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Misplaced arguments? - WoWInterface
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03-02-15, 04:12 AM   #1
Leapin
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Misplaced arguments?

So I'm working on my first Lua script and I thought I'd make a simple addon without any XML and without the need of extra frames and stuff, either way, what I am trying to do is whenever someone joins the guild, it will announce in gchat "Welcome name", however, for some reason, the "msg" argument seem to be gone from the function. The event says the args are message, sender, language, channel, target etc etc, but when I try to call the first argument, instead of message, it's sender.

Code:
local gAuto = CreateFrame("Frame")

gAuto:RegisterEvent("CHAT_MSG_GUILD")
gAuto:SetScript("OnEvent", function(self, event, ...)
 self[event](...)
end)

	function gAuto:CHAT_MSG_GUILD(msg, sender, ...) -- msg = senderName instead of message, and sender = language instead of sender name?
		local str = "has joined the guild"
		name = string.gsub(sender, "-TarrenMill", "")
		name = string.gsub(sender, "-Dentarg", "")
		local welcome = "Všlkommen "..name.." :)"
		
		--[[
		if string.find(msg, str) then
				SendChatMessage(welcome, "GUILD")
		else
			return
		end
		--]]
	end
I am really lost, I have no idea what I am doing wrong, any help is appreciated
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03-02-15, 04:44 AM   #2
Elkano
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Your call self[event](...) is the culprit. It resullts in the call self.CHAT_MSG_GUILD(...) instead of self:CHAT_MSG_GUILD(...). The latter is equivalent to self.CHAT_MSG_GUILD(self, ...).

So simply changing self[event](...) to self[event](self, ...) should do the trick.
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03-02-15, 05:00 AM   #3
Leapin
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Join Date: Mar 2015
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Originally Posted by Elkano View Post
Your call self[event](...) is the culprit. It resullts in the call self.CHAT_MSG_GUILD(...) instead of self:CHAT_MSG_GUILD(...). The latter is equivalent to self.CHAT_MSG_GUILD(self, ...).

So simply changing self[event](...) to self[event](self, ...) should do the trick.
That seem to have fixed it, I am still curious, why do we write "self[event]()" instead of "self:event()"?
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03-02-15, 05:28 AM   #4
Elkano
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The following three are equivalent:
- self.event(self)
- self:event()
- self["event"](self)

if however event is a variable (in contrast to the string "event"), your only way of calling is
- self[event]()
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Last edited by Elkano : 03-02-15 at 05:49 AM.
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03-02-15, 05:39 AM   #5
Leapin
A Defias Bandit
Join Date: Mar 2015
Posts: 3
Originally Posted by Elkano View Post
The following three are equivalent:
- self.event(self)
- self:event()
- self["event"]()

if however event is a variable (in contrast to the string "event"), your only way of calling is
- self[event]()
Ah yes, ofcourse. Thank you

Last edited by Leapin : 03-02-15 at 05:41 AM.
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