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1 // Copyright 2015 the V8 project authors. All rights reserved. | 1 // Copyright 2015 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 // | 4 // |
5 // Flags: --harmony-destructuring | 5 // Flags: --harmony-destructuring |
6 // Flags: --harmony-arrow-functions --strong-mode --allow-natives-syntax | 6 // Flags: --strong-mode --allow-natives-syntax |
7 | 7 |
8 (function() { | 8 (function() { |
9 var f = (function() { | 9 var f = (function() { |
10 "use strong"; | 10 "use strong"; |
11 return function f({ x = function() { return []; } }) { return x(); }; | 11 return function f({ x = function() { return []; } }) { return x(); }; |
12 })(); | 12 })(); |
13 var a = f({ x: undefined }); | 13 var a = f({ x: undefined }); |
14 assertTrue(%IsStrong(a)); | 14 assertTrue(%IsStrong(a)); |
15 | 15 |
16 // TODO(rossberg): Loading non-existent properties during destructuring should | 16 // TODO(rossberg): Loading non-existent properties during destructuring should |
17 // not throw in strong mode. | 17 // not throw in strong mode. |
18 assertThrows(function() { f({}); }, TypeError); | 18 assertThrows(function() { f({}); }, TypeError); |
19 | 19 |
20 function weakf({ x = function() { return []; } }) { return x(); } | 20 function weakf({ x = function() { return []; } }) { return x(); } |
21 a = weakf({}); | 21 a = weakf({}); |
22 assertFalse(%IsStrong(a)); | 22 assertFalse(%IsStrong(a)); |
23 | 23 |
24 function outerf() { return []; } | 24 function outerf() { return []; } |
25 var f2 = (function() { | 25 var f2 = (function() { |
26 "use strong"; | 26 "use strong"; |
27 return function f2({ x = outerf }) { return x(); }; | 27 return function f2({ x = outerf }) { return x(); }; |
28 })(); | 28 })(); |
29 a = f2({ x: undefined }); | 29 a = f2({ x: undefined }); |
30 assertFalse(%IsStrong(a)); | 30 assertFalse(%IsStrong(a)); |
31 })(); | 31 })(); |
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