1 //! Test for `boxed` mod.
4 use core::convert::TryInto;
6 use core::result::Result::{Err, Ok};
7 use core::clone::Clone;
14 fn test_owned_clone() {
16 let b: Box<i32> = a.clone();
20 #[derive(PartialEq, Eq)]
25 let a = Box::new(8) as Box<dyn Any>;
26 let b = Box::new(Test) as Box<dyn Any>;
28 match a.downcast::<i32>() {
30 assert!(a == Box::new(8));
34 match b.downcast::<Test>() {
36 assert!(a == Box::new(Test));
41 let a = Box::new(8) as Box<dyn Any>;
42 let b = Box::new(Test) as Box<dyn Any>;
44 assert!(a.downcast::<Box<Test>>().is_err());
45 assert!(b.downcast::<Box<i32>>().is_err());
50 let a = Box::new(8) as Box<dyn Any>;
51 let b = Box::new(Test) as Box<dyn Any>;
52 let a_str = format!("{:?}", a);
53 let b_str = format!("{:?}", b);
54 assert_eq!(a_str, "Any");
55 assert_eq!(b_str, "Any");
57 static EIGHT: usize = 8;
58 static TEST: Test = Test;
59 let a = &EIGHT as &dyn Any;
60 let b = &TEST as &dyn Any;
61 let s = format!("{:?}", a);
63 let s = format!("{:?}", b);
69 fn homura<T: Deref<Target = i32>>(_: T) {}
70 homura(Box::new(765));
76 let p = Box::into_raw(x);
80 let y = Box::from_raw(p);
89 fn set(&mut self, value: u32);
95 fn get(&self) -> u32 {
99 fn set(&mut self, value: u32) {
104 let x: Box<dyn Foo> = Box::new(Bar(17));
105 let p = Box::into_raw(x);
107 assert_eq!(17, (*p).get());
109 let y: Box<dyn Foo> = Box::from_raw(p);
110 assert_eq!(19, y.get());
116 let slice: &[f64] = &[-1.0, 0.0, 1.0, f64::INFINITY];
117 let boxed: Box<[f64]> = Box::from(slice);
118 assert_eq!(&*boxed, slice)
123 let slice: &[i64] = &[i64::MIN, -2, -1, 0, 1, 2, i64::MAX];
124 let boxed: Box<[i64]> = Box::from(slice);
125 assert_eq!(&*boxed, slice)
130 let s = "Hello, world!";
131 let boxed: Box<str> = Box::from(s);
132 assert_eq!(&*boxed, s)
136 fn boxed_slice_from_iter() {
138 let boxed: Box<[u32]> = iter.collect();
139 assert_eq!(boxed.len(), 100);
140 assert_eq!(boxed[7], 7);
144 fn test_array_from_slice() {
145 let v = vec![1, 2, 3];
146 let r: Box<[u32]> = v.into_boxed_slice();
148 let a: Result<Box<[u32; 3]>, _> = r.clone().try_into();
151 let a: Result<Box<[u32; 2]>, _> = r.clone().try_into();