mirror of
https://github.com/tc39/test262.git
synced 2025-10-31 11:44:31 +01:00
42 lines
1.3 KiB
JavaScript
42 lines
1.3 KiB
JavaScript
// This file was procedurally generated from the following sources:
|
|
// - src/dstr-binding/ary-ptrn-rest-id.case
|
|
// - src/dstr-binding/default/async-gen-func-decl-dflt.template
|
|
/*---
|
|
description: Lone rest element (async generator function declaration (default parameter))
|
|
esid: sec-asyncgenerator-definitions-instantiatefunctionobject
|
|
features: [async-iteration]
|
|
flags: [generated, async]
|
|
info: |
|
|
AsyncGeneratorDeclaration : async [no LineTerminator here] function * BindingIdentifier
|
|
( FormalParameters ) { AsyncGeneratorBody }
|
|
|
|
[...]
|
|
3. Let F be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, AsyncGeneratorBody,
|
|
scope, strict).
|
|
[...]
|
|
|
|
|
|
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
|
|
BindingRestElement : ... BindingIdentifier
|
|
[...] 3. Let A be ArrayCreate(0). [...] 5. Repeat
|
|
[...]
|
|
f. Let status be CreateDataProperty(A, ToString (n), nextValue).
|
|
[...]
|
|
---*/
|
|
var values = [1, 2, 3];
|
|
|
|
|
|
var callCount = 0;
|
|
async function* f([...x] = values) {
|
|
assert(Array.isArray(x));
|
|
assert.sameValue(x.length, 3);
|
|
assert.sameValue(x[0], 1);
|
|
assert.sameValue(x[1], 2);
|
|
assert.sameValue(x[2], 3);
|
|
assert.notSameValue(x, values);
|
|
callCount = callCount + 1;
|
|
};
|
|
f().next().then(() => {
|
|
assert.sameValue(callCount, 1, 'invoked exactly once');
|
|
}).then($DONE, $DONE);
|