23 lines
481 B
Rust
23 lines
481 B
Rust
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#![feature(return_position_impl_trait_in_trait)]
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#![allow(incomplete_features)]
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use std::fmt::Debug;
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trait Foo {
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fn baz(&self) -> impl Debug;
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}
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impl Foo for u32 {
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fn baz(&self) -> u32 {
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32
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}
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}
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fn main() {
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let i = Box::new(42_u32) as Box<dyn Foo>;
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//~^ ERROR the trait `Foo` cannot be made into an object
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//~| ERROR the trait `Foo` cannot be made into an object
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let s = i.baz();
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//~^ ERROR the trait `Foo` cannot be made into an object
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}
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