(command.CommandList
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      name: _Dbg_usage
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          children: [
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              more_env: []
              words: [
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                {
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                    <'\n'> <'Runs '> ($ Id.VSub_DollarName _Dbg_shell_name) <' <script_file> under a debugger.\n'> <'\n'> 
                    <'options:\n'> <'    -h | --help              Print this help.\n'> 
                    <'    -q | --quiet             Do not print introductory and quiet messages.\n'> <'    -A | --annotate  LEVEL   Set the annotation level.\n'> 
                    <'    -B | --basename          Show basename only on source file listings.\n'> <'                             (Needed in regression tests)\n'> 
                    <
'    --highlight {dark|light} Use dark or light background ANSI terminal sequence\n'
                    > <'                             syntax highlighting\n'> <'       | --no-highlight\n'> 
                    <'                             Don\'t use ANSI terminal sequences for syntax\n'> <'                             highlight\n'> <'    --highlight | --no-highlight\n'> 
                    <
'                             Use or don\'t use ANSI terminal sequences for syntax\n'
                    > <'                             highlight\n'> 
                    <'    --init-file FILE         Source script file FILE. Similar to bash\'s\n'> <'                             corresponding option. This option can be given\n'> 
                    <'                             several times with different files.\n'> <'    -L | --library DIRECTORY\n'> 
                    <
'                             Set the directory location of library helper file: '
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                    <'    -c | --command STRING    Run STRING instead of a script file\n'> <'    -n | --nx | --no-init    Don\'t run initialization files.\n'> 
                    <
'    -S | --style STYLE       Run use pygments STYLE for formatting source code\n'
                    > <'    --tty | --terminal DEV   Set to terminal in debugger output to DEV\n'> 
                    <'                             DEV can also be &1 for STDOUT\n'> <'    -T | --tempdir DIRECTORY\n'> 
                    <'                             Use DIRECTORY to store temporary files\n'> <'    -V | --version           Print the debugger version number.\n'> 
                    <'    -X | --trace             Set line tracing similar to set -x\n'> <'    -x | --eval-command CMDFILE\n'> 
                    <'                             Execute debugger commands from CMDFILE.\n'>
                  )
                }
              ]
              redirects: []
              do_fork: T
            )
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          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
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    )
    (command.ShFunction
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      name: _Dbg_show_version
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              more_env: []
              words: [
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                    (word_part.EscapedLiteral
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                      ch: '"'
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                }
              ]
              redirects: []
              do_fork: T
            )
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          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
    )
    (command.Simple
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      more_env: []
      words: [{<typeset>} {<-xa>} {<_Dbg_orig_script_args>}]
      redirects: []
      do_fork: T
    )
    (command.Simple
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      more_env: []
      words: [
        {<eval>}
        {
          (DQ <'_Dbg_orig_script_args=('> 
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            (word_part.EscapedLiteral token:<Id.Lit_EscapedChar '\\"'> ch:'"') <')'>
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        }
      ]
      redirects: []
      do_fork: T
    )
    (command.Simple
      blame_tok: <typeset>
      more_env: []
      words: [{<typeset>} {<-xa>} {<_Dbg_script_args>}]
      redirects: []
      do_fork: T
    )
    (command.Simple
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      more_env: []
      words: [{<typeset>} {<-i>} {<Id.Lit_VarLike '_Dbg_set_annotate='> <0>}]
      redirects: []
      do_fork: T
    )
    (command.Simple
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      more_env: []
      words: [{<typeset>} {<-i>} {<Id.Lit_VarLike '_Dbg_set_linetrace='> <0>}]
      redirects: []
      do_fork: T
    )
    (command.Simple
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      more_env: []
      words: [{<typeset>} {<-i>} {<Id.Lit_VarLike '_Dbg_set_basename='> <0>}]
      redirects: []
      do_fork: T
    )
    (command.Simple
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      more_env: []
      words: [{<typeset>} {<Id.Lit_VarLike '_Dbg_set_highlight='> (SQ )}]
      redirects: []
      do_fork: T
    )
    (command.CommandList
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              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<-a>} {<_Dbg_o_init_files>}]
              redirects: []
              do_fork: T
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          terminator: <Id.Op_Semi _>
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          redirects: []
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    )
    (command.Simple
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      more_env: []
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      redirects: []
      do_fork: T
    )
    (command.Simple
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      more_env: []
      words: [{<typeset>} {<-ix>} {<_Dbg_working_term_highlight>}]
      redirects: []
      do_fork: T
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                      do_fork: T
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                )
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            )
          then_kw: <Id.KW_Then then>
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              redirects: []
            )
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          spids: [256 273]
        )
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      else_kw: <Id.KW_Else else>
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      redirects: []
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    (command.Simple
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      more_env: []
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      do_fork: T
    )
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        (command.Simple
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          redirects: []
          do_fork: T
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    )
    (command.ShFunction
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      name: _Dbg_check_tty
      body: 
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              ops: [<Id.Op_DAmp _>]
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            (command.Simple
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              more_env: []
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              do_fork: T
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                              redirects: []
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                        )
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                    )
                  then_kw: <Id.KW_Then then>
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                                                    do_fork: T
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                                                right: <Id.Eof_RParen _>
                                              )
                                            }
                                          ]
                                          redirects: []
                                          do_fork: T
                                        )
                                      ]
                                      ops: []
                                    )
                                  terminator: <Id.Op_Semi _>
                                )
                              ]
                            )
                          then_kw: <Id.KW_Then then>
                          action: [
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                              more_env: []
                              words: [
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                                {(DQ <'Can\'t access '> ($ Id.VSub_DollarName tty) <' for writing.'>)}
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                              redirects: []
                              do_fork: T
                            )
                            (command.ControlFlow
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                          spids: [365 382]
                        )
                      ]
                      else_action: []
                      fi_kw: <Id.KW_Fi fi>
                      redirects: []
                    )
                    (command.If
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                      arms: [
                        (IfArm
                          keyword: <Id.KW_If if>
                          cond: 
                            (condition.Shell
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                                        (bool_expr.LogicalNot
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                                            (bool_expr.Unary
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                                      redirects: []
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                                  terminator: <Id.Op_Semi _>
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                            )
                          then_kw: <Id.KW_Then then>
                          action: [
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                              more_env: []
                              words: [
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                              redirects: []
                              do_fork: T
                            )
                            (command.ControlFlow
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                          spids: [402 416]
                        )
                      ]
                      else_action: []
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                      redirects: []
                    )
                    (command.ShAssignment
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                      pairs: [
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                      redirects: []
                    )
                    (command.ShAssignment
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                      redirects: []
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                  spids: [346 362]
                )
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              else_action: []
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              redirects: []
            )
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          redirects: []
          right: <Id.Lit_RBrace '}'>
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    )
    (command.ShFunction
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      name: _Dbg_parse_options
      body: 
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          left: <Id.Lit_LBrace '{'>
          children: [
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              blame_tok: <.>
              more_env: []
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              redirects: []
              do_fork: T
            )
            (command.Simple
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              more_env: []
              words: [{<typeset>} {<-i>} {<Id.Lit_VarLike '_Dbg_o_quiet='> <0>}]
              redirects: []
              do_fork: T
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<-i>} {<Id.Lit_VarLike '_Dbg_o_version='> <0>}]
              redirects: []
              do_fork: T
            )
            (command.WhileUntil
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              cond: 
                (condition.Shell
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                      more_env: []
                      words: [
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                        {<A> <Id.Lit_Colon ':'> <Bc> <Id.Lit_Colon ':'> <x> <Id.Lit_Colon ':'> <hL> 
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                        {<opt>}
                        {<annotate>}
                        {<required_argument>}
                        {<basename>}
                        {<no_argument>}
                        {<command>}
                        {<required_argument>}
                        {<debugger>}
                        {<no_argument>}
                        {<eval-command>}
                        {<required_argument>}
                        {<help>}
                        {<no_argument>}
                        {<highlight>}
                        {<required_argument>}
                        {<init-file>}
                        {<required_argument>}
                        {<library>}
                        {<required_argument>}
                        {<no-highlight>}
                        {<no_argument>}
                        {<no-init>}
                        {<no_argument>}
                        {<nx>}
                        {<no_argument>}
                        {<quiet>}
                        {<no_argument>}
                        {<tempdir>}
                        {<required_argument>}
                        {<tty>}
                        {<required_argument>}
                        {<terminal>}
                        {<required_argument>}
                        {<version>}
                        {<no_argument>}
                        {(SQ )}
                        {(DQ ($ Id.VSub_At '@'))}
                      ]
                      redirects: []
                      do_fork: T
                    )
                  ]
                )
              body: 
                (command.DoGroup
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                  children: [
                    (command.Case
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                      to_match: (case_arg.Word w:{(DQ ($ Id.VSub_DollarName opt))})
                      arms_start: <Id.KW_In in>
                      arms: [
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                          pattern: (pat.Words words:[{<A>} {<annotate>}])
                          middle: <Id.Right_CasePat _>
                          action: [
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                                  op: assign_op.Equal
                                  rhs: {($ Id.VSub_DollarName OPTLARG)}
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                              redirects: []
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                          right: <Id.Op_DSemi _>
                        )
                        (CaseArm
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                              redirects: []
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                        (CaseArm
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                                  op: assign_op.Equal
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                              redirects: []
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                        (CaseArm
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                              more_env: []
                              words: [{<_Dbg_usage>}]
                              redirects: []
                              do_fork: T
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                        (CaseArm
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                                      redirects: []
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                                  right: <Id.Op_DSemi _>
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                                (CaseArm
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              do_fork: T
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              more_env: []
              words: [{<typeset>} {<-p>} {<_Dbg_set_linetrace>}]
              redirects: []
              do_fork: T
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            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<-p>} {<_Dbg_set_basename>}]
              redirects: []
              do_fork: T
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      fi_kw: <Id.KW_Fi fi>
      redirects: []
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