Is there an equivalent of global variable ? Modifying a variable outside current scope and context

[SillyFreak]

@Alex

I’m trying to implement the solution like this :

//in utils.typ
#let index_dict = state("index_dict", (:))

// in format.typ

#let chant(...) = context{
  let dict = utils.index_dict.get()
  dict.insert(title,utils.get_page_number())
  utils.index_dict.update(dict)
}

I get a warning :
Layout did not converge within 5 attempts (warning)

In this case the cause is actually fairly clear: you use get() followed by update() instead of update with a callback. Here is a post where I explain in detail what the problem and fix for it is: Why is State Final not "final"? - #2 by SillyFreak

@Alex

I will search to prevent this.

edit : set the size of heading to 0pt

show heading: text.with(size: 0pt)
hide(heading(title))

a bit “cleaner” is I think using place(hide(...)) which prevents the header from being considered for layout at all.

But the state based solution Mathemensch shows (using update(songs => ...) looks good :) I don’t think it has convergence problems.The update() is inside a context and depends on a get() but I think it’s fine because it’s a different counter.