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[smlnj] View of /sml/releases/release-110.30/ckit/src/parser/grammar/c.grm
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View of /sml/releases/release-110.30/ckit/src/parser/grammar/c.grm

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Revision 663 - (download) (annotate)
Fri Jun 16 02:58:05 2000 UTC (19 years, 6 months ago) by nch
Original Path: sml/trunk/ckit/src/parser/grammar/c.grm
File size: 37451 byte(s)
Fixed comma-question bug (from Olivier Tardieu).

question colon case was:
   expr QUESTION expr COLON expr

and should be:
   expr QUESTION exprWComma COLON expr

Full code of fix:

 expr QUESTION exprWComma COLON expr %prec QUESTION (markExpression srcMap
(QuestionColon(expr1,exprWComma1,expr2),expr1left,expr2right))
(* DO NOT CHANGE THIS FILE -- this file was generated from cd.grm *)

(* Copyright (c) 1998 by Lucent Technologies *)

(* new comments from Satish Chandra, 6/21/99 *)
(* Overriding design approach: 
 *
 * Accept all legal programs, but possibly some illegal ones at this stage. 
 * Do not attempt to make a really tight grammar. Our tools are supposed to
 * work on "correct" C programs (i.e. those that cc -ansi would compile without
 * warnings). Of course, a type checker on the parse tree can report some errors
 * as syntax errors.
 *
 * Note on MARK:
 *
 * externalDecl, statement, and expression are the non-terms that are marked.
 * Compound statements are not separately marked.
 * declarations eventually become either a statement or a externalDecl
 *   if they are outside any function. They are marked accordingly.
 *
 * Note on function definitions:
 *
 * The order of the paramaters will always come from the FuncDecr.
 * The types of the parameter may come from the second declaration list  
 * (in K&R style)
 *
 * Note on the structure of the grammar:
 *
 * It is difficult to write a LALR(1) grammar based on the grammar given at
 * the back of the K&R book. The basic difficulty is that both TYPE_NAME and
 * ID are tokens that are strings, but it depends on the context whether
 * a given string is to be treated as an ID or a TYPE_NAME.
 * We have borrowed the solution used in GCC's parser specification. In this
 * scheme, the lexer always return the token TYPE_NAME if a name has been 
 * defined as a type name (via a typedef) in an applicable scope. The grammar 
 * productions are heavily rearranged (from K&R's grammar) to do the right 
 * thing. In this rearrangement, the basic idea is that a TYPE_NAME is  
 * allowed to appear in a declaration as a plain identifier only after a type 
 * specifier has previously appeared in the declaration. Also, a TYPE_NAME may 
 * appear only once in a declaration as a type specifier.
 *)

(* old comments below *)
(* Shortcomings *)
(* 1. No floating-point whatsoever *)

(* Notes on MARK:
 * externalDecl and statement are the non-terms that are marked.
 * Compound statements are not separately marked.
 * expressions are not marked at all.
 * declarations eventually become either a statement or a externalDecl
 *   if they are outside any function. they are marked accordingly.
 *)
 
(* Overriding theme: accept all legal programs, but also some illegal ones at this
 * stage. Do not attempt to make a really tight grammar. Our tools are supposed to
 * work on "correct" C programs (i.e. those that cc -ansi would compile without
 * warnings). Of course, a type checker on the parse tree can report some errors
 * as syntax errors.
 *)

(* About function definitions:
 * The order of the paramaters will always come from the FuncDecr thing 
 * The types of the parameter may come from the second declaration list  (in K&R style)
 *)

open ParseTree (* PortingHelp *)

fun markExternalDecl srcMap (d,left,right) = 
    MARKexternalDecl(SourceMap.location srcMap (left,right), d)

fun markDeclaration srcMap (d,left,right) = 
    MARKdeclaration(SourceMap.location srcMap (left,right), d)

fun markDeclarator srcMap (d,left,right) = 
    MARKdeclarator(SourceMap.location srcMap (left,right), d)

fun markStatement srcMap (s,left,right) = 
    MARKstatement(SourceMap.location srcMap (left, right), s)

fun markExpression srcMap (s,left,right) = 
    MARKexpression(SourceMap.location srcMap (left, right), s)

val unknown = {storage=[],qualifiers=[],specifiers=[]}:decltype

(* this code duplicated in BuildAst in function processDeclarator *)
fun ctypeDecrToTypeName (typ as {qualifiers, specifiers},decr) =
      let fun mkTyp spc = {qualifiers=[], specifiers=[spc]}
	  fun addQual q = {qualifiers=q::qualifiers, specifiers=specifiers}
       in case decr
	    of VarDecr x => (typ,SOME x)
	     | PointerDecr x =>
		ctypeDecrToTypeName (mkTyp (Pointer typ),x)
	     | ArrayDecr (x,sz) =>
		ctypeDecrToTypeName (mkTyp (Array (sz,typ)),x)
	     | FuncDecr (x,lst) =>
		ctypeDecrToTypeName (mkTyp (Function{retType=typ,params=lst}),x)
	     | QualDecr (q,decr) =>
		ctypeDecrToTypeName (addQual q, decr)
	     | EmptyDecr => (typ, NONE)
	     | EllipsesDecr => (mkTyp Ellipses, SOME("**ellipses**"))
	     | DecrExt _ => (typ, NONE)  (* should call decr extension? *)
	     | MARKdeclarator(loc, decr) => ctypeDecrToTypeName(typ, decr)
      end

fun dclr2str dcl = 
  (case ctypeDecrToTypeName ({qualifiers=[],specifiers=[]}, dcl)
     of (_,SOME s) => s
      | (_,NONE) => "")

fun combineDecltypes ( {qualifiers=q1,storage=st1,specifiers=sp1}
	           , {qualifiers=q2,storage=st2,specifiers=sp2}
	           ) =
  {qualifiers=q1@q2,storage=st1@st2,specifiers=sp1@sp2}  (* @ ok *)

fun applyPointer (PointerDecr x,rest) = PointerDecr (applyPointer (x,rest))
  | applyPointer (QualDecr (q,x),rest) = QualDecr (q, applyPointer (x,rest))
  | applyPointer (EmptyDecr, rest) = rest
  | applyPointer (_, rest) = rest  
    (* NCH/DBM[6/14/99]: this case can never occur  *)

fun addStorage(st, {qualifiers,storage,specifiers}) =
        {qualifiers=qualifiers,storage=st::storage,specifiers=specifiers}

fun addQualifiers(qs, {qualifiers,storage,specifiers}) =
	{qualifiers=qs@qualifiers,storage=storage,specifiers=specifiers} (* @ ok *)

fun addQualifier(q, {qualifiers,storage,specifiers}) =
	{qualifiers=q::qualifiers,storage=storage,specifiers=specifiers}

fun addSpecifier(sp, {qualifiers,storage,specifiers}) =
	{qualifiers=qualifiers,storage=storage,specifiers=sp::specifiers}

val addAll = combineDecltypes

fun loopQd (q::rst, acc) = loopQd(rst, QualDecr(q, acc))
  | loopQd (nil, acc) = acc

fun mkCtype typ = typ

(* DBM: major kludge, using TYPEDEF as storage class *)
fun insertDeclNames ({storage,...}: decltype, idl) =
    case storage
      of [TYPEDEF] =>  List.app (fn x as (dcl,_) => TypeDefs.addTdef (dclr2str dcl)) idl
       | _ => List.app (fn x as (dcl,_) => TypeDefs.addNoTdef (dclr2str dcl)) idl

fun insertFuncName dcl =
  let
    val name = dclr2str dcl
  in
    TypeDefs.addNoTdef name
  end

fun insertFuncParams (FuncDecr (_,params)) : unit = 
     let
       fun getName (ct, dclr) = dclr2str dclr
       val names = map getName params
     in
       List.app TypeDefs.addNoTdef names
     end
  | insertFuncParams (ArrayDecr(dcl,_)) = insertFuncParams dcl
  | insertFuncParams (PointerDecr dcl) = insertFuncParams dcl
  | insertFuncParams _ = ()  (* this is actually an error, but it will be caught in
		              * BuildAst when processing a PT.FunctionDef *)

abstype 'a seq = SEQ of 'a list
with val emptySeq = SEQ nil
     fun singletonSeq x = SEQ[x]
     fun addToSeq(x, SEQ yl) = SEQ(x :: yl)  (* add to end of sequence! *)
  (* fun addListToEnd(xl, yl) = SEQ((List.rev xl) @ yl) *)
     fun addOptToEnd(NONE, yl) = yl
       | addOptToEnd(SOME x, SEQ yl) = SEQ(x :: yl)
     fun seqToList(SEQ yl) = List.rev yl
end

%%

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

%term 
 	  EOF 
	| COLON | SEMICOLON | LPAREN | RPAREN | LCURLY | RCURLY 
	| LBRACE | RBRACE | DOT 
	| COMMA | QUESTION | PERCENT | AMP | BAR | TILDE | DIVIDE | PLUS
	| MINUS | HAT | BANG | TIMES
	| INC | DEC | ARROW
	| ID of string  
	| EQUALS | PLUSEQUALS | MINUSEQUALS | XOREQUALS | MODEQUALS 
	| TIMESEQUALS | DIVEQUALS | OREQUALS  | ANDEQUALS | LSHIFTEQUALS 
	| RSHIFTEQUALS
	| LTE | GTE | LT | GT | EQ | NEQ | OR | AND | LSHIFT | RSHIFT
	| DECNUM of LargeInt.int
        | REALNUM of real 
	| STRING of string 
	| CCONST of LargeInt.int
	| EXTERN | AUTO | STATIC | REGISTER | CONST | VOLATILE
	| IF | THEN | ELSE
	| FOR | DO |  SWITCH | CASE | DEFAULT
	| WHILE | RETURN 
	| BREAK | CONTINUE | GOTO
	| CHAR | DOUBLE | ENUM | FLOAT | INT | LONG | SHORT
        | FRACTIONAL | SATURATE                                (* D *)
	| STRUCT | UNION | UNSIGNED | SIGNED
	| VOID | SIZEOF | TYPEDEF | UNARY
	| ELIPSIS
	| TYPE_NAME of string

%nonterm 
	translationUnit of externalDecl list
	| tu of externalDecl seq
	| statement of statement
	| ostatementlist of statement list

	| statementlist of statement seq
	| compoundStatement of statement
	| expr of expression
	| opExpr of expression
	| exprWComma of expression
	| unaryOperator of operator
	| argumentExprList of expression seq
	| trailingComma of bool
	| enumeratorList of (string * expression) seq
	| enumerator of (string * expression)
	| abstractDeclarator of declarator
	| directAbstractDeclarator of declarator
	| initDeclarator of (declarator * expression)
	| notypeInitDeclarator of (declarator * expression)
	| initDeclaratorList of (declarator * expression) seq
	| notypeInitDeclaratorList of (declarator * expression) seq
	| pointer of declarator
	| declarator of declarator
        | aftertypeDeclarator of declarator
        | notypeDeclarator of declarator
        | parmDeclarator of declarator
	| aftertypeDirectDeclarator of declarator
	| notypeDirectDeclarator of declarator
        | parmDirectDeclarator of declarator
	| declarationSpecifiers of decltype 
	| declarationModifiers of decltype
        | reservedDeclarationSpecifier of decltype
        | specifierQualifierReserved of ctype
	| reservedSpecifierQualifiers of ctype
	| initializer of expression
	| initializerList of expression seq
	| storageClassSpecifier of storage
	| typeName of ctype
	| typeSpecifier of specifier
        | typeSpecifierReserved of specifier
	| typeQualifier of qualifier
        | typeQualifierList of qualifier list
	| specifierQualifierList of ctype
	| enumSpecifier of specifier
	| structOrUnionSpecifier of specifier
	| fDefDeclaration of (decltype * declarator)
	| declarationList of declaration seq
	| identlist of (string * int * int) seq
	| functionDefinition of externalDecl
	| declaration of declaration
	| declaration1 of declaration
	| externalDeclaration of externalDecl option
	| parameterList of (decltype * declarator) seq
	| parameterTypeList of (decltype * declarator) list
	| parameterDeclaration of (decltype * declarator)
	| structOrUnion of bool
	| structDeclarator of (declarator * expression)
	| notypeStructDeclarator of (declarator * expression)
	| structDeclaratorList of (declarator * expression) seq
	| notypeStructDeclaratorList of (declarator * expression) seq
	| structDeclarationList of (ctype * (declarator * expression) list) seq
	| structDeclaration of (ctype * (declarator * expression) list)
	| pushScope of unit
        | popScope of unit
        | strings of string





%pos int
%verbose
%pure
%start translationUnit
%eop EOF 
%noshift EOF
%keyword QUESTION IF THEN ELSE FOR DO SWITCH CASE DEFAULT WHILE RETURN BREAK CONTINUE GOTO
%subst TYPE_NAME for ID
%value TYPE_NAME(Error.hint "Likely cause: missing typedef declaration.\n"; "bogus")

%arg (srcMap) : SourceMap.sourcemap

%name C

%left COMMA
%right EQUALS PLUSEQUALS MINUSEQUALS TIMESEQUALS DIVEQUALS MODEQUALS XOREQUALS OREQUALS ANDEQUALS LSHIFTEQUALS RSHIFTEQUALS
%right QUESTION
%left OR
%left AND
%left BAR
%left HAT
%left AMP
%left EQ NEQ
%left LT GT LTE GTE
%left LSHIFT RSHIFT
%left PLUS MINUS
%left TIMES DIVIDE PERCENT
%right UNARY
%right INC DEC SIZEOF
%left LBRACE LPAREN ARROW DOT

%%

translationUnit:  
	tu			(seqToList tu)

tu:
					(emptySeq)
	| tu externalDeclaration	(addOptToEnd(externalDeclaration, tu))

externalDeclaration:
	  declaration			(SOME(markExternalDecl srcMap (ExternalDecl declaration,
						                       declarationleft,
								       declarationright)))
	| SEMICOLON			(NONE)
	| functionDefinition		(SOME(markExternalDecl srcMap (functionDefinition,
						   	               functionDefinitionleft,
							               functionDefinitionright)))

statement:
	FOR LPAREN opExpr SEMICOLON opExpr SEMICOLON opExpr RPAREN statement
					(markStatement srcMap (For(opExpr1,opExpr2,opExpr3,statement),
							FORleft, statementright))
	| WHILE LPAREN exprWComma RPAREN statement
					(markStatement srcMap (While(exprWComma,statement),
							WHILEleft, statementright))
	| SWITCH LPAREN exprWComma RPAREN statement
					(markStatement srcMap (Switch(exprWComma,statement),
							SWITCHleft, statementright))
	| DO statement WHILE LPAREN exprWComma RPAREN SEMICOLON
					(markStatement srcMap (Do(exprWComma,statement),
							DOleft, SEMICOLONright))
	| BREAK SEMICOLON		(markStatement srcMap (Break, 
							BREAKleft, SEMICOLONright))
	| CONTINUE SEMICOLON		(markStatement srcMap (Continue, 
							CONTINUEleft, SEMICOLONright))
	| RETURN opExpr SEMICOLON	(markStatement srcMap (Return(opExpr), 
							RETURNleft, SEMICOLONright))
	| GOTO ID SEMICOLON		(markStatement srcMap (Goto(ID), 
							GOTOleft, SEMICOLONright))
	| compoundStatement		(compoundStatement)
	| ID COLON statement		(markStatement srcMap (Labeled(ID,statement),
							IDleft,statementright))
	| DEFAULT COLON statement	(markStatement srcMap (DefaultLabel(statement),
							DEFAULTleft, statementright))
	| CASE exprWComma COLON statement		
					(markStatement srcMap (CaseLabel(exprWComma,statement),
							CASEleft, statementright))
	| IF LPAREN exprWComma RPAREN statement
					(markStatement srcMap (IfThen(exprWComma,statement),
							IFleft, statementright))
	| IF LPAREN exprWComma RPAREN statement ELSE statement
					(markStatement srcMap (IfThenElse(exprWComma,statement1,statement2),
							IFleft,
							statement2right))
        | exprWComma SEMICOLON	(markStatement srcMap (Expr(exprWComma),
							exprWCommaleft, SEMICOLONright))
	| SEMICOLON		        (markStatement srcMap (Expr(EmptyExpr),
							SEMICOLONleft, SEMICOLONright))






declaration:
          declaration1 SEMICOLON        (declaration1)


declaration1:
	  declarationSpecifiers
		(insertDeclNames (declarationSpecifiers, []);
		 markDeclaration srcMap
		   (Declaration(declarationSpecifiers, []), 
		    declarationSpecifiersleft, declarationSpecifiersright))

	| declarationSpecifiers initDeclaratorList
	        (let val decl = (declarationSpecifiers, seqToList initDeclaratorList)
		  in insertDeclNames decl;
		     markDeclaration srcMap
		       (Declaration decl, declarationSpecifiersleft, initDeclaratorListright)
	         end)

        | declarationModifiers notypeInitDeclaratorList
	        (let val decl = (declarationModifiers, seqToList notypeInitDeclaratorList)
		  in insertDeclNames decl;
		     markDeclaration srcMap
		       (Declaration decl, declarationModifiersleft, notypeInitDeclaratorListright)
	         end)

ostatementlist:	 
	statementlist 			(seqToList statementlist)
	| 				([])

statementlist:
	statement			(singletonSeq statement)
	| statementlist statement	(addToSeq(statement, statementlist))


(* original code: changed for "let" statements in D *)
compoundStatement: 
	  LCURLY pushScope declarationList ostatementlist popScope RCURLY
					(markStatement srcMap (Compound ((map Decl (seqToList declarationList)) @ ostatementlist), LCURLYleft, RCURLYright))
	| LCURLY ostatementlist RCURLY
 					(markStatement srcMap (Compound (ostatementlist), LCURLYleft, RCURLYright))
(* *)





unaryOperator: 
	AMP	(AddrOf)
	| TIMES (Star)
	| PLUS  (Uplus)
	| MINUS (Negate)
	| TILDE (BitNot)
	| BANG  (Not)

expr:
	expr QUESTION exprWComma COLON expr %prec QUESTION (markExpression srcMap (QuestionColon(expr1,exprWComma1,expr2),expr1left,expr2right))
        | expr PLUSEQUALS expr  	(markExpression srcMap (Binop(PlusAssign,expr1,expr2),expr1left,expr2right))
        | expr MINUSEQUALS expr		(markExpression srcMap (Binop(MinusAssign,expr1,expr2),expr1left,expr2right))
        | expr TIMESEQUALS expr		(markExpression srcMap (Binop(TimesAssign,expr1,expr2),expr1left,expr2right))
        | expr DIVEQUALS expr		(markExpression srcMap (Binop(DivAssign,expr1,expr2),expr1left,expr2right))
        | expr MODEQUALS expr		(markExpression srcMap (Binop(ModAssign,expr1,expr2),expr1left,expr2right))
        | expr XOREQUALS expr		(markExpression srcMap (Binop(XorAssign,expr1,expr2),expr1left,expr2right))
        | expr OREQUALS expr		(markExpression srcMap (Binop(OrAssign,expr1,expr2),expr1left,expr2right))
        | expr ANDEQUALS expr		(markExpression srcMap (Binop(AndAssign,expr1,expr2),expr1left,expr2right))
        | expr LSHIFTEQUALS expr	(markExpression srcMap (Binop(LshiftAssign,expr1,expr2),expr1left,expr2right))
        | expr RSHIFTEQUALS expr	(markExpression srcMap (Binop(RshiftAssign,expr1,expr2),expr1left,expr2right))
	| expr EQUALS expr 		(markExpression srcMap (Binop(Assign,expr1,expr2),expr1left,expr2right))
        | expr OR expr  		(markExpression srcMap (Binop(Or,expr1,expr2),expr1left,expr2right))
        | expr AND expr 		(markExpression srcMap (Binop(And,expr1,expr2),expr1left,expr2right))
        | expr BAR expr 		(markExpression srcMap (Binop(BitOr,expr1,expr2),expr1left,expr2right))
        | expr HAT expr 		(markExpression srcMap (Binop(BitXor,expr1,expr2),expr1left,expr2right))
        | expr AMP expr 		(markExpression srcMap (Binop(BitAnd,expr1,expr2),expr1left,expr2right))
        | expr EQ expr 			(markExpression srcMap (Binop(Eq,expr1,expr2),expr1left,expr2right))
        | expr NEQ expr 		(markExpression srcMap (Binop(Neq,expr1,expr2),expr1left,expr2right))
        | expr LT expr 			(markExpression srcMap (Binop(Lt,expr1,expr2),expr1left,expr2right))
        | expr GT expr 			(markExpression srcMap (Binop(Gt,expr1,expr2),expr1left,expr2right))
        | expr LTE expr			(markExpression srcMap (Binop(Lte,expr1,expr2),expr1left,expr2right))
        | expr GTE expr			(markExpression srcMap (Binop(Gte,expr1,expr2),expr1left,expr2right))
        | expr LSHIFT expr		(markExpression srcMap (Binop(Lshift,expr1,expr2),expr1left,expr2right))
        | expr RSHIFT expr		(markExpression srcMap (Binop(Rshift,expr1,expr2),expr1left,expr2right))
        | expr PLUS expr		(markExpression srcMap (Binop(Plus,expr1,expr2),expr1left,expr2right))
        | expr MINUS expr		(markExpression srcMap (Binop(Minus,expr1,expr2),expr1left,expr2right))
        | expr TIMES expr		(markExpression srcMap (Binop(Times,expr1,expr2),expr1left,expr2right))
        | expr DIVIDE expr		(markExpression srcMap (Binop(Divide,expr1,expr2),expr1left,expr2right))
        | expr PERCENT expr		(markExpression srcMap (Binop(Mod,expr1,expr2),expr1left,expr2right))
	| expr INC %prec INC		(markExpression srcMap (Unop(PostInc,expr),exprleft,INCright))
	| expr DEC %prec INC		(markExpression srcMap (Unop(PostDec,expr),exprleft,DECright))
	| INC expr %prec INC		(markExpression srcMap (Unop(PreInc,expr),INCleft,exprright))
	| DEC expr %prec INC	 	(markExpression srcMap (Unop(PreDec,expr),DECleft,exprright))
	| unaryOperator expr  %prec UNARY (markExpression srcMap (Unop(unaryOperator,expr),unaryOperatorleft,exprright))
	| SIZEOF expr  			(markExpression srcMap (Unop(Sizeof,expr),SIZEOFleft,exprright))
	| LPAREN typeName RPAREN expr %prec INC 
					(markExpression srcMap (Cast (typeName,expr),LPARENleft,exprright))
	| SIZEOF LPAREN typeName RPAREN %prec SIZEOF 
					(markExpression srcMap (Unop(SizeofType typeName,EmptyExpr),SIZEOFleft,RPARENright))
	| expr LBRACE exprWComma RBRACE
					(markExpression srcMap (Binop(Sub,expr,exprWComma),exprleft,RBRACEright))



	| expr LPAREN RPAREN		(markExpression srcMap (Call(expr,[]),exprleft,RPARENright))
	| expr LPAREN argumentExprList RPAREN
					(markExpression srcMap (Call(expr, seqToList argumentExprList),exprleft,RPARENright))
	| expr DOT ID			(markExpression srcMap (Binop(Dot,expr,Id(ID)),exprleft,IDright))
	| expr ARROW ID			(markExpression srcMap (Binop(Arrow,expr,Id(ID)),exprleft,IDright))
	| expr DOT TYPE_NAME		(markExpression srcMap (Binop(Dot,expr,Id(TYPE_NAME)),exprleft,TYPE_NAMEright))
	| expr ARROW TYPE_NAME		(markExpression srcMap (Binop(Arrow,expr,Id(TYPE_NAME)),exprleft,TYPE_NAMEright))
	| LPAREN exprWComma RPAREN	(markExpression srcMap (exprWComma,LPARENleft,RPARENright))
	| DECNUM			(markExpression srcMap (IntConst DECNUM,DECNUMleft,DECNUMright))
        | REALNUM                       (markExpression srcMap (RealConst REALNUM, REALNUMleft,REALNUMright))
	| CCONST			(markExpression srcMap (IntConst CCONST, CCONSTleft,CCONSTright))
	| ID				(markExpression srcMap (Id(ID), IDleft, IDright))
        | strings                       (markExpression srcMap (String(strings),stringsleft,stringsright))


strings:  STRING                        (STRING)
	| STRING strings		(STRING ^ strings)



exprWComma:
	  expr 				(expr)
	| exprWComma COMMA expr 	(markExpression srcMap (Binop(Comma,exprWComma,expr),exprWCommaleft,exprright))

opExpr:					(EmptyExpr)
	| exprWComma			(exprWComma)


argumentExprList:
	 expr				(singletonSeq expr)
	| argumentExprList COMMA expr   (addToSeq(expr, argumentExprList))

typeName:
	  specifierQualifierList  	(specifierQualifierList)
	| specifierQualifierList abstractDeclarator
					(#1 (ctypeDecrToTypeName (specifierQualifierList, abstractDeclarator)))

declarationSpecifiers:
          typeSpecifier reservedDeclarationSpecifier
                                        (addSpecifier (typeSpecifier,
						        reservedDeclarationSpecifier))
        | declarationModifiers typeSpecifier reservedDeclarationSpecifier
                                        (addAll (declarationModifiers,
                                                  addSpecifier (typeSpecifier,
							         reservedDeclarationSpecifier)))

reservedDeclarationSpecifier:
                                        (unknown)
        | reservedDeclarationSpecifier specifierQualifierReserved
                                        (let val {qualifiers,specifiers} = specifierQualifierReserved
					     val decltype = {qualifiers=qualifiers,specifiers=specifiers,storage=[]}
	   				 in addAll (decltype, reservedDeclarationSpecifier) end )
        | reservedDeclarationSpecifier storageClassSpecifier
                                        (addStorage (storageClassSpecifier,
                                                      reservedDeclarationSpecifier))

specifierQualifierReserved:
          typeSpecifierReserved       ({qualifiers=[],specifiers=[typeSpecifierReserved]})
        | typeQualifier                ({qualifiers=[typeQualifier],specifiers=[]})
        | structOrUnionSpecifier     ({qualifiers=[],specifiers=[structOrUnionSpecifier]})
        | enumSpecifier                ({qualifiers=[],specifiers=[enumSpecifier]})

declarationModifiers:
          storageClassSpecifier
                                        ({storage = [storageClassSpecifier],
					  qualifiers = [],
					  specifiers = []})
        | declarationModifiers storageClassSpecifier
                                        (addStorage(storageClassSpecifier,declarationModifiers))
        | typeQualifier
                                        ({specifiers = [],
	 				  storage = [], 
					  qualifiers = [typeQualifier]})
        | declarationModifiers typeQualifier
                                        (addQualifier(typeQualifier, declarationModifiers))

specifierQualifierList:
          typeSpecifier reservedSpecifierQualifiers
                                        (let val {specifiers, qualifiers} = reservedSpecifierQualifiers
	                                 in {specifiers=typeSpecifier::specifiers,qualifiers=qualifiers} end)
						       
        | typeQualifierList typeSpecifier reservedSpecifierQualifiers
					(let val {specifiers, qualifiers} = reservedSpecifierQualifiers
	                                 in {specifiers=typeSpecifier::specifiers
					    ,qualifiers=typeQualifierList@qualifiers
                                            }
                                         end)

reservedSpecifierQualifiers:
                                        ({qualifiers=[],specifiers=[]})
        | reservedSpecifierQualifiers specifierQualifierReserved
                                        (let val {specifiers=s1, qualifiers=q1} = reservedSpecifierQualifiers
					     val {specifiers=s2, qualifiers=q2} = specifierQualifierReserved
	                                 in {specifiers=s1@s2, qualifiers=q1@q2} end)
		
typeQualifierList:
          typeQualifier                ([typeQualifier])

	| typeQualifier typeQualifierList 
                                        (typeQualifier::typeQualifierList)

typeSpecifier:
          typeSpecifierReserved       (typeSpecifierReserved)
        | structOrUnionSpecifier	(structOrUnionSpecifier)
        | enumSpecifier		(enumSpecifier)
        | TYPE_NAME			(TypedefName TYPE_NAME)

typeSpecifierReserved:
	  VOID				(Void)
        | CHAR 				(Char)
        | SHORT 			(Short)
	| INT  				(Int)
	| LONG				(Long)
        | FLOAT				(Float)
	| DOUBLE			(Double)
	| SIGNED			(Signed)
	| UNSIGNED			(Unsigned)


structOrUnionSpecifier:
          structOrUnion LCURLY structDeclarationList RCURLY
	       (Struct{isStruct=structOrUnion, tagOpt=NONE, members=seqToList structDeclarationList})
		
        | structOrUnion ID LCURLY structDeclarationList RCURLY
	     (Struct{isStruct=structOrUnion, tagOpt=SOME ID, members=seqToList structDeclarationList})

        | structOrUnion TYPE_NAME LCURLY structDeclarationList RCURLY
	     (Struct{isStruct=structOrUnion, tagOpt=SOME TYPE_NAME, members=seqToList structDeclarationList})

        | structOrUnion ID	 	(StructTag {isStruct=structOrUnion, name=ID})

        | structOrUnion TYPE_NAME 	(StructTag {isStruct=structOrUnion, name=TYPE_NAME})

	  (* humor me: consider true for struct *)
structOrUnion:
	  STRUCT 			(true)
	| UNION				(false)

structDeclarationList:
	  structDeclaration		(singletonSeq structDeclaration)
        | structDeclarationList structDeclaration
					(addToSeq(structDeclaration, structDeclarationList))

structDeclaration:
	specifierQualifierList structDeclaratorList SEMICOLON
					((specifierQualifierList, seqToList structDeclaratorList))
        | typeQualifierList notypeStructDeclaratorList SEMICOLON
                                        (let
					    val ct = {qualifiers=typeQualifierList, specifiers=[]}
					 in
					   (ct, seqToList notypeStructDeclaratorList)
					 end)

structDeclaratorList:
          structDeclarator		(singletonSeq structDeclarator)
        | structDeclaratorList COMMA structDeclarator
					(addToSeq(structDeclarator, structDeclaratorList))

notypeStructDeclaratorList:
          notypeStructDeclarator	(singletonSeq notypeStructDeclarator)
        | notypeStructDeclaratorList COMMA structDeclarator
					(addToSeq(structDeclarator, notypeStructDeclaratorList))

structDeclarator:
	  declarator			(declarator, EmptyExpr)
	| COLON expr			(EmptyDecr, expr)
	| declarator COLON expr		(declarator, expr)

notypeStructDeclarator:
	  notypeDeclarator		(notypeDeclarator, EmptyExpr)
	| COLON expr			(EmptyDecr, expr)
	| notypeDeclarator COLON expr	(notypeDeclarator, expr)

typeQualifier:
	  CONST				(CONST)
	| VOLATILE			(VOLATILE)

enumSpecifier:
          ENUM LCURLY enumeratorList trailingComma RCURLY
		(Enum{tagOpt=NONE, enumerators=seqToList enumeratorList, trailingComma=trailingComma})

        | ENUM ID LCURLY enumeratorList trailingComma RCURLY 
		(Enum{tagOpt=SOME(ID), enumerators=seqToList enumeratorList, trailingComma=trailingComma})

	| ENUM TYPE_NAME LCURLY enumeratorList trailingComma RCURLY 
		(Enum{tagOpt=SOME(TYPE_NAME), enumerators=seqToList enumeratorList, trailingComma=trailingComma})
        
        | ENUM ID			(EnumTag(ID))

        | ENUM TYPE_NAME		(EnumTag(TYPE_NAME))

enumeratorList:
	  enumeratorList COMMA enumerator 
					(addToSeq(enumerator, enumeratorList))
	| enumerator			((TypeDefs.addNoTdef(#1(enumerator)));
					 singletonSeq enumerator)

enumerator:
	  ID				((ID,ParseTree.EmptyExpr))
	| ID EQUALS expr		(ID,expr)

storageClassSpecifier: 
	  EXTERN 			(EXTERN)
        | STATIC 			(STATIC)
	| AUTO				(AUTO)
        | REGISTER			(REGISTER)
	| TYPEDEF                       (TYPEDEF)

trailingComma:				(false)
	| COMMA				(true)
 
initDeclaratorList:
	  initDeclarator		(singletonSeq initDeclarator)
	| initDeclaratorList COMMA initDeclarator
					(addToSeq(initDeclarator, initDeclaratorList))

initDeclarator:
	  declarator			((declarator,EmptyExpr))
	| declarator EQUALS initializer (declarator,initializer)

notypeInitDeclaratorList:
          notypeInitDeclarator         (singletonSeq notypeInitDeclarator)
        | notypeInitDeclaratorList COMMA initDeclarator
                                       (addToSeq(initDeclarator, notypeInitDeclaratorList))

notypeInitDeclarator:
          notypeDeclarator             ((notypeDeclarator,EmptyExpr))
        | notypeDeclarator EQUALS initializer
                                        (notypeDeclarator,initializer)

declarator:
          aftertypeDeclarator          (aftertypeDeclarator)
        | notypeDeclarator             (notypeDeclarator)

aftertypeDeclarator:
	  aftertypeDirectDeclarator		(aftertypeDirectDeclarator)
	| pointer aftertypeDirectDeclarator	(applyPointer(pointer,aftertypeDirectDeclarator))

notypeDeclarator:
          notypeDirectDeclarator      (notypeDirectDeclarator)
        | pointer notypeDirectDeclarator 
                                        (applyPointer(pointer, notypeDirectDeclarator))

parmDeclarator:
          parmDirectDeclarator        (parmDirectDeclarator)
        | pointer parmDirectDeclarator
                                        (applyPointer(pointer, parmDirectDeclarator))

pointer:
	  TIMES				(PointerDecr(EmptyDecr))
	| TIMES typeQualifierList
                                        (PointerDecr(loopQd(typeQualifierList,EmptyDecr)))
	| TIMES pointer			(PointerDecr(pointer))
	| TIMES typeQualifierList pointer
					(PointerDecr(loopQd(typeQualifierList,pointer)))

aftertypeDirectDeclarator:
 	  TYPE_NAME			(markDeclarator srcMap (VarDecr TYPE_NAME,TYPE_NAMEleft,TYPE_NAMEright))
	| LPAREN aftertypeDeclarator RPAREN		
					(aftertypeDeclarator)
	| aftertypeDirectDeclarator  LBRACE RBRACE %prec DOT
					(ArrayDecr (aftertypeDirectDeclarator,EmptyExpr))
	| aftertypeDirectDeclarator LBRACE expr RBRACE %prec DOT
					(ArrayDecr (aftertypeDirectDeclarator,expr))
	| aftertypeDirectDeclarator LPAREN RPAREN		%prec DOT
					(FuncDecr (aftertypeDirectDeclarator,nil))
	| aftertypeDirectDeclarator LPAREN parameterTypeList RPAREN		 %prec DOT
					(FuncDecr (aftertypeDirectDeclarator,parameterTypeList))
	| aftertypeDirectDeclarator LPAREN identlist RPAREN		%prec DOT
					(FuncDecr (aftertypeDirectDeclarator,
					    map (fn (x,y,z) => (unknown,markDeclarator srcMap (VarDecr x,y,z))) (seqToList identlist)))

notypeDirectDeclarator:
	  ID				(markDeclarator srcMap (VarDecr ID,IDleft,IDright))
	| LPAREN notypeDeclarator RPAREN		
					(notypeDeclarator)
	| notypeDirectDeclarator LBRACE RBRACE %prec DOT
					(ArrayDecr (notypeDirectDeclarator,EmptyExpr))
	| notypeDirectDeclarator LBRACE expr RBRACE  %prec DOT
					(ArrayDecr (notypeDirectDeclarator,expr))
	| notypeDirectDeclarator LPAREN RPAREN	 %prec DOT	
					(FuncDecr (notypeDirectDeclarator,nil))
	| notypeDirectDeclarator LPAREN parameterTypeList RPAREN	 %prec DOT	
					(FuncDecr (notypeDirectDeclarator,parameterTypeList))
	| notypeDirectDeclarator LPAREN identlist RPAREN	 %prec DOT	
					(FuncDecr (notypeDirectDeclarator,
 						   map (fn (x,y,z) => (unknown,markDeclarator srcMap (VarDecr x,y,z))) (seqToList identlist)))

parmDirectDeclarator:
 	  TYPE_NAME			(markDeclarator srcMap (VarDecr TYPE_NAME,TYPE_NAMEleft,TYPE_NAMEright))
	| parmDirectDeclarator LBRACE RBRACE  %prec DOT
					(ArrayDecr (parmDirectDeclarator,EmptyExpr))
	| parmDirectDeclarator LBRACE expr RBRACE  %prec DOT
					(ArrayDecr (parmDirectDeclarator,expr))
	| parmDirectDeclarator LPAREN RPAREN		 %prec DOT
					(FuncDecr (parmDirectDeclarator,nil))
	| parmDirectDeclarator LPAREN parameterTypeList RPAREN	 %prec DOT	
					(FuncDecr (parmDirectDeclarator,parameterTypeList))
	| parmDirectDeclarator LPAREN identlist RPAREN	 %prec DOT	
					(FuncDecr (parmDirectDeclarator,
						    map (fn (x,y,z) => (unknown,markDeclarator srcMap (VarDecr x,y,z))) (seqToList identlist)))

initializer:
	  expr				(expr)
        | LCURLY initializerList trailingComma RCURLY
					(markExpression srcMap (InitList(seqToList initializerList),LCURLYleft,RCURLYright))

initializerList:
          initializer			(singletonSeq initializer)
        | initializerList COMMA initializer 
					(addToSeq(initializer, initializerList))

declarationList:
          declaration		        (singletonSeq(markDeclaration srcMap (declaration,
									      declarationleft,
								              declarationright)))
	| declarationList declaration	(addToSeq(markDeclaration srcMap (declaration,
							            	  declarationleft,
									  declarationright),
						  declarationList))
	  
identlist:
	  ID			(singletonSeq (ID,IDleft,IDright))
	| identlist COMMA ID	(addToSeq((ID,IDleft,IDright),identlist))

(* Put function name in the current scope and param names in a pushed scope. *)
fDefDeclaration:
          notypeDeclarator
                                        (insertFuncName(notypeDeclarator);
					 TypeDefs.pushScope();
					 insertFuncParams(notypeDeclarator);
					 (unknown, notypeDeclarator))
        | declarationSpecifiers declarator
	                                (insertFuncName(declarator);
					 TypeDefs.pushScope();
					 insertFuncParams(declarator);
					 (declarationSpecifiers, declarator))

        | declarationModifiers notypeDeclarator
	                                (insertFuncName(notypeDeclarator);
					 TypeDefs.pushScope();
					 insertFuncParams(notypeDeclarator);
					 (declarationModifiers, notypeDeclarator))

functionDefinition:
 	  fDefDeclaration compoundStatement
                                        (TypeDefs.popScope();
					 FunctionDef
					    {retType = #1 fDefDeclaration,
					     funDecr = #2 fDefDeclaration,
                                             krParams = [],
                                             body = compoundStatement})
					
	| fDefDeclaration declarationList compoundStatement
                                        (TypeDefs.popScope();
					 FunctionDef 
					    {retType = #1 fDefDeclaration,
					     funDecr = #2 fDefDeclaration,
                                             krParams = seqToList declarationList,
                                             body = compoundStatement})
					
abstractDeclarator:
	  pointer			(applyPointer (pointer, EmptyDecr))
	| directAbstractDeclarator	(directAbstractDeclarator)
	| pointer directAbstractDeclarator	
					(applyPointer(pointer, directAbstractDeclarator))

directAbstractDeclarator:
	  LPAREN abstractDeclarator RPAREN	(abstractDeclarator) 
        | LBRACE RBRACE 			(ArrayDecr(EmptyDecr, EmptyExpr))
        | LBRACE expr RBRACE 			(ArrayDecr(EmptyDecr, expr))
        | directAbstractDeclarator LBRACE RBRACE
						(ArrayDecr (directAbstractDeclarator,EmptyExpr))
        | directAbstractDeclarator LBRACE expr RBRACE 
						(ArrayDecr (directAbstractDeclarator,expr))
        | LPAREN RPAREN				(FuncDecr (EmptyDecr ,nil))
        | LPAREN parameterTypeList RPAREN	(FuncDecr (EmptyDecr, parameterTypeList))
        | directAbstractDeclarator LPAREN RPAREN
						(FuncDecr (directAbstractDeclarator,nil))
        | directAbstractDeclarator LPAREN parameterTypeList RPAREN 
						(FuncDecr (directAbstractDeclarator, parameterTypeList))

parameterTypeList:
	  parameterList	                        (seqToList parameterList)
        | parameterList COMMA ELIPSIS
				(let val decltype = {specifiers=[Ellipses],qualifiers=[],storage=[]}
	        		 in (seqToList parameterList) @ [(decltype, EllipsesDecr)] end)

parameterList:
	parameterDeclaration	
                                (singletonSeq(#1 parameterDeclaration,
                                              markDeclarator srcMap (#2 parameterDeclaration,
							             parameterDeclarationleft,
								     parameterDeclarationright)))
        | parameterList COMMA parameterDeclaration 
	                        (addToSeq((#1 parameterDeclaration,
	                                           markDeclarator
	                                            srcMap 
                                                     (#2 parameterDeclaration,
						      parameterDeclarationleft,
						      parameterDeclarationright)),
					  parameterList))

(* Decided not a push and pop a scope at the parameterDeclarations, because we
 * are not going to directly plug these names in the tdef table. If this is just
 * a function declaration, the names here do not matter to the tdef table. If
 * this will be part of func definition, we put all these names in tdef table at
 * proper scope correctly, later on.
 * Note: We miss syntax errors like int f(int foo, foo bar);, if foo was a typename
 *)
parameterDeclaration:
          declarationSpecifiers  notypeDeclarator
					((declarationSpecifiers, notypeDeclarator))
        | declarationSpecifiers  parmDeclarator
					((declarationSpecifiers, parmDeclarator))

        | declarationSpecifiers 	(* this case can arise for function prototypes *)
					((declarationSpecifiers, EmptyDecr))

        | declarationSpecifiers  abstractDeclarator
					((declarationSpecifiers, abstractDeclarator))

        | declarationModifiers  notypeDeclarator
                                       ((declarationModifiers, notypeDeclarator))

        | declarationModifiers  abstractDeclarator
                                       ((declarationModifiers, abstractDeclarator))

pushScope:
                                        (TypeDefs.pushScope())

popScope:
                                        (TypeDefs.popScope())



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