diff options
Diffstat (limited to 'src/test/ui/traits/object-one-type-two-traits.rs')
-rw-r--r-- | src/test/ui/traits/object-one-type-two-traits.rs | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/test/ui/traits/object-one-type-two-traits.rs b/src/test/ui/traits/object-one-type-two-traits.rs new file mode 100644 index 000000000..86a2094ee --- /dev/null +++ b/src/test/ui/traits/object-one-type-two-traits.rs @@ -0,0 +1,31 @@ +// run-pass +#![allow(dead_code)] +#![allow(unused_variables)] +// Testing creating two vtables with the same self type, but different +// traits. + +use std::any::Any; + +trait Wrap { + fn get(&self) -> isize; + fn wrap(self: Box<Self>) -> Box<dyn Any+'static>; +} + +impl Wrap for isize { + fn get(&self) -> isize { + *self + } + fn wrap(self: Box<isize>) -> Box<dyn Any+'static> { + self as Box<dyn Any+'static> + } +} + +fn is<T:Any>(x: &dyn Any) -> bool { + x.is::<T>() +} + +fn main() { + let x = Box::new(22isize) as Box<dyn Wrap>; + println!("x={}", x.get()); + let y = x.wrap(); +} |