rust/src/test/compile-fail/issue-3601.rs
2014-05-24 21:48:10 -07:00

44 lines
1.1 KiB
Rust

// Copyright 2012-2013 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.
struct HTMLImageData {
image: Option<String>
}
struct ElementData {
kind: Box<ElementKind>
}
enum ElementKind {
HTMLImageElement(HTMLImageData)
}
enum NodeKind {
Element(ElementData)
}
struct NodeData {
kind: Box<NodeKind>,
}
fn main() {
let mut id = HTMLImageData { image: None };
let ed = ElementData { kind: box HTMLImageElement(id) };
let n = NodeData {kind : box Element(ed)};
// n.b. span could be better
match n.kind {
box Element(ed) => match ed.kind { //~ ERROR non-exhaustive patterns
box HTMLImageElement(ref d) if d.image.is_some() => { true }
},
_ => fail!("WAT") //~ ERROR unreachable pattern
};
}