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| 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 |
| 5 // Flags: --harmony-sloppy --harmony-sloppy-let --harmony-sloppy-function |
| 6 |
| 7 // Var-let conflict in a function throws, even if the var is in an eval |
| 8 |
| 9 let caught = false; |
| 10 |
| 11 // Throws at the top level of a function |
| 12 try { |
| 13 (function() { |
| 14 let x = 1; |
| 15 eval('const x = 2'); |
| 16 })() |
| 17 } catch (e) { |
| 18 caught = true; |
| 19 } |
| 20 assertTrue(caught); |
| 21 |
| 22 // If the eval is in its own block scope, throws |
| 23 caught = false; |
| 24 try { |
| 25 (function() { |
| 26 let y = 1; |
| 27 { eval('const y = 2'); } |
| 28 })() |
| 29 } catch (e) { |
| 30 caught = true; |
| 31 } |
| 32 assertTrue(caught); |
| 33 |
| 34 // If the let is in its own block scope, with the eval, throws |
| 35 caught = false |
| 36 try { |
| 37 (function() { |
| 38 { |
| 39 let x = 1; |
| 40 eval('const x = 2'); |
| 41 } |
| 42 })(); |
| 43 } catch (e) { |
| 44 caught = true; |
| 45 } |
| 46 assertTrue(caught); |
| 47 |
| 48 // Legal if the let is no longer visible |
| 49 caught = false |
| 50 try { |
| 51 (function() { |
| 52 { |
| 53 let x = 1; |
| 54 } |
| 55 eval('const x = 2'); |
| 56 })(); |
| 57 } catch (e) { |
| 58 caught = true; |
| 59 } |
| 60 assertFalse(caught); |
| 61 |
| 62 // In global scope |
| 63 caught = false; |
| 64 try { |
| 65 let z = 1; |
| 66 eval('const z = 2'); |
| 67 } catch (e) { |
| 68 caught = true; |
| 69 } |
| 70 assertTrue(caught); |
| 71 |
| 72 // Let declarations beyond a function boundary don't conflict |
| 73 caught = false; |
| 74 try { |
| 75 let a = 1; |
| 76 (function() { |
| 77 eval('const a'); |
| 78 })(); |
| 79 } catch (e) { |
| 80 caught = true; |
| 81 } |
| 82 assertFalse(caught); |
| 83 |
| 84 // var across with doesn't conflict |
| 85 caught = false; |
| 86 try { |
| 87 (function() { |
| 88 with ({x: 1}) { |
| 89 eval("const x = 2;"); |
| 90 } |
| 91 })(); |
| 92 } catch (e) { |
| 93 caught = true; |
| 94 } |
| 95 assertFalse(caught); |
| 96 |
| 97 // var can still conflict with let across a with |
| 98 caught = false; |
| 99 try { |
| 100 (function() { |
| 101 let x; |
| 102 with ({x: 1}) { |
| 103 eval("const x = 2;"); |
| 104 } |
| 105 })(); |
| 106 } catch (e) { |
| 107 caught = true; |
| 108 } |
| 109 assertTrue(caught); |
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