|:module: foo? :: (do something) :shared stack: $x $y $z|
	:shared stack: $z $y $x

|:module: bar? :: (do something) :shared stack: $x $y $z|
	:shared stack: $y $x $z

|:: (do something) :shared stack: $x $y $z|
	:shared stack: ($x $y $z)

|:: ($module {)| :module: $module
|:: } :module: $module|
|:: }|
	:: error :message: unbalanced module usage

||::(
	foo {
		do something
		bar {
			do something
		}
		do something
	}
	do something
) :shared stack: x y z