Syntax Question: What this specific code do?

[mmmrkennedy]

I was looking at the get_weighted_random_perk function in _zm_perk_random (Line 503), and I saw this code:

keys = player [[ level.custom_random_perk_weights ]]();

I've never seen this kind of syntax for other coding languages. What does this do?

[Xerxes]

It runs whichever function level.custom_random_perk_weights is referencing in the context of player and stores the return value in keys.

[mmmrkennedy]

Xerxes Thanks for the response. I found level.custom_random_perk_weights in include_perks_in_random_rotation, and it looks like this:

level.custom_random_perk_weights = ::tomb_random_perk_weights;

Is this just a simple reference to a function that can be called via custom_random_perk_weights later, or does tomb_random_perk_weights get called and referenced when this code is run?

[Xerxes]

That is where the reference is set and not something like in an event driven system where you add yourself to the listeners of an event.