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

_

- k -

• key : pm_assoc_node
• key_length : pm_magic_comment_t
• key_start : pm_magic_comment_t
• keyword_loc : pm_alias_global_variable_node, pm_alias_method_node, pm_break_node, pm_defined_node, pm_next_node, pm_no_keywords_parameter_node, pm_post_execution_node, pm_pre_execution_node, pm_rescue_modifier_node, pm_rescue_node, pm_return_node, pm_super_node, pm_undef_node, pm_unless_node, pm_until_node, pm_when_node, pm_while_node, pm_yield_node
• keyword_rest : pm_parameters_node
• keywords : pm_parameters_node
• klass : RBasic