Rewrite crate with serde support from ground up

This commit completely rewrites this crate from the ground up,
supporting serde at the lowest levels as I believe serde support was
intended to do. This is a major change from the previous versions of
this crate, with a summary of changes being:

* Serialization directly to TOML is now supported without going through
  a `Value` first.

* Deserialization directly from TOML is now supported without going
  through a `Value`. Note that due to the TOML format some values still
  are buffered in intermediate memory, but overall this should be at a
  minimum now.

* The API of `Value` was overhauled to match the API of
  `serde_json::Value`. The changes here were to:

  * Add `is_*` accessors
  * Add `get` and `get_mut` for one-field lookups.
  * Implement panicking lookups through `Index`

  The old `index` methods are now gone in favor of `get` and `Index`
  implementations.

* A `Datetime` type has been added to represent a TOML datetime in a
  first-class fashion. Currently this type provides no accessors other
  than a `Display` implementation, but the idea is that this will grow
  support over time for decomposing the date.

* Support for the `rustc-serialize` crate has been dropped, that'll stay
  on the 0.2 and 0.1 release trains.

* This crate no longer supports the detection of unused fields, for that though
  you can use the `serde_ignored` crate on crates.io

1 files changed, 12 insertions, 9 deletions

diff --git a/tests/formatting.rs b/tests/formatting.rs
index b8f4082..10fb165 100644
--- a/tests/formatting.rs
+++ b/tests/formatting.rs
@@ -1,19 +1,22 @@
-extern crate rustc_serialize;
+extern crate serde;
+#[macro_use]
+extern crate serde_derive;
 extern crate toml;
-use toml::encode_str;
 
-#[derive(Debug, Clone, Hash, PartialEq, Eq, RustcEncodable, RustcDecodable)]
+use toml::to_string;
+
+#[derive(Debug, Clone, Hash, PartialEq, Eq, Serialize, Deserialize)]
 struct User {
     pub name: String,
     pub surname: String,
 }
 
-#[derive(Debug, Clone, Hash, PartialEq, Eq, RustcEncodable, RustcDecodable)]
+#[derive(Debug, Clone, Hash, PartialEq, Eq, Serialize, Deserialize)]
 struct Users {
     pub user: Vec<User>,
 }
 
-#[derive(Debug, Clone, Hash, PartialEq, Eq, RustcEncodable, RustcDecodable)]
+#[derive(Debug, Clone, Hash, PartialEq, Eq, Serialize, Deserialize)]
 struct TwoUsers {
     pub user0: User,
     pub user1: User,
@@ -21,7 +24,7 @@ struct TwoUsers {
 
 #[test]
 fn no_unnecessary_newlines_array() {
-    assert!(!encode_str(&Users {
+    assert!(!to_string(&Users {
             user: vec![
                     User {
                         name: "John".to_string(),
@@ -32,13 +35,13 @@ fn no_unnecessary_newlines_array() {
                         surname: "Dough".to_string(),
                     },
                 ],
-        })
+        }).unwrap()
         .starts_with("\n"));
 }
 
 #[test]
 fn no_unnecessary_newlines_table() {
-    assert!(!encode_str(&TwoUsers {
+    assert!(!to_string(&TwoUsers {
             user0: User {
                 name: "John".to_string(),
                 surname: "Doe".to_string(),
@@ -47,6 +50,6 @@ fn no_unnecessary_newlines_table() {
                 name: "Jane".to_string(),
                 surname: "Dough".to_string(),
             },
-        })
+        }).unwrap()
         .starts_with("\n"));
 }