Here is a list of all documented variables with links to the struct/union documentation for each field:

A

B

C

D

E

F

G

H

I

K

L

M

N

O

P

Q

R

S

T

U

V

W

_

- u -

• unescaped : pm_match_last_line_node, pm_regular_expression_node, pm_string_node, pm_symbol_node, pm_x_string_node
• usecnt : RRegexp