| #![feature(const_fmt_arguments_new)] | |
| #![feature(const_trait_impl, effects)] | |
| #[const_trait] | |
| trait Tr { | |
| fn req(&self); | |
| fn prov(&self) { | |
| println!("lul"); //~ ERROR: cannot call non-const fn `_print` in constant functions | |
| self.req(); | |
| } | |
| } | |
| struct S; | |
| impl const Tr for S { | |
| fn req(&self) {} | |
| } | |
| fn main() {} |