1 files changed, 10 insertions, 0 deletions
diff --git a/src/libstd/sys/common/mod.rs b/src/libstd/sys/common/mod.rs
index 6f6b4c58717..80fa5f64597 100644
--- a/src/libstd/sys/common/mod.rs
+++ b/src/libstd/sys/common/mod.rs
@@ -95,20 +95,30 @@ pub fn keep_going<F>(data: &[u8], mut f: F) -> i64 where
 }
 
 /// A trait for viewing representations from std types
+#[doc(hidden)]
 pub trait AsInner<Inner: ?Sized> {
     fn as_inner(&self) -> &Inner;
 }
 
+/// A trait for viewing representations from std types
+#[doc(hidden)]
+pub trait AsInnerMut<Inner: ?Sized> {
+    fn as_inner_mut(&mut self) -> &mut Inner;
+}
+
 /// A trait for extracting representations from std types
+#[doc(hidden)]
 pub trait IntoInner<Inner> {
     fn into_inner(self) -> Inner;
 }
 
 /// A trait for creating std types from internal representations
+#[doc(hidden)]
 pub trait FromInner<Inner> {
     fn from_inner(inner: Inner) -> Self;
 }
 
+#[doc(hidden)]
 pub trait ProcessConfig<K: BytesContainer, V: BytesContainer> {
     fn program(&self) -> &CString;
     fn args(&self) -> &[CString];