:c = ()
:choice = 2

:g = $
	|c
	#pouet
	|d

:f = $(anchor=())
	:x = 8
	($_)!from(anchor)
		|a
		*| A
			| b
			c = #pouet
			g!
			| e
			_
				| f
				| g
		*| B
			| boum

		|h {x}

| <<>>
f(c)

| <<>>
choice = 1
f(c)

| <<>>
f(c)