function - In lua, is there forward declaration?

Question

I wrote quite a lot of functions that call one another, in lua.

Is there, in lua, such a concept as "forward declaration" ?

That would allow me to declare all functions with no implementation and then implement them later. I would then get rid of the order of the functions problem.

question from:https://stackoverflow.com/questions/65849897/in-lua-is-there-forward-declaration

Answer 1

yes the visibility goes from top to bottom. You can declare locals with no value.

local func -- Forward declaration. `local func = nil` is the same.

local function func2() -- Suppose you can't move this function lower.
    return func() -- used here
end

function func() -- defined here
    return 1
end