mirror of https://github.com/tc39/test262.git
23 lines
562 B
JavaScript
23 lines
562 B
JavaScript
// Copyright (C) 2015 André Bargull. All rights reserved.
|
|
// This code is governed by the BSD license found in the LICENSE file.
|
|
|
|
/*---
|
|
info: Operator x-- evaluates its reference expression once.
|
|
description: >
|
|
The operand expression is evaluated exactly once. Operand expression is
|
|
MemberExpression: base[prop]. ToPropertyKey(prop) is not called multiple
|
|
times.
|
|
---*/
|
|
|
|
var propKeyEvaluated = false;
|
|
var base = {};
|
|
var prop = {
|
|
toString: function() {
|
|
assert(!propKeyEvaluated);
|
|
propKeyEvaluated = true;
|
|
return 1;
|
|
}
|
|
};
|
|
|
|
base[prop]--;
|