[ruby-core:115715] [Ruby master Misc#20035] Command-line settings move from parser to compiler

Issue #20035 has been updated by nobu (Nobuyoshi Nakada).


Do you mean passing these to both of the parser and the compiler?

----------------------------------------
Misc #20035: Command-line settings move from parser to compiler
https://bugs.ruby-lang.org/issues/20035#change-105644

* Author: kddnewton (Kevin Newton)
* Status: Open
* Priority: Normal
----------------------------------------
Right now, when you pass `-n`, `-p`, `-l`, or `-a`, these options are all passed to the parser to manipulate the parse tree into giving you the desired behavior. For example:

$ ruby --dump=parsetree -p -e "foo"
``` ruby
###########################################################
## Do NOT use this node dump for any purpose other than  ##
## debug and research.  Compatibility is not guaranteed. ##
###########################################################

# @ NODE_SCOPE (id: 1, line: 1, location: (1,0)-(1,3))
# +- nd_tbl: (empty)
# +- nd_args:
# |   (null node)
# +- nd_body:
#     @ NODE_WHILE (id: 10, line: 1, location: (1,0)-(1,0))
#     +- nd_state: 1 (while-end)
#     +- nd_cond:
#     |   @ NODE_FCALL (id: 9, line: 1, location: (1,0)-(1,0))
#     |   +- nd_mid: :gets
#     |   +- nd_args:
#     |       @ NODE_LIST (id: 8, line: 1, location: (1,0)-(1,0))
#     |       +- nd_alen: 1
#     |       +- nd_head:
#     |       |   @ NODE_GVAR (id: 7, line: 1, location: (1,0)-(1,0))
#     |       |   +- nd_entry: :$/
#     |       +- nd_next:
#     |           (null node)
#     +- nd_body:
#         @ NODE_BLOCK (id: 5, line: 1, location: (1,0)-(1,0))
#         +- nd_head (1):
#         |   @ NODE_VCALL (id: 0, line: 1, location: (1,0)-(1,3))*
#         |   +- nd_mid: :foo
#         +- nd_head (2):
#             @ NODE_FCALL (id: 4, line: 1, location: (1,0)-(1,0))
#             +- nd_mid: :print
#             +- nd_args:
#                 @ NODE_LIST (id: 3, line: 1, location: (1,0)-(1,0))
#                 +- nd_alen: 1
#                 +- nd_head:
#                 |   @ NODE_GVAR (id: 2, line: 1, location: (1,0)-(1,0))
#                 |   +- nd_entry: :$_
#                 +- nd_next:
#                     (null node)
```

Could this mutation be moved into the compiler? That way it could be shared by prism, but also because it would make it less confusing when people are running `--dump=parsetree` as to why a loop is being inserted.



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