2 // productions which match indentation-balanced text regions; that is,
3 // regions in which the indentation level of all parts of the region
4 // is strictly non-negative relative to the start of the region.
6 // A region which is indentation-balanced: no prefix of the region
7 // contains more outdents than indents.
8 Balanced! = Balanced ~[>><<]
9 | Balanced >> Balanced <<
12 // A region which is unbalanced: some prefix has more outdents than
13 // indents. May be faster to match than (~~Balanced).
16 | >> UnBalanced UnBalanced