| // A version of coerce-expect-unsized that uses type ascription. |
| // Doesn't work so far, but supposed to work eventually |
| |
| #![feature(box_syntax, type_ascription)] |
| |
| use std::fmt::Debug; |
| |
| pub fn main() { |
| let _ = box { [1, 2, 3] }: Box<[i32]>; //~ ERROR mismatched types |
| let _ = box if true { [1, 2, 3] } else { [1, 3, 4] }: Box<[i32]>; //~ ERROR mismatched types |
| let _ = box match true { true => [1, 2, 3], false => [1, 3, 4] }: Box<[i32]>; |
| //~^ ERROR mismatched types |
| let _ = box { |x| (x as u8) }: Box<dyn Fn(i32) -> _>; //~ ERROR mismatched types |
| let _ = box if true { false } else { true }: Box<dyn Debug>; //~ ERROR mismatched types |
| let _ = box match true { true => 'a', false => 'b' }: Box<dyn Debug>; //~ ERROR mismatched types |
| |
| let _ = &{ [1, 2, 3] }: &[i32]; //~ ERROR mismatched types |
| let _ = &if true { [1, 2, 3] } else { [1, 3, 4] }: &[i32]; //~ ERROR mismatched types |
| let _ = &match true { true => [1, 2, 3], false => [1, 3, 4] }: &[i32]; |
| //~^ ERROR mismatched types |
| let _ = &{ |x| (x as u8) }: &dyn Fn(i32) -> _; //~ ERROR mismatched types |
| let _ = &if true { false } else { true }: &dyn Debug; //~ ERROR mismatched types |
| let _ = &match true { true => 'a', false => 'b' }: &dyn Debug; //~ ERROR mismatched types |
| |
| let _ = Box::new([1, 2, 3]): Box<[i32]>; //~ ERROR mismatched types |
| let _ = Box::new(|x| (x as u8)): Box<dyn Fn(i32) -> _>; //~ ERROR mismatched types |
| |
| let _ = vec![ |
| Box::new(|x| (x as u8)), |
| box |x| (x as i16 as u8), |
| ]: Vec<Box<dyn Fn(i32) -> _>>; |
| } |