mirror of
https://github.com/tc39/test262.git
synced 2025-10-25 17:53:53 +02:00
78 lines
2.2 KiB
JavaScript
78 lines
2.2 KiB
JavaScript
// This file was procedurally generated from the following sources:
|
|
// - src/dstr-binding/ary-ptrn-elision.case
|
|
// - src/dstr-binding/default/arrow-function.template
|
|
/*---
|
|
description: Elision advances iterator (arrow function expression)
|
|
esid: sec-arrow-function-definitions-runtime-semantics-evaluation
|
|
es6id: 14.2.16
|
|
features: [generators, destructuring-binding]
|
|
flags: [generated]
|
|
info: |
|
|
ArrowFunction : ArrowParameters => ConciseBody
|
|
|
|
[...]
|
|
4. Let closure be FunctionCreate(Arrow, parameters, ConciseBody, scope, strict).
|
|
[...]
|
|
|
|
9.2.1 [[Call]] ( thisArgument, argumentsList)
|
|
|
|
[...]
|
|
7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
|
|
[...]
|
|
|
|
9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
|
|
|
|
1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
|
|
[...]
|
|
|
|
9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
|
|
|
|
[...]
|
|
23. Let iteratorRecord be Record {[[iterator]]:
|
|
CreateListIterator(argumentsList), [[done]]: false}.
|
|
24. If hasDuplicates is true, then
|
|
[...]
|
|
25. Else,
|
|
b. Let formalStatus be IteratorBindingInitialization for formals with
|
|
iteratorRecord and env as arguments.
|
|
[...]
|
|
|
|
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
|
|
|
|
ArrayBindingPattern : [ Elision ]
|
|
|
|
1. Return the result of performing
|
|
IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord
|
|
as the argument.
|
|
|
|
12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation
|
|
|
|
Elision : ,
|
|
|
|
1. If iteratorRecord.[[done]] is false, then
|
|
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
|
|
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
|
|
c. ReturnIfAbrupt(next).
|
|
d. If next is false, set iteratorRecord.[[done]] to true.
|
|
2. Return NormalCompletion(empty).
|
|
|
|
---*/
|
|
var first = 0;
|
|
var second = 0;
|
|
function* g() {
|
|
first += 1;
|
|
yield;
|
|
second += 1;
|
|
};
|
|
|
|
var callCount = 0;
|
|
var f;
|
|
f = ([,]) => {
|
|
assert.sameValue(first, 1);
|
|
assert.sameValue(second, 0);
|
|
callCount = callCount + 1;
|
|
};
|
|
|
|
f(g());
|
|
assert.sameValue(callCount, 1, 'arrow function invoked exactly once');
|