wasm: provide def_zcoord

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/wasm/wasm.rs b/wasm/wasm.rs
index f1f9f6e8230c5233d744ddab14834f30f28ad152..0872d41b5d1731fc3be3675dbdcb6ba636e5db89 100644 (file)
--- a/wasm/wasm.rs
+++ b/wasm/wasm.rs
@@ -48,6 +48,12 @@ pub fn increment(packed: &JsValue) -> JsValue {
   m.increment().e()?.to_string().into()
 }
 
+#[wasm_bindgen]
+pub fn def_zcoord() -> JsValue {
+  let z : ZCoord = Default::default();
+  z.to_string().into()
+}
+
 #[wasm_bindgen]
 pub struct ZCoordIterator (zcoord::BoxedIterator);