core: Add unwrap()/unwrap_err() methods to Result

These implementations must live in libstd right now because the fmt module has
not been migrated yet. This will occur in a later PR.

Just to be clear, there are new extension traits, but they are not necessary
once the std::fmt module has migrated to libcore, which is a planned migration
in the future.

Author: alexcrichton

src/libstd/fmt/num.rs

@@ -400,6 +400,7 @@ mod bench {
         use super::test::Bencher;
         use fmt::radix;
         use rand::{XorShiftRng, Rng};
+        use realstd::result::ResultUnwrap;
 
         #[bench]
         fn format_bin(b: &mut Bencher) {
@@ -436,6 +437,7 @@ mod bench {
         use super::test::Bencher;
         use fmt::radix;
         use rand::{XorShiftRng, Rng};
+        use realstd::result::ResultUnwrap;
 
         #[bench]
         fn format_bin(b: &mut Bencher) {

src/libstd/io/buffered.rs

@@ -16,7 +16,7 @@ use io::{Reader, Writer, Stream, Buffer, DEFAULT_BUF_SIZE, IoResult};
 use iter::ExactSize;
 use ops::Drop;
 use option::{Some, None, Option};
-use result::{Ok, Err};
+use result::{Ok, Err, ResultUnwrap};
 use slice::{ImmutableVector, MutableVector};
 use slice;
 use vec::Vec;

src/libstd/io/fs.rs

@@ -1335,7 +1335,7 @@ mod test {
         use rand::{StdRng, Rng};
 
         let mut bytes = [0, ..1024];
-        StdRng::new().unwrap().fill_bytes(bytes);
+        StdRng::new().ok().unwrap().fill_bytes(bytes);
 
         let tmpdir = tmpdir();
 

src/libstd/io/net/udp.rs

@@ -358,6 +358,8 @@ mod test {
     })
 
     pub fn socket_name(addr: SocketAddr) {
+        use result::ResultUnwrap;
+
         let server = UdpSocket::bind(addr);
 
         assert!(server.is_ok());

src/libstd/io/stdio.rs

@@ -36,7 +36,7 @@ use mem::replace;
 use option::{Option, Some, None};
 use owned::Box;
 use prelude::drop;
-use result::{Ok, Err};
+use result::{Ok, Err, ResultUnwrap};
 use rt;
 use rt::local::Local;
 use rt::rtio::{DontClose, IoFactory, LocalIo, RtioFileStream, RtioTTY};

src/libstd/io/tempfile.rs

@@ -18,7 +18,7 @@ use ops::Drop;
 use option::{Option, None, Some};
 use os;
 use path::{Path, GenericPath};
-use result::{Ok, Err};
+use result::{Ok, Err, ResultUnwrap};
 use sync::atomics;
 
 /// A wrapper for a path to temporary directory implementing automatic

src/libstd/num/strconv.rs

@@ -820,6 +820,7 @@ mod bench {
         use super::test::Bencher;
         use rand::{XorShiftRng, Rng};
         use num::ToStrRadix;
+        use realstd::result::ResultUnwrap;
 
         #[bench]
         fn to_str_bin(b: &mut Bencher) {
@@ -856,6 +857,7 @@ mod bench {
         use super::test::Bencher;
         use rand::{XorShiftRng, Rng};
         use num::ToStrRadix;
+        use realstd::result::ResultUnwrap;
 
         #[bench]
         fn to_str_bin(b: &mut Bencher) {
@@ -892,6 +894,7 @@ mod bench {
         use super::test::Bencher;
         use rand::{XorShiftRng, Rng};
         use f64;
+        use realstd::result::ResultUnwrap;
 
         #[bench]
         fn float_to_str(b: &mut Bencher) {

src/libstd/prelude.rs

@@ -69,6 +69,7 @@ pub use owned::Box;
 pub use path::{GenericPath, Path, PosixPath, WindowsPath};
 pub use ptr::RawPtr;
 pub use io::{Buffer, Writer, Reader, Seek};
+pub use result::{ResultUnwrap, ResultUnwrapErr};
 pub use str::{Str, StrVector, StrSlice, OwnedStr, IntoMaybeOwned};
 pub use str::{StrAllocating};
 pub use to_str::{ToStr, IntoStr};

src/libstd/repr.rs

@@ -25,7 +25,7 @@ use option::{Some, None, Option};
 use ptr::RawPtr;
 use reflect;
 use reflect::{MovePtr, align};
-use result::{Ok, Err};
+use result::{Ok, Err, ResultUnwrap};
 use str::StrSlice;
 use to_str::ToStr;
 use slice::Vector;