Use Box::new() instead of box syntax in core tests

6 files changed, 13 insertions, 10 deletions

diff --git a/library/core/tests/any.rs b/library/core/tests/any.rs
index eccddcbbf59..0dffd137565 100644
--- a/library/core/tests/any.rs
+++ b/library/core/tests/any.rs
@@ -24,8 +24,11 @@ fn any_referenced() {
 
 #[test]
 fn any_owning() {
-    let (a, b, c) =
-        (box 5_usize as Box<dyn Any>, box TEST as Box<dyn Any>, box Test as Box<dyn Any>);
+    let (a, b, c) = (
+        Box::new(5_usize) as Box<dyn Any>,
+        Box::new(TEST) as Box<dyn Any>,
+        Box::new(Test) as Box<dyn Any>,
+    );
 
     assert!(a.is::<usize>());
     assert!(!b.is::<usize>());
@@ -58,7 +61,7 @@ fn any_downcast_ref() {
 #[test]
 fn any_downcast_mut() {
     let mut a = 5_usize;
-    let mut b: Box<_> = box 7_usize;
+    let mut b: Box<_> = Box::new(7_usize);
 
     let a_r = &mut a as &mut dyn Any;
     let tmp: &mut usize = &mut *b;
diff --git a/library/core/tests/clone.rs b/library/core/tests/clone.rs
index c97a87aebce..33ca9f2c6a3 100644
--- a/library/core/tests/clone.rs
+++ b/library/core/tests/clone.rs
@@ -8,8 +8,8 @@ fn test_borrowed_clone() {
 
 #[test]
 fn test_clone_from() {
-    let a = box 5;
-    let mut b = box 10;
+    let a = Box::new(5);
+    let mut b = Box::new(10);
     b.clone_from(&a);
     assert_eq!(*b, 5);
 }
diff --git a/library/core/tests/iter/traits/double_ended.rs b/library/core/tests/iter/traits/double_ended.rs
index 947d19d3dfe..00ef4a6e6a9 100644
--- a/library/core/tests/iter/traits/double_ended.rs
+++ b/library/core/tests/iter/traits/double_ended.rs
@@ -78,7 +78,8 @@ fn test_rev_rposition() {
 #[test]
 #[should_panic]
 fn test_rposition_panic() {
-    let v: [(Box<_>, Box<_>); 4] = [(box 0, box 0), (box 0, box 0), (box 0, box 0), (box 0, box 0)];
+    let u = (Box::new(0), Box::new(0));
+    let v: [(Box<_>, Box<_>); 4] = [u.clone(), u.clone(), u.clone(), u];
     let mut i = 0;
     v.iter().rposition(|_elt| {
         if i == 2 {
diff --git a/library/core/tests/lib.rs b/library/core/tests/lib.rs
index 9ea374e1045..7e9d7d27101 100644
--- a/library/core/tests/lib.rs
+++ b/library/core/tests/lib.rs
@@ -3,7 +3,6 @@
 #![feature(array_methods)]
 #![feature(array_windows)]
 #![feature(bench_black_box)]
-#![feature(box_syntax)]
 #![feature(cell_update)]
 #![feature(const_assume)]
 #![feature(const_black_box)]
diff --git a/library/core/tests/option.rs b/library/core/tests/option.rs
index da692461261..9f5e537dcef 100644
--- a/library/core/tests/option.rs
+++ b/library/core/tests/option.rs
@@ -7,7 +7,7 @@ use core::option::*;
 #[test]
 fn test_get_ptr() {
     unsafe {
-        let x: Box<_> = box 0;
+        let x: Box<_> = Box::new(0);
         let addr_x: *const isize = mem::transmute(&*x);
         let opt = Some(x);
         let y = opt.unwrap();
@@ -315,7 +315,7 @@ fn test_collect() {
 
     // test that it does not take more elements than it needs
     let mut functions: [Box<dyn Fn() -> Option<()>>; 3] =
-        [box || Some(()), box || None, box || panic!()];
+        [Box::new(|| Some(())), Box::new(|| None), Box::new(|| panic!())];
 
     let v: Option<Vec<()>> = functions.iter_mut().map(|f| (*f)()).collect();
 
diff --git a/library/core/tests/result.rs b/library/core/tests/result.rs
index 98b870512b0..103e8cc3a96 100644
--- a/library/core/tests/result.rs
+++ b/library/core/tests/result.rs
@@ -69,7 +69,7 @@ fn test_collect() {
 
     // test that it does not take more elements than it needs
     let mut functions: [Box<dyn Fn() -> Result<(), isize>>; 3] =
-        [box || Ok(()), box || Err(1), box || panic!()];
+        [Box::new(|| Ok(())), Box::new(|| Err(1)), Box::new(|| panic!())];
 
     let v: Result<Vec<()>, isize> = functions.iter_mut().map(|f| (*f)()).collect();
     assert!(v == Err(1));