mirror of
https://github.com/fluencelabs/wasm-bindgen
synced 2025-04-04 03:11:08 +00:00
88618116ac
This commit adds support to attach `#[wasm_bindgen]` on an `async fn` which will change the return value into a `Promise` in JS. This in theory has the exact same semantics as an `async` function in JS where you call it with all the arguments, nothing happens and you get a promise back, and then later the promise actually resolves. This commit also adds a helper trait, `IntoJsResult`, to allow `async` functions with multiple kinds of return values instead of requiring everything to be `Result<JsValue, JsValue>`.
40 lines
1.0 KiB
Rust
40 lines
1.0 KiB
Rust
use wasm_bindgen::prelude::*;
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#[wasm_bindgen]
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pub struct MyType;
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#[wasm_bindgen]
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pub async fn good1() { loop {} }
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#[wasm_bindgen]
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pub async fn good2() -> JsValue { loop {} }
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#[wasm_bindgen]
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pub async fn good3() -> u32 { loop {} }
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#[wasm_bindgen]
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pub async fn good4() -> MyType { loop {} }
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#[wasm_bindgen]
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pub async fn good5() -> Result<(), JsValue> { loop {} }
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#[wasm_bindgen]
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pub async fn good6() -> Result<JsValue, JsValue> { loop {} }
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#[wasm_bindgen]
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pub async fn good7() -> Result<u32, JsValue> { loop {} }
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#[wasm_bindgen]
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pub async fn good8() -> Result<MyType, JsValue> { loop {} }
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#[wasm_bindgen]
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pub async fn good9() -> Result<MyType, u32> { loop {} }
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#[wasm_bindgen]
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pub async fn good10() -> Result<MyType, MyType> { loop {} }
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pub struct BadType;
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#[wasm_bindgen]
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pub async fn bad1() -> Result<(), ()> { loop {} }
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#[wasm_bindgen]
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pub async fn bad2() -> Result<(), BadType> { loop {} }
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#[wasm_bindgen]
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pub async fn bad3() -> BadType { loop {} }
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#[wasm_bindgen]
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pub async fn bad4() -> Result<BadType, JsValue> { loop {} }
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fn main() {}
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