Authors CurseForge

Quote from cralor

When the error mentions this, it's like mentioning that Blizzard's code is wrong.

function Table:Method()

Table.Method()

function RIA:OnEvent(event, ...)

RIA.eventFrame:SetScript("OnEvent", RIA.OnEvent)

There's no special correspondence between "declaration" and "call" syntax in Lua. (Functions aren't really "declared" as in imperative languages, there's no function signature here.)

Using colon notation when defining a function just means "there will be a hidden first parameter, and it will be called 'self'".

1. function(param1, param2)
       --body
   end

That's a function declaration, isn't it? It's defining the parameter list. I can call it with no parameters [as ___()] and it just passes nil for each one, but I can't call it with more parameters than what it was originally "declared" as having and expect those extra values to be accessible. I'd have to put the vararg in there explicitly to be able to use it within the function scope (to make it a "vararg function", I think the error message says).

2. Your use of the phrasing "there will be" also seems to imply that something is "set" when code like the above is written.

local f = {}

function f.Dot(name)
	print(type(name))
end

function f:Colon()
	print(self == nil)
end

f:Dot("Johnny") -- this prints "table"
f.Colon() -- this prints "true"

function onEvent(frame, event, ...)
end

aFrame:SetScript("OnEvent", onEvent)

function aTable:OnEvent(event, ...)
end

aFrame:SetScript("OnEvent", aTable.OnEvent)

Quote from Pelf

I think it's clear now that if a function is not either defined on a table with colon syntax or manually defined with its first parameter reserved for a frame, it cannot later be called that way.

function MyAddon.DoStuff()
    self:Show()
end

MyAddon:DoStuff()

local function PrintSomething()
    print("MyAddon:", message)
end

PrintSomething("Hello world!")

local function PrintSomething([b][i]message[/i][/b])