OOP how to override functions

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#1

So I’m trying to make a layout for ranged class and I want to know whats a good way to override the functions if a certain class needs to make modification on the base functions like using custom callbacks.

function BanditArcher:Reward()
	
end

function BanditArcher:Destroy()
	
end

function BanditArcher:Shoot()
	
end

function BanditArcher:Retreat()
	
end

function BanditArcher:MoveToPlayer()
	
end

function BanditArcher:FindNearestPlayer()
	
end

function BanditArcher:gameLoop()
	
end
#2

so like making proxies, well, i have been messing with that same thing for quite a bit so i can help a bit
normally, i store my new functions inside a table, and i make the code loop through that table and check if the base code has a similar index, if it does, overriding it is as simple as setting the base’s value at that index to the new table’s value
Kinda like this

for index, v in pairs(newFunctions) do
		if code[index] then
			if typeof(code[index]) == typeof(v) then
				code[index] = v
				warn(`overwrote {index}`)
			else
				warn(`Type mismatch for {index}, keeping original function.`)
			end
		else
			code[index] = v
			warn(`wrote {index}`)
		end
	end

it basically just loops through the table and replaces values, it’s not really complicated, but it can be tricky

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#3

Metatables?

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#4
Metatables.
2 Likes
#5

I use this method that mimics classes and inheritance.

local BaseObject = {}
BaseObject.__index = BaseObject

function BaseObject.new()
    local newObject = setmetatable({}, BaseObject)

    return newObject
end

local ChildObject= setmetatable({}, {__index = BaseObject})
ChildObject.__index = ChildObject

function ChildObject.new()
    local childObject = setmetatable(BaseObject.new(), ChildObject)

    return childObject
end

local ChildOfChildObject= setmetatable({}, {__index = ChildObject})
ChildOfChildObject.__index = ChildOfChildObject

function ChildOfChildObject.new()
    local childObject = setmetatable(ChildObject.new(), ChildOfChildObject)

    return childObject
end

Having a method in the childObject overrides the methods in the parent object. Likely inefficient but looks nice so I use it.

1 Like