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, 32 insertions, 36 deletions

diff --git a/tests/valid.rs b/tests/valid.rs
index 09589c9..4229f1c 100644
--- a/tests/valid.rs
+++ b/tests/valid.rs
@@ -1,65 +1,61 @@
-extern crate rustc_serialize;
 extern crate toml;
+extern crate serde_json;
 
-use std::collections::BTreeMap;
-use rustc_serialize::json::Json;
+use toml::Value as Toml;
+use serde_json::Value as Json;
 
-use toml::{Parser, Value};
-use toml::Value::{Table, Integer, Float, Boolean, Datetime, Array};
-
-fn to_json(toml: Value) -> Json {
+fn to_json(toml: toml::Value) -> Json {
     fn doit(s: &str, json: Json) -> Json {
-        let mut map = BTreeMap::new();
-        map.insert(format!("{}", "type"), Json::String(format!("{}", s)));
-        map.insert(format!("{}", "value"), json);
+        let mut map = serde_json::Map::new();
+        map.insert("type".to_string(), Json::String(s.to_string()));
+        map.insert("value".to_string(), json);
         Json::Object(map)
     }
+
     match toml {
-        Value::String(s) => doit("string", Json::String(s)),
-        Integer(i) => doit("integer", Json::String(format!("{}", i))),
-        Float(f) => doit("float", Json::String({
+        Toml::String(s) => doit("string", Json::String(s)),
+        Toml::Integer(i) => doit("integer", Json::String(i.to_string())),
+        Toml::Float(f) => doit("float", Json::String({
             let s = format!("{:.15}", f);
             let s = format!("{}", s.trim_right_matches('0'));
             if s.ends_with(".") {format!("{}0", s)} else {s}
         })),
-        Boolean(b) => doit("bool", Json::String(format!("{}", b))),
-        Datetime(s) => doit("datetime", Json::String(s)),
-        Array(arr) => {
+        Toml::Boolean(b) => doit("bool", Json::String(format!("{}", b))),
+        Toml::Datetime(s) => doit("datetime", Json::String(s.to_string())),
+        Toml::Array(arr) => {
             let is_table = match arr.first() {
-                Some(&Table(..)) => true,
+                Some(&Toml::Table(..)) => true,
                 _ => false,
             };
             let json = Json::Array(arr.into_iter().map(to_json).collect());
             if is_table {json} else {doit("array", json)}
         }
-        Table(table) => Json::Object(table.into_iter().map(|(k, v)| {
-            (k, to_json(v))
-        }).collect()),
+        Toml::Table(table) => {
+            let mut map = serde_json::Map::new();
+            for (k, v) in table {
+                map.insert(k, to_json(v));
+            }
+            Json::Object(map)
+        }
     }
 }
 
 fn run(toml: &str, json: &str) {
-    let mut p = Parser::new(toml);
-    let table = p.parse();
-    assert!(p.errors.len() == 0, "had_errors: {:?}",
-            p.errors.iter().map(|e| {
-                (e.desc.clone(), &toml[e.lo - 5..e.hi + 5])
-            }).collect::<Vec<(String, &str)>>());
-    assert!(table.is_some());
-    let toml = Table(table.unwrap());
-    let toml_string = format!("{}", toml);
+    println!("parsing:\n{}", toml);
+    let toml: Toml = toml.parse().unwrap();
+    let json: Json = json.parse().unwrap();
 
-    let json = Json::from_str(json).unwrap();
+    // Assert toml == json
     let toml_json = to_json(toml.clone());
     assert!(json == toml_json,
             "expected\n{}\ngot\n{}\n",
-            json.pretty(),
-            toml_json.pretty());
+            serde_json::to_string_pretty(&json).unwrap(),
+            serde_json::to_string_pretty(&toml_json).unwrap());
 
-    let table2 = Parser::new(&toml_string).parse().unwrap();
-    // floats are a little lossy
-    if table2.values().any(|v| v.as_float().is_some()) { return }
-    assert_eq!(toml, Table(table2));
+    // Assert round trip
+    println!("round trip parse: {}", toml);
+    let toml2 = toml.to_string().parse().unwrap();
+    assert_eq!(toml, toml2);
 }
 
 macro_rules! test( ($name:ident, $toml:expr, $json:expr) => (