| // Copyright (C) 2019 Sony Interactive Entertainment Inc. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| esid: sec-optional-chaining-chain-evaluation |
| description: > |
| optional call must preserve this context, as with a non-optional call |
| info: | |
| OptionalChain : ?. Arguments |
| 1. Let thisChain be this OptionalChain. |
| 2. Let tailCall be IsInTailPosition(thisChain). |
| 3. Return ? EvaluateCall(baseValue, baseReference, Arguments, tailCall). |
| features: [optional-chaining] |
| ---*/ |
| |
| const a = { |
| b() { return this._b; }, |
| _b: { c: 42 } |
| }; |
| |
| assert.sameValue(a?.b().c, 42); |
| assert.sameValue((a?.b)().c, 42); |
| |
| assert.sameValue(a.b?.().c, 42); |
| assert.sameValue((a.b)?.().c, 42); |
| |
| assert.sameValue(a?.b?.().c, 42); |
| assert.sameValue((a?.b)?.().c, 42); |
