for backport.

1 files changed, 10 insertions, 9 deletions

diff --git a/src/librustdoc/clean/inline.rs b/src/librustdoc/clean/inline.rs
index 50cb987cf08..f8987c6beca 100644
--- a/src/librustdoc/clean/inline.rs
+++ b/src/librustdoc/clean/inline.rs
@@ -337,18 +337,13 @@ pub fn build_impl(
     // reachable in rustdoc generated documentation
     if !did.is_local() {
         if let Some(traitref) = associated_trait {
-            if !cx.renderinfo.borrow().access_levels.is_public(traitref.def_id) {
+            let did = traitref.def_id;
+            if !cx.renderinfo.borrow().access_levels.is_public(did) {
                 return;
             }
-        }
 
-        // Skip foreign unstable traits from lists of trait implementations and
-        // such. This helps prevent dependencies of the standard library, for
-        // example, from getting documented as "traits `u32` implements" which
-        // isn't really too helpful.
-        if let Some(trait_did) = associated_trait {
-            if let Some(stab) = cx.tcx.lookup_stability(trait_did.def_id) {
-                if stab.level.is_unstable() {
+            if let Some(stab) = tcx.lookup_stability(did) {
+                if stab.level.is_unstable() && stab.feature == sym::rustc_private {
                     return;
                 }
             }
@@ -372,6 +367,12 @@ pub fn build_impl(
             if !cx.renderinfo.borrow().access_levels.is_public(did) {
                 return;
             }
+
+            if let Some(stab) = tcx.lookup_stability(did) {
+                if stab.level.is_unstable() && stab.feature == sym::rustc_private {
+                    return;
+                }
+            }
         }
     }