Is it possible to expose singleton methods to angle script for calling from a script? If so, how? Cheers

I'm not sure I understand what you mean, I'm assuming you want to register a class where the user can not create it, therefore you can guarantee you only have one instance of the class. If so then you'd do it like this:



Then you would register your methods like normal, but no constructor/destructor. Then you can either return a handle of the class from a function, or register it as a global property.

Sorry I thought I was clear. Let me try again.

Suppose that I have a singleton class Log. Within my engine I am doing

Log::getInstance().log("lets rock!");

Now I want the ability to log to the same file from within my running script. So I assume I need to somehow expose this to anglescript. I just wasn't sure if this could be done, or how to do it.

From the script, I just want to be able to do

...
log("foo");
...

Possible?

Cheers

Sure, that's easy. First, write a wrapper. Something like

void log_wrapper(const std::string& str){   Log::get_instance()->log(str);}

Then just bind that to angelscript. See, simple! :)

Deyja is correct.

If you want the script to call the singleton's methods without informing the singleton pointer, then you must wrap the methods in global functions.

I have thought about adding support for registering object methods directly as global functions, by specifying which object to work on, but if I ever do that it will not be for quite some time.

Regards,
Andreas

ah ok

Quote: without informing the singleton pointer,

sorry, what do you mean by this?


cheers

If you don't want to use wrappers, you could do what davekrusu said: Register the singleton as a global property and then call the methods directly on it. In the script it would then look something like this:

Log.write("foo");

That's what I mean by the script informing the singleton pointer, i.e. it explicitly tells the VM what object to call the method on.

Regards,
Andreas

The word you want is probably 'specify'.

Is one method better than another?

It's really just a matter of preference.