std: Reorder definitions in cast

Prioritize `transmute` and `forget`.

Author: brson

src/libcore/cast.rs

@@ -14,25 +14,6 @@ use mem;
 use intrinsics;
 use ptr::copy_nonoverlapping_memory;
 
-/// Casts the value at `src` to U. The two types must have the same length.
-#[inline]
-pub unsafe fn transmute_copy<T, U>(src: &T) -> U {
-    let mut dest: U = mem::uninit();
-    let dest_ptr: *mut u8 = transmute(&mut dest);
-    let src_ptr: *u8 = transmute(src);
-    copy_nonoverlapping_memory(dest_ptr, src_ptr, mem::size_of::<U>());
-    dest
-}
-
-/**
- * Move a thing into the void
- *
- * The forget function will take ownership of the provided value but neglect
- * to run any required cleanup or memory-management operations on it.
- */
-#[inline]
-pub unsafe fn forget<T>(thing: T) { intrinsics::forget(thing); }
-
 /**
  * Transform a value of one type into a value of another type.
  * Both types must have the same size and alignment.
@@ -51,6 +32,25 @@ pub unsafe fn transmute<L, G>(thing: L) -> G {
     intrinsics::transmute(thing)
 }
 
+/**
+ * Move a thing into the void
+ *
+ * The forget function will take ownership of the provided value but neglect
+ * to run any required cleanup or memory-management operations on it.
+ */
+#[inline]
+pub unsafe fn forget<T>(thing: T) { intrinsics::forget(thing); }
+
+/// Casts the value at `src` to U. The two types must have the same length.
+#[inline]
+pub unsafe fn transmute_copy<T, U>(src: &T) -> U {
+    let mut dest: U = mem::uninit();
+    let dest_ptr: *mut u8 = transmute(&mut dest);
+    let src_ptr: *u8 = transmute(src);
+    copy_nonoverlapping_memory(dest_ptr, src_ptr, mem::size_of::<U>());
+    dest
+}
+
 /// Coerce an immutable reference to be mutable.
 #[inline]
 #[deprecated="casting &T to &mut T is undefined behaviour: use Cell<T>, RefCell<T> or Unsafe<T>"]