Switched to Box::new in many places.

Many of the modifications putting in `Box::new` calls also include a
pointer to Issue 22405, which tracks going back to `box <expr>` if
possible in the future.

(Still tried to use `Box<_>` where it sufficed; thus some tests still
have `box_syntax` enabled, as they use a mix of `box` and `Box::new`.)

Precursor for overloaded-`box` and placement-`in`; see Issue 22181.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/liballoc/boxed.rs b/src/liballoc/boxed.rs
index 75160476d71..630ca837daa 100644
--- a/src/liballoc/boxed.rs
+++ b/src/liballoc/boxed.rs
@@ -157,7 +157,7 @@ impl<T: Default> Default for Box<T> {
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T> Default for Box<[T]> {
     #[stable(feature = "rust1", since = "1.0.0")]
-    fn default() -> Box<[T]> { box [] }
+    fn default() -> Box<[T]> { Box::<[T; 0]>::new([]) }
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]