fix(rustup): get rid of slice pattern, add Reflect bounds

* remove slice pattern
* add `Reflect` trait bounds where necessary

src/net.rs

@@ -7,6 +7,7 @@ use std::mem;
 use std::path::Path;
 use std::raw::{self, TraitObject};
 use std::sync::Arc;
+use std::marker::Reflect;
 
 use openssl::ssl::{Ssl, SslStream, SslContext};
 use openssl::ssl::SslVerifyMode::SslVerifyNone;
@@ -117,13 +118,13 @@ impl NetworkStream + Send {
 impl NetworkStream + Send {
     /// Is the underlying type in this trait object a T?
     #[inline]
-    pub fn is<T: 'static>(&self) -> bool {
+    pub fn is<T: Reflect + 'static>(&self) -> bool {
         self.get_type_id() == TypeId::of::<T>()
     }
 
     /// If the underlying type is T, get a reference to the contained data.
     #[inline]
-    pub fn downcast_ref<T: 'static>(&self) -> Option<&T> {
+    pub fn downcast_ref<T: Reflect + 'static>(&self) -> Option<&T> {
         if self.is::<T>() {
             Some(unsafe { self.downcast_ref_unchecked() })
         } else {
@@ -134,7 +135,7 @@ impl NetworkStream + Send {
     /// If the underlying type is T, get a mutable reference to the contained
     /// data.
     #[inline]
-    pub fn downcast_mut<T: 'static>(&mut self) -> Option<&mut T> {
+    pub fn downcast_mut<T: Reflect + 'static>(&mut self) -> Option<&mut T> {
         if self.is::<T>() {
             Some(unsafe { self.downcast_mut_unchecked() })
         } else {
@@ -143,7 +144,7 @@ impl NetworkStream + Send {
     }
 
     /// If the underlying type is T, extract it.
-    pub fn downcast<T: 'static>(self: Box<NetworkStream + Send>)
+    pub fn downcast<T: Reflect + 'static>(self: Box<NetworkStream + Send>)
             -> Result<Box<T>, Box<NetworkStream + Send>> {
         if self.is::<T>() {
             Ok(unsafe { self.downcast_unchecked() })