std: Standardize (input, output) param orderings

This functions swaps the order of arguments to a few functions that previously
took (output, input) parameters, but now take (input, output) parameters (in
that order).

The affected functions are:

* ptr::copy
* ptr::copy_nonoverlapping
* slice::bytes::copy_memory
* intrinsics::copy
* intrinsics::copy_nonoverlapping

Closes #22890
[breaking-change]

1 files changed, 6 insertions, 6 deletions

diff --git a/src/libcollections/string.rs b/src/libcollections/string.rs
index 7131c1cd881..923826a1bf0 100644
--- a/src/libcollections/string.rs
+++ b/src/libcollections/string.rs
@@ -592,8 +592,8 @@ impl String {
         let ch = self.char_at(idx);
         let next = idx + ch.len_utf8();
         unsafe {
-            ptr::copy(self.vec.as_mut_ptr().offset(idx as isize),
-                      self.vec.as_ptr().offset(next as isize),
+            ptr::copy(self.vec.as_ptr().offset(next as isize),
+                      self.vec.as_mut_ptr().offset(idx as isize),
                       len - next);
             self.vec.set_len(len - (next - idx));
         }
@@ -622,11 +622,11 @@ impl String {
         let amt = ch.encode_utf8(&mut bits).unwrap();
 
         unsafe {
-            ptr::copy(self.vec.as_mut_ptr().offset((idx + amt) as isize),
-                      self.vec.as_ptr().offset(idx as isize),
+            ptr::copy(self.vec.as_ptr().offset(idx as isize),
+                      self.vec.as_mut_ptr().offset((idx + amt) as isize),
                       len - idx);
-            ptr::copy(self.vec.as_mut_ptr().offset(idx as isize),
-                      bits.as_ptr(),
+            ptr::copy(bits.as_ptr(),
+                      self.vec.as_mut_ptr().offset(idx as isize),
                       amt);
             self.vec.set_len(len + amt);
         }