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                )
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                        left_token: <Id.Left_DollarParen '$('>
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                                left_token: <Id.Left_Backtick '`'>
                                child: (C {<dirname>} {($ Id.VSub_Number '$0')})
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            (command.If
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                    (condition.Shell
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                            (command.DBracket
                              expr: 
                                (bool_expr.Unary
                                  op_id: Id.BoolUnary_z
                                  child: {(DQ ($ Id.VSub_DollarName '$EQUIVS'))}
                                )
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  action: [
                    (command.Simple
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                        (redir
                          op: <Id.Redir_GreatAnd '1>&'>
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                      ]
                      do_fork: T
                    )
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              ]
            )
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        )
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    )
    (command.ShAssignment
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          op: assign_op.Equal
          rhs: 
            {
              (DQ 
                (command_sub
                  left_token: <Id.Left_DollarParen '$('>
                  child: 
                    (command.Pipeline
                      children: [
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                      ]
                      negated: F
                    )
                )
              )
            }
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        )
      ]
    )
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      cond: 
        (condition.Shell
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        )
      body: 
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                        (command_sub
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                                (C {<sed>} {(SQ <'s/, */|/g'>)})
                                (C {<tr>} {(SQ <' '>)} {(SQ <_>)})
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                              negated: F
                            )
                        )
                      ) (SQ <')$'>)
                    }
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                )
              ]
            )
            (command.ShAssignment
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                        (command_sub
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                          child: 
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                            )
                        )
                      )
                    }
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                )
              ]
            )
            (command.If
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                (if_arm
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                    (condition.Shell
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                            (command.DBracket
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                                (bool_expr.Binary
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                                        left_token: <Id.Left_DollarParen '$('>
                                        child: 
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                                              (C {<grep>} {(SQ <'^__uniqtype_[0-9a-f]{7,8}_'>)})
                                              (C {<wc>} {<-l>})
                                            ]
                                            negated: F
                                          )
                                      )
                                    }
                                  right: {<1>}
                                )
                            )
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                        )
                      ]
                    )
                  action: [
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                        {
                          (DQ <'Error: expected at most one matching uniqtype for '> 
                            (${ Id.VSub_Name big_regexp) <'; got '>
                          )
                        }
                        {($ Id.VSub_DollarName '$matches')}
                      ]
                      redirects: [
                        (redir
                          op: <Id.Redir_GreatAnd '1>&'>
                          loc: (redir_loc.Fd fd:1)
                          arg: {<2>}
                        )
                      ]
                      do_fork: T
                    )
                    (command.ControlFlow
                      token: <Id.ControlFlow_Exit exit>
                      arg_word: {<1>}
                    )
                  ]
                  spids: [197 232]
                )
              ]
            )
            (command.Pipeline
              children: [
                (C {<echo>} {(DQ ($ Id.VSub_DollarName '$matches'))})
                (C {<sed>} {(SQ <'/^$/ d'>)})
                (command.WhileUntil
                  keyword: <Id.KW_While while>
                  cond: 
                    (condition.Shell
                      commands: [
                        (command.Sentence
                          child: (C {<read>} {<matching_typesym>})
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  body: 
                    (command.DoGroup
                      children: [
                        (command.ShAssignment
                          pairs: [
                            (assign_pair
                              lhs: (sh_lhs_expr.Name name:matching_type)
                              op: assign_op.Equal
                              rhs: 
                                {
                                  (DQ 
                                    (command_sub
                                      left_token: <Id.Left_DollarParen '$('>
                                      child: 
                                        (command.Pipeline
                                          children: [
                                            (C {<echo>} 
                                              {(DQ ($ Id.VSub_DollarName '$matching_typesym'))}
                                            )
                                            (C {<sed>} {<-r>} 
                                              {(SQ <'s/^__uniqtype_([0-9a-f]{7,8})?_//'>)}
                                            )
                                          ]
                                          negated: F
                                        )
                                    )
                                  )
                                }
                              spids: [321]
                            )
                          ]
                        )
                        (command.Pipeline
                          children: [
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                            (C {<sed>} {(SQ <'s/, */\\n/g'>)})
                            (C {<tr>} {(SQ <' '>)} {(SQ <_>)})
                            (C {<grep>} {<-v>} {(DQ <'^'> (${ Id.VSub_Name matching_type)) (SQ <'$'>)})
                            (command.WhileUntil
                              keyword: <Id.KW_While while>
                              cond: 
                                (condition.Shell
                                  commands: [
                                    (command.Sentence
                                      child: (C {<read>} {<equiv>})
                                      terminator: <Id.Op_Semi _>
                                    )
                                  ]
                                )
                              body: 
                                (command.DoGroup
                                  children: [
                                    (command.ShAssignment
                                      pairs: [
                                        (assign_pair
                                          lhs: (sh_lhs_expr.Name name:synonym_typesym)
                                          op: assign_op.Equal
                                          rhs: 
                                            {
                                              (DQ 
                                                (command_sub
                                                  left_token: <Id.Left_DollarParen '$('>
                                                  child: 
                                                    (command.Pipeline
                                                      children: [
                                                        (C {<echo>} 
                                                          {
                                                            (DQ 
                                                              ($ Id.VSub_DollarName 
'$matching_typesym'
                                                              )
                                                            )
                                                          }
                                                        )
                                                        (C {<sed>} {<-r>} 
                                                          {
                                                            (DQ 
                                                              <
's/^(__uniqtype_([0-9a-f]{7,8})?_).*/'
                                                              > <Id.Lit_BadBackslash '\\'> <1> (${ Id.VSub_Name equiv) <'/'>
                                                            )
                                                          }
                                                        )
                                                      ]
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                                                )
                                              )
                                            }
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                                        )
                                      ]
                                    )
                                    (C {<echo>} 
                                      {<-Wl> <Id.Lit_Comma ','> <--defsym> <Id.Lit_Comma ','> 
                                        (${ Id.VSub_Name synonym_typesym) <Id.Lit_Equals '='> (${ Id.VSub_Name matching_typesym)
                                      }
                                    )
                                  ]
                                )
                            )
                          ]
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                        )
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                    )
                )
              ]
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            )
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        )
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          loc: (redir_loc.Fd fd:0)
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        )
      ]
    )
  ]
)