Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 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 |
| 3 | // found in the LICENSE file. |
| 4 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 5 | // let is usable as a variable with var, but not let or ES6 const |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 6 | |
| 7 | (function (){ |
| 8 | assertEquals(undefined, let); |
| 9 | |
| 10 | var let; |
| 11 | |
| 12 | let = 5; |
| 13 | assertEquals(5, let); |
| 14 | |
| 15 | (function() { var let = 1; assertEquals(1, let); })(); |
| 16 | assertEquals(5, let); |
| 17 | })(); |
| 18 | |
| 19 | assertThrows(function() { return let; }, ReferenceError); |
| 20 | |
| 21 | (function() { |
| 22 | var let, sum = 0; |
| 23 | for (let in [1, 2, 3, 4]) sum += Number(let); |
| 24 | assertEquals(6, sum); |
| 25 | |
| 26 | (function() { for (var let of [4, 5]) sum += let; })(); |
| 27 | assertEquals(15, sum); |
| 28 | |
| 29 | (function() { for (var let in [6]) sum += Number([6][let]); })(); |
| 30 | assertEquals(21, sum); |
| 31 | |
| 32 | for (let = 7; let < 8; let++) sum += let; |
| 33 | assertEquals(28, sum); |
| 34 | assertEquals(8, let); |
| 35 | |
| 36 | (function() { for (var let = 8; let < 9; let++) sum += let; })(); |
| 37 | assertEquals(36, sum); |
| 38 | assertEquals(8, let); |
| 39 | })(); |
| 40 | |
| 41 | assertThrows(function() { return let; }, ReferenceError); |
| 42 | |
| 43 | (function () { |
| 44 | let obj = {}; |
| 45 | var {let} = {let() { return obj; }}; |
| 46 | let().x = 1; |
| 47 | assertEquals(1, obj.x); |
| 48 | })(); |
| 49 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 50 | (function() { |
| 51 | function let() { |
| 52 | return 1; |
| 53 | } |
| 54 | assertEquals(1, let()); |
| 55 | })() |
| 56 | |
| 57 | assertThrows('for (let of []) {}', SyntaxError); |