mirror of https://github.com/tc39/test262.git
27 lines
910 B
JavaScript
27 lines
910 B
JavaScript
// Copyright (c) 2020 Ecma International. 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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esid: sec-assignment-operators-runtime-semantics-evaluation
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description: Logical Nullish Assignment Operator
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features: [BigInt, logical-assignment-operators]
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info: |
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AssignmentExpression:
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LeftHandSideExpression ??= AssignmentExpression
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1. Let lref be the result of evaluating LeftHandSideExpression.
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2. Let lval be ? GetValue(lref).
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3. If lval is neither undefined nor null, return lval.
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4. Let rref be the result of evaluating AssignmentExpression.
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5. Let rval be ? GetValue(rref).
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6. Perform ? PutValue(lref, rval).
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7. Return rval.
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---*/
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var value = 0n;
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assert.sameValue(value ??= 1n, 0n, "(value ??= 1n) === 0n; where value = 0n");
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value = 2n;
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assert.sameValue(value ??= 1n, 2n, "(value ??= 1n) === 2n; where value = 2n");
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