ruby --dump parsetree lex4.rb

gistfile1.txt

[mechanic@dwave-laptop learning_ruby]$ ruby --dump parsetree lex4.rb 
###########################################################
## Do NOT use this node dump for any purpose other than  ##
## debug and research.  Compatibility is not guaranteed. ##
###########################################################

# @ NODE_SCOPE (line: 11)
# +- nd_tbl: :code
# +- nd_args:
# |   (null node)
# +- nd_body:
#     @ NODE_BLOCK (line: 1)
#     +- nd_head:
#     |   @ NODE_FCALL (line: 1)
#     |   +- nd_mid: :require
#     |   +- nd_args:
#     |       @ NODE_ARRAY (line: 1)
#     |       +- nd_alen: 1
#     |       +- nd_head:
#     |       |   @ NODE_STR (line: 1)
#     |       |   +- nd_lit: "ripper"
#     |       +- nd_next:
#     |           (null node)
#     +- nd_next:
#         @ NODE_BLOCK (line: 2)
#         +- nd_head:
#         |   @ NODE_FCALL (line: 2)
#         |   +- nd_mid: :require
#         |   +- nd_args:
#         |       @ NODE_ARRAY (line: 2)
#         |       +- nd_alen: 1
#         |       +- nd_head:
#         |       |   @ NODE_STR (line: 2)
#         |       |   +- nd_lit: "pp"
#         |       +- nd_next:
#         |           (null node)
#         +- nd_next:
#             @ NODE_BLOCK (line: 8)
#             +- nd_head:
#             |   @ NODE_DASGN_CURR (line: 4)
#             |   +- nd_vid: :code
#             |   +- nd_value:
#             |       @ NODE_STR (line: 4)
#             |       +- nd_lit: "10.times do |n|\n  puts n\nend\n"
#             +- nd_next:
#                 @ NODE_BLOCK (line: 10)
#                 +- nd_head:
#                 |   @ NODE_FCALL (line: 10)
#                 |   +- nd_mid: :puts
#                 |   +- nd_args:
#                 |       @ NODE_ARRAY (line: 10)
#                 |       +- nd_alen: 1
#                 |       +- nd_head:
#                 |       |   @ NODE_DVAR (line: 10)
#                 |       |   +- nd_vid: :code
#                 |       +- nd_next:
#                 |           (null node)
#                 +- nd_next:
#                     @ NODE_BLOCK (line: 11)
#                     +- nd_head:
#                     |   @ NODE_FCALL (line: 11)
#                     |   +- nd_mid: :pp
#                     |   +- nd_args:
#                     |       @ NODE_ARRAY (line: 11)
#                     |       +- nd_alen: 1
#                     |       +- nd_head:
#                     |       |   @ NODE_CALL (line: 11)
#                     |       |   +- nd_mid: :sexp
#                     |       |   +- nd_recv:
#                     |       |   |   @ NODE_CONST (line: 11)
#                     |       |   |   +- nd_vid: :Ripper
#                     |       |   +- nd_args:
#                     |       |       @ NODE_ARRAY (line: 11)
#                     |       |       +- nd_alen: 1
#                     |       |       +- nd_head:
#                     |       |       |   @ NODE_DVAR (line: 11)
#                     |       |       |   +- nd_vid: :code
#                     |       |       +- nd_next:
#                     |       |           (null node)
#                     |       +- nd_next:
#                     |           (null node)
#                     +- nd_next:
#                         (null node)