[snipe.git] / parse / l5.grm

(* L5 Compiler
 * L5 grammar
 * Author: Kaustuv Chaudhuri <kaustuv+@cs.cmu.edu>
 * Modified: Frank Pfenning <fp@cs.cmu.edu>
 * Modified: Joshua Wise <jwise@andrew.cmu.edu>
 * Modified: Chris Lu <czl@andrew.cmu.edu>
 *)

structure A = Ast
structure T = Type
structure AU = AstUtils
structure AUP = AstUtils.Program

(* for simplicity, we only mark expressions, not statements *)

(* mark e with region (left, right) in source file *)
fun mark (e, (left, right)) = A.Marked (Mark.mark' (e, ParseState.ext (left, right)))
fun markstm (e, (left, right)) = A.MarkedStm (Mark.mark' (e, ParseState.ext (left, right)))
fun markfunction (e, (left, right)) = A.MarkedFunction (Mark.mark' (e, ParseState.ext (left, right)))
fun marktypedef (e, (left, right)) = T.MarkedTypedef (Mark.mark' (e, ParseState.ext (left, right)))

(* create lval from expression; here just an id *)
(* generates error if not an identifier *)
fun make_lval (A.Var(id)) ext = id
  | make_lval (A.Marked(marked_exp)) ext =
      make_lval (Mark.data marked_exp) (Mark.ext marked_exp)
  | make_lval _ ext = ( ErrorMsg.error ext "not a variable" ;
			Symbol.bogus )

%%
%header (functor L5LrValsFn (structure Token : TOKEN))

%term 
   EOF
 | SEMI
 | INTNUM of Word32.word
 | IDENT of Symbol.symbol
 | RETURN
 | PLUS | MINUS | STAR | SLASH | PERCENT | LSH | RSH | LOGOR | LOGAND | BITAND | BITXOR | BITOR | BITNOT | BANG
 | ASSIGN | PLUSEQ | MINUSEQ | STAREQ | SLASHEQ | PERCENTEQ | LSHEQ | RSHEQ | BITANDEQ | BITXOREQ | BITOREQ
 | EQ | NEQ | LT | LE | GT | GE
 | IF | ELSE | WHILE | FOR | CONTINUE | BREAK
 | LBRACE | RBRACE
 | LPAREN | RPAREN
 | UNARY | ASNOP (* dummy *)
 | EXTERN | VAR | INT | QUESTION | COLON | COMMA | STRUCT | NULL | LBRACKET | RBRACKET | ARROW | DOT | NEW
 | PLUSPLUS | MINUSMINUS

%nonterm 
   program of A.program
 | programx of A.program
 | stms of A.stm list
 | stm of A.stm
 | simp of A.stm
 | return of A.stm
 | exp of A.exp
 | explist of A.exp list
 | control of A.stm
 | asnop of A.oper
 | block of A.stm list
 | simpoption of A.stm option
 | elseoption of A.stm list option
 | idents of A.ident list
 | vtype of T.vtype
 | decls of A.program
 | extdecl of A.ident * A.function
 | paramlist of T.variable list
 | param of T.variable
 | typedecl of T.ident * T.typedef
 | memberlist of (T.ident * T.vtype) list
 | member of (T.ident * T.vtype)
 | function of A.ident * A.function
 | vardecl of T.variable list
 | vardecls of T.variable list

%verbose                                (* print summary of errors *)
%pos int                                (* positions *)
%start program
%eop EOF
%noshift EOF

%name L5

%right QUESTION COLON
%left LOGOR
%left LOGAND
%left BITOR
%left BITXOR
%left BITAND
%left EQ NEQ
%left LT LE GT GE
%left LSH RSH
%left PLUS MINUS
%left STAR SLASH PERCENT
%right UNARY
%left LPAREN LBRACKET ARROW DOT

%%

program    : programx               (programx)

programx   : decls                  (decls)
           | programx function      (AUP.append_function programx function)

vtype      : INT                    (T.Int)
           | IDENT                  (T.Typedef IDENT)
           | vtype STAR             (T.Pointer vtype)
           | vtype LBRACKET RBRACKET
                                    (T.Array vtype)

decls      :                        (Symbol.empty, Symbol.empty)
           | typedecl decls         (AUP.append_typedef decls typedecl)
           | extdecl decls          (AUP.append_function decls extdecl)

extdecl    : EXTERN vtype IDENT LPAREN RPAREN SEMI
                                    (IDENT, markfunction (A.Extern (vtype, []), (EXTERNleft, SEMIright)))
           | EXTERN vtype IDENT LPAREN paramlist RPAREN SEMI
                                    (IDENT, markfunction (A.Extern (vtype, paramlist), (EXTERNleft, SEMIright)))

paramlist  : param COMMA paramlist  (param :: paramlist)
           | param                  ([param])

param      : IDENT COLON vtype      (IDENT, vtype)

typedecl   : STRUCT IDENT LBRACE RBRACE SEMI
                                    (IDENT, marktypedef (T.Struct ([]), (STRUCTleft, SEMIright)))
           | STRUCT IDENT LBRACE memberlist RBRACE SEMI
                                    (IDENT, marktypedef (T.Struct (memberlist), (STRUCTleft, SEMIright)))

memberlist : member memberlist      (member :: memberlist)
           | member                 ([member])

member     : IDENT COLON vtype SEMI (IDENT, vtype)

function   : vtype IDENT LPAREN paramlist RPAREN LBRACE vardecls stms RBRACE
                                    (IDENT, markfunction (A.Function (vtype, paramlist, vardecls, stms), (vtypeleft, RBRACEright)))
           | vtype IDENT LPAREN RPAREN LBRACE vardecls stms RBRACE
                                    (IDENT, markfunction (A.Function (vtype, [], vardecls, stms), (vtypeleft, RBRACEright)))

vardecls   :                        ([])
           | vardecl vardecls       (vardecl @ vardecls)

vardecl    : VAR idents COLON vtype SEMI
                                    (map (fn x => (x, vtype)) idents)

idents     : IDENT                  ([IDENT])
           | IDENT COMMA idents     (IDENT :: idents)

stms       :                        ([])
           | stm stms               (stm :: stms)

stm        : simp SEMI              (simp)
           | control                (control)
           | SEMI                   (A.Nop)

simp       : exp ASSIGN exp %prec ASNOP
                                    (A.Assign(exp1, exp2))
           | exp asnop exp %prec ASNOP
                                    (A.AsnOp(asnop, exp1, exp2))
           | exp PLUSPLUS %prec ASNOP
                                    (A.AsnOp(A.PLUS, exp, A.ConstExp(0w1)))
           | exp MINUSMINUS %prec ASNOP
                                    (A.AsnOp(A.MINUS, exp, A.ConstExp(0w1)))
           | exp                    (markstm (A.Effect (exp), (expleft, expright)))

control    : IF LPAREN exp RPAREN block elseoption
                                    (markstm ((A.If (exp, block, elseoption)), (IFleft, elseoptionright)))
           | WHILE LPAREN exp RPAREN block
                                    (markstm ((A.While (exp, block)), (WHILEleft, blockright)))
           | FOR LPAREN simpoption SEMI exp SEMI simpoption RPAREN block
                                    (markstm ((A.For (simpoption1, exp, simpoption2, block)), (FORleft, blockright)))
           | CONTINUE SEMI          (markstm ((A.Continue), (CONTINUEleft, SEMIright)))
           | BREAK SEMI             (markstm ((A.Break), (BREAKleft, SEMIright)))
           | RETURN exp SEMI        (markstm ((A.Return exp), (RETURNleft, SEMIright)))

elseoption : ELSE block             (SOME block)
           |                        (NONE)

simpoption :                        (NONE)
           | simp                   (SOME simp)

block      : stm                    ([stm])
           | LBRACE stms RBRACE     (stms)

exp        : LPAREN exp RPAREN      (exp)
           | INTNUM                 (mark (A.ConstExp(INTNUM),(INTNUMleft,INTNUMright)))
           | IDENT                  (mark (A.Var(IDENT), (IDENTleft,IDENTright)))
           | exp DOT IDENT          (mark (A.Member(exp, IDENT), (expleft, IDENTright)))
           | exp ARROW IDENT        (mark (A.DerefMember(exp, IDENT), (expleft, IDENTright)))
           | STAR exp %prec UNARY   (mark (A.Dereference(exp), (STARleft, expright)))
           | exp LBRACKET exp RBRACKET
                                    (mark (A.ArrIndex(exp1, exp2), (exp1left, exp2right)))
           | exp PLUS exp           (mark (A.OpExp (A.PLUS, [exp1,exp2]), (exp1left,exp2right)))
           | exp MINUS exp          (mark (A.OpExp (A.MINUS, [exp1,exp2]), (exp1left,exp2right)))
           | exp STAR exp           (mark (A.OpExp (A.TIMES, [exp1,exp2]), (exp1left,exp2right)))
           | exp SLASH exp          (mark (A.OpExp (A.DIVIDEDBY, [exp1,exp2]), (exp1left,exp2right)))
           | exp PERCENT exp        (mark (A.OpExp (A.MODULO, [exp1,exp2]), (exp1left,exp2right)))
           | exp LSH exp            (mark (A.OpExp (A.LSH, [exp1,exp2]), (exp1left,exp2right)))
           | exp RSH exp            (mark (A.OpExp (A.RSH, [exp1,exp2]), (exp1left,exp2right)))
           | exp LOGOR exp          (mark (A.OpExp (A.LOGOR, [exp1,exp2]), (exp1left,exp2right)))
           | exp LOGAND exp         (mark (A.OpExp (A.LOGAND, [exp1,exp2]), (exp1left,exp2right)))
           | exp BITOR exp          (mark (A.OpExp (A.BITOR, [exp1,exp2]), (exp1left,exp2right)))
           | exp BITAND exp         (mark (A.OpExp (A.BITAND, [exp1,exp2]), (exp1left,exp2right)))
           | exp BITXOR exp         (mark (A.OpExp (A.BITXOR, [exp1,exp2]), (exp1left,exp2right)))
           | exp EQ exp             (mark (A.OpExp (A.EQ, [exp1,exp2]), (exp1left,exp2right)))
           | exp NEQ exp            (mark (A.OpExp (A.NEQ, [exp1,exp2]), (exp1left,exp2right)))
           | exp LT exp             (mark (A.OpExp (A.LT, [exp1,exp2]), (exp1left,exp2right)))
           | exp LE exp             (mark (A.OpExp (A.LE, [exp1,exp2]), (exp1left,exp2right)))
           | exp GT exp             (mark (A.OpExp (A.GT, [exp1,exp2]), (exp1left,exp2right)))
           | exp GE exp             (mark (A.OpExp (A.GE, [exp1,exp2]), (exp1left,exp2right)))
           | NULL                   (mark (A.Null, (NULLleft, NULLright)))
           | IDENT LPAREN RPAREN    (mark (A.FuncCall(IDENT, []), (IDENTleft, RPARENright)))
           | IDENT LPAREN explist RPAREN
                                    (mark (A.FuncCall(IDENT, explist), (IDENTleft, RPARENright)))
           | NEW LPAREN vtype RPAREN
                                    (mark (A.New (vtype), (NEWleft, RPARENright)))
           | NEW LPAREN vtype LBRACKET exp RBRACKET RPAREN
                                    (mark (A.NewArr (vtype, exp), (NEWleft, RPARENright)))
           | MINUS exp %prec UNARY  (mark (A.OpExp (A.NEGATIVE, [exp]), (MINUSleft,expright)))
           | BITNOT exp %prec UNARY (mark (A.OpExp (A.BITNOT, [exp]), (BITNOTleft,expright)))
           | BANG exp %prec UNARY   (mark (A.OpExp (A.BANG, [exp]), (BANGleft,expright)))
           | exp QUESTION exp COLON exp
                                    (mark (A.Conditional (exp1, exp2, exp3), (exp1left, exp3right)))

explist    : exp                    ([exp])
           | exp COMMA explist      (exp :: explist)

asnop      : PLUSEQ                (A.PLUS)
           | MINUSEQ               (A.MINUS)
           | STAREQ                (A.TIMES)
           | SLASHEQ               (A.DIVIDEDBY)
           | PERCENTEQ             (A.MODULO)
           | LSHEQ                 (A.LSH)
           | RSHEQ                 (A.RSH)
           | BITOREQ               (A.BITOR)
           | BITANDEQ              (A.BITAND)
           | BITXOREQ              (A.BITXOR)
Commit	Line	Data
5c79bb68 JW	1	(* L5 Compiler
5c79bb68 JW	2	* L5 grammar
0a24e44d JW	3	* Author: Kaustuv Chaudhuri <kaustuv+@cs.cmu.edu>
	4	* Modified: Frank Pfenning <fp@cs.cmu.edu>
	5	* Modified: Joshua Wise <jwise@andrew.cmu.edu>
	6	* Modified: Chris Lu <czl@andrew.cmu.edu>
	7	*)
	8
	9	structure A = Ast
5c79bb68	10	structure T = Type
1144856b JW	11	structure AU = AstUtils
1144856b JW	12	structure AUP = AstUtils.Program
0a24e44d JW	13
	14	(* for simplicity, we only mark expressions, not statements *)
	15
	16	(* mark e with region (left, right) in source file *)
	17	fun mark (e, (left, right)) = A.Marked (Mark.mark' (e, ParseState.ext (left, right)))
	18	fun markstm (e, (left, right)) = A.MarkedStm (Mark.mark' (e, ParseState.ext (left, right)))
1144856b	19	fun markfunction (e, (left, right)) = A.MarkedFunction (Mark.mark' (e, ParseState.ext (left, right)))
5c79bb68	20	fun marktypedef (e, (left, right)) = T.MarkedTypedef (Mark.mark' (e, ParseState.ext (left, right)))
0a24e44d JW	21
	22	(* create lval from expression; here just an id *)
	23	(* generates error if not an identifier *)
	24	fun make_lval (A.Var(id)) ext = id
	25	\| make_lval (A.Marked(marked_exp)) ext =
	26	make_lval (Mark.data marked_exp) (Mark.ext marked_exp)
	27	\| make_lval _ ext = ( ErrorMsg.error ext "not a variable" ;
	28	Symbol.bogus )
	29
0a24e44d	30	%%
5c79bb68	31	%header (functor L5LrValsFn (structure Token : TOKEN))
0a24e44d JW	32
	33	%term
	34	EOF
	35	\| SEMI
	36	\| INTNUM of Word32.word
	37	\| IDENT of Symbol.symbol
	38	\| RETURN
	39	\| PLUS \| MINUS \| STAR \| SLASH \| PERCENT \| LSH \| RSH \| LOGOR \| LOGAND \| BITAND \| BITXOR \| BITOR \| BITNOT \| BANG
	40	\| ASSIGN \| PLUSEQ \| MINUSEQ \| STAREQ \| SLASHEQ \| PERCENTEQ \| LSHEQ \| RSHEQ \| BITANDEQ \| BITXOREQ \| BITOREQ
	41	\| EQ \| NEQ \| LT \| LE \| GT \| GE
	42	\| IF \| ELSE \| WHILE \| FOR \| CONTINUE \| BREAK
	43	\| LBRACE \| RBRACE
	44	\| LPAREN \| RPAREN
	45	\| UNARY \| ASNOP (* dummy *)
5c79bb68 JW	46	\| EXTERN \| VAR \| INT \| QUESTION \| COLON \| COMMA \| STRUCT \| NULL \| LBRACKET \| RBRACKET \| ARROW \| DOT \| NEW
5c79bb68 JW	47	\| PLUSPLUS \| MINUSMINUS
0a24e44d JW	48
	49	%nonterm
	50	program of A.program
1144856b	51	\| programx of A.program
0a24e44d JW	52	\| stms of A.stm list
	53	\| stm of A.stm
	54	\| simp of A.stm
	55	\| return of A.stm
	56	\| exp of A.exp
6ade8b0a	57	\| explist of A.exp list
0a24e44d	58	\| control of A.stm
1144856b	59	\| asnop of A.oper
0a24e44d JW	60	\| block of A.stm list
	61	\| simpoption of A.stm option
	62	\| elseoption of A.stm list option
6ade8b0a	63	\| idents of A.ident list
5c79bb68	64	\| vtype of T.vtype
1144856b JW	65	\| decls of A.program
1144856b JW	66	\| extdecl of A.ident * A.function
5c79bb68 JW	67	\| paramlist of T.variable list
	68	\| param of T.variable
	69	\| typedecl of T.ident * T.typedef
	70	\| memberlist of (T.ident * T.vtype) list
	71	\| member of (T.ident * T.vtype)
1144856b	72	\| function of A.ident * A.function
5c79bb68 JW	73	\| vardecl of T.variable list
5c79bb68 JW	74	\| vardecls of T.variable list
0a24e44d JW	75
	76	%verbose (* print summary of errors *)
	77	%pos int (* positions *)
	78	%start program
	79	%eop EOF
	80	%noshift EOF
	81
5c79bb68	82	%name L5
0a24e44d	83
5c79bb68	84	%right QUESTION COLON
0a24e44d JW	85	%left LOGOR
	86	%left LOGAND
	87	%left BITOR
	88	%left BITXOR
	89	%left BITAND
	90	%left EQ NEQ
	91	%left LT LE GT GE
	92	%left LSH RSH
	93	%left PLUS MINUS
	94	%left STAR SLASH PERCENT
	95	%right UNARY
1144856b	96	%left LPAREN LBRACKET ARROW DOT
0a24e44d JW	97
	98	%%
	99
1144856b JW	100	program : programx (programx)
	101
	102	programx : decls (decls)
	103	\| programx function (AUP.append_function programx function)
6ade8b0a	104
5c79bb68 JW	105	vtype : INT (T.Int)
	106	\| IDENT (T.Typedef IDENT)
	107	\| vtype STAR (T.Pointer vtype)
1144856b	108	\| vtype LBRACKET RBRACKET
5c79bb68	109	(T.Array vtype)
6ade8b0a	110
1144856b JW	111	decls : (Symbol.empty, Symbol.empty)
	112	\| typedecl decls (AUP.append_typedef decls typedecl)
	113	\| extdecl decls (AUP.append_function decls extdecl)
6ade8b0a JW	114
6ade8b0a JW	115	extdecl : EXTERN vtype IDENT LPAREN RPAREN SEMI
1144856b	116	(IDENT, markfunction (A.Extern (vtype, []), (EXTERNleft, SEMIright)))
6ade8b0a	117	\| EXTERN vtype IDENT LPAREN paramlist RPAREN SEMI
1144856b	118	(IDENT, markfunction (A.Extern (vtype, paramlist), (EXTERNleft, SEMIright)))
6ade8b0a JW	119
	120	paramlist : param COMMA paramlist (param :: paramlist)
	121	\| param ([param])
	122
	123	param : IDENT COLON vtype (IDENT, vtype)
	124
1144856b	125	typedecl : STRUCT IDENT LBRACE RBRACE SEMI
5c79bb68	126	(IDENT, marktypedef (T.Struct ([]), (STRUCTleft, SEMIright)))
1144856b	127	\| STRUCT IDENT LBRACE memberlist RBRACE SEMI
5c79bb68	128	(IDENT, marktypedef (T.Struct (memberlist), (STRUCTleft, SEMIright)))
1144856b JW	129
	130	memberlist : member memberlist (member :: memberlist)
	131	\| member ([member])
	132
	133	member : IDENT COLON vtype SEMI (IDENT, vtype)
6ade8b0a	134
1144856b JW	135	function : vtype IDENT LPAREN paramlist RPAREN LBRACE vardecls stms RBRACE
	136	(IDENT, markfunction (A.Function (vtype, paramlist, vardecls, stms), (vtypeleft, RBRACEright)))
	137	\| vtype IDENT LPAREN RPAREN LBRACE vardecls stms RBRACE
	138	(IDENT, markfunction (A.Function (vtype, [], vardecls, stms), (vtypeleft, RBRACEright)))
6ade8b0a JW	139
	140	vardecls : ([])
	141	\| vardecl vardecls (vardecl @ vardecls)
	142
	143	vardecl : VAR idents COLON vtype SEMI
	144	(map (fn x => (x, vtype)) idents)
	145
	146	idents : IDENT ([IDENT])
	147	\| IDENT COMMA idents (IDENT :: idents)
0a24e44d JW	148
	149	stms : ([])
	150	\| stm stms (stm :: stms)
	151
6ade8b0a JW	152	stm : simp SEMI (simp)
	153	\| control (control)
	154	\| SEMI (A.Nop)
0a24e44d	155
1144856b JW	156	simp : exp ASSIGN exp %prec ASNOP
	157	(A.Assign(exp1, exp2))
	158	\| exp asnop exp %prec ASNOP
	159	(A.AsnOp(asnop, exp1, exp2))
5c79bb68 JW	160	\| exp PLUSPLUS %prec ASNOP
	161	(A.AsnOp(A.PLUS, exp, A.ConstExp(0w1)))
	162	\| exp MINUSMINUS %prec ASNOP
	163	(A.AsnOp(A.MINUS, exp, A.ConstExp(0w1)))
1144856b	164	\| exp (markstm (A.Effect (exp), (expleft, expright)))
0a24e44d JW	165
	166	control : IF LPAREN exp RPAREN block elseoption
	167	(markstm ((A.If (exp, block, elseoption)), (IFleft, elseoptionright)))
	168	\| WHILE LPAREN exp RPAREN block
	169	(markstm ((A.While (exp, block)), (WHILEleft, blockright)))
	170	\| FOR LPAREN simpoption SEMI exp SEMI simpoption RPAREN block
	171	(markstm ((A.For (simpoption1, exp, simpoption2, block)), (FORleft, blockright)))
	172	\| CONTINUE SEMI (markstm ((A.Continue), (CONTINUEleft, SEMIright)))
	173	\| BREAK SEMI (markstm ((A.Break), (BREAKleft, SEMIright)))
	174	\| RETURN exp SEMI (markstm ((A.Return exp), (RETURNleft, SEMIright)))
	175
	176	elseoption : ELSE block (SOME block)
	177	\| (NONE)
	178
	179	simpoption : (NONE)
	180	\| simp (SOME simp)
	181
	182	block : stm ([stm])
	183	\| LBRACE stms RBRACE (stms)
	184
	185	exp : LPAREN exp RPAREN (exp)
	186	\| INTNUM (mark (A.ConstExp(INTNUM),(INTNUMleft,INTNUMright)))
	187	\| IDENT (mark (A.Var(IDENT), (IDENTleft,IDENTright)))
1144856b JW	188	\| exp DOT IDENT (mark (A.Member(exp, IDENT), (expleft, IDENTright)))
	189	\| exp ARROW IDENT (mark (A.DerefMember(exp, IDENT), (expleft, IDENTright)))
	190	\| STAR exp %prec UNARY (mark (A.Dereference(exp), (STARleft, expright)))
	191	\| exp LBRACKET exp RBRACKET
	192	(mark (A.ArrIndex(exp1, exp2), (exp1left, exp2right)))
0a24e44d JW	193	\| exp PLUS exp (mark (A.OpExp (A.PLUS, [exp1,exp2]), (exp1left,exp2right)))
	194	\| exp MINUS exp (mark (A.OpExp (A.MINUS, [exp1,exp2]), (exp1left,exp2right)))
	195	\| exp STAR exp (mark (A.OpExp (A.TIMES, [exp1,exp2]), (exp1left,exp2right)))
	196	\| exp SLASH exp (mark (A.OpExp (A.DIVIDEDBY, [exp1,exp2]), (exp1left,exp2right)))
	197	\| exp PERCENT exp (mark (A.OpExp (A.MODULO, [exp1,exp2]), (exp1left,exp2right)))
	198	\| exp LSH exp (mark (A.OpExp (A.LSH, [exp1,exp2]), (exp1left,exp2right)))
	199	\| exp RSH exp (mark (A.OpExp (A.RSH, [exp1,exp2]), (exp1left,exp2right)))
	200	\| exp LOGOR exp (mark (A.OpExp (A.LOGOR, [exp1,exp2]), (exp1left,exp2right)))
	201	\| exp LOGAND exp (mark (A.OpExp (A.LOGAND, [exp1,exp2]), (exp1left,exp2right)))
	202	\| exp BITOR exp (mark (A.OpExp (A.BITOR, [exp1,exp2]), (exp1left,exp2right)))
	203	\| exp BITAND exp (mark (A.OpExp (A.BITAND, [exp1,exp2]), (exp1left,exp2right)))
	204	\| exp BITXOR exp (mark (A.OpExp (A.BITXOR, [exp1,exp2]), (exp1left,exp2right)))
	205	\| exp EQ exp (mark (A.OpExp (A.EQ, [exp1,exp2]), (exp1left,exp2right)))
	206	\| exp NEQ exp (mark (A.OpExp (A.NEQ, [exp1,exp2]), (exp1left,exp2right)))
	207	\| exp LT exp (mark (A.OpExp (A.LT, [exp1,exp2]), (exp1left,exp2right)))
	208	\| exp LE exp (mark (A.OpExp (A.LE, [exp1,exp2]), (exp1left,exp2right)))
	209	\| exp GT exp (mark (A.OpExp (A.GT, [exp1,exp2]), (exp1left,exp2right)))
	210	\| exp GE exp (mark (A.OpExp (A.GE, [exp1,exp2]), (exp1left,exp2right)))
1144856b	211	\| NULL (mark (A.Null, (NULLleft, NULLright)))
6ade8b0a	212	\| IDENT LPAREN RPAREN (mark (A.FuncCall(IDENT, []), (IDENTleft, RPARENright)))
6ade8b0a JW	213	\| IDENT LPAREN explist RPAREN
6ade8b0a JW	214	(mark (A.FuncCall(IDENT, explist), (IDENTleft, RPARENright)))
1144856b JW	215	\| NEW LPAREN vtype RPAREN
	216	(mark (A.New (vtype), (NEWleft, RPARENright)))
	217	\| NEW LPAREN vtype LBRACKET exp RBRACKET RPAREN
	218	(mark (A.NewArr (vtype, exp), (NEWleft, RPARENright)))
0a24e44d JW	219	\| MINUS exp %prec UNARY (mark (A.OpExp (A.NEGATIVE, [exp]), (MINUSleft,expright)))
	220	\| BITNOT exp %prec UNARY (mark (A.OpExp (A.BITNOT, [exp]), (BITNOTleft,expright)))
	221	\| BANG exp %prec UNARY (mark (A.OpExp (A.BANG, [exp]), (BANGleft,expright)))
5c79bb68 JW	222	\| exp QUESTION exp COLON exp
5c79bb68 JW	223	(mark (A.Conditional (exp1, exp2, exp3), (exp1left, exp3right)))
0a24e44d	224
6ade8b0a JW	225	explist : exp ([exp])
	226	\| exp COMMA explist (exp :: explist)
	227
1144856b JW	228	asnop : PLUSEQ (A.PLUS)
	229	\| MINUSEQ (A.MINUS)
	230	\| STAREQ (A.TIMES)
	231	\| SLASHEQ (A.DIVIDEDBY)
	232	\| PERCENTEQ (A.MODULO)
	233	\| LSHEQ (A.LSH)
	234	\| RSHEQ (A.RSH)
	235	\| BITOREQ (A.BITOR)
	236	\| BITANDEQ (A.BITAND)
	237	\| BITXOREQ (A.BITXOR)