decompiler.js (847B)
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: " + JSON.stringify(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); }");