rest-with-arguments.js

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// 'arguments' is allowed with rest parameters.

var args;

function restWithArgs(a, b, ...rest) {

    return arguments;

args = restWithArgs(1, 3, 6, 9);

assertEq(args.length, 4);

assertEq(JSON.stringify(args), '{"0":1,"1":3,"2":6,"3":9}');

args = restWithArgs();

assertEq(args.length, 0);

args = restWithArgs(4, 5);

assertEq(args.length, 2);

assertEq(JSON.stringify(args), '{"0":4,"1":5}');

function restWithArgsEval(a, b, ...rest) {

    return eval("arguments");

args = restWithArgsEval(1, 3, 6, 9);

assertEq(args.length, 4);

assertEq(JSON.stringify(args), '{"0":1,"1":3,"2":6,"3":9}');

function g(...rest) {

    h();

function h() {

    g.arguments;

g();

// eval() is evil, but you can still use it with rest parameters!

function still_use_eval(...rest) {

    eval("x = 4");

still_use_eval();