std: Second pass stabilization for `ptr`

This commit performs a second pass for stabilization over the `std::ptr` module.
The specific actions taken were:

* The `RawPtr` trait was renamed to `PtrExt`
* The `RawMutPtr` trait was renamed to `MutPtrExt`
* The module name `ptr` is now stable.
* These functions were all marked `#[stable]` with no modification:
  * `null`
  * `null_mut`
  * `swap`
  * `replace`
  * `read`
  * `write`
  * `PtrExt::is_null`
  * `PtrExt::offset`
* These functions remain unstable:
  * `as_ref`, `as_mut` - the return value of an `Option` is not fully expressive
                         as null isn't the only bad value, and it's unclear
                         whether we want to commit to these functions at this
                         time. The reference/lifetime semantics as written are
                         also problematic in how they encourage arbitrary
                         lifetimes.
  * `zero_memory` - This function is currently not used at all in the
                    distribution, and in general it plays a broader role in the
                    "working with unsafe pointers" story. This story is not yet
                    fully developed, so at this time the function remains
                    unstable for now.
  * `read_and_zero` - This function remains unstable for largely the same
                      reasons as `zero_memory`.
* These functions are now all deprecated:
  * `PtrExt::null` - call `ptr::null` or `ptr::null_mut` instead.
  * `PtrExt::to_uint` - use an `as` expression instead.
  * `PtrExt::is_not_null` - use `!p.is_null()` instead.

8 files changed, 9 insertions, 8 deletions

diff --git a/src/libstd/c_vec.rs b/src/libstd/c_vec.rs
index f4338815f75..0aa51ee66ed 100644
--- a/src/libstd/c_vec.rs
+++ b/src/libstd/c_vec.rs
@@ -40,7 +40,7 @@ use mem;
 use ops::{Drop, FnOnce};
 use option::Option;
 use option::Option::{Some, None};
-use ptr::RawPtr;
+use ptr::PtrExt;
 use ptr;
 use raw;
 use slice::AsSlice;
diff --git a/src/libstd/collections/hash/table.rs b/src/libstd/collections/hash/table.rs
index 3ae3a8ffbad..86c0fc708a5 100644
--- a/src/libstd/collections/hash/table.rs
+++ b/src/libstd/collections/hash/table.rs
@@ -23,7 +23,7 @@ use num::{Int, UnsignedInt};
 use ops::{Deref, DerefMut, Drop};
 use option::Option;
 use option::Option::{Some, None};
-use ptr::{Unique, RawPtr, copy_nonoverlapping_memory, zero_memory};
+use ptr::{Unique, PtrExt, copy_nonoverlapping_memory, zero_memory};
 use ptr;
 use rt::heap::{allocate, deallocate};
 
diff --git a/src/libstd/io/extensions.rs b/src/libstd/io/extensions.rs
index c1f1a5b7869..e8765e3c231 100644
--- a/src/libstd/io/extensions.rs
+++ b/src/libstd/io/extensions.rs
@@ -22,7 +22,7 @@ use num::Int;
 use ops::FnOnce;
 use option::Option;
 use option::Option::{Some, None};
-use ptr::RawPtr;
+use ptr::PtrExt;
 use result::Result::{Ok, Err};
 use slice::{SliceExt, AsSlice};
 
diff --git a/src/libstd/io/mod.rs b/src/libstd/io/mod.rs
index b6f8bb25b65..ada57bde74c 100644
--- a/src/libstd/io/mod.rs
+++ b/src/libstd/io/mod.rs
@@ -935,7 +935,7 @@ impl<'a> Reader for &'a mut (Reader+'a) {
 // API yet. If so, it should be a method on Vec.
 unsafe fn slice_vec_capacity<'a, T>(v: &'a mut Vec<T>, start: uint, end: uint) -> &'a mut [T] {
     use raw::Slice;
-    use ptr::RawPtr;
+    use ptr::PtrExt;
 
     assert!(start <= end);
     assert!(end <= v.capacity());
diff --git a/src/libstd/os.rs b/src/libstd/os.rs
index ceb9a4102f6..04f66c2c171 100644
--- a/src/libstd/os.rs
+++ b/src/libstd/os.rs
@@ -46,7 +46,8 @@ use option::Option;
 use option::Option::{Some, None};
 use path::{Path, GenericPath, BytesContainer};
 use sys;
-use ptr::RawPtr;
+use sys::os as os_imp;
+use ptr::PtrExt;
 use ptr;
 use result::Result;
 use result::Result::{Err, Ok};
diff --git a/src/libstd/prelude.rs b/src/libstd/prelude.rs
index d1540f98a23..fc59f06ae6c 100644
--- a/src/libstd/prelude.rs
+++ b/src/libstd/prelude.rs
@@ -73,7 +73,7 @@
 #[doc(no_inline)] pub use option::Option;
 #[doc(no_inline)] pub use option::Option::{Some, None};
 #[doc(no_inline)] pub use path::{GenericPath, Path, PosixPath, WindowsPath};
-#[doc(no_inline)] pub use ptr::{RawPtr, RawMutPtr};
+#[doc(no_inline)] pub use ptr::{PtrExt, MutPtrExt};
 #[doc(no_inline)] pub use result::Result;
 #[doc(no_inline)] pub use result::Result::{Ok, Err};
 #[doc(no_inline)] pub use io::{Buffer, Writer, Reader, Seek, BufferPrelude};
diff --git a/src/libstd/sys/common/net.rs b/src/libstd/sys/common/net.rs
index 382f6875b28..793e81e1ab5 100644
--- a/src/libstd/sys/common/net.rs
+++ b/src/libstd/sys/common/net.rs
@@ -269,7 +269,7 @@ pub fn get_host_addresses(host: Option<&str>, servname: Option<&str>,
     // Collect all the results we found
     let mut addrs = Vec::new();
     let mut rp = res;
-    while rp.is_not_null() {
+    while !rp.is_null() {
         unsafe {
             let addr = try!(sockaddr_to_addr(mem::transmute((*rp).ai_addr),
                                              (*rp).ai_addrlen as uint));
diff --git a/src/libstd/sys/unix/backtrace.rs b/src/libstd/sys/unix/backtrace.rs
index 983d0e5fa14..ddae9a132c3 100644
--- a/src/libstd/sys/unix/backtrace.rs
+++ b/src/libstd/sys/unix/backtrace.rs
@@ -244,7 +244,7 @@ fn print(w: &mut Writer, idx: int, addr: *mut libc::c_void) -> IoResult<()> {
     use iter::{Iterator, IteratorExt};
     use os;
     use path::GenericPath;
-    use ptr::RawPtr;
+    use ptr::PtrExt;
     use ptr;
     use slice::SliceExt;