rust/tests/ui/rfcs/rfc-2632-const-trait-impl/effects/trait-fn-const.rs

22 lines
555 B
Rust

// Regression test for issue #113378.
#![feature(const_trait_impl, effects)] //~ WARN the feature `effects` is incomplete
#[const_trait]
trait Trait {
const fn fun(); //~ ERROR functions in traits cannot be declared const
}
impl const Trait for () {
const fn fun() {} //~ ERROR functions in trait impls cannot be declared const
}
impl Trait for u32 {
const fn fun() {} //~ ERROR functions in trait impls cannot be declared const
}
trait NonConst {
const fn fun(); //~ ERROR functions in traits cannot be declared const
}
fn main() {}