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comparison: js/src/jit-test/tests/for-of/semantics-10.js
js/src/jit-test/tests/for-of/semantics-10.js
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:eda0a37e012d |
|---|---|
| 1 // The LHS of a for-loop is not bound to a particular scope until after the .next() method returns. | |
| 2 | |
| 3 var obj = {}; | |
| 4 | |
| 5 // Test 1 | |
| 6 function g() { | |
| 7 obj.x = 0; | |
| 8 yield 1; | |
| 9 } | |
| 10 var x = 2, n = 0; | |
| 11 with (obj) { | |
| 12 for (x of g()) // g().next() inserts a binding for x on obj | |
| 13 n++; | |
| 14 } | |
| 15 assertEq(x, 2); | |
| 16 assertEq(obj.x, 1); | |
| 17 assertEq(n, 1); | |
| 18 | |
| 19 // Test 2 | |
| 20 function h() { | |
| 21 delete obj.x; | |
| 22 yield 3; | |
| 23 } | |
| 24 n = 0; | |
| 25 with (obj) { | |
| 26 for (x of h()) // h().next() deletes the binding for x on obj | |
| 27 n++; | |
| 28 } | |
| 29 assertEq(x, 3); | |
| 30 assertEq("x" in obj, false); | |
| 31 assertEq(n, 1); |
