Detecting the type of EnumItem

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#1

Hello,

I’m writing a script which the user configures in a config script.
In one of the configuration fields, the user is asked to provide a font.

This is how it’s defined.

local font = Enum.Font.Gotham

In my main script, I’m trying to validate that the font variable is a Font. If the variable isn’t a font it sets it to a different font. However, when calling typeof on the value it just displays as EnumItem.

Is there a way I can detect what type of item the variable is?

E.G typeof(font) -> EnumItem.Font (the actual typeof returns EnumItem as described above).

#2

typeof is used for determining what type of thing the variable is. So when you called it since “Enum.Font.Gotham” is a type of EnumItem, it printed that out.

whoops sorry, my mistake I was thinking properly for the printing part.

#3

This wouldn’t work as you’re printing the value to the output stream.

(you can capture the output stream but it’s a hacky method)

#4

You are able to do Enum.Font["the name of the font"], you can probably check if the font.Name exists in Enum.Font by simply doing.

if Enum.Font[font.Name] then

end

No idea if this would work

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#5

I’ve tried your idea. Unfortunately, it doesn’t work. When you perform tostring on the font variable it produces Enum.Font.blahblah not blahblah.

#6

Yeah just did a quick fix, do .Name at the end instead maybe.

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#7

A possible solution would be to first convert the Enum to a string.

Screen Shot 2020-03-14 at 12.42.51 PM
Screen Shot 2020-03-14 at 12.42.51 PM876×162 18.2 KB

Then you could just manipulate the string to get the text between the periods, Font

And to convert this to the “Font” Enum, you could just do

thisEnum = Enum["Font"]

Of course “Font” would be replaced with the text between the periods, but this should work as a way to get the higher level Enum.

Here’s a code example I made:

local lowerLevelEnum = Enum.Font.Gotham

function GetHighestLevelEnum(lower)
	lower  = tostring(lower)
	local FirstPeriodIndex = string.find(lower,".",1,true)
	local SecondPeriodIndex = string.find(lower,".",FirstPeriodIndex+1,true)
	local UpperLevelEnum = string.sub(lower,FirstPeriodIndex+1,SecondPeriodIndex-1)
	return Enum[UpperLevelEnum]
end

local UpperLevelEnum = GetHighestLevelEnum(lowerLevelEnum) --> Enum.Font
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#8

Thank you @starmaq & @Vmena! I’ve managed to create a little function based of your ideas.

function isFont(obj)
	if typeof(obj) == "EnumItem" then
		return ({pcall(function()
			local x = Enum.Font[obj.Name]
		end)})[1]
	else
		return false
	end
end

If I run the following I get the following results:

isFont(Enum.Font.Antique) -> true
isFont(Enum.ActionType.Draw) -> false

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