// Copyright 2016 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(reflect_marker)] use std::marker::Reflect; use std::any::Any; struct Foo; trait Bar {} impl Bar for Foo {} fn main() { let any: &Any = &Bar; //~ ERROR E0425 //~| HELP trait `Bar` if any.is::() { println!("u32"); } }