libstd: Remove unnecessary re-exports under std::std

src/libstd/io/fs.rs

@@ -859,7 +859,7 @@ mod test {
     })
 
     iotest!(fn file_test_io_seek_shakedown() {
-        use std::str;          // 01234567890123
+        use str;          // 01234567890123
         let initial_msg =   "qwer-asdf-zxcv";
         let chunk_one: &str = "qwer";
         let chunk_two: &str = "asdf";
@@ -947,7 +947,7 @@ mod test {
     })
 
     iotest!(fn file_test_directoryinfo_readdir() {
-        use std::str;
+        use str;
         let tmpdir = tmpdir();
         let dir = &tmpdir.join("di_readdir");
         check!(mkdir(dir, io::UserRWX));

src/libstd/io/process.rs

@@ -14,7 +14,7 @@
 
 use prelude::*;
 
-use std::str;
+use str;
 use fmt;
 use io::IoResult;
 use io;

src/libstd/lib.rs

@@ -266,24 +266,21 @@ pub mod rt;
 // can be resolved within libstd.
 #[doc(hidden)]
 mod std {
+    // mods used for deriving
     pub use clone;
     pub use cmp;
-    pub use comm;
-    pub use fmt;
     pub use hash;
-    pub use io;
-    pub use kinds;
-    pub use local_data;
-    pub use option;
-    pub use os;
-    pub use rt;
-    pub use str;
-    pub use to_str;
-    pub use ty;
-    pub use unstable;
-    pub use vec;
 
+    pub use comm; // used for select!()
+    pub use fmt; // used for any formatting strings
+    pub use io; // used for println!()
+    pub use local_data; // used for local_data_key!()
+    pub use option; // used for bitflags!()
+    pub use rt; // used for fail!()
+    pub use vec; // used for vec![]
+
+    // The test runner calls ::std::os::args() but really wants realstd
+    #[cfg(test)] pub use os = realstd::os;
     // The test runner requires std::slice::Vector, so re-export std::slice just for it.
     #[cfg(test)] pub use slice;
-    #[cfg(test)] pub use string;
 }

src/libstd/os.rs

@@ -1328,7 +1328,7 @@ impl Drop for MemoryMap {
 
 #[cfg(target_os = "linux")]
 pub mod consts {
-    pub use std::os::arch_consts::ARCH;
+    pub use os::arch_consts::ARCH;
 
     pub static FAMILY: &'static str = "unix";
 
@@ -1359,7 +1359,7 @@ pub mod consts {
 
 #[cfg(target_os = "macos")]
 pub mod consts {
-    pub use std::os::arch_consts::ARCH;
+    pub use os::arch_consts::ARCH;
 
     pub static FAMILY: &'static str = "unix";
 
@@ -1390,7 +1390,7 @@ pub mod consts {
 
 #[cfg(target_os = "freebsd")]
 pub mod consts {
-    pub use std::os::arch_consts::ARCH;
+    pub use os::arch_consts::ARCH;
 
     pub static FAMILY: &'static str = "unix";
 
@@ -1421,7 +1421,7 @@ pub mod consts {
 
 #[cfg(target_os = "android")]
 pub mod consts {
-    pub use std::os::arch_consts::ARCH;
+    pub use os::arch_consts::ARCH;
 
     pub static FAMILY: &'static str = "unix";
 
@@ -1452,7 +1452,7 @@ pub mod consts {
 
 #[cfg(target_os = "win32")]
 pub mod consts {
-    pub use std::os::arch_consts::ARCH;
+    pub use os::arch_consts::ARCH;
 
     pub static FAMILY: &'static str = "windows";