// Copyright 2017 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 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. #![feature(associated_consts, rustc_attrs)] #![allow(warnings)] trait MyTrait { const MY_CONST: &'static str; } macro_rules! my_macro { () => { struct MyStruct; impl MyTrait for MyStruct { const MY_CONST: &'static str = stringify!(abc); } } } my_macro!(); #[rustc_error] fn main() {} //~ ERROR compilation successful