Source code
Revision control
Copy as Markdown
Other Tools
// |reftest| async
// This file was procedurally generated from the following sources:
// - src/dstr-assignment-for-await/obj-prop-elem-init-fn-name-class.case
// - src/dstr-assignment-for-await/default/async-gen-decl.template
/*---
description: Assignment of function `name` attribute (ClassExpression) (for-await-of statement in an async generator declaration)
esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
features: [class, destructuring-binding, async-iteration]
flags: [generated, async]
includes: [propertyHelper.js]
info: |
IterationStatement :
for await ( LeftHandSideExpression of AssignmentExpression ) Statement
1. Let keyResult be the result of performing ? ForIn/OfHeadEvaluation(« »,
AssignmentExpression, iterate).
2. Return ? ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement,
keyResult, assignment, labelSet).
13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
[...]
5. If destructuring is true and if lhsKind is assignment, then
a. Assert: lhs is a LeftHandSideExpression.
b. Let assignmentPattern be the parse of the source text corresponding to
lhs using AssignmentPattern as the goal symbol.
[...]
AssignmentElement[Yield] : DestructuringAssignmentTarget Initializeropt
[...] 6. If Initializer is present and v is undefined and
IsAnonymousFunctionDefinition(Initializer) and IsIdentifierRef of
DestructuringAssignmentTarget are both true, then
a. Let hasNameProperty be ? HasOwnProperty(rhsValue, "name").
b. If hasNameProperty is false, perform SetFunctionName(rhsValue, GetReferencedName(lref)).
---*/
let xCls, cls, xCls2;
let iterCount = 0;
async function * fn() {
for await ({ x: xCls = class x {}, x: cls = class {}, x: xCls2 = class { static name() {} } } of [{}]) {
assert.notSameValue(xCls.name, 'xCls');
assert.notSameValue(xCls2.name, 'xCls2');
verifyProperty(cls, 'name', {
enumerable: false,
writable: false,
configurable: true,
value: 'cls'
});
iterCount += 1;
}
}
let promise = fn().next();
promise
.then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE)
.then($DONE, $DONE);