How to use `...any`, as the type, in a table

[Bettleeeeeeee (Bettlee)]

I am wondering how it is possible to use ...any like so, { ...any }, in a table?

[MysteryX2076 (DrMystery)]

type Pair <a,b> = {
   first : a
   second : b
}

The Pair is basically a table accepting any type that you supply through a function when you supply 2 parameters

[Bettleeeeeeee (Bettlee)]

What if there’s a third? Can’t keep adding

[greenboo5]

type tblGeneric<K, V> = {[K]: V}
local myTbl: tblGeneric<any, any>

Something like this? K is key type, V is value type

[MysteryX2076 (DrMystery)]

You can add as many as you like as long there are enough ‘types’ for them

type Pair <a,b,c,d>= {
   first : a
   second : b
   third : c
   fourth : d
}

[OniiSamaUwU (UwU)]

The ... is only used for variadic arguments and in returned values. You cannot use ... in an array since you can only define the entire array’s value type, so you would have to use {any}.

--!strict

-- any type
local function foo(...: any): ...any
	return ...
end

local arg1, arg2 = foo(1, 2) -- typed as ...any
print(arg1, arg2) -- 1, 2

local function foo(...: any): {any}
	return {...}
end

local args = foo(1, 2) -- typed as {any}
print(args[1], args[2]) -- 1, 2

-- generic type
local function bar<T>(...: T): (...T)
	return ...
end

local arg1, arg2 = bar(1, 2) -- typed as ...number
print(arg1, arg2) -- 1, 2

local function bar<T>(...: T): {T}
	return {...}
end

local args = bar(1, 2) -- typed as {number}
print(args[1], args[2])

[greenboo5]

If you’d like a dictionary with some defined types but allow new items without making Luau angry:

type myTable = {
   example1: number,
   example2: boolean,
   [string]: any -- Additional items are okay
}