Add PartialOrd and Ord to EasyBuf, generalize PartialEq.

src/io/frame.rs

@@ -1,5 +1,6 @@
 use std::fmt;
 use std::io;
+use std::hash;
 use std::mem;
 use std::cmp;
 use std::ops::{Deref, DerefMut};
@@ -24,12 +25,6 @@ pub struct EasyBuf {
     end: usize,
 }
 
-impl PartialEq for EasyBuf {
-    fn eq(&self, other: &EasyBuf) -> bool {
-        self.as_slice() == other.as_slice()
-    }
-}
-
 /// An RAII object returned from `get_mut` which provides mutable access to the
 /// underlying `Vec<u8>`.
 pub struct EasyBufMut<'a> {
@@ -201,6 +196,30 @@ impl From<Vec<u8>> for EasyBuf {
     }
 }
 
+impl<T: AsRef<[u8]>> PartialEq<T> for EasyBuf {
+    fn eq(&self, other: &T) -> bool {
+        self.as_slice().eq(other.as_ref())
+    }
+}
+
+impl Ord for EasyBuf {
+    fn cmp(&self, other: &Self) -> cmp::Ordering {
+        self.as_slice().cmp(other.as_slice())
+    }
+}
+
+impl<T: AsRef<[u8]>> PartialOrd<T> for EasyBuf {
+    fn partial_cmp(&self, other: &T) -> Option<cmp::Ordering> {
+        self.as_slice().partial_cmp(other.as_ref())
+    }
+}
+
+impl hash::Hash for EasyBuf {
+    fn hash<H: hash::Hasher>(&self, state: &mut H) {
+        self.as_slice().hash(state)
+    }
+}
+
 impl<'a> Drop for EasyBufMut<'a> {
     fn drop(&mut self) {
         *self.end = self.buf.len();