From 80b2f5f9e11af4e9f7d1b53b45b15c73720eb84c Mon Sep 17 00:00:00 2001
From: Mingun <Alexander_Sergey@mail.ru>
Date: Fri, 6 Jun 2025 10:34:16 +0500
Subject: [PATCH 1/2] Remove `actually_private::T`

It just makes life harder in some cases without any benefits
---
 serde/src/de/mod.rs     |  1 -
 serde/src/lib.rs        |  5 -----
 serde/src/private/de.rs | 15 +++------------
 3 files changed, 3 insertions(+), 18 deletions(-)

diff --git a/serde/src/de/mod.rs b/serde/src/de/mod.rs
index b2cc64c8..e3e98e19 100644
--- a/serde/src/de/mod.rs
+++ b/serde/src/de/mod.rs
@@ -1228,7 +1228,6 @@ pub trait Deserializer<'de>: Sized {
     #[doc(hidden)]
     fn __deserialize_content<V>(
         self,
-        _: crate::actually_private::T,
         visitor: V,
     ) -> Result<crate::__private::de::Content<'de>, Self::Error>
     where
diff --git a/serde/src/lib.rs b/serde/src/lib.rs
index 84b5cd7e..0341ff28 100644
--- a/serde/src/lib.rs
+++ b/serde/src/lib.rs
@@ -340,8 +340,3 @@ extern crate serde_derive;
 #[cfg(feature = "serde_derive")]
 #[cfg_attr(docsrs, doc(cfg(feature = "derive")))]
 pub use serde_derive::{Deserialize, Serialize};
-
-#[cfg(all(not(no_serde_derive), any(feature = "std", feature = "alloc")))]
-mod actually_private {
-    pub struct T;
-}
diff --git a/serde/src/private/de.rs b/serde/src/private/de.rs
index af5878bb..62a76d12 100644
--- a/serde/src/private/de.rs
+++ b/serde/src/private/de.rs
@@ -208,7 +208,6 @@ mod content {
 
     use crate::lib::*;
 
-    use crate::actually_private;
     use crate::de::value::{MapDeserializer, SeqDeserializer};
     use crate::de::{
         self, size_hint, Deserialize, DeserializeSeed, Deserializer, EnumAccess, Expected,
@@ -298,7 +297,7 @@ mod content {
             // Untagged and internally tagged enums are only supported in
             // self-describing formats.
             let visitor = ContentVisitor { value: PhantomData };
-            deserializer.__deserialize_content(actually_private::T, visitor)
+            deserializer.__deserialize_content(visitor)
         }
     }
 
@@ -1498,11 +1497,7 @@ mod content {
             visitor.visit_unit()
         }
 
-        fn __deserialize_content<V>(
-            self,
-            _: actually_private::T,
-            visitor: V,
-        ) -> Result<Content<'de>, Self::Error>
+        fn __deserialize_content<V>(self, visitor: V) -> Result<Content<'de>, Self::Error>
         where
             V: Visitor<'de, Value = Content<'de>>,
         {
@@ -2091,11 +2086,7 @@ mod content {
             visitor.visit_unit()
         }
 
-        fn __deserialize_content<V>(
-            self,
-            _: actually_private::T,
-            visitor: V,
-        ) -> Result<Content<'de>, Self::Error>
+        fn __deserialize_content<V>(self, visitor: V) -> Result<Content<'de>, Self::Error>
         where
             V: Visitor<'de, Value = Content<'de>>,
         {

From ad6c54857373ca92f6ff6d8eddc8c1d0ec0158b9 Mon Sep 17 00:00:00 2001
From: Mingun <Alexander_Sergey@mail.ru>
Date: Fri, 6 Jun 2025 10:38:41 +0500
Subject: [PATCH 2/2] Use associated type in signature to not repeat concrete
 type

---
 serde/src/de/mod.rs     | 5 +----
 serde/src/private/de.rs | 4 ++--
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/serde/src/de/mod.rs b/serde/src/de/mod.rs
index e3e98e19..15e32cca 100644
--- a/serde/src/de/mod.rs
+++ b/serde/src/de/mod.rs
@@ -1226,10 +1226,7 @@ pub trait Deserializer<'de>: Sized {
     // Not public API.
     #[cfg(all(not(no_serde_derive), any(feature = "std", feature = "alloc")))]
     #[doc(hidden)]
-    fn __deserialize_content<V>(
-        self,
-        visitor: V,
-    ) -> Result<crate::__private::de::Content<'de>, Self::Error>
+    fn __deserialize_content<V>(self, visitor: V) -> Result<V::Value, Self::Error>
     where
         V: Visitor<'de, Value = crate::__private::de::Content<'de>>,
     {
diff --git a/serde/src/private/de.rs b/serde/src/private/de.rs
index 62a76d12..34bfcb66 100644
--- a/serde/src/private/de.rs
+++ b/serde/src/private/de.rs
@@ -1497,7 +1497,7 @@ mod content {
             visitor.visit_unit()
         }
 
-        fn __deserialize_content<V>(self, visitor: V) -> Result<Content<'de>, Self::Error>
+        fn __deserialize_content<V>(self, visitor: V) -> Result<V::Value, Self::Error>
         where
             V: Visitor<'de, Value = Content<'de>>,
         {
@@ -2086,7 +2086,7 @@ mod content {
             visitor.visit_unit()
         }
 
-        fn __deserialize_content<V>(self, visitor: V) -> Result<Content<'de>, Self::Error>
+        fn __deserialize_content<V>(self, visitor: V) -> Result<V::Value, Self::Error>
         where
             V: Visitor<'de, Value = Content<'de>>,
         {