(List
  (FunctionDef main []
    (Com {[LIT_CHARS gcc]} {[LIT_CHARS -std] [LIT_DBRACKET_LIKE "="] [LIT_CHARS c99]} {[LIT_CHARS -o]} {[LIT_CHARS mark]} {[LIT_CHARS main.c]}    )
  )
  (Com {[DQ [VarSub @]]}  )
)