a.rb

% ruby --dump parsetree
class Post
class << self
end
end
###########################################################
## Do NOT use this node dump for any purpose other than  ##
## debug and research.  Compatibility is not guaranteed. ##
###########################################################
# @ NODE_SCOPE (line: 4)
# +- nd_tbl: (empty)
# +- nd_args:
# |   (null node)
# +- nd_body:
#     @ NODE_CLASS (line: 1)
#     +- nd_cpath:
#     |   @ NODE_COLON2 (line: 1)
#     |   +- nd_mid: :Post
#     |   +- nd_head:
#     |       (null node)
#     +- nd_super:
#     |   (null node)
#     +- nd_body:
#         @ NODE_SCOPE (line: 4)
#         +- nd_tbl: (empty)
#         +- nd_args:
#         |   (null node)
#         +- nd_body:
#             @ NODE_SCLASS (line: 2)
#             +- nd_recv:
#             |   @ NODE_SELF (line: 2)
#             +- nd_body:
#                 @ NODE_SCOPE (line: 3)
#                 +- nd_tbl: (empty)
#                 +- nd_args:
#                 |   (null node)
#                 +- nd_body:
#                     @ NODE_BEGIN (line: 3)
#                     +- nd_body:
#                         (null node)