1 trait Foo { f() -> u322 fn f() -> u32; g()3 const fn g(); //~ ERROR cannot be declared const 4 } 5 6 impl Foo for u32 { f() -> u327 const fn f() -> u32 { 22 } //~ ERROR cannot be declared const g()8 fn g() {} 9 } 10 main()11 fn main() { } 12