std: Clean up primitive integer modules

All of the modules in the standard library were just straight reexports of those
in libcore, so remove all the "macro modules" from the standard library and just
reexport what's in core directly.

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>);
+    }
 
 )}