Why is my Try and Catch not working?

[Rydrako]

Hello, I have a very annoying problem. I have my game save all these variables to a certain file path that I believe should work on all computers but, in case it doesn’t work I would like my game to notice that it fails to save and show up a GUI box saying my custom fail message to the player. So I tried this:

 // Close the file (^ above is where I write the var's into the file)
saveStream.Close();

try 
{ 

	throw saveStream.Close ();
} 

catch (err)
{

		MoveAround.saveFailed = true;
		return;
}

// Give confirmation that the file has been saved

print ( "Data Saved at: " + filePath2 + "/" + fileName2 );

MoveAround.saveWork = true;

in the save script’s save function, and I get these errors:

'void' is not a valid argument type for throw, only strings and exceptions are allowed.

so um…HOW DO I FIX THIS (I’ve seen a c# example but not a javascript example of a try+catch)!!! Your help will be greatly appreciated!

[Bunny83]

The keywork throw is used to manually throw an exception. Like the error states: throw must be followed by an instantce of an exception class or a string.

If you just want catch errors that happens during saveStream.Close() just remove the “throw”. All eaxceptions that are thrown within a try - catch block are catched by the nearest try-catch-block.

try 
{ 
    saveStream.Close ();
}
catch (err)
{
    MoveAround.saveFailed = true;
    return;
}

Here’s a simple example of throw:

try
{
    throw "Error, plz abort";
    Debug.Log("This will never execute");
}
catch(err)
{
    Debug.Log("Exception catched: " + err);
}

ps: the code is not tested and i’m not sure if the syntax is the same in UnityScript