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// 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];
reportCompare(0, 0);