#![feature(const_trait_impl)] #![feature(associated_type_bounds)] #[const_trait] trait T {} struct S; impl T for S {} fn rpit() -> impl ~const T { S } //~^ ERROR `~const` is not allowed fn apit(_: impl ~const T) {} //~^ ERROR `~const` is not allowed fn rpit_assoc_bound() -> impl IntoIterator { Some(S) } //~^ ERROR `~const` is not allowed fn apit_assoc_bound(_: impl IntoIterator) {} //~^ ERROR `~const` is not allowed struct TildeQuestion(std::marker::PhantomData); //~^ ERROR `~const` and `?` are mutually exclusive fn main() {}