Merge pull request #723 from mstallmo/add-extends-to-js-sys

Add extends attributes for js_sys:Generator

Author: alexcrichton

crates/js-sys/src/lib.rs

@@ -885,6 +885,7 @@ impl Function {
 // Generator
 #[wasm_bindgen]
 extern {
+    #[wasm_bindgen(extends = Object)]
     #[derive(Clone, Debug)]
     pub type Generator;
 

crates/js-sys/tests/wasm/Generator.rs

@@ -1,5 +1,6 @@
 use wasm_bindgen::prelude::*;
 use wasm_bindgen_test::*;
+use wasm_bindgen::JsCast;
 use js_sys::*;
 
 #[wasm_bindgen(module = "tests/wasm/Generator.js")]
@@ -56,3 +57,10 @@ fn throw() {
     assert!(next.value().is_undefined());
     assert!(next.done());
 }
+
+#[wasm_bindgen_test]
+fn generator_inheritance() {
+    let gen = dummy_generator();
+    
+    assert!(gen.is_instance_of::<Object>());
+}