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comparison: js/src/jit-test/tests/for-of/decompiler.js
js/src/jit-test/tests/for-of/decompiler.js
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| -1:000000000000 | 0:0a940123b625 |
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| 1 // The decompiler correctly handles for-of loops. | |
| 2 | |
| 3 function tokens(code) { | |
| 4 var arr = []; | |
| 5 var s = code.replace(/\w+|[^\s]/g, function (tok) { arr.push(tok); return ""; }); | |
| 6 assertEq(s.trim(), "", "tokens() should find all tokens in code: " + uneval(code)); | |
| 7 return arr; | |
| 8 } | |
| 9 | |
| 10 function test(code) { | |
| 11 var before = "function f() { " + code + " }"; | |
| 12 var after = eval("(" + before + ")").toString(); | |
| 13 assertEq(tokens(before).join(" "), tokens(after).join(" "), "decompiler failed to round-trip"); | |
| 14 } | |
| 15 | |
| 16 // statements | |
| 17 test("for (a of b) { f(a); }"); | |
| 18 test("for (a of b) { f(a); g(a); }"); | |
| 19 | |
| 20 // for-of with "in" operator nearby | |
| 21 test("for (a of b in c ? c : c.items()) { f(a); }"); | |
| 22 | |
| 23 // destructuring | |
| 24 test("for ([a, b] of c) { a.m(b); }"); | |
| 25 | |
| 26 // for-let-of | |
| 27 test("for (let a of b) { f(a); }"); | |
| 28 test("for (let [a, b] of c) { a.m(b); }"); | |
| 29 | |
| 30 // array comprehensions | |
| 31 test("return [a for (a of b)];"); | |
| 32 test("return [[b, a] for ([a, b] of c.items())];"); | |
| 33 | |
| 34 // generator expressions | |
| 35 test("return (a for (a of b));"); | |
| 36 |
