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js/src/jit-test/tests/for-of/decompiler.js@6474c204b198 (annotated)

js/src/jit-test/tests/for-of/decompiler.js

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

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