decompiler.js - mozsearch

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// The decompiler correctly handles for-of loops.

function tokens(code) {

    var arr = [];

    var s = code.replace(/\w+|[^\s]/g, function (tok) { arr.push(tok); return ""; });

    assertEq(s.trim(), "", "tokens() should find all tokens in code: " + JSON.stringify(code));

    return arr;

function test(code) {

    var before = "function f() { " + code + " }";

    var after = eval("(" + before + ")").toString();

    assertEq(tokens(before).join(" "), tokens(after).join(" "), "decompiler failed to round-trip");

// statements

test("for (a of b) { f(a); }");

test("for (a of b) { f(a); g(a); }");

// for-of with "in" operator nearby

test("for (a of b in c ? c : c.items()) { f(a); }");

// destructuring

test("for ([a, b] of c) { a.m(b); }");

// for-let-of

test("for (let a of b) { f(a); }");

test("for (let [a, b] of c) { a.m(b); }");