mirror of
https://github.com/tc39/test262.git
synced 2025-11-04 05:33:50 +01:00
49 lines
1.7 KiB
JavaScript
49 lines
1.7 KiB
JavaScript
// Copyright (C) 2016 the V8 project authors. All rights reserved.
|
|
// This code is governed by the BSD license found in the LICENSE file.
|
|
/*---
|
|
esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
|
|
description: No variable environment is created for the statement body
|
|
info: |
|
|
IterationStatement : for ( ForDeclaration of AssignmentExpression ) Statement
|
|
|
|
[...]
|
|
2. Return ? ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult,
|
|
lexicalBinding, labelSet).
|
|
|
|
13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
|
|
|
|
[...]
|
|
5. Repeat
|
|
[...]
|
|
d. If lhsKind is either assignment or varBinding, then
|
|
[...]
|
|
e. Else,
|
|
i. Assert: lhsKind is lexicalBinding.
|
|
ii. Assert: lhs is a ForDeclaration.
|
|
iii. Let iterationEnv be NewDeclarativeEnvironment(oldEnv).
|
|
iv. Perform BindingInstantiation for lhs passing iterationEnv as the
|
|
argument.
|
|
v. Set the running execution context's LexicalEnvironment to
|
|
iterationEnv.
|
|
[...]
|
|
features: [let]
|
|
---*/
|
|
|
|
var probeBefore = function() { return x; };
|
|
var probeExpr, probeDecl, probeBody;
|
|
var x = 1;
|
|
|
|
for (
|
|
let [_ = probeDecl = function() { return x; }]
|
|
in
|
|
{ '': probeExpr = function() { return x; }}
|
|
)
|
|
var x = 2, __ = probeBody = function() { return x; };
|
|
|
|
|
|
assert.sameValue(probeBefore(), 2, 'reference preceding statement');
|
|
assert.sameValue(probeExpr(), 2, 'reference from AssignmentExpression');
|
|
assert.sameValue(probeDecl(), 2, 'reference from ForDeclaration');
|
|
assert.sameValue(probeBody(), 2, 'reference from statement body');
|
|
assert.sameValue(x, 2, 'reference following statement');
|