(command.CommandList
  children: [
    (command.AndOr
      ops: [Op_DAmp]
      children: [
        (C {(Lit_LBracket '[')} {($ VSub_Pound '$#')} {(-eq)} {(1)} {(Lit_RBracket ']')})
        (command.ShAssignment
          pairs: [
            (assign_pair
              lhs: (sh_lhs_expr.Name name:re)
              op: Equal
              rhs: {(DQ ($ VSub_Number '$1') ('([^0-9]|') (Lit_Other '$') (')'))}
            )
          ]
        )
      ]
    )
    (command.Pipeline
      children: [
        (C {(echo)} {(DQ ('#include <errno.h>'))})
        (C {(cpp)} {(-dD)} {(-CC)})
        (C {(grep)} {(-E)} {(DQ ('^#define E[^ ]+ ') ($ VSub_DollarName '$re'))})
        (C {(sed)} {(SQ <':s;s#/\\*\\([^ ]*\\) #/*\\1_#;t s;'>)})
        (C {(column)} {(-t)})
        (C {(tr)} {(_)} {(SQ <' '>)})
        (C {(cut)} 
          {(-c1-) 
            (command_sub
              left_token: <Left_DollarParen '$('>
              command_list: (command.CommandList children:[(C {(tput)} {(cols)})])
            )
          }
        )
      ]
      negated: F
    )
  ]
)