| // '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(); |