diff --git a/src/libcore/num/i16.rs b/src/libcore/num/i16.rs
index dacb4ebcdfa3a..4054497941797 100644
--- a/src/libcore/num/i16.rs
+++ b/src/libcore/num/i16.rs
@@ -8,7 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for signed 16-bits integers (`i16` type)
+//! The 16-bit signed integer type.
+//!
+//! *[See also the `i16` primitive type](../primitive.i16.html).*
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
diff --git a/src/libcore/num/i32.rs b/src/libcore/num/i32.rs
index 250d66de70b34..5d2ade8d8e0e9 100644
--- a/src/libcore/num/i32.rs
+++ b/src/libcore/num/i32.rs
@@ -8,7 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for signed 32-bits integers (`i32` type)
+//! The 32-bit signed integer type.
+//!
+//! *[See also the `i32` primitive type](../primitive.i32.html).*
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
diff --git a/src/libcore/num/i64.rs b/src/libcore/num/i64.rs
index 5ed21d7246cd0..b1d43a3b83872 100644
--- a/src/libcore/num/i64.rs
+++ b/src/libcore/num/i64.rs
@@ -8,7 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for signed 64-bits integers (`i64` type)
+//! The 64-bit signed integer type.
+//!
+//! *[See also the `i64` primitive type](../primitive.i64.html).*
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
diff --git a/src/libcore/num/i8.rs b/src/libcore/num/i8.rs
index 0394c12d5c457..ee003d92b2823 100644
--- a/src/libcore/num/i8.rs
+++ b/src/libcore/num/i8.rs
@@ -8,7 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for signed 8-bits integers (`i8` type)
+//! The 8-bit signed integer type.
+//!
+//! *[See also the `i8` primitive type](../primitive.i8.html).*
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
diff --git a/src/libcore/num/isize.rs b/src/libcore/num/isize.rs
index 066cb10cce265..034a5c0eb89d4 100644
--- a/src/libcore/num/isize.rs
+++ b/src/libcore/num/isize.rs
@@ -8,7 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for pointer-sized signed integers (`isize` type)
+//! The pointer-sized signed integer type.
+//!
+//! *[See also the `isize` primitive type](../primitive.isize.html).*
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
diff --git a/src/libcore/num/u16.rs b/src/libcore/num/u16.rs
index ecf799448483c..68e50e8a400ea 100644
--- a/src/libcore/num/u16.rs
+++ b/src/libcore/num/u16.rs
@@ -8,7 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for unsigned 16-bits integers (`u16` type)
+//! The 16-bit unsigned integer type.
+//!
+//! *[See also the `u16` primitive type](../primitive.u16.html).*
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
diff --git a/src/libcore/num/u32.rs b/src/libcore/num/u32.rs
index b0682b55ac05d..c1ee96b363c27 100644
--- a/src/libcore/num/u32.rs
+++ b/src/libcore/num/u32.rs
@@ -8,7 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for unsigned 32-bits integers (`u32` type)
+//! The 32-bit unsigned integer type.
+//!
+//! *[See also the `u32` primitive type](../primitive.u32.html).*
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
diff --git a/src/libcore/num/u64.rs b/src/libcore/num/u64.rs
index dbc6a64a905d2..c0d18d850a796 100644
--- a/src/libcore/num/u64.rs
+++ b/src/libcore/num/u64.rs
@@ -8,7 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for unsigned 64-bits integer (`u64` type)
+//! The 64-bit unsigned integer type.
+//!
+//! *[See also the `u64` primitive type](../primitive.u64.html).*
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
diff --git a/src/libcore/num/u8.rs b/src/libcore/num/u8.rs
index bf9347ca62c92..a60c480d810ea 100644
--- a/src/libcore/num/u8.rs
+++ b/src/libcore/num/u8.rs
@@ -8,7 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for unsigned 8-bits integers (`u8` type)
+//! The 8-bit unsigned integer type.
+//!
+//! *[See also the `u8` primitive type](../primitive.u8.html).*
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
diff --git a/src/libcore/num/usize.rs b/src/libcore/num/usize.rs
index 67e3c954ab695..70e790106e1c6 100644
--- a/src/libcore/num/usize.rs
+++ b/src/libcore/num/usize.rs
@@ -8,7 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for pointer-sized unsigned integers (`usize` type)
+//! The pointer-sized unsigned integer type.
+//!
+//! *[See also the `usize` primitive type](../primitive.usize.html).*
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
diff --git a/src/libcoretest/num/uint_macros.rs b/src/libcoretest/num/uint_macros.rs
index 1712345f9d9a7..6238c6d43e353 100644
--- a/src/libcoretest/num/uint_macros.rs
+++ b/src/libcoretest/num/uint_macros.rs
@@ -14,6 +14,7 @@ mod tests {
     use core::$T_i::*;
     use num;
     use core::ops::{BitOr, BitAnd, BitXor, Shl, Shr, Not};
+    use std::str;
 
     #[test]
     fn test_overflows() {
@@ -121,6 +122,35 @@ mod tests {
         assert!((10 as $T).checked_div(2) == Some(5));
         assert!((5 as $T).checked_div(0) == None);
     }
-}
+
+    fn from_str<T: FromStr>(t: &str) -> Option<T> {
+        FromStr::from_str(t).ok()
+    }
+
+    #[test]
+    pub fn test_from_str() {
+        assert_eq!(from_str::<$T>("0"), Some(0 as $T));
+        assert_eq!(from_str::<$T>("3"), Some(3 as $T));
+        assert_eq!(from_str::<$T>("10"), Some(10 as $T));
+        assert_eq!(from_str::<u32>("123456789"), Some(123456789 as u32));
+        assert_eq!(from_str::<$T>("00100"), Some(100 as $T));
+
+        assert_eq!(from_str::<$T>(""), None);
+        assert_eq!(from_str::<$T>(" "), None);
+        assert_eq!(from_str::<$T>("x"), None);
+    }
+
+    #[test]
+    pub fn test_parse_bytes() {
+        assert_eq!($T::from_str_radix("123", 10), Ok(123 as $T));
+        assert_eq!($T::from_str_radix("1001", 2), Ok(9 as $T));
+        assert_eq!($T::from_str_radix("123", 8), Ok(83 as $T));
+        assert_eq!(u16::from_str_radix("123", 16), Ok(291 as u16));
+        assert_eq!(u16::from_str_radix("ffff", 16), Ok(65535 as u16));
+        assert_eq!($T::from_str_radix("z", 36), Ok(35 as $T));
+
+        assert_eq!($T::from_str_radix("Z", 10).ok(), None::<$T>);
+        assert_eq!($T::from_str_radix("_", 2).ok(), None::<$T>);
+    }
 
 )}
diff --git a/src/libstd/lib.rs b/src/libstd/lib.rs
index 655fa04c2644e..8fed380a5b468 100644
--- a/src/libstd/lib.rs
+++ b/src/libstd/lib.rs
@@ -253,7 +253,6 @@
 // Don't link to std. We are std.
 #![no_std]
 
-#![allow(trivial_casts)]
 #![deny(missing_docs)]
 
 #[cfg(test)] extern crate test;
@@ -263,7 +262,7 @@
 // imported by the compiler (via our #[no_std] attribute) In this case we just
 // add a new crate name so we can attach the reexports to it.
 #[macro_reexport(assert, assert_eq, debug_assert, debug_assert_eq,
-    unreachable, unimplemented, write, writeln)]
+                 unreachable, unimplemented, write, writeln)]
 extern crate core as __core;
 
 #[macro_use]
@@ -307,7 +306,6 @@ pub use core_collections::fmt;
 pub use core_collections::slice;
 pub use core_collections::str;
 pub use core_collections::string;
-#[stable(feature = "rust1", since = "1.0.0")]
 pub use core_collections::vec;
 
 pub use rustc_unicode::char;
@@ -326,32 +324,21 @@ pub mod prelude;
 
 /* Primitive types */
 
-// NB: slice and str are primitive types too, but their module docs + primitive doc pages
-// are inlined from the public re-exports of core_collections::{slice, str} above.
-
-#[path = "num/float_macros.rs"]
-#[macro_use]
-mod float_macros;
-
-#[path = "num/int_macros.rs"]
-#[macro_use]
-mod int_macros;
-
-#[path = "num/uint_macros.rs"]
-#[macro_use]
-mod uint_macros;
-
-#[path = "num/isize.rs"]  pub mod isize;
-#[path = "num/i8.rs"]   pub mod i8;
-#[path = "num/i16.rs"]  pub mod i16;
-#[path = "num/i32.rs"]  pub mod i32;
-#[path = "num/i64.rs"]  pub mod i64;
-
-#[path = "num/usize.rs"] pub mod usize;
-#[path = "num/u8.rs"]   pub mod u8;
-#[path = "num/u16.rs"]  pub mod u16;
-#[path = "num/u32.rs"]  pub mod u32;
-#[path = "num/u64.rs"]  pub mod u64;
+// NB: slice and str are primitive types too, but their module docs + primitive
+// doc pages are inlined from the public re-exports of core_collections::{slice,
+// str} above.
+
+pub use core::isize;
+pub use core::i8;
+pub use core::i16;
+pub use core::i32;
+pub use core::i64;
+
+pub use core::usize;
+pub use core::u8;
+pub use core::u16;
+pub use core::u32;
+pub use core::u64;
 
 #[path = "num/f32.rs"]   pub mod f32;
 #[path = "num/f64.rs"]   pub mod f64;
diff --git a/src/libstd/macros.rs b/src/libstd/macros.rs
index eb378bf408028..53a14c2b21b17 100644
--- a/src/libstd/macros.rs
+++ b/src/libstd/macros.rs
@@ -197,6 +197,15 @@ macro_rules! log {
     )
 }
 
+#[cfg(test)]
+macro_rules! assert_approx_eq {
+    ($a:expr, $b:expr) => ({
+        let (a, b) = (&$a, &$b);
+        assert!((*a - *b).abs() < 1.0e-6,
+                "{} is not approximately equal to {}", *a, *b);
+    })
+}
+
 /// Built-in macros to the compiler itself.
 ///
 /// These macros do not have any corresponding definition with a `macro_rules!`
diff --git a/src/libstd/num/float_macros.rs b/src/libstd/num/float_macros.rs
deleted file mode 100644
index 16ad21a07d700..0000000000000
--- a/src/libstd/num/float_macros.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-#![doc(hidden)]
-
-macro_rules! assert_approx_eq {
-    ($a:expr, $b:expr) => ({
-        let (a, b) = (&$a, &$b);
-        assert!((*a - *b).abs() < 1.0e-6,
-                "{} is not approximately equal to {}", *a, *b);
-    })
-}
diff --git a/src/libstd/num/i16.rs b/src/libstd/num/i16.rs
deleted file mode 100644
index eb53e0821f2a6..0000000000000
--- a/src/libstd/num/i16.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! The 16-bit signed integer type.
-//!
-//! *[See also the `i16` primitive type](../primitive.i16.html).*
-
-#![stable(feature = "rust1", since = "1.0.0")]
-
-pub use core::i16::{BITS, BYTES, MIN, MAX};
-
-int_module! { i16 }
diff --git a/src/libstd/num/i32.rs b/src/libstd/num/i32.rs
deleted file mode 100644
index 3c9eedf38c7cd..0000000000000
--- a/src/libstd/num/i32.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! The 32-bit signed integer type.
-//!
-//! *[See also the `i32` primitive type](../primitive.i32.html).*
-
-#![stable(feature = "rust1", since = "1.0.0")]
-
-pub use core::i32::{BITS, BYTES, MIN, MAX};
-
-int_module! { i32 }
diff --git a/src/libstd/num/i64.rs b/src/libstd/num/i64.rs
deleted file mode 100644
index 2df7478a820bf..0000000000000
--- a/src/libstd/num/i64.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! The 64-bit signed integer type.
-//!
-//! *[See also the `i64` primitive type](../primitive.i64.html).*
-
-#![stable(feature = "rust1", since = "1.0.0")]
-
-pub use core::i64::{BITS, BYTES, MIN, MAX};
-
-int_module! { i64 }
diff --git a/src/libstd/num/i8.rs b/src/libstd/num/i8.rs
deleted file mode 100644
index 4e4bee8a791e4..0000000000000
--- a/src/libstd/num/i8.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! The 8-bit signed integer type.
-//!
-//! *[See also the `i8` primitive type](../primitive.i8.html).*
-
-#![stable(feature = "rust1", since = "1.0.0")]
-
-pub use core::i8::{BITS, BYTES, MIN, MAX};
-
-int_module! { i8 }
diff --git a/src/libstd/num/int_macros.rs b/src/libstd/num/int_macros.rs
deleted file mode 100644
index 178fad09f9881..0000000000000
--- a/src/libstd/num/int_macros.rs
+++ /dev/null
@@ -1,15 +0,0 @@
-// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-#![doc(hidden)]
-
-macro_rules! int_module { ($T:ty) => (
-
-) }
diff --git a/src/libstd/num/isize.rs b/src/libstd/num/isize.rs
deleted file mode 100644
index d46b6b80d0d25..0000000000000
--- a/src/libstd/num/isize.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! The pointer-sized signed integer type.
-//!
-//! *[See also the `isize` primitive type](../primitive.isize.html).*
-
-#![stable(feature = "rust1", since = "1.0.0")]
-
-pub use core::isize::{BITS, BYTES, MIN, MAX};
-
-int_module! { isize }
diff --git a/src/libstd/num/u16.rs b/src/libstd/num/u16.rs
deleted file mode 100644
index 893618aeffafd..0000000000000
--- a/src/libstd/num/u16.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! The 16-bit unsigned integer type.
-//!
-//! *[See also the `u16` primitive type](../primitive.u16.html).*
-
-#![stable(feature = "rust1", since = "1.0.0")]
-
-pub use core::u16::{BITS, BYTES, MIN, MAX};
-
-uint_module! { u16 }
diff --git a/src/libstd/num/u32.rs b/src/libstd/num/u32.rs
deleted file mode 100644
index 2da2551969657..0000000000000
--- a/src/libstd/num/u32.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! The 32-bit unsigned integer type.
-//!
-//! *[See also the `u32` primitive type](../primitive.u32.html).*
-
-#![stable(feature = "rust1", since = "1.0.0")]
-
-pub use core::u32::{BITS, BYTES, MIN, MAX};
-
-uint_module! { u32 }
diff --git a/src/libstd/num/u64.rs b/src/libstd/num/u64.rs
deleted file mode 100644
index 26a8b53739403..0000000000000
--- a/src/libstd/num/u64.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! The 64-bit unsigned integer type.
-//!
-//! *[See also the `u64` primitive type](../primitive.u64.html).*
-
-#![stable(feature = "rust1", since = "1.0.0")]
-
-pub use core::u64::{BITS, BYTES, MIN, MAX};
-
-uint_module! { u64 }
diff --git a/src/libstd/num/u8.rs b/src/libstd/num/u8.rs
deleted file mode 100644
index 385754b93a04b..0000000000000
--- a/src/libstd/num/u8.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! The 8-bit unsigned integer type.
-//!
-//! *[See also the `u8` primitive type](../primitive.u8.html).*
-
-#![stable(feature = "rust1", since = "1.0.0")]
-
-pub use core::u8::{BITS, BYTES, MIN, MAX};
-
-uint_module! { u8 }
diff --git a/src/libstd/num/uint_macros.rs b/src/libstd/num/uint_macros.rs
deleted file mode 100644
index 902c78c0a46f8..0000000000000
--- a/src/libstd/num/uint_macros.rs
+++ /dev/null
@@ -1,50 +0,0 @@
-// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-#![doc(hidden)]
-
-macro_rules! uint_module { ($T:ident) => (
-
-#[cfg(test)]
-mod tests {
-    use prelude::v1::*;
-
-    fn from_str<T: ::str::FromStr>(t: &str) -> Option<T> {
-        ::str::FromStr::from_str(t).ok()
-    }
-
-    #[test]
-    pub fn test_from_str() {
-        assert_eq!(from_str::<$T>("0"), Some(0 as $T));
-        assert_eq!(from_str::<$T>("3"), Some(3 as $T));
-        assert_eq!(from_str::<$T>("10"), Some(10 as $T));
-        assert_eq!(from_str::<u32>("123456789"), Some(123456789 as u32));
-        assert_eq!(from_str::<$T>("00100"), Some(100 as $T));
-
-        assert_eq!(from_str::<$T>(""), None);
-        assert_eq!(from_str::<$T>(" "), None);
-        assert_eq!(from_str::<$T>("x"), None);
-    }
-
-    #[test]
-    pub fn test_parse_bytes() {
-        assert_eq!($T::from_str_radix("123", 10), Ok(123 as $T));
-        assert_eq!($T::from_str_radix("1001", 2), Ok(9 as $T));
-        assert_eq!($T::from_str_radix("123", 8), Ok(83 as $T));
-        assert_eq!(u16::from_str_radix("123", 16), Ok(291 as u16));
-        assert_eq!(u16::from_str_radix("ffff", 16), Ok(65535 as u16));
-        assert_eq!($T::from_str_radix("z", 36), Ok(35 as $T));
-
-        assert_eq!($T::from_str_radix("Z", 10).ok(), None::<$T>);
-        assert_eq!($T::from_str_radix("_", 2).ok(), None::<$T>);
-    }
-}
-
-) }
diff --git a/src/libstd/num/usize.rs b/src/libstd/num/usize.rs
deleted file mode 100644
index 6960ba3b8296b..0000000000000
--- a/src/libstd/num/usize.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! The pointer-sized unsigned integer type.
-//!
-//! *[See also the `usize` primitive type](../primitive.usize.html).*
-
-#![stable(feature = "rust1", since = "1.0.0")]
-
-pub use core::usize::{BITS, BYTES, MIN, MAX};
-
-uint_module! { usize }