Auto merge of #21543 - alexcrichton:old-io, r=aturon

In preparation for the I/O rejuvination of the standard library, this commit
renames the current `io` module to `old_io` in order to make room for the new
I/O modules. It is expected that the I/O RFCs will land incrementally over time
instead of all at once, and this provides a fresh clean path for new modules to
enter into as well as guaranteeing that all old infrastructure will remain in
place for some time.

As each `old_io` module is replaced it will be deprecated in-place for new
structures in `std::{io, fs, net}` (as appropriate).

This commit does *not* leave a reexport of `old_io as io` as the deprecation
lint does not currently warn on this form of use. This is quite a large breaking
change for all imports in existing code, but all functionality is retained
precisely as-is and path statements simply need to be renamed from `io` to
`old_io`.

[breaking-change]

1 files changed, 7 insertions, 7 deletions

diff --git a/src/libstd/sys/windows/process.rs b/src/libstd/sys/windows/process.rs
index 1b837385d1e..43f9e805db1 100644
--- a/src/libstd/sys/windows/process.rs
+++ b/src/libstd/sys/windows/process.rs
@@ -14,10 +14,10 @@ use collections;
 use ffi::CString;
 use hash::Hash;
 use collections::hash_map::Hasher;
-use io::fs::PathExtensions;
-use io::process::{ProcessExit, ExitStatus, ExitSignal};
-use io::{IoResult, IoError};
-use io;
+use old_io::fs::PathExtensions;
+use old_io::process::{ProcessExit, ExitStatus, ExitSignal};
+use old_io::{IoResult, IoError};
+use old_io;
 use libc::{pid_t, c_void, c_int};
 use libc;
 use mem;
@@ -84,7 +84,7 @@ impl Process {
                     Err(super::last_error())
                 } else if status != libc::STILL_ACTIVE {
                     Err(IoError {
-                        kind: io::InvalidInput,
+                        kind: old_io::InvalidInput,
                         desc: "no process to kill",
                         detail: None,
                     })
@@ -97,7 +97,7 @@ impl Process {
                 super::mkerr_winbool(ret)
             }
             _ => Err(IoError {
-                kind: io::IoUnavailable,
+                kind: old_io::IoUnavailable,
                 desc: "unsupported signal on windows",
                 detail: None,
             })
@@ -133,7 +133,7 @@ impl Process {
 
         if cfg.gid().is_some() || cfg.uid().is_some() {
             return Err(IoError {
-                kind: io::IoUnavailable,
+                kind: old_io::IoUnavailable,
                 desc: "unsupported gid/uid requested on windows",
                 detail: None,
             })