std: Stop parameterizing some memcpy functions over RawPtr

It unsafe assumptions that any impl of RawPtr is for actual pointers,
that they can be copied by memcpy. Removing it is easy, so I don't
think it's solving a real problem.

Author: brson

src/libstd/cast.rs

@@ -10,7 +10,6 @@
 
 //! Unsafe casting functions
 
-use ptr::RawPtr;
 use mem;
 use unstable::intrinsics;
 use ptr::copy_nonoverlapping_memory;
@@ -72,13 +71,13 @@ pub unsafe fn transmute_region<'a,'b,T>(ptr: &'a T) -> &'b T {
 
 /// Coerce an immutable reference to be mutable.
 #[inline]
-pub unsafe fn transmute_mut_unsafe<T,P:RawPtr<T>>(ptr: P) -> *mut T {
+pub unsafe fn transmute_mut_unsafe<T>(ptr: *T) -> *mut T {
     transmute(ptr)
 }
 
 /// Coerce an immutable reference to be mutable.
 #[inline]
-pub unsafe fn transmute_immut_unsafe<T,P:RawPtr<T>>(ptr: P) -> *T {
+pub unsafe fn transmute_immut_unsafe<T>(ptr: *mut T) -> *T {
     transmute(ptr)
 }
 

src/libstd/ptr.rs

@@ -92,8 +92,8 @@ pub fn is_not_null<T,P:RawPtr<T>>(ptr: P) -> bool { ptr.is_not_null() }
  * and destination may overlap.
  */
 #[inline]
-pub unsafe fn copy_memory<T,P:RawPtr<T>>(dst: *mut T, src: P, count: uint) {
-    intrinsics::copy_memory(dst, cast::transmute_immut_unsafe(src), count)
+pub unsafe fn copy_memory<T>(dst: *mut T, src: *T, count: uint) {
+    intrinsics::copy_memory(dst, src, count)
 }
 
 /**
@@ -103,10 +103,10 @@ pub unsafe fn copy_memory<T,P:RawPtr<T>>(dst: *mut T, src: P, count: uint) {
  * and destination may *not* overlap.
  */
 #[inline]
-pub unsafe fn copy_nonoverlapping_memory<T,P:RawPtr<T>>(dst: *mut T,
-                                                        src: P,
-                                                        count: uint) {
-    intrinsics::copy_nonoverlapping_memory(dst, cast::transmute_immut_unsafe(src), count)
+pub unsafe fn copy_nonoverlapping_memory<T>(dst: *mut T,
+                                            src: *T,
+                                            count: uint) {
+    intrinsics::copy_nonoverlapping_memory(dst, src, count)
 }
 
 /**
@@ -137,9 +137,9 @@ pub unsafe fn swap_ptr<T>(x: *mut T, y: *mut T) {
     let t: *mut T = &mut tmp;
 
     // Perform the swap
-    copy_nonoverlapping_memory(t, x, 1);
-    copy_memory(x, y, 1); // `x` and `y` may overlap
-    copy_nonoverlapping_memory(y, t, 1);
+    copy_nonoverlapping_memory(t, &*x, 1);
+    copy_memory(x, &*y, 1); // `x` and `y` may overlap
+    copy_nonoverlapping_memory(y, &*t, 1);
 
     // y and t now point to the same thing, but we need to completely forget `tmp`
     // because it's no longer relevant.

src/libstd/util.rs

@@ -32,9 +32,9 @@ pub fn swap<T>(x: &mut T, y: &mut T) {
         // Perform the swap, `&mut` pointers never alias
         let x_raw: *mut T = x;
         let y_raw: *mut T = y;
-        ptr::copy_nonoverlapping_memory(t, x_raw, 1);
-        ptr::copy_nonoverlapping_memory(x, y_raw, 1);
-        ptr::copy_nonoverlapping_memory(y, t, 1);
+        ptr::copy_nonoverlapping_memory(t, &*x_raw, 1);
+        ptr::copy_nonoverlapping_memory(x, &*y_raw, 1);
+        ptr::copy_nonoverlapping_memory(y, &*t, 1);
 
         // y and t now point to the same thing, but we need to completely forget `tmp`
         // because it's no longer relevant.

src/libstd/vec.rs

@@ -1548,7 +1548,7 @@ impl<T> OwnedVector<T> for ~[T] {
             let p = self.as_mut_ptr().offset(i as int);
             // Shift everything over to make space. (Duplicating the
             // `i`th element into two consecutive places.)
-            ptr::copy_memory(p.offset(1), p, len - i);
+            ptr::copy_memory(p.offset(1), &*p, len - i);
             // Write it in, overwriting the first copy of the `i`th
             // element.
             mem::move_val_init(&mut *p, x);
@@ -1567,7 +1567,7 @@ impl<T> OwnedVector<T> for ~[T] {
                 let ret = Some(ptr::read_ptr(ptr as *T));
 
                 // Shift everything down to fill in that spot.
-                ptr::copy_memory(ptr, ptr.offset(1), len - i - 1);
+                ptr::copy_memory(ptr, &*ptr.offset(1), len - i - 1);
                 self.set_len(len - 1);
 
                 ret
@@ -1842,7 +1842,7 @@ fn insertion_sort<T>(v: &mut [T], compare: |&T, &T| -> Ordering) {
             if i != j {
                 let tmp = ptr::read_ptr(read_ptr);
                 ptr::copy_memory(buf_v.offset(j + 1),
-                                 buf_v.offset(j),
+                                 &*buf_v.offset(j),
                                  (i - j) as uint);
                 ptr::copy_nonoverlapping_memory(buf_v.offset(j),
                                                 &tmp as *T,
@@ -1920,7 +1920,7 @@ fn merge_sort<T>(v: &mut [T], compare: |&T, &T| -> Ordering) {
                 // that case, `i == j` so we don't copy. The
                 // `.offset(j)` is always in bounds.
                 ptr::copy_memory(buf_dat.offset(j + 1),
-                                 buf_dat.offset(j),
+                                 &*buf_dat.offset(j),
                                  i - j as uint);
                 ptr::copy_nonoverlapping_memory(buf_dat.offset(j), read_ptr, 1);
             }
@@ -1970,11 +1970,11 @@ fn merge_sort<T>(v: &mut [T], compare: |&T, &T| -> Ordering) {
                     if left == right_start {
                         // the number remaining in this run.
                         let elems = (right_end as uint - right as uint) / mem::size_of::<T>();
-                        ptr::copy_nonoverlapping_memory(out, right, elems);
+                        ptr::copy_nonoverlapping_memory(out, &*right, elems);
                         break;
                     } else if right == right_end {
                         let elems = (right_start as uint - left as uint) / mem::size_of::<T>();
-                        ptr::copy_nonoverlapping_memory(out, left, elems);
+                        ptr::copy_nonoverlapping_memory(out, &*left, elems);
                         break;
                     }
 
@@ -1988,7 +1988,7 @@ fn merge_sort<T>(v: &mut [T], compare: |&T, &T| -> Ordering) {
                     } else {
                         step(&mut left)
                     };
-                    ptr::copy_nonoverlapping_memory(out, to_copy, 1);
+                    ptr::copy_nonoverlapping_memory(out, &*to_copy, 1);
                     step(&mut out);
                 }
             }
@@ -2002,7 +2002,7 @@ fn merge_sort<T>(v: &mut [T], compare: |&T, &T| -> Ordering) {
     // write the result to `v` in one go, so that there are never two copies
     // of the same object in `v`.
     unsafe {
-        ptr::copy_nonoverlapping_memory(v.as_mut_ptr(), buf_dat, len);
+        ptr::copy_nonoverlapping_memory(v.as_mut_ptr(), &*buf_dat, len);
     }
 
     // increment the pointer, returning the old pointer.