mirror of https://github.com/tc39/test262.git
34 lines
991 B
JavaScript
34 lines
991 B
JavaScript
// Copyright 2021 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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description: Parsing observes the `Yield` production parameter when present
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info: |
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Syntax
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RelationalExpression[In, Yield, Await]:
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[...]
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[+In] RelationalExpression[+In, ?Yield, ?Await] in ShiftExpression[?Yield, ?Await]
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[...]
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1. Let lref be the result of evaluating RelationalExpression.
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2. Let lval be ? GetValue(lref).
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3. Let rref be the result of evaluating ShiftExpression.
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4. Let rval be ? GetValue(rref).
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5. If Type(rval) is not Object, throw a TypeError exception.
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6. Return ? HasProperty(rval, ? ToPropertyKey(lval)).
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esid: sec-relational-operators-runtime-semantics-evaluation
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---*/
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function * isNameIn() {
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return '' in (yield);
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}
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let iter1 = isNameIn();
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iter1.next();
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assert.sameValue(iter1.next({'': 0}).value, true);
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let iter2 = isNameIn();
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iter2.next();
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assert.sameValue(iter2.next({}).value, false);
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