SWhile exp stm -> prPrec i 0 (concatD [doc (showString "while") , doc (showString "(") , prt 0 exp , doc (showString ")") , prt 0 stm])
SIf exp stm0 stm -> prPrec i 0 (concatD [doc (showString "if") , doc (showString "(") , prt 0 exp , doc (showString ")") , prt 0 stm0 , doc (showString "else") , prt 0 stm])
SPrint exp -> prPrec i 0 (concatD [doc (showString "print") , prt 0 exp , doc (showString ";")])
SNoop -> prPrec i 0 (concatD [])
SWhile exp stm -> prPrec i 0 (concatD [doc (showString "while") , doc (showString "(") , prt 0 exp , doc (showString ")") , prt 0 stm])
SIf exp stm0 stm -> prPrec i 0 (concatD [doc (showString "if") , doc (showString "(") , prt 0 exp , doc (showString ")") , prt 0 stm0 , doc (showString "else") , prt 0 stm])
SPrint exp -> prPrec i 0 (concatD [doc (showString "print") , prt 0 exp , doc (showString ";")])
SNoop -> prPrec i 0 (concatD [])