Remove even more box syntax uses from src/test

Prior work, notably 6550021 from #88316
has removed box syntax from most of the testsuite. However,
some tests were left out.
This commit removes box_syntax uses from more locations in src/test.
Some tests that are very box syntax specific are not being migrated.

src/test/mir-opt/simplify-locals.rs

@@ -1,6 +1,6 @@
 // unit-test: SimplifyLocals
 
-#![feature(box_syntax)]
+
 #![feature(thread_local)]
 
 #[derive(Copy, Clone)]

src/test/run-make-fulldeps/save-analysis-fail/foo.rs

@@ -1,5 +1,4 @@
 #![crate_name = "test"]
-#![feature(box_syntax)]
 #![feature(rustc_private)]
 
 extern crate rustc_graphviz;
@@ -261,9 +260,9 @@ fn hello<X: SomeTrait>((z, a): (u32, String), ex: X) {
     let x = 32.0f32;
     let _ = (x + ((x * x) + 1.0).sqrt()).ln();
 
-    let s: Box<SomeTrait> = box some_fields { field1: 43 };
-    let s2: Box<some_fields> = box some_fields { field1: 43 };
-    let s3 = box nofields;
+    let s: Box<SomeTrait> = Box::new(some_fields { field1: 43 });
+    let s2: Box<some_fields> = Box::new(some_fields { field1: 43 });
+    let s3 = Box::new(nofields);
 
     s.Method(43);
     s3.Method(43);
@@ -317,7 +316,7 @@ mod macro_use_test {
 
 fn main() {
     // foo
-    let s = box some_fields { field1: 43 };
+    let s = Box::new(some_fields { field1: 43 });
     hello((43, "a".to_string()), *s);
     sub::sub2::hello();
     sub2::sub3::hello();
@@ -345,17 +344,17 @@ fn main() {
     let s4: msalias::nested_struct = sub::sub2::nested_struct { field2: 55 };
     let s4: msalias::nested_struct = sub2::nested_struct { field2: 55 };
     println(&s2.field1.to_string());
-    let s5: MyType = box some_fields { field1: 55 };
+    let s5: MyType = Box::new(some_fields { field1: 55 });
     let s = SameDir::SameStruct { name: "Bob".to_string() };
     let s = SubDir::SubStruct { name: "Bob".to_string() };
-    let s6: SomeEnum = SomeEnum::MyTypes(box s2.clone(), s5);
+    let s6: SomeEnum = SomeEnum::MyTypes(Box::new(s2.clone()), s5);
     let s7: SomeEnum = SomeEnum::Strings("one", "two", "three");
     matchSomeEnum(s6);
     matchSomeEnum(s7);
     let s8: SomeOtherEnum = SomeOtherEnum::SomeConst2;
     matchSomeOtherEnum(s8);
     let s9: SomeStructEnum =
-        SomeStructEnum::EnumStruct2 { f1: box some_fields { field1: 10 }, f2: box s2 };
+        SomeStructEnum::EnumStruct2 { f1: Box::new(some_fields { field1: 10 }), f2: Box::new(s2) };
     matchSomeStructEnum(s9);
 
     for x in &vec![1, 2, 3] {

src/test/run-make-fulldeps/save-analysis/foo.rs

@@ -1,5 +1,4 @@
 #![crate_name = "test"]
-#![feature(box_syntax)]
 #![feature(rustc_private)]
 #![feature(associated_type_defaults)]
 
@@ -255,9 +254,9 @@ fn hello<X: SomeTrait>((z, a): (u32, String), ex: X) {
     let x = 32.0f32;
     let _ = (x + ((x * x) + 1.0).sqrt()).ln();
 
-    let s: Box<SomeTrait> = box some_fields { field1: 43 };
-    let s2: Box<some_fields> = box some_fields { field1: 43 };
-    let s3 = box nofields;
+    let s: Box<SomeTrait> = Box::new(some_fields { field1: 43 });
+    let s2: Box<some_fields> = Box::new(some_fields { field1: 43 });
+    let s3 = Box::new(nofields);
 
     s.Method(43);
     s3.Method(43);
@@ -311,7 +310,7 @@ mod macro_use_test {
 
 fn main() {
     // foo
-    let s = box some_fields { field1: 43 };
+    let s = Box::new(some_fields { field1: 43 });
     hello((43, "a".to_string()), *s);
     sub::sub2::hello();
     sub2::sub3::hello();
@@ -339,17 +338,17 @@ fn main() {
     let s4: msalias::nested_struct = sub::sub2::nested_struct { field2: 55 };
     let s4: msalias::nested_struct = sub2::nested_struct { field2: 55 };
     println(&s2.field1.to_string());
-    let s5: MyType = box some_fields { field1: 55 };
+    let s5: MyType = Box::new(some_fields { field1: 55 });
     let s = SameDir::SameStruct { name: "Bob".to_string() };
     let s = SubDir::SubStruct { name: "Bob".to_string() };
-    let s6: SomeEnum = SomeEnum::MyTypes(box s2.clone(), s5);
+    let s6: SomeEnum = SomeEnum::MyTypes(Box::new(s2.clone()), s5);
     let s7: SomeEnum = SomeEnum::Strings("one", "two", "three");
     matchSomeEnum(s6);
     matchSomeEnum(s7);
     let s8: SomeOtherEnum = SomeOtherEnum::SomeConst2;
     matchSomeOtherEnum(s8);
     let s9: SomeStructEnum =
-        SomeStructEnum::EnumStruct2 { f1: box some_fields { field1: 10 }, f2: box s2 };
+        SomeStructEnum::EnumStruct2 { f1: Box::new(some_fields { field1: 10 }), f2: Box::new(s2) };
     matchSomeStructEnum(s9);
 
     for x in &vec![1, 2, 3] {

src/test/run-pass-valgrind/cleanup-auto-borrow-obj.rs

@@ -2,8 +2,6 @@
 // schedule cleanups when auto borrowing trait objects.
 // This program should be valgrind clean.
 
-#![feature(box_syntax)]
-
 static mut DROP_RAN: bool = false;
 
 struct Foo;
@@ -19,7 +17,7 @@ impl Trait for Foo {}
 
 pub fn main() {
     {
-        let _x: &Trait = &*(box Foo as Box<Trait>);
+        let _x: &Trait = &*(Box::new(Foo) as Box<Trait>);
     }
     unsafe {
         assert!(DROP_RAN);

src/test/run-pass-valgrind/coerce-match.rs

@@ -2,15 +2,18 @@
 
 // pretty-expanded FIXME #23616
 
-#![feature(box_syntax)]
-
 pub fn main() {
-    let _: Box<[isize]> =
-        if true { let b: Box<_> = box [1, 2, 3]; b } else { let b: Box<_> = box [1]; b };
+    let _: Box<[isize]> = if true {
+        let b: Box<_> = Box::new([1, 2, 3]);
+        b
+    } else {
+        let b: Box<_> = Box::new([1]);
+        b
+    };
 
     let _: Box<[isize]> = match true {
-        true => { let b: Box<_> = box [1, 2, 3]; b }
-        false => { let b: Box<_> = box [1]; b }
+        true => { let b: Box<_> = Box::new([1, 2, 3]); b }
+        false => { let b: Box<_> = Box::new([1]); b }
     };
 
     // Check we don't get over-keen at propagating coercions in the case of casts.

src/test/rustdoc-ui/rustc-check-passes.rs

@@ -1,4 +1,4 @@
-#![feature(box_syntax)]
-#![feature(box_syntax)] //~ ERROR
+#![feature(rustdoc_internals)]
+#![feature(rustdoc_internals)] //~ ERROR
 
 pub fn foo() {}

src/test/rustdoc-ui/rustc-check-passes.stderr

@@ -1,8 +1,8 @@
-error[E0636]: the feature `box_syntax` has already been declared
+error[E0636]: the feature `rustdoc_internals` has already been declared
   --> $DIR/rustc-check-passes.rs:2:12
    |
-LL | #![feature(box_syntax)]
-   |            ^^^^^^^^^^
+LL | #![feature(rustdoc_internals)]
+   |            ^^^^^^^^^^^^^^^^^
 
 error: aborting due to previous error
 

src/test/ui/closures/issue-10398.rs

@@ -1,7 +1,5 @@
-#![feature(box_syntax)]
-
 fn main() {
-    let x: Box<_> = box 1;
+    let x: Box<_> = Box::new(1);
     let f = move|| {
         let _a = x;
         drop(x);

src/test/ui/closures/issue-10398.stderr

@@ -1,5 +1,5 @@
 error[E0382]: use of moved value: `x`
-  --> $DIR/issue-10398.rs:7:14
+  --> $DIR/issue-10398.rs:5:14
    |
 LL |         let _a = x;
    |                  - value moved here

src/test/ui/closures/issue-6801.rs

@@ -2,7 +2,7 @@
 // transferring ownership of the box before invoking the stack
 // closure results in a crash.
 
-#![feature(box_syntax)]
+
 
 fn twice(x: Box<usize>) -> usize {
      *x * 2
@@ -13,7 +13,7 @@ fn invoke<F>(f: F) where F: FnOnce() -> usize {
 }
 
 fn main() {
-      let x  : Box<usize>  = box 9;
+      let x  : Box<usize>  = Box::new(9);
       let sq =  || { *x * *x };
 
       twice(x); //~ ERROR: cannot move out of

src/test/ui/dst/dst-rvalue.rs

@@ -1,12 +1,10 @@
 // Check that dynamically sized rvalues are forbidden
 
-#![feature(box_syntax)]
-
 pub fn main() {
-    let _x: Box<str> = box *"hello world";
+    let _x: Box<str> = Box::new(*"hello world");
     //~^ ERROR E0277
 
     let array: &[isize] = &[1, 2, 3];
-    let _x: Box<[isize]> = box *array;
+    let _x: Box<[isize]> = Box::new(*array);
     //~^ ERROR E0277
 }

src/test/ui/dst/dst-rvalue.stderr

@@ -1,20 +1,32 @@
 error[E0277]: the size for values of type `str` cannot be known at compilation time
-  --> $DIR/dst-rvalue.rs:6:28
+  --> $DIR/dst-rvalue.rs:4:33
    |
-LL |     let _x: Box<str> = box *"hello world";
-   |                            ^^^^^^^^^^^^^^ doesn't have a size known at compile-time
+LL |     let _x: Box<str> = Box::new(*"hello world");
+   |                        -------- ^^^^^^^^^^^^^^ doesn't have a size known at compile-time
+   |                        |
+   |                        required by a bound introduced by this call
    |
    = help: the trait `Sized` is not implemented for `str`
-   = note: the type of a box expression must have a statically known size
+note: required by a bound in `Box::<T>::new`
+  --> $SRC_DIR/alloc/src/boxed.rs:LL:COL
+   |
+LL | impl<T> Box<T> {
+   |      ^ required by this bound in `Box::<T>::new`
 
 error[E0277]: the size for values of type `[isize]` cannot be known at compilation time
-  --> $DIR/dst-rvalue.rs:10:32
+  --> $DIR/dst-rvalue.rs:8:37
    |
-LL |     let _x: Box<[isize]> = box *array;
-   |                                ^^^^^^ doesn't have a size known at compile-time
+LL |     let _x: Box<[isize]> = Box::new(*array);
+   |                            -------- ^^^^^^ doesn't have a size known at compile-time
+   |                            |
+   |                            required by a bound introduced by this call
    |
    = help: the trait `Sized` is not implemented for `[isize]`
-   = note: the type of a box expression must have a statically known size
+note: required by a bound in `Box::<T>::new`
+  --> $SRC_DIR/alloc/src/boxed.rs:LL:COL
+   |
+LL | impl<T> Box<T> {
+   |      ^ required by this bound in `Box::<T>::new`
 
 error: aborting due to 2 previous errors
 

src/test/ui/dynamically-sized-types/dst-struct.rs

@@ -1,5 +1,4 @@
 // run-pass
-#![feature(box_syntax)]
 
 struct Fat<T: ?Sized> {
     f1: isize,
@@ -111,7 +110,7 @@ pub fn main() {
     assert_eq!((*f2)[1], 2);
 
     // Nested Box.
-    let f1 : Box<Fat<[isize; 3]>> = box Fat { f1: 5, f2: "some str", ptr: [1, 2, 3] };
+    let f1 : Box<Fat<[isize; 3]>> = Box::new(Fat { f1: 5, f2: "some str", ptr: [1, 2, 3] });
     foo(&*f1);
     let f2 : Box<Fat<[isize]>> = f1;
     foo(&*f2);

src/test/ui/dynamically-sized-types/dst-trait.rs

@@ -1,5 +1,4 @@
 // run-pass
-#![feature(box_syntax)]
 
 struct Fat<T: ?Sized> {
     f1: isize,

src/test/ui/issues/auxiliary/issue-2380.rs

@@ -1,8 +1,6 @@
 #![crate_name="a"]
 #![crate_type = "lib"]
 
-#![feature(box_syntax)]
-
 pub trait i<T>
 {
     fn dummy(&self, t: T) -> T { panic!() }
@@ -11,5 +9,5 @@ pub trait i<T>
 pub fn f<T>() -> Box<i<T>+'static> {
     impl<T> i<T> for () { }
 
-    box () as Box<i<T>+'static>
+    Box::new(()) as Box<i<T>+'static>
 }

src/test/ui/issues/issue-10682.rs

@@ -4,12 +4,10 @@
 
 // pretty-expanded FIXME #23616
 
-#![feature(box_syntax)]
-
 fn work(_: Box<isize>) {}
 fn foo<F:FnOnce()>(_: F) {}
 
 pub fn main() {
-  let a = box 1;
+  let a = Box::new(1);
   foo(move|| { foo(move|| { work(a) }) })
 }

src/test/ui/issues/issue-10767.rs

@@ -1,10 +1,8 @@
 // run-pass
 // pretty-expanded FIXME #23616
 
-#![feature(box_syntax)]
-
 pub fn main() {
     fn f() {
     }
-    let _: Box<fn()> = box (f as fn());
+    let _: Box<fn()> = Box::new(f as fn());
 }

src/test/ui/issues/issue-10802.rs

@@ -1,6 +1,5 @@
 // run-pass
 #![allow(dead_code)]
-#![feature(box_syntax)]
 
 struct DroppableStruct;
 enum DroppableEnum {
@@ -33,14 +32,14 @@ impl  Whatever {
 
 fn main() {
     {
-        let f: Box<_> = box DroppableStruct;
-        let _a = Whatever::new(box f as Box<dyn MyTrait>);
+        let f: Box<_> = Box::new(DroppableStruct);
+        let _a = Whatever::new(Box::new(f) as Box<dyn MyTrait>);
     }
     assert!(unsafe { DROPPED });
     unsafe { DROPPED = false; }
     {
-        let f: Box<_> = box DroppableEnum::DroppableVariant1;
-        let _a = Whatever::new(box f as Box<dyn MyTrait>);
+        let f: Box<_> = Box::new(DroppableEnum::DroppableVariant1);
+        let _a = Whatever::new(Box::new(f) as Box<dyn MyTrait>);
     }
     assert!(unsafe { DROPPED });
 }

src/test/ui/issues/issue-11192.rs

@@ -1,20 +1,20 @@
-#![feature(box_syntax)]
-
 struct Foo {
     x: isize
 }
 
+
 impl Drop for Foo {
     fn drop(&mut self) {
         println!("drop {}", self.x);
     }
 }
 
+
 fn main() {
-    let mut ptr: Box<_> = box Foo { x: 0 };
+    let mut ptr: Box<_> = Box::new(Foo { x: 0 });
     let mut test = |foo: &Foo| {
         println!("access {}", foo.x);
-        ptr = box Foo { x: ptr.x + 1 };
+        ptr = Box::new(Foo { x: ptr.x + 1 });
         println!("access {}", foo.x);
     };
     test(&*ptr);

src/test/ui/issues/issue-11192.stderr

@@ -4,7 +4,7 @@ error[E0502]: cannot borrow `*ptr` as immutable because it is also borrowed as m
 LL |     let mut test = |foo: &Foo| {
    |                    ----------- mutable borrow occurs here
 LL |         println!("access {}", foo.x);
-LL |         ptr = box Foo { x: ptr.x + 1 };
+LL |         ptr = Box::new(Foo { x: ptr.x + 1 });
    |         --- first borrow occurs due to use of `ptr` in closure
 ...
 LL |     test(&*ptr);

src/test/ui/issues/issue-11515.rs

@@ -1,10 +1,10 @@
-#![feature(box_syntax)]
-
 struct Test {
     func: Box<dyn FnMut() + 'static>,
 }
 
+
+
 fn main() {
     let closure: Box<dyn Fn() + 'static> = Box::new(|| ());
-    let test = box Test { func: closure }; //~ ERROR trait upcasting coercion is experimental [E0658]
+    let test = Box::new(Test { func: closure }); //~ ERROR trait upcasting coercion is experimental [E0658]
 }