| // Copyright 2015 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // Test that we can't declare a const fn in an impl -- right now it's |
| // just not allowed at all, though eventually it'd make sense to allow |
| // it if the trait fn is const (but right now no trait fns can be |
| // const). |
| |
| #![feature(const_fn)] |
| |
| trait Foo { |
| fn f() -> u32; |
| } |
| |
| impl Foo for u32 { |
| const fn f() -> u32 { 22 } |
| //~^ ERROR trait fns cannot be declared const |
| } |
| |
| fn main() { } |
