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js-sys: Add extends to JSON

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Part of #670
This commit is contained in:
Nick Fitzgerald
2018-09-06 13:32:31 -07:00
parent cda71757d3
commit 5df2347a7a
2 changed files with 18 additions and 2 deletions
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6
crates/js-sys/src/lib.rs
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@ -3048,8 +3048,12 @@ pub mod WebAssembly {
// JSON // JSON
#[wasm_bindgen] #[wasm_bindgen]
extern "C" { extern "C" {
/// The `JSON` object contains methods for parsing [JavaScript Object
/// Notation (JSON)](https://json.org/) and converting values to JSON. It
/// can't be called or constructed, and aside from its two method
/// properties, it has no interesting functionality of its own.
#[derive(Clone, Debug)] #[derive(Clone, Debug)]
#[wasm_bindgen(extends = Object)]
pub type JSON; pub type JSON;
/// The `JSON.parse()` method parses a JSON string, constructing the /// The `JSON.parse()` method parses a JSON string, constructing the

14
crates/js-sys/tests/wasm/JSON.rs
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@ -1,4 +1,4 @@
use wasm_bindgen::JsValue; use wasm_bindgen::prelude::*;
use wasm_bindgen_test::*; use wasm_bindgen_test::*;
use wasm_bindgen::JsCast; use wasm_bindgen::JsCast;
use js_sys::*; use js_sys::*;
@ -82,3 +82,15 @@ fn stringify_error() {
let err_msg: String = From::from(err.message()); let err_msg: String = From::from(err.message());
assert!(err_msg.contains("rust really rocks")); assert!(err_msg.contains("rust really rocks"));
} }
#[wasm_bindgen_test]
fn json_extends() {
#[wasm_bindgen]
extern {
#[wasm_bindgen(js_name = JSON)]
static json: JSON;
}
assert!(json.is_instance_of::<Object>());
let _: &Object = json.as_ref();
}