2 #![allow(unused_braces)]
4 use std::cell::RefCell;
8 // Check that coercions apply at the pointer level and don't cause
9 // rvalue expressions to be unsized. See #20169 for more information.
12 let _: Box<[isize]> = Box::new({ [1, 2, 3] });
13 let _: Box<[isize]> = Box::new(if true { [1, 2, 3] } else { [1, 3, 4] });
14 let _: Box<[isize]> = Box::new(match true { true => [1, 2, 3], false => [1, 3, 4] });
15 let _: Box<dyn Fn(isize) -> _> = Box::new({ |x| (x as u8) });
16 let _: Box<dyn Debug> = Box::new(if true { false } else { true });
17 let _: Box<dyn Debug> = Box::new(match true { true => 'a', false => 'b' });
19 let _: &[isize] = &{ [1, 2, 3] };
20 let _: &[isize] = &if true { [1, 2, 3] } else { [1, 3, 4] };
21 let _: &[isize] = &match true { true => [1, 2, 3], false => [1, 3, 4] };
22 let _: &dyn Fn(isize) -> _ = &{ |x| (x as u8) };
23 let _: &dyn Debug = &if true { false } else { true };
24 let _: &dyn Debug = &match true { true => 'a', false => 'b' };
26 let _: &str = &{ String::new() };
27 let _: &str = &if true { String::from("...") } else { 5.to_string() };
28 let _: &str = &match true {
29 true => format!("{}", false),
30 false => ["x", "y"].join("+")
33 let _: Box<[isize]> = Box::new([1, 2, 3]);
34 let _: Box<dyn Fn(isize) -> _> = Box::new(|x| (x as u8));
36 let _: Rc<RefCell<[isize]>> = Rc::new(RefCell::new([1, 2, 3]));
37 let _: Rc<RefCell<dyn FnMut(isize) -> _>> = Rc::new(RefCell::new(|x| (x as u8)));
39 let _: Vec<Box<dyn Fn(isize) -> _>> = vec![
40 Box::new(|x| (x as u8)),
41 Box::new(|x| (x as i16 as u8)),