rust/tests/ui/rfcs/rfc-2632-const-trait-impl/tilde-const-inherent-assoc-const-fn.rs

//@ check-pass
#![feature(const_trait_impl, effects)] //~ WARN the feature `effects` is incomplete

#[const_trait]
trait Foo {
    fn foo(&self) {}
}

struct Bar<T>(T);

impl<T> Bar<T> {
    const fn foo(&self) where T: ~const Foo {
        self.0.foo()
    }
}

fn main() {}