mirror of https://github.com/tc39/test262.git
47 lines
1.6 KiB
JavaScript
47 lines
1.6 KiB
JavaScript
|
// This file was procedurally generated from the following sources:
|
||
|
|
// - src/dstr-binding/ary-ptrn-rest-id-iter-step-err.case
|
||
|
|
// - src/dstr-binding/error/const-stmt.template
|
||
|
|
/*---
|
||
|
|
description: Error forwarding when IteratorStep returns an abrupt completion (`const` statement)
|
||
|
|
esid: sec-let-and-const-declarations-runtime-semantics-evaluation
|
||
|
|
es6id: 13.3.1.4
|
||
|
|
features: [generators, destructuring-binding]
|
||
|
|
flags: [generated]
|
||
|
|
info: |
|
||
|
|
LexicalBinding : BindingPattern Initializer
|
||
|
|
|
||
|
|
1. Let rhs be the result of evaluating Initializer.
|
||
|
|
2. Let value be GetValue(rhs).
|
||
|
|
3. ReturnIfAbrupt(value).
|
||
|
|
4. Let env be the running execution context's LexicalEnvironment.
|
||
|
|
5. Return the result of performing BindingInitialization for BindingPattern
|
||
|
|
using value and env as the arguments.
|
||
|
|
|
||
|
|
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
|
||
|
|
BindingRestElement : ... BindingIdentifier
|
||
|
|
1. Let lhs be ResolveBinding(StringValue of BindingIdentifier,
|
||
|
|
environment).
|
||
|
|
2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat,
|
||
|
|
a. If iteratorRecord.[[done]] is false,
|
||
|
|
i. Let next be IteratorStep(iteratorRecord.[[iterator]]).
|
||
|
|
ii. If next is an abrupt completion, set iteratorRecord.[[done]] to
|
||
|
|
true.
|
||
|
|
iii. ReturnIfAbrupt(next).
|
||
|
|
|
||
|
|
---*/
|
||
|
|
var first = 0;
|
||
|
|
var second = 0;
|
||
|
|
var iter = function*() {
|
||
|
|
first += 1;
|
||
|
|
throw new Test262Error();
|
||
|
|
second += 1;
|
||
|
|
}();
|
||
|
|
|
||
|
|
assert.throws(Test262Error, function() {
|
||
|
|
const [...x] = iter;
|
||
|
|
});
|
||
|
|
|
||
|
|
iter.next();
|
||
|
|
assert.sameValue(first, 1);
|
||
|
|
assert.sameValue(second, 0, 'Iterator is closed following abrupt completion.');
|