mirror of https://github.com/rust-lang/rust
44 lines
1.6 KiB
Rust
44 lines
1.6 KiB
Rust
//@ run-pass
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#![allow(unused_braces)]
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use std::cell::RefCell;
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use std::fmt::Debug;
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use std::rc::Rc;
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// Check that coercions apply at the pointer level and don't cause
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// rvalue expressions to be unsized. See #20169 for more information.
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pub fn main() {
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let _: Box<[isize]> = Box::new({ [1, 2, 3] });
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let _: Box<[isize]> = Box::new(if true { [1, 2, 3] } else { [1, 3, 4] });
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let _: Box<[isize]> = Box::new(match true { true => [1, 2, 3], false => [1, 3, 4] });
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let _: Box<dyn Fn(isize) -> _> = Box::new({ |x| (x as u8) });
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let _: Box<dyn Debug> = Box::new(if true { false } else { true });
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let _: Box<dyn Debug> = Box::new(match true { true => 'a', false => 'b' });
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let _: &[isize] = &{ [1, 2, 3] };
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let _: &[isize] = &if true { [1, 2, 3] } else { [1, 3, 4] };
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let _: &[isize] = &match true { true => [1, 2, 3], false => [1, 3, 4] };
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let _: &dyn Fn(isize) -> _ = &{ |x| (x as u8) };
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let _: &dyn Debug = &if true { false } else { true };
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let _: &dyn Debug = &match true { true => 'a', false => 'b' };
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let _: &str = &{ String::new() };
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let _: &str = &if true { String::from("...") } else { 5.to_string() };
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let _: &str = &match true {
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true => format!("{}", false),
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false => ["x", "y"].join("+")
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};
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let _: Box<[isize]> = Box::new([1, 2, 3]);
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let _: Box<dyn Fn(isize) -> _> = Box::new(|x| (x as u8));
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let _: Rc<RefCell<[isize]>> = Rc::new(RefCell::new([1, 2, 3]));
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let _: Rc<RefCell<dyn FnMut(isize) -> _>> = Rc::new(RefCell::new(|x| (x as u8)));
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let _: Vec<Box<dyn Fn(isize) -> _>> = vec![
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Box::new(|x| (x as u8)),
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Box::new(|x| (x as i16 as u8)),
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];
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}
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