Add the 'get()' method

Also some type fixes

Author: Bradlee Speice

src/message.rs

@@ -25,7 +25,7 @@ use any_pointer;
 use private::arena::{BuilderArenaImpl, ReaderArenaImpl, BuilderArena, ReaderArena};
 use private::layout;
 use private::units::BYTES_PER_WORD;
-use traits::{FromPointerReader, FromPointerBuilder, SetPointerBuilder};
+use traits::{FromPointerReader, FromPointerBuilder, SetPointerBuilder, Owned};
 use {OutputSegments, Result, Word};
 
 /// Options controlling how data is read.
@@ -180,21 +180,25 @@ impl <S> Reader<S> where S: ReaderSegments {
 /// A reader object that owns the underlying data in the message
 pub struct OwnedReader<S, T>
     where S: ReaderSegments,
-          T: for<'a> ::capnp::traits::Owned<'a> {
+          T: for<'a> Owned<'a> {
     marker: ::std::marker::PhantomData<T>,
-    message: ::capnp::message::Reader<S>,
+    message: Reader<S>,
 }
 
 impl <S, T> OwnedReader<S, T>
     where S: ReaderSegments,
-          T : for<'a> ::capnp::traits::Owned<'a> {
+          T : for<'a> Owned<'a> {
 
-    pub fn new(message: ::capnp::message::Reader<::capnp::serialize::OwnedSegments>) -> Self {
+    pub fn new(message: Reader<S>) -> Self {
         OwnedReader {
             marker: ::std::marker::PhantomData,
             message: message,
         }
     }
+
+    pub fn get<'a> (&'a self) -> Result<<T as Owned<'a>>::Reader> {
+        self.message.get_root()
+    }
 }
 
 /// An object that allocates memory for a Cap'n Proto message as it is being built.