wasm-bindgen/tests/wasm/rethrow.js
Alex Crichton 7cf4213283 Allow returning Result from functions
This commit adds support for exporting a function defined in Rust that returns a
`Result`, translating the `Ok` variant to the actual return value and the `Err`
variant to an exception that's thrown in JS.

The support for return types and descriptors was rejiggered a bit to be a bit
more abstract and more well suited for this purpose. We no longer distinguish
between functions with a return value and those without a return value.
Additionally a new trait, `ReturnWasmAbi`, is used for converting return values.
This trait is an internal implementation detail, however, and shouldn't surface
itself to users much (if at all).

Closes #841
2018-09-18 13:13:59 -07:00

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JavaScript

const wasm = require('wasm-bindgen-test.js');
const assert = require('assert');
exports.call_throw_one = function() {
try {
wasm.throw_one();
} catch (e) {
assert.strictEqual(e, 1);
}
};
exports.call_ok = function() {
wasm.nothrow();
};