Reduce usage of unstable features

4 files changed, 26 insertions, 22 deletions

diff --git a/src/display.rs b/src/display.rs
index f1b2a76..0c561e8 100644
--- a/src/display.rs
+++ b/src/display.rs
@@ -138,36 +138,36 @@ mod tests {
 
     #[test]
     fn simple_show() {
-        assert_eq!(String("foo".to_string()).to_string().as_slice(),
+        assert_eq!(String("foo".to_string()).to_string(),
                    "\"foo\"");
-        assert_eq!(Integer(10).to_string().as_slice(),
+        assert_eq!(Integer(10).to_string(),
                    "10");
-        assert_eq!(Float(10.0).to_string().as_slice(),
+        assert_eq!(Float(10.0).to_string(),
                    "10.0");
-        assert_eq!(Float(2.4).to_string().as_slice(),
+        assert_eq!(Float(2.4).to_string(),
                    "2.4");
-        assert_eq!(Boolean(true).to_string().as_slice(),
+        assert_eq!(Boolean(true).to_string(),
                    "true");
-        assert_eq!(Datetime("test".to_string()).to_string().as_slice(),
+        assert_eq!(Datetime("test".to_string()).to_string(),
                    "test");
-        assert_eq!(Array(vec![]).to_string().as_slice(),
+        assert_eq!(Array(vec![]).to_string(),
                    "[]");
-        assert_eq!(Array(vec![Integer(1), Integer(2)]).to_string().as_slice(),
+        assert_eq!(Array(vec![Integer(1), Integer(2)]).to_string(),
                    "[1, 2]");
     }
 
     #[test]
     fn table() {
-        assert_eq!(Table(map! { }).to_string().as_slice(),
+        assert_eq!(Table(map! { }).to_string(),
                    "");
-        assert_eq!(Table(map! { "test" => Integer(2) }).to_string().as_slice(),
+        assert_eq!(Table(map! { "test" => Integer(2) }).to_string(),
                    "test = 2\n");
         assert_eq!(Table(map! {
                         "test" => Integer(2),
                         "test2" => Table(map! {
                             "test" => String("wut".to_string())
                         })
-                   }).to_string().as_slice(),
+                   }).to_string(),
                    "test = 2\n\
                     \n\
                     [test2]\n\
@@ -177,7 +177,7 @@ mod tests {
                         "test2" => Table(map! {
                             "test" => String("wut".to_string())
                         })
-                   }).to_string().as_slice(),
+                   }).to_string(),
                    "test = 2\n\
                     \n\
                     [test2]\n\
@@ -187,7 +187,7 @@ mod tests {
                         "test2" => Array(vec![Table(map! {
                             "test" => String("wut".to_string())
                         })])
-                   }).to_string().as_slice(),
+                   }).to_string(),
                    "test = 2\n\
                     \n\
                     [[test2]]\n\
@@ -195,7 +195,7 @@ mod tests {
         assert_eq!(Table(map! {
                         "foo.bar" => Integer(2),
                         "foo\"bar" => Integer(2)
-                   }).to_string().as_slice(),
+                   }).to_string(),
                    "\"foo\\\"bar\" = 2\n\
                     \"foo.bar\" = 2\n");
     }
diff --git a/src/lib.rs b/src/lib.rs
index afc102d..5c5fa91 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -34,10 +34,9 @@
 //!
 //! [1]: https://github.com/mojombo/toml
 //! [2]: https://github.com/BurntSushi/toml-test
-//!
 
 #![doc(html_root_url = "http://alexcrichton.com/toml-rs")]
-#![feature(collections, core)]
+#![feature(core)]
 #![deny(missing_docs)]
 #![cfg_attr(test, deny(warnings))]
 
@@ -209,7 +208,10 @@ impl FromStr for Value {
     type Err = Vec<ParserError>;
     fn from_str(s: &str) -> Result<Value, Vec<ParserError>> {
         let mut p = Parser::new(s);
-        p.parse().map(Value::Table).ok_or(p.errors)
+        match p.parse().map(Value::Table) {
+            Some(n) => Ok(n),
+            None => Err(p.errors),
+        }
     }
 }
 
diff --git a/src/parser.rs b/src/parser.rs
index 7c991c4..abb4c5c 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -1,3 +1,4 @@
+use std::ascii::AsciiExt;
 use std::char;
 use std::collections::BTreeMap;
 use std::error::Error;
@@ -385,8 +386,9 @@ impl<'a> Parser<'a> {
                 Some((pos, c @ 'u')) |
                 Some((pos, c @ 'U')) => {
                     let len = if c == 'u' {4} else {8};
-                    let num = if me.input.is_char_boundary(pos + 1 + len) {
-                        &me.input[pos + 1 .. pos + 1 + len]
+                    let num = &me.input[pos+1..];
+                    let num = if num.len() >= len && num.is_ascii() {
+                        &num[..len]
                     } else {
                         "invalid"
                     };
@@ -614,7 +616,7 @@ impl<'a> Parser<'a> {
                 lo: start,
                 hi: next,
                 desc: format!("unexpected character: `{}`",
-                             rest.char_at(0)),
+                              rest.chars().next().unwrap()),
             });
             None
         }
diff --git a/src/serialization.rs b/src/serialization.rs
index a7ddaf3..03f9de3 100644
--- a/src/serialization.rs
+++ b/src/serialization.rs
@@ -1062,7 +1062,7 @@ mod tests {
         match a {
             Ok(..) => panic!("should not have decoded"),
             Err(e) => {
-                assert_eq!(format!("{}", e).as_slice(),
+                assert_eq!(format!("{}", e),
                            "expected a value of type `integer`, but \
                             found a value of type `float` for the key `bar`");
             }
@@ -1080,7 +1080,7 @@ mod tests {
         match a {
             Ok(..) => panic!("should not have decoded"),
             Err(e) => {
-                assert_eq!(format!("{}", e).as_slice(),
+                assert_eq!(format!("{}", e),
                            "expected a value of type `integer` for the key `bar`");
             }
         }