| // Copyright 2012 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 call static methods on ! both directly and when it appears in a generic |
| |
| #![feature(never_type)] |
| |
| trait StringifyType { |
| fn stringify_type() -> &'static str; |
| } |
| |
| impl StringifyType for ! { |
| fn stringify_type() -> &'static str { |
| "!" |
| } |
| } |
| |
| fn maybe_stringify<T: StringifyType>(opt: Option<T>) -> &'static str { |
| match opt { |
| Some(_) => T::stringify_type(), |
| None => "none", |
| } |
| } |
| |
| fn main() { |
| println!("! is {}", <!>::stringify_type()); |
| println!("None is {}", maybe_stringify(None::<!>)); |
| } |
| |