checking if CVar exists

[CrittenxD]

Yo, I've been looking for a while and I haven't found something. I simply want to check if a cvar actually exists in case some get removed before Classic release. The following example produces an error if the cvar doesnt exist:

function setcvarifexists(cvar, value)
if GetCVarDefault(cvar) then SetCVar(cvar, value)
end
end

I'm looking for a replacement for GetCVarDefault(cvar) which just checks if the cvar exists.

EDIT: I'm also looking for a command to update all cvars similar to RestartGx(). For example the Timestamp setting will only load after reloading ui.

[Xrystal]

Have you tried just using SetCVar and use the return value and the event if necessary to continue the code process.

https://wow.gamepedia.com/API_C_CVar.SetCVar


The other option is to use the static variable NUM_LE_EXPANSION_LEVELS that is set to 1 for Classic and use that as a guide for Classic based functionality access and make any necessary changes using an if statement block, if you were hoping to have one source code base for both versions.

[CrittenxD]

I'm getting an error as soon as im calling SetCvar or GetCvarDefault with a nonexisting CVar. "Couldn't find a CVar named 'xdtest'".

[SDPhantom]

You can use pcall() to capture the error and prevent it from being raised. If an error occurs, it instead returns false plus the error message as a string. Otherwise, if successful, it returns true with the returns from the called function appended.

[CrittenxD]

Thank you very much for this great solution!

function setcvarifexists(cvar, value)
if pcall(SetCVar, cvar, value) then
else DEFAULT_CHAT_FRAME:AddMessage("|cffff0000Cvar not found: "..cvar)
end
end

Only one call, I'm super happy with that! Gonna look into the secure action button from my other thread now