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// |reftest| async
// This file was procedurally generated from the following sources:
// - src/dstr-assignment-for-await/array-elem-init-fn-name-gen.case
// - src/dstr-assignment-for-await/default/async-gen-decl.template
/*---
description: Assignment of function `name` attribute (GeneratorExpression) (for-await-of statement in an async generator declaration)
esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
features: [generators, 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
[...] 7. If Initializer is present and value is undefined and
IsAnonymousFunctionDefinition(Initializer) and IsIdentifierRef of
DestructuringAssignmentTarget are both true, then
a. Let hasNameProperty be ? HasOwnProperty(v, "name").
b. If hasNameProperty is false, perform SetFunctionName(v, GetReferencedName(lref)).
---*/
let xGen, gen;
let iterCount = 0;
async function * fn() {
for await ([ xGen = function* x() {}, gen = function*() {} ] of [[]]) {
assert.notSameValue(xGen.name, 'xGen');
verifyProperty(gen, 'name', {
enumerable: false,
writable: false,
configurable: true,
value: 'gen'
});
iterCount += 1;
}
}
let promise = fn().next();
promise
.then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE)
.then($DONE, $DONE);
|
