diff options
Diffstat (limited to 'tests/ui/pattern/usefulness/issue-3601.rs')
-rw-r--r-- | tests/ui/pattern/usefulness/issue-3601.rs | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/tests/ui/pattern/usefulness/issue-3601.rs b/tests/ui/pattern/usefulness/issue-3601.rs new file mode 100644 index 000000000..6215a2398 --- /dev/null +++ b/tests/ui/pattern/usefulness/issue-3601.rs @@ -0,0 +1,34 @@ +#![feature(box_patterns)] + +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::new(ElementKind::HTMLImageElement(id)) }; + let n = NodeData { kind: Box::new(NodeKind::Element(ed)) }; + + // n.b. span could be better + match n.kind { + box NodeKind::Element(ed) => match ed.kind { //~ ERROR non-exhaustive patterns + box ElementKind::HTMLImageElement(ref d) if d.image.is_some() => { true } + }, + }; +} |