auto merge of #8069 : erickt/rust/maikklein, r=erickt

Good evening,

This is a superset of @MaikKlein's #7969 commit, that I've fixed up to compile. I had a couple commits I wanted to do on top of @MaikKlein's work that I didn't want to bitrot.

src/test/bench/core-std.rs

@@ -75,7 +75,7 @@ fn read_line() {
         .push_rel(&Path("src/test/bench/shootout-k-nucleotide.data"));
 
     for int::range(0, 3) |_i| {
-        let reader = result::unwrap(io::file_reader(&path));
+        let reader = io::file_reader(&path).unwrap();
         while !reader.eof() {
             reader.read_line();
         }

src/test/bench/shootout-fasta.rs

@@ -124,8 +124,8 @@ fn main() {
     };
 
     let writer = if os::getenv("RUST_BENCH").is_some() {
-        result::unwrap(io::file_writer(&Path("./shootout-fasta.data"),
-                                       [io::Truncate, io::Create]))
+        io::file_writer(&Path("./shootout-fasta.data"),
+                        [io::Truncate, io::Create]).unwrap()
     } else {
         io::stdout()
     };

src/test/bench/shootout-k-nucleotide-pipes.rs

@@ -161,7 +161,7 @@ fn main() {
        // get to this massive data set, but include_bin! chokes on it (#2598)
        let path = Path(env!("CFG_SRC_DIR"))
            .push_rel(&Path("src/test/bench/shootout-k-nucleotide.data"));
-       result::unwrap(io::file_reader(&path))
+       io::file_reader(&path).unwrap()
    } else {
       io::stdin()
    };

src/test/run-fail/result-get-fail.rs

@@ -8,10 +8,10 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// error-pattern:get called on error result: ~"kitty"
+// error-pattern:get called on `Err` result: ~"kitty"
 
 use std::result;
 
 fn main() {
-  error!(result::get(&result::Err::<int,~str>(~"kitty")));
+  error!(result::Err::<int,~str>(~"kitty").get());
 }

src/test/run-pass/cleanup-copy-mode.rs

@@ -16,7 +16,7 @@ use std::task;
 fn adder(x: @int, y: @int) -> int { return *x + *y; }
 fn failer() -> @int { fail!(); }
 pub fn main() {
-    assert!(result::is_err(&task::try(|| {
+    assert!(task::try(|| {
         adder(@2, failer()); ()
-    })));
+    }).is_err());
 }

src/test/run-pass/issue-4016.rs

@@ -11,14 +11,13 @@
 
 extern mod extra;
 
-use std::result;
 use extra::json;
 use extra::serialize::Decodable;
 
 trait JD : Decodable<json::Decoder> { }
 
 fn exec<T: JD>() {
-    let doc = result::unwrap(json::from_str(""));
+    let doc = json::from_str("").unwrap();
     let mut decoder = json::Decoder(doc);
     let _v: T = Decodable::decode(&mut decoder);
     fail!()