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1 | // Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT |
2 | // file at the top-level directory of this distribution and at | |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
5 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | |
6 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | |
7 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | |
8 | // option. This file may not be copied, modified, or distributed | |
9 | // except according to those terms. | |
10 | ||
85aaf69f | 11 | #![feature(box_patterns)] |
1a4d82fc JJ |
12 | #![feature(box_syntax)] |
13 | ||
223e47cc | 14 | struct HTMLImageData { |
1a4d82fc | 15 | image: Option<String> |
223e47cc LB |
16 | } |
17 | ||
18 | struct ElementData { | |
1a4d82fc | 19 | kind: Box<ElementKind> |
223e47cc LB |
20 | } |
21 | ||
22 | enum ElementKind { | |
23 | HTMLImageElement(HTMLImageData) | |
24 | } | |
25 | ||
26 | enum NodeKind { | |
27 | Element(ElementData) | |
28 | } | |
29 | ||
30 | struct NodeData { | |
1a4d82fc | 31 | kind: Box<NodeKind>, |
223e47cc LB |
32 | } |
33 | ||
34 | fn main() { | |
35 | let mut id = HTMLImageData { image: None }; | |
1a4d82fc JJ |
36 | let ed = ElementData { kind: box ElementKind::HTMLImageElement(id) }; |
37 | let n = NodeData {kind : box NodeKind::Element(ed)}; | |
223e47cc LB |
38 | // n.b. span could be better |
39 | match n.kind { | |
1a4d82fc JJ |
40 | box NodeKind::Element(ed) => match ed.kind { //~ ERROR non-exhaustive patterns |
41 | box ElementKind::HTMLImageElement(ref d) if d.image.is_some() => { true } | |
223e47cc | 42 | }, |
223e47cc LB |
43 | }; |
44 | } |