Javascript function parameter names at time of call?

Question

I know this is a really long shot, but I figure I'd ask: Is there a way to to find the names of the variables passed as parameters in a function call?

Assuming I have:

function test(tmp1, tmp2) {
  // ...
}

var a;
var b;

test(a, b);

I'd like to get an array like so: [a, b]. Strings would also be acceptable: ["a", "b"].

I do not want ["tmp1", "tmp2"], which I know I can get by parsing the string representation of the function.

I'm asking because I'm trying to to improve my caseclass.js library with real extractors (see the link for more information). I understand that only objects are passed by reference, so I'm trying to find a work around to pass the values extracted back to the placeholder variables.

Thanks!

Answer 1

Maybe you'd like to take a look at the eval() function... but I've never done something like you describe with javascript. I'm not even sure it's possible.

Answer 2

maybe you could look into the stacktrace caused by an exception or error, but I'm not certain it would work, and it would probably work differently in different browsers.

Answer 3

How about doing something like this:

var a = { name: 'a', value: 'foo' };
var b = { name: 'b', value: 'bar' };

test(a, b);

function test(tmp1, tmp2)
{
   var paramArray = [ tmp1.name, tmp1.name ];
}