librustc: Remove `~EXPR`, `~TYPE`, and `~PAT` from the language, except

for `~str`/`~[]`.

Note that `~self` still remains, since I forgot to add support for
`Box<self>` before the snapshot.

How to update your code:

* Instead of `~EXPR`, you should write `box EXPR`.

* Instead of `~TYPE`, you should write `Box<Type>`.

* Instead of `~PATTERN`, you should write `box PATTERN`.

[breaking-change]

2 files changed, 10 insertions, 11 deletions

diff --git a/src/libserialize/json.rs b/src/libserialize/json.rs
index 5c86566b2af..d1fe04bccf8 100644
--- a/src/libserialize/json.rs
+++ b/src/libserialize/json.rs
@@ -113,7 +113,7 @@ pub struct MyStruct  {
 
 impl ToJson for MyStruct {
     fn to_json( &self ) -> json::Json {
-        let mut d = ~TreeMap::new();
+        let mut d = box TreeMap::new();
         d.insert("attr1".to_owned(), self.attr1.to_json());
         d.insert("attr2".to_owned(), self.attr2.to_json());
         json::Object(d)
@@ -206,7 +206,7 @@ pub struct TestStruct1  {
 
 impl ToJson for TestStruct1 {
     fn to_json( &self ) -> json::Json {
-        let mut d = ~TreeMap::new();
+        let mut d = box TreeMap::new();
         d.insert("data_int".to_owned(), self.data_int.to_json());
         d.insert("data_str".to_owned(), self.data_str.to_json());
         d.insert("data_vector".to_owned(), self.data_vector.to_json());
@@ -232,21 +232,20 @@ fn main() {
 
 */
 
-use collections::HashMap;
 use std::char;
 use std::f64;
+use std::fmt;
 use std::io::MemWriter;
 use std::io;
+use std::mem::swap;
 use std::num;
-use std::str;
 use std::str::ScalarValue;
+use std::str;
 use std::strbuf::StrBuf;
-use std::fmt;
 use std::vec::Vec;
-use std::mem::swap;
 
 use Encodable;
-use collections::TreeMap;
+use collections::{HashMap, TreeMap};
 
 /// Represents a json value
 #[deriving(Clone, Eq)]
@@ -255,7 +254,7 @@ pub enum Json {
     String(~str),
     Boolean(bool),
     List(List),
-    Object(~Object),
+    Object(Box<Object>),
     Null,
 }
 
diff --git a/src/libserialize/serialize.rs b/src/libserialize/serialize.rs
index 65f1016515f..9d68705fca7 100644
--- a/src/libserialize/serialize.rs
+++ b/src/libserialize/serialize.rs
@@ -391,14 +391,14 @@ impl<'a, E, S:Encoder<E>,T:Encodable<S, E>> Encodable<S, E> for &'a T {
     }
 }
 
-impl<E, S:Encoder<E>,T:Encodable<S, E>> Encodable<S, E> for ~T {
+impl<E, S:Encoder<E>,T:Encodable<S, E>> Encodable<S, E> for Box<T> {
     fn encode(&self, s: &mut S) -> Result<(), E> {
         (**self).encode(s)
     }
 }
 
-impl<E, D:Decoder<E>,T:Decodable<D, E>> Decodable<D, E> for ~T {
-    fn decode(d: &mut D) -> Result<~T, E> {
+impl<E, D:Decoder<E>,T:Decodable<D, E>> Decodable<D, E> for Box<T> {
+    fn decode(d: &mut D) -> Result<Box<T>, E> {
         Ok(box try!(Decodable::decode(d)))
     }
 }