parsing_cocci/visitor_ast.ml

   1 module Ast0 = Ast0_cocci
   2 module Ast = Ast_cocci
   3
   4 (* --------------------------------------------------------------------- *)
   5 (* Generic traversal: combiner *)
   6 (* parameters:
   7    combining function
   8    treatment of: mcode, identifiers, expressions, fullTypes, types,
   9    declarations, statements, toplevels
  10    default value for options *)
  11
  12 type 'a combiner =
  13     {combiner_ident : Ast.ident -> 'a;
  14      combiner_expression : Ast.expression -> 'a;
  15      combiner_fullType : Ast.fullType -> 'a;
  16      combiner_typeC : Ast.typeC -> 'a;
  17      combiner_declaration : Ast.declaration -> 'a;
  18      combiner_initialiser : Ast.initialiser -> 'a;
  19      combiner_parameter : Ast.parameterTypeDef -> 'a;
  20      combiner_parameter_list : Ast.parameter_list -> 'a;
  21      combiner_rule_elem : Ast.rule_elem -> 'a;
  22      combiner_statement : Ast.statement -> 'a;
  23      combiner_case_line : Ast.case_line -> 'a;
  24      combiner_top_level : Ast.top_level -> 'a;
  25      combiner_anything : Ast.anything  -> 'a;
  26      combiner_expression_dots : Ast.expression Ast.dots -> 'a;
  27      combiner_statement_dots : Ast.statement Ast.dots -> 'a;
  28      combiner_declaration_dots : Ast.declaration Ast.dots -> 'a}
  29
  30 type ('mc,'a) cmcode = 'a combiner -> 'mc Ast_cocci.mcode -> 'a
  31 type ('cd,'a) ccode = 'a combiner -> ('cd -> 'a) -> 'cd -> 'a
  32
  33
  34 let combiner bind option_default
  35     meta_mcodefn string_mcodefn const_mcodefn assign_mcodefn fix_mcodefn
  36     unary_mcodefn binary_mcodefn
  37     cv_mcodefn sign_mcodefn struct_mcodefn storage_mcodefn
  38     inc_file_mcodefn
  39     expdotsfn paramdotsfn stmtdotsfn decldotsfn
  40     identfn exprfn ftfn tyfn initfn paramfn declfn rulefn stmtfn casefn
  41     topfn anyfn =
  42   let multibind l =
  43     let rec loop = function
  44         [] -> option_default
  45       | [x] -> x
  46       | x::xs -> bind x (loop xs) in
  47     loop l in
  48   let get_option f = function
  49       Some x -> f x
  50     | None -> option_default in
  51
  52   let rec meta_mcode x = meta_mcodefn all_functions x
  53   and string_mcode x = string_mcodefn all_functions x
  54   and const_mcode x = const_mcodefn all_functions x
  55   and assign_mcode x = assign_mcodefn all_functions x
  56   and fix_mcode x = fix_mcodefn all_functions x
  57   and unary_mcode x = unary_mcodefn all_functions x
  58   and binary_mcode x = binary_mcodefn all_functions x
  59   and cv_mcode x = cv_mcodefn all_functions x
  60   and sign_mcode x = sign_mcodefn all_functions x
  61   and struct_mcode x = struct_mcodefn all_functions x
  62   and storage_mcode x = storage_mcodefn all_functions x
  63   and inc_file_mcode x = inc_file_mcodefn all_functions x
  64
  65   and expression_dots d =
  66     let k d =
  67       match Ast.unwrap d with
  68         Ast.DOTS(l) | Ast.CIRCLES(l) | Ast.STARS(l) ->
  69           multibind (List.map expression l) in
  70     expdotsfn all_functions k d
  71
  72   and parameter_dots d =
  73     let k d =
  74       match Ast.unwrap d with
  75         Ast.DOTS(l) | Ast.CIRCLES(l) | Ast.STARS(l) ->
  76           multibind (List.map parameterTypeDef l) in
  77     paramdotsfn all_functions k d
  78
  79   and statement_dots d =
  80     let k d =
  81       match Ast.unwrap d with
  82         Ast.DOTS(l) | Ast.CIRCLES(l) | Ast.STARS(l) ->
  83           multibind (List.map statement l) in
  84     stmtdotsfn all_functions k d
  85
  86   and declaration_dots d =
  87     let k d =
  88       match Ast.unwrap d with
  89         Ast.DOTS(l) | Ast.CIRCLES(l) | Ast.STARS(l) ->
  90           multibind (List.map declaration l) in
  91     decldotsfn all_functions k d
  92
  93   and ident i =
  94     let k i =
  95       match Ast.unwrap i with
  96           Ast.Id(name) -> string_mcode name
  97         | Ast.MetaId(name,_,_,_) -> meta_mcode name
  98         | Ast.MetaFunc(name,_,_,_) -> meta_mcode name
  99         | Ast.MetaLocalFunc(name,_,_,_) -> meta_mcode name
 100         | Ast.OptIdent(id) -> ident id
 101         | Ast.UniqueIdent(id) -> ident id in
 102       identfn all_functions k i
 103
 104   and expression e =
 105     let k e =
 106       match Ast.unwrap e with
 107         Ast.Ident(id) -> ident id
 108       | Ast.Constant(const) -> const_mcode const
 109       | Ast.FunCall(fn,lp,args,rp) ->
 110           multibind [expression fn; string_mcode lp; expression_dots args;
 111                       string_mcode rp]
 112       | Ast.Assignment(left,op,right,simple) ->
 113           multibind [expression left; assign_mcode op; expression right]
 114       | Ast.CondExpr(exp1,why,exp2,colon,exp3) ->
 115           multibind [expression exp1; string_mcode why;
 116                       get_option expression exp2; string_mcode colon;
 117                       expression exp3]
 118       | Ast.Postfix(exp,op) -> bind (expression exp) (fix_mcode op)
 119       | Ast.Infix(exp,op) -> bind (fix_mcode op) (expression exp)
 120       | Ast.Unary(exp,op) -> bind (unary_mcode op) (expression exp)
 121       | Ast.Binary(left,op,right) ->
 122           multibind [expression left; binary_mcode op; expression right]
 123       | Ast.Nested(left,op,right) ->
 124           multibind [expression left; binary_mcode op; expression right]
 125       | Ast.Paren(lp,exp,rp) ->
 126           multibind [string_mcode lp; expression exp; string_mcode rp]
 127       | Ast.ArrayAccess(exp1,lb,exp2,rb) ->
 128           multibind
 129             [expression exp1; string_mcode lb; expression exp2;
 130               string_mcode rb]
 131       | Ast.RecordAccess(exp,pt,field) ->
 132           multibind [expression exp; string_mcode pt; ident field]
 133       | Ast.RecordPtAccess(exp,ar,field) ->
 134           multibind [expression exp; string_mcode ar; ident field]
 135       | Ast.Cast(lp,ty,rp,exp) ->
 136           multibind
 137             [string_mcode lp; fullType ty; string_mcode rp; expression exp]
 138       | Ast.SizeOfExpr(szf,exp) ->
 139           multibind [string_mcode szf; expression exp]
 140       | Ast.SizeOfType(szf,lp,ty,rp) ->
 141           multibind
 142             [string_mcode szf; string_mcode lp; fullType ty; string_mcode rp]
 143       | Ast.TypeExp(ty) -> fullType ty
 144       | Ast.MetaErr(name,_,_,_)
 145       | Ast.MetaExpr(name,_,_,_,_,_)
 146       | Ast.MetaExprList(name,_,_,_) -> meta_mcode name
 147       | Ast.EComma(cm) -> string_mcode cm
 148       | Ast.DisjExpr(exp_list) -> multibind (List.map expression exp_list)
 149       | Ast.NestExpr(starter,expr_dots,ender,whencode,multi) ->
 150           bind (string_mcode starter)
 151             (bind (expression_dots expr_dots)
 152                (bind (string_mcode ender)
 153                   (get_option expression whencode)))
 154       | Ast.Edots(dots,whencode) | Ast.Ecircles(dots,whencode)
 155       | Ast.Estars(dots,whencode) ->
 156           bind (string_mcode dots) (get_option expression whencode)
 157       | Ast.OptExp(exp) | Ast.UniqueExp(exp) ->
 158           expression exp in
 159     exprfn all_functions k e
 160
 161   and fullType ft =
 162     let k ft =
 163       match Ast.unwrap ft with
 164         Ast.Type(cv,ty) -> bind (get_option cv_mcode cv) (typeC ty)
 165       | Ast.DisjType(types) -> multibind (List.map fullType types)
 166       | Ast.OptType(ty) -> fullType ty
 167       | Ast.UniqueType(ty) -> fullType ty in
 168     ftfn all_functions k ft
 169
 170   and function_pointer (ty,lp1,star,rp1,lp2,params,rp2) extra =
 171     (* have to put the treatment of the identifier into the right position *)
 172     multibind
 173       ([fullType ty; string_mcode lp1; string_mcode star] @ extra @
 174        [string_mcode rp1;
 175          string_mcode lp2; parameter_dots params; string_mcode rp2])
 176
 177   and function_type (ty,lp1,params,rp1) extra =
 178     (* have to put the treatment of the identifier into the right position *)
 179     multibind
 180       ([get_option fullType ty] @ extra @
 181        [string_mcode lp1; parameter_dots params; string_mcode rp1])
 182
 183   and array_type (ty,lb,size,rb) extra =
 184     multibind
 185       ([fullType ty] @ extra @
 186        [string_mcode lb; get_option expression size; string_mcode rb])
 187
 188   and typeC ty =
 189     let k ty =
 190       match Ast.unwrap ty with
 191         Ast.BaseType(ty,strings) -> multibind (List.map string_mcode strings)
 192       | Ast.SignedT(sgn,ty) -> bind (sign_mcode sgn) (get_option typeC ty)
 193       | Ast.Pointer(ty,star) ->
 194           bind (fullType ty) (string_mcode star)
 195       | Ast.FunctionPointer(ty,lp1,star,rp1,lp2,params,rp2) ->
 196           function_pointer (ty,lp1,star,rp1,lp2,params,rp2) []
 197       | Ast.FunctionType (_,ty,lp1,params,rp1) ->
 198           function_type (ty,lp1,params,rp1) []
 199       | Ast.Array(ty,lb,size,rb) -> array_type (ty,lb,size,rb) []
 200       | Ast.EnumName(kind,name) -> bind (string_mcode kind) (ident name)
 201       | Ast.StructUnionName(kind,name) ->
 202           bind (struct_mcode kind) (get_option ident name)
 203       | Ast.StructUnionDef(ty,lb,decls,rb) ->
 204           multibind
 205             [fullType ty; string_mcode lb; declaration_dots decls;
 206               string_mcode rb]
 207       | Ast.TypeName(name) -> string_mcode name
 208       | Ast.MetaType(name,_,_) -> meta_mcode name in
 209     tyfn all_functions k ty
 210
 211   and named_type ty id =
 212     match Ast.unwrap ty with
 213       Ast.Type(None,ty1) ->
 214         (match Ast.unwrap ty1 with
 215           Ast.FunctionPointer(ty,lp1,star,rp1,lp2,params,rp2) ->
 216             function_pointer (ty,lp1,star,rp1,lp2,params,rp2) [ident id]
 217         | Ast.FunctionType(_,ty,lp1,params,rp1) ->
 218             function_type (ty,lp1,params,rp1) [ident id]
 219         | Ast.Array(ty,lb,size,rb) -> array_type (ty,lb,size,rb) [ident id]
 220         | _ -> bind (fullType ty) (ident id))
 221     | _ -> bind (fullType ty) (ident id)
 222
 223   and declaration d =
 224     let k d =
 225       match Ast.unwrap d with
 226         Ast.MetaDecl(name,_,_) | Ast.MetaField(name,_,_) -> meta_mcode name
 227       | Ast.Init(stg,ty,id,eq,ini,sem) ->
 228           bind (get_option storage_mcode stg)
 229             (bind (named_type ty id)
 230                (multibind
 231                   [string_mcode eq; initialiser ini; string_mcode sem]))
 232       | Ast.UnInit(stg,ty,id,sem) ->
 233           bind (get_option storage_mcode stg)
 234             (bind (named_type ty id) (string_mcode sem))
 235       | Ast.MacroDecl(name,lp,args,rp,sem) ->
 236           multibind
 237             [ident name; string_mcode lp; expression_dots args;
 238               string_mcode rp; string_mcode sem]
 239       | Ast.TyDecl(ty,sem) -> bind (fullType ty) (string_mcode sem)
 240       | Ast.Typedef(stg,ty,id,sem) ->
 241           bind (string_mcode stg)
 242             (bind (fullType ty) (bind (typeC id) (string_mcode sem)))
 243       | Ast.DisjDecl(decls) -> multibind (List.map declaration decls)
 244       | Ast.Ddots(dots,whencode) ->
 245           bind (string_mcode dots) (get_option declaration whencode)
 246       | Ast.OptDecl(decl) -> declaration decl
 247       | Ast.UniqueDecl(decl) -> declaration decl in
 248     declfn all_functions k d
 249
 250   and initialiser i =
 251     let k i =
 252       match Ast.unwrap i with
 253         Ast.MetaInit(name,_,_) -> meta_mcode name
 254       | Ast.InitExpr(exp) -> expression exp
 255       | Ast.InitList(allminus,lb,initlist,rb,whencode) ->
 256           multibind
 257             [string_mcode lb;
 258               multibind (List.map initialiser initlist);
 259               string_mcode rb;
 260               multibind (List.map initialiser whencode)]
 261       | Ast.InitGccName(name,eq,ini) ->
 262           multibind [ident name; string_mcode eq; initialiser ini]
 263       | Ast.InitGccExt(designators,eq,ini) ->
 264           multibind
 265             ((List.map designator designators) @
 266              [string_mcode eq; initialiser ini])
 267       | Ast.IComma(cm) -> string_mcode cm
 268       | Ast.OptIni(i) -> initialiser i
 269       | Ast.UniqueIni(i) -> initialiser i in
 270     initfn all_functions k i
 271
 272   and designator = function
 273       Ast.DesignatorField(dot,id) -> bind (string_mcode dot) (ident id)
 274     | Ast.DesignatorIndex(lb,exp,rb) ->
 275         bind (string_mcode lb) (bind (expression exp) (string_mcode rb))
 276     | Ast.DesignatorRange(lb,min,dots,max,rb) ->
 277         multibind
 278           [string_mcode lb; expression min; string_mcode dots;
 279             expression max; string_mcode rb]
 280
 281   and parameterTypeDef p =
 282     let k p =
 283       match Ast.unwrap p with
 284         Ast.VoidParam(ty) -> fullType ty
 285       | Ast.Param(ty,Some id) -> named_type ty id
 286       | Ast.Param(ty,None) -> fullType ty
 287       | Ast.MetaParam(name,_,_) -> meta_mcode name
 288       | Ast.MetaParamList(name,_,_,_) -> meta_mcode name
 289       | Ast.PComma(cm) -> string_mcode cm
 290       | Ast.Pdots(dots) -> string_mcode dots
 291       | Ast.Pcircles(dots) -> string_mcode dots
 292       | Ast.OptParam(param) -> parameterTypeDef param
 293       | Ast.UniqueParam(param) -> parameterTypeDef param in
 294     paramfn all_functions k p
 295
 296   and rule_elem re =
 297     let k re =
 298       match Ast.unwrap re with
 299         Ast.FunHeader(_,_,fi,name,lp,params,rp) ->
 300           multibind
 301             ((List.map fninfo fi) @
 302              [ident name;string_mcode lp;parameter_dots params;
 303                string_mcode rp])
 304       | Ast.Decl(_,_,decl) -> declaration decl
 305       | Ast.SeqStart(brace) -> string_mcode brace
 306       | Ast.SeqEnd(brace) -> string_mcode brace
 307       | Ast.ExprStatement(exp,sem) ->
 308           bind (expression exp) (string_mcode sem)
 309       | Ast.IfHeader(iff,lp,exp,rp) ->
 310           multibind [string_mcode iff; string_mcode lp; expression exp;
 311                       string_mcode rp]
 312       | Ast.Else(els) -> string_mcode els
 313       | Ast.WhileHeader(whl,lp,exp,rp) ->
 314           multibind [string_mcode whl; string_mcode lp; expression exp;
 315                       string_mcode rp]
 316       | Ast.DoHeader(d) -> string_mcode d
 317       | Ast.WhileTail(whl,lp,exp,rp,sem) ->
 318           multibind [string_mcode whl; string_mcode lp; expression exp;
 319                       string_mcode rp; string_mcode sem]
 320       | Ast.ForHeader(fr,lp,e1,sem1,e2,sem2,e3,rp) ->
 321           multibind [string_mcode fr; string_mcode lp;
 322                       get_option expression e1; string_mcode sem1;
 323                       get_option expression e2; string_mcode sem2;
 324                       get_option expression e3; string_mcode rp]
 325       | Ast.IteratorHeader(nm,lp,args,rp) ->
 326           multibind [ident nm; string_mcode lp;
 327                       expression_dots args; string_mcode rp]
 328       | Ast.SwitchHeader(switch,lp,exp,rp) ->
 329           multibind [string_mcode switch; string_mcode lp; expression exp;
 330                       string_mcode rp]
 331       | Ast.Break(br,sem) -> bind (string_mcode br) (string_mcode sem)
 332       | Ast.Continue(cont,sem) -> bind (string_mcode cont) (string_mcode sem)
 333       | Ast.Label(l,dd) -> bind (ident l) (string_mcode dd)
 334       | Ast.Goto(goto,l,sem) ->
 335           bind (string_mcode goto) (bind (ident l) (string_mcode sem))
 336       | Ast.Return(ret,sem) -> bind (string_mcode ret) (string_mcode sem)
 337       | Ast.ReturnExpr(ret,exp,sem) ->
 338           multibind [string_mcode ret; expression exp; string_mcode sem]
 339       | Ast.MetaStmt(name,_,_,_) -> meta_mcode name
 340       | Ast.MetaStmtList(name,_,_) -> meta_mcode name
 341       | Ast.MetaRuleElem(name,_,_) -> meta_mcode name
 342       | Ast.Exp(exp) -> expression exp
 343       | Ast.TopExp(exp) -> expression exp
 344       | Ast.Ty(ty) -> fullType ty
 345       | Ast.TopInit(init) -> initialiser init
 346       | Ast.Include(inc,name) -> bind (string_mcode inc) (inc_file_mcode name)
 347       | Ast.DefineHeader(def,id,params) ->
 348           multibind [string_mcode def; ident id; define_parameters params]
 349       | Ast.Default(def,colon) -> bind (string_mcode def) (string_mcode colon)
 350       | Ast.Case(case,exp,colon) ->
 351           multibind [string_mcode case; expression exp; string_mcode colon]
 352       | Ast.DisjRuleElem(res) -> multibind (List.map rule_elem res) in
 353     rulefn all_functions k re
 354
 355   (* not parameterizable for now... *)
 356   and define_parameters p =
 357     let k p =
 358       match Ast.unwrap p with
 359         Ast.NoParams -> option_default
 360       | Ast.DParams(lp,params,rp) ->
 361           multibind
 362             [string_mcode lp; define_param_dots params; string_mcode rp] in
 363     k p
 364
 365   and define_param_dots d =
 366     let k d =
 367       match Ast.unwrap d with
 368         Ast.DOTS(l) | Ast.CIRCLES(l) | Ast.STARS(l) ->
 369           multibind (List.map define_param l) in
 370     k d
 371
 372   and define_param p =
 373     let k p =
 374       match Ast.unwrap p with
 375         Ast.DParam(id) -> ident id
 376       | Ast.DPComma(comma) -> string_mcode comma
 377       | Ast.DPdots(d) -> string_mcode d
 378       | Ast.DPcircles(c) -> string_mcode c
 379       | Ast.OptDParam(dp) -> define_param dp
 380       | Ast.UniqueDParam(dp) -> define_param dp in
 381     k p
 382
 383   (* discard the result, because the statement is assumed to be already
 384      represented elsewhere in the code *)
 385   and process_bef_aft s =
 386     match Ast.get_dots_bef_aft s with
 387       Ast.NoDots -> ()
 388     | Ast.DroppingBetweenDots(stm,ind) -> let _ = statement stm in ()
 389     | Ast.AddingBetweenDots(stm,ind) -> let _ = statement stm in ()
 390
 391   and statement s =
 392     process_bef_aft s;
 393     let k s =
 394       match Ast.unwrap s with
 395         Ast.Seq(lbrace,body,rbrace) ->
 396           multibind [rule_elem lbrace;
 397                       statement_dots body; rule_elem rbrace]
 398       | Ast.IfThen(header,branch,_) ->
 399           multibind [rule_elem header; statement branch]
 400       | Ast.IfThenElse(header,branch1,els,branch2,_) ->
 401           multibind [rule_elem header; statement branch1; rule_elem els;
 402                       statement branch2]
 403       | Ast.While(header,body,_) ->
 404           multibind [rule_elem header; statement body]
 405       | Ast.Do(header,body,tail) ->
 406           multibind [rule_elem header; statement body; rule_elem tail]
 407       | Ast.For(header,body,_) -> multibind [rule_elem header; statement body]
 408       | Ast.Iterator(header,body,_) ->
 409           multibind [rule_elem header; statement body]
 410       | Ast.Switch(header,lb,decls,cases,rb) ->
 411           multibind [rule_elem header;rule_elem lb;
 412                       statement_dots decls;
 413                       multibind (List.map case_line cases);
 414                       rule_elem rb]
 415       | Ast.Atomic(re) -> rule_elem re
 416       | Ast.Disj(stmt_dots_list) ->
 417           multibind (List.map statement_dots stmt_dots_list)
 418       | Ast.Nest(starter,stmt_dots,ender,whn,_,_,_) ->
 419           bind (string_mcode starter)
 420             (bind (statement_dots stmt_dots)
 421                (bind (string_mcode ender)
 422                   (multibind
 423                      (List.map (whencode statement_dots statement) whn))))
 424       | Ast.FunDecl(header,lbrace,body,rbrace) ->
 425           multibind [rule_elem header; rule_elem lbrace;
 426                       statement_dots body; rule_elem rbrace]
 427       | Ast.Define(header,body) ->
 428           bind (rule_elem header) (statement_dots body)
 429       | Ast.Dots(d,whn,_,_) | Ast.Circles(d,whn,_,_) | Ast.Stars(d,whn,_,_) ->
 430           bind (string_mcode d)
 431             (multibind (List.map (whencode statement_dots statement) whn))
 432       | Ast.OptStm(stmt) | Ast.UniqueStm(stmt) ->
 433           statement stmt in
 434     stmtfn all_functions k s
 435
 436   and fninfo = function
 437       Ast.FStorage(stg) -> storage_mcode stg
 438     | Ast.FType(ty) -> fullType ty
 439     | Ast.FInline(inline) -> string_mcode inline
 440     | Ast.FAttr(attr) -> string_mcode attr
 441
 442   and whencode notfn alwaysfn = function
 443       Ast.WhenNot a -> notfn a
 444     | Ast.WhenAlways a -> alwaysfn a
 445     | Ast.WhenModifier(_) -> option_default
 446     | Ast.WhenNotTrue(e) -> rule_elem e
 447     | Ast.WhenNotFalse(e) -> rule_elem e
 448
 449   and case_line c =
 450     let k c =
 451       match Ast.unwrap c with
 452         Ast.CaseLine(header,code) ->
 453           bind (rule_elem header) (statement_dots code)
 454       | Ast.OptCase(case) -> case_line case in
 455     casefn all_functions k c
 456
 457   and top_level t =
 458     let k t =
 459       match Ast.unwrap t with
 460         Ast.FILEINFO(old_file,new_file) ->
 461           bind (string_mcode old_file) (string_mcode new_file)
 462       | Ast.DECL(stmt) -> statement stmt
 463       | Ast.CODE(stmt_dots) -> statement_dots stmt_dots
 464       | Ast.ERRORWORDS(exps) -> multibind (List.map expression exps) in
 465     topfn all_functions k t
 466
 467   and anything a =
 468     let k = function
 469         (*in many cases below, the thing is not even mcode, so we do nothing*)
 470         Ast.FullTypeTag(ft) -> fullType ft
 471       | Ast.BaseTypeTag(bt) -> option_default
 472       | Ast.StructUnionTag(su) -> option_default
 473       | Ast.SignTag(sgn) -> option_default
 474       | Ast.IdentTag(id) -> ident id
 475       | Ast.ExpressionTag(exp) -> expression exp
 476       | Ast.ConstantTag(cst) -> option_default
 477       | Ast.UnaryOpTag(unop) -> option_default
 478       | Ast.AssignOpTag(asgnop) -> option_default
 479       | Ast.FixOpTag(fixop) -> option_default
 480       | Ast.BinaryOpTag(binop) -> option_default
 481       | Ast.ArithOpTag(arithop) -> option_default
 482       | Ast.LogicalOpTag(logop) -> option_default
 483       | Ast.DeclarationTag(decl) -> declaration decl
 484       | Ast.InitTag(ini) -> initialiser ini
 485       | Ast.StorageTag(stg) -> option_default
 486       | Ast.IncFileTag(stg) -> option_default
 487       | Ast.Rule_elemTag(rule) -> rule_elem rule
 488       | Ast.StatementTag(rule) -> statement rule
 489       | Ast.CaseLineTag(case) -> case_line case
 490       | Ast.ConstVolTag(cv) -> option_default
 491       | Ast.Token(tok,info) -> option_default
 492       | Ast.Pragma(str) -> option_default
 493       | Ast.Code(cd) -> top_level cd
 494       | Ast.ExprDotsTag(ed) -> expression_dots ed
 495       | Ast.ParamDotsTag(pd) -> parameter_dots pd
 496       | Ast.StmtDotsTag(sd) -> statement_dots sd
 497       | Ast.DeclDotsTag(sd) -> declaration_dots sd
 498       | Ast.TypeCTag(ty) -> typeC ty
 499       | Ast.ParamTag(param) -> parameterTypeDef param
 500       | Ast.SgrepStartTag(tok) -> option_default
 501       | Ast.SgrepEndTag(tok) -> option_default in
 502     anyfn all_functions k a
 503
 504   and all_functions =
 505     {combiner_ident = ident;
 506       combiner_expression = expression;
 507       combiner_fullType = fullType;
 508       combiner_typeC = typeC;
 509       combiner_declaration = declaration;
 510       combiner_initialiser = initialiser;
 511       combiner_parameter = parameterTypeDef;
 512       combiner_parameter_list = parameter_dots;
 513       combiner_rule_elem = rule_elem;
 514       combiner_statement = statement;
 515       combiner_case_line = case_line;
 516       combiner_top_level = top_level;
 517       combiner_anything = anything;
 518       combiner_expression_dots = expression_dots;
 519       combiner_statement_dots = statement_dots;
 520       combiner_declaration_dots = declaration_dots} in
 521   all_functions
 522
 523 (* ---------------------------------------------------------------------- *)
 524
 525 type 'a inout = 'a -> 'a (* for specifying the type of rebuilder *)
 526
 527 type rebuilder =
 528     {rebuilder_ident : Ast.ident inout;
 529       rebuilder_expression : Ast.expression inout;
 530       rebuilder_fullType : Ast.fullType inout;
 531       rebuilder_typeC : Ast.typeC inout;
 532       rebuilder_declaration : Ast.declaration inout;
 533       rebuilder_initialiser : Ast.initialiser inout;
 534       rebuilder_parameter : Ast.parameterTypeDef inout;
 535       rebuilder_parameter_list : Ast.parameter_list inout;
 536       rebuilder_statement : Ast.statement inout;
 537       rebuilder_case_line : Ast.case_line inout;
 538       rebuilder_rule_elem : Ast.rule_elem inout;
 539       rebuilder_top_level : Ast.top_level inout;
 540       rebuilder_expression_dots : Ast.expression Ast.dots inout;
 541       rebuilder_statement_dots : Ast.statement Ast.dots inout;
 542       rebuilder_declaration_dots : Ast.declaration Ast.dots inout;
 543       rebuilder_define_param_dots : Ast.define_param Ast.dots inout;
 544       rebuilder_define_param : Ast.define_param inout;
 545       rebuilder_define_parameters : Ast.define_parameters inout;
 546       rebuilder_anything : Ast.anything inout}
 547
 548 type 'mc rmcode = 'mc Ast.mcode inout
 549 type 'cd rcode = rebuilder -> ('cd inout) -> 'cd inout
 550
 551
 552 let rebuilder
 553     meta_mcode string_mcode const_mcode assign_mcode fix_mcode unary_mcode
 554     binary_mcode cv_mcode sign_mcode struct_mcode storage_mcode
 555     inc_file_mcode
 556     expdotsfn paramdotsfn stmtdotsfn decldotsfn
 557     identfn exprfn ftfn tyfn initfn paramfn declfn rulefn stmtfn casefn
 558     topfn anyfn =
 559   let get_option f = function
 560       Some x -> Some (f x)
 561     | None -> None in
 562   let rec expression_dots d =
 563     let k d =
 564       Ast.rewrap d
 565         (match Ast.unwrap d with
 566           Ast.DOTS(l) -> Ast.DOTS(List.map expression l)
 567         | Ast.CIRCLES(l) -> Ast.CIRCLES(List.map expression l)
 568         | Ast.STARS(l) -> Ast.STARS(List.map expression l)) in
 569     expdotsfn all_functions k d
 570
 571   and parameter_dots d =
 572     let k d =
 573       Ast.rewrap d
 574         (match Ast.unwrap d with
 575           Ast.DOTS(l) -> Ast.DOTS(List.map parameterTypeDef l)
 576         | Ast.CIRCLES(l) -> Ast.CIRCLES(List.map parameterTypeDef l)
 577         | Ast.STARS(l) -> Ast.STARS(List.map parameterTypeDef l)) in
 578     paramdotsfn all_functions k d
 579
 580   and statement_dots d =
 581     let k d =
 582       Ast.rewrap d
 583         (match Ast.unwrap d with
 584           Ast.DOTS(l) -> Ast.DOTS(List.map statement l)
 585         | Ast.CIRCLES(l) -> Ast.CIRCLES(List.map statement l)
 586         | Ast.STARS(l) -> Ast.STARS(List.map statement l)) in
 587     stmtdotsfn all_functions k d
 588
 589   and declaration_dots d =
 590     let k d =
 591       Ast.rewrap d
 592         (match Ast.unwrap d with
 593           Ast.DOTS(l) -> Ast.DOTS(List.map declaration l)
 594         | Ast.CIRCLES(l) -> Ast.CIRCLES(List.map declaration l)
 595         | Ast.STARS(l) -> Ast.STARS(List.map declaration l)) in
 596     decldotsfn all_functions k d
 597
 598   and ident i =
 599     let k i =
 600       Ast.rewrap i
 601         (match Ast.unwrap i with
 602           Ast.Id(name) -> Ast.Id(string_mcode name)
 603         | Ast.MetaId(name,constraints,keep,inherited) ->
 604             Ast.MetaId(meta_mcode name,constraints,keep,inherited)
 605         | Ast.MetaFunc(name,constraints,keep,inherited) ->
 606             Ast.MetaFunc(meta_mcode name,constraints,keep,inherited)
 607         | Ast.MetaLocalFunc(name,constraints,keep,inherited) ->
 608             Ast.MetaLocalFunc(meta_mcode name,constraints,keep,inherited)
 609         | Ast.OptIdent(id) -> Ast.OptIdent(ident id)
 610         | Ast.UniqueIdent(id) -> Ast.UniqueIdent(ident id)) in
 611     identfn all_functions k i
 612
 613   and expression e =
 614     let k e =
 615       Ast.rewrap e
 616         (match Ast.unwrap e with
 617           Ast.Ident(id) -> Ast.Ident(ident id)
 618         | Ast.Constant(const) -> Ast.Constant(const_mcode const)
 619         | Ast.FunCall(fn,lp,args,rp) ->
 620             Ast.FunCall(expression fn, string_mcode lp, expression_dots args,
 621                         string_mcode rp)
 622         | Ast.Assignment(left,op,right,simple) ->
 623             Ast.Assignment(expression left, assign_mcode op, expression right,
 624                            simple)
 625         | Ast.CondExpr(exp1,why,exp2,colon,exp3) ->
 626             Ast.CondExpr(expression exp1, string_mcode why,
 627                          get_option expression exp2, string_mcode colon,
 628                          expression exp3)
 629         | Ast.Postfix(exp,op) -> Ast.Postfix(expression exp,fix_mcode op)
 630         | Ast.Infix(exp,op) -> Ast.Infix(expression exp,fix_mcode op)
 631         | Ast.Unary(exp,op) -> Ast.Unary(expression exp,unary_mcode op)
 632         | Ast.Binary(left,op,right) ->
 633             Ast.Binary(expression left, binary_mcode op, expression right)
 634         | Ast.Nested(left,op,right) ->
 635             Ast.Nested(expression left, binary_mcode op, expression right)
 636         | Ast.Paren(lp,exp,rp) ->
 637             Ast.Paren(string_mcode lp, expression exp, string_mcode rp)
 638         | Ast.ArrayAccess(exp1,lb,exp2,rb) ->
 639             Ast.ArrayAccess(expression exp1, string_mcode lb, expression exp2,
 640                             string_mcode rb)
 641         | Ast.RecordAccess(exp,pt,field) ->
 642             Ast.RecordAccess(expression exp, string_mcode pt, ident field)
 643         | Ast.RecordPtAccess(exp,ar,field) ->
 644             Ast.RecordPtAccess(expression exp, string_mcode ar, ident field)
 645         | Ast.Cast(lp,ty,rp,exp) ->
 646             Ast.Cast(string_mcode lp, fullType ty, string_mcode rp,
 647                      expression exp)
 648         | Ast.SizeOfExpr(szf,exp) ->
 649             Ast.SizeOfExpr(string_mcode szf, expression exp)
 650         | Ast.SizeOfType(szf,lp,ty,rp) ->
 651             Ast.SizeOfType(string_mcode szf,string_mcode lp, fullType ty,
 652                            string_mcode rp)
 653         | Ast.TypeExp(ty) -> Ast.TypeExp(fullType ty)
 654         | Ast.MetaErr(name,constraints,keep,inherited) ->
 655             Ast.MetaErr(meta_mcode name,constraints,keep,inherited)
 656         | Ast.MetaExpr(name,constraints,keep,ty,form,inherited) ->
 657             Ast.MetaExpr(meta_mcode name,constraints,keep,ty,form,inherited)
 658         | Ast.MetaExprList(name,lenname_inh,keep,inherited) ->
 659             Ast.MetaExprList(meta_mcode name,lenname_inh,keep,inherited)
 660         | Ast.EComma(cm) -> Ast.EComma(string_mcode cm)
 661         | Ast.DisjExpr(exp_list) -> Ast.DisjExpr(List.map expression exp_list)
 662         | Ast.NestExpr(starter,expr_dots,ender,whencode,multi) ->
 663             Ast.NestExpr(string_mcode starter,expression_dots expr_dots,
 664                          string_mcode ender,
 665                          get_option expression whencode,multi)
 666         | Ast.Edots(dots,whencode) ->
 667             Ast.Edots(string_mcode dots,get_option expression whencode)
 668         | Ast.Ecircles(dots,whencode) ->
 669             Ast.Ecircles(string_mcode dots,get_option expression whencode)
 670         | Ast.Estars(dots,whencode) ->
 671             Ast.Estars(string_mcode dots,get_option expression whencode)
 672         | Ast.OptExp(exp) -> Ast.OptExp(expression exp)
 673         | Ast.UniqueExp(exp) -> Ast.UniqueExp(expression exp)) in
 674     exprfn all_functions k e
 675
 676   and fullType ft =
 677     let k ft =
 678       Ast.rewrap ft
 679         (match Ast.unwrap ft with
 680           Ast.Type(cv,ty) -> Ast.Type (get_option cv_mcode cv, typeC ty)
 681         | Ast.DisjType(types) -> Ast.DisjType(List.map fullType types)
 682         | Ast.OptType(ty) -> Ast.OptType(fullType ty)
 683         | Ast.UniqueType(ty) -> Ast.UniqueType(fullType ty)) in
 684     ftfn all_functions k ft
 685
 686   and typeC ty =
 687     let k ty =
 688       Ast.rewrap ty
 689         (match Ast.unwrap ty with
 690           Ast.BaseType(ty,strings) ->
 691             Ast.BaseType (ty, List.map string_mcode strings)
 692         | Ast.SignedT(sgn,ty) ->
 693             Ast.SignedT(sign_mcode sgn,get_option typeC ty)
 694         | Ast.Pointer(ty,star) ->
 695             Ast.Pointer (fullType ty, string_mcode star)
 696         | Ast.FunctionPointer(ty,lp1,star,rp1,lp2,params,rp2) ->
 697             Ast.FunctionPointer(fullType ty,string_mcode lp1,string_mcode star,
 698                                 string_mcode rp1,string_mcode lp2,
 699                                 parameter_dots params,
 700                                 string_mcode rp2)
 701         | Ast.FunctionType(allminus,ty,lp,params,rp) ->
 702             Ast.FunctionType(allminus,get_option fullType ty,string_mcode lp,
 703                              parameter_dots params,string_mcode rp)
 704         | Ast.Array(ty,lb,size,rb) ->
 705             Ast.Array(fullType ty, string_mcode lb,
 706                       get_option expression size, string_mcode rb)
 707         | Ast.EnumName(kind,name) ->
 708             Ast.EnumName(string_mcode kind, ident name)
 709         | Ast.StructUnionName(kind,name) ->
 710             Ast.StructUnionName (struct_mcode kind, get_option ident name)
 711         | Ast.StructUnionDef(ty,lb,decls,rb) ->
 712             Ast.StructUnionDef (fullType ty,
 713                                 string_mcode lb, declaration_dots decls,
 714                                 string_mcode rb)
 715         | Ast.TypeName(name) -> Ast.TypeName(string_mcode name)
 716         | Ast.MetaType(name,keep,inherited) ->
 717             Ast.MetaType(meta_mcode name,keep,inherited)) in
 718     tyfn all_functions k ty
 719
 720   and declaration d =
 721     let k d =
 722       Ast.rewrap d
 723         (match Ast.unwrap d with
 724           Ast.MetaDecl(name,keep,inherited) ->
 725             Ast.MetaDecl(meta_mcode name,keep,inherited)
 726         | Ast.MetaField(name,keep,inherited) ->
 727             Ast.MetaField(meta_mcode name,keep,inherited)
 728         | Ast.Init(stg,ty,id,eq,ini,sem) ->
 729             Ast.Init(get_option storage_mcode stg, fullType ty, ident id,
 730                      string_mcode eq, initialiser ini, string_mcode sem)
 731         | Ast.UnInit(stg,ty,id,sem) ->
 732             Ast.UnInit(get_option storage_mcode stg, fullType ty, ident id,
 733                        string_mcode sem)
 734         | Ast.MacroDecl(name,lp,args,rp,sem) ->
 735             Ast.MacroDecl(ident name, string_mcode lp, expression_dots args,
 736                           string_mcode rp,string_mcode sem)
 737         | Ast.TyDecl(ty,sem) -> Ast.TyDecl(fullType ty, string_mcode sem)
 738         | Ast.Typedef(stg,ty,id,sem) ->
 739             Ast.Typedef(string_mcode stg, fullType ty, typeC id,
 740                         string_mcode sem)
 741         | Ast.DisjDecl(decls) -> Ast.DisjDecl(List.map declaration decls)
 742         | Ast.Ddots(dots,whencode) ->
 743             Ast.Ddots(string_mcode dots, get_option declaration whencode)
 744         | Ast.OptDecl(decl) -> Ast.OptDecl(declaration decl)
 745         | Ast.UniqueDecl(decl) -> Ast.UniqueDecl(declaration decl)) in
 746     declfn all_functions k d
 747
 748   and initialiser i =
 749     let k i =
 750       Ast.rewrap i
 751         (match Ast.unwrap i with
 752           Ast.MetaInit(name,keep,inherited) ->
 753             Ast.MetaInit(meta_mcode name,keep,inherited)
 754         | Ast.InitExpr(exp) -> Ast.InitExpr(expression exp)
 755         | Ast.InitList(allminus,lb,initlist,rb,whencode) ->
 756             Ast.InitList(allminus,
 757                          string_mcode lb, List.map initialiser initlist,
 758                          string_mcode rb, List.map initialiser whencode)
 759         | Ast.InitGccName(name,eq,ini) ->
 760             Ast.InitGccName(ident name, string_mcode eq, initialiser ini)
 761         | Ast.InitGccExt(designators,eq,ini) ->
 762             Ast.InitGccExt
 763               (List.map designator designators, string_mcode eq,
 764                initialiser ini)
 765         | Ast.IComma(cm) -> Ast.IComma(string_mcode cm)
 766         | Ast.OptIni(i) -> Ast.OptIni(initialiser i)
 767         | Ast.UniqueIni(i) -> Ast.UniqueIni(initialiser i)) in
 768     initfn all_functions k i
 769
 770   and designator = function
 771       Ast.DesignatorField(dot,id) ->
 772         Ast.DesignatorField(string_mcode dot,ident id)
 773     | Ast.DesignatorIndex(lb,exp,rb) ->
 774         Ast.DesignatorIndex(string_mcode lb,expression exp,string_mcode rb)
 775     | Ast.DesignatorRange(lb,min,dots,max,rb) ->
 776         Ast.DesignatorRange(string_mcode lb,expression min,string_mcode dots,
 777                              expression max,string_mcode rb)
 778
 779   and parameterTypeDef p =
 780     let k p =
 781       Ast.rewrap p
 782         (match Ast.unwrap p with
 783           Ast.VoidParam(ty) -> Ast.VoidParam(fullType ty)
 784         | Ast.Param(ty,id) -> Ast.Param(fullType ty, get_option ident id)
 785         | Ast.MetaParam(name,keep,inherited) ->
 786             Ast.MetaParam(meta_mcode name,keep,inherited)
 787         | Ast.MetaParamList(name,lenname_inh,keep,inherited) ->
 788             Ast.MetaParamList(meta_mcode name,lenname_inh,keep,inherited)
 789         | Ast.PComma(cm) -> Ast.PComma(string_mcode cm)
 790         | Ast.Pdots(dots) -> Ast.Pdots(string_mcode dots)
 791         | Ast.Pcircles(dots) -> Ast.Pcircles(string_mcode dots)
 792         | Ast.OptParam(param) -> Ast.OptParam(parameterTypeDef param)
 793         | Ast.UniqueParam(param) -> Ast.UniqueParam(parameterTypeDef param)) in
 794     paramfn all_functions k p
 795
 796   and rule_elem re =
 797     let k re =
 798       Ast.rewrap re
 799         (match Ast.unwrap re with
 800           Ast.FunHeader(bef,allminus,fi,name,lp,params,rp) ->
 801             Ast.FunHeader(bef,allminus,List.map fninfo fi,ident name,
 802                           string_mcode lp, parameter_dots params,
 803                           string_mcode rp)
 804         | Ast.Decl(bef,allminus,decl) ->
 805             Ast.Decl(bef,allminus,declaration decl)
 806         | Ast.SeqStart(brace) -> Ast.SeqStart(string_mcode brace)
 807         | Ast.SeqEnd(brace) -> Ast.SeqEnd(string_mcode brace)
 808         | Ast.ExprStatement(exp,sem) ->
 809             Ast.ExprStatement (expression exp, string_mcode sem)
 810         | Ast.IfHeader(iff,lp,exp,rp) ->
 811             Ast.IfHeader(string_mcode iff, string_mcode lp, expression exp,
 812               string_mcode rp)
 813         | Ast.Else(els) -> Ast.Else(string_mcode els)
 814         | Ast.WhileHeader(whl,lp,exp,rp) ->
 815             Ast.WhileHeader(string_mcode whl, string_mcode lp, expression exp,
 816                             string_mcode rp)
 817         | Ast.DoHeader(d) -> Ast.DoHeader(string_mcode d)
 818         | Ast.WhileTail(whl,lp,exp,rp,sem) ->
 819             Ast.WhileTail(string_mcode whl, string_mcode lp, expression exp,
 820                           string_mcode rp, string_mcode sem)
 821         | Ast.ForHeader(fr,lp,e1,sem1,e2,sem2,e3,rp) ->
 822             Ast.ForHeader(string_mcode fr, string_mcode lp,
 823                           get_option expression e1, string_mcode sem1,
 824                           get_option expression e2, string_mcode sem2,
 825                           get_option expression e3, string_mcode rp)
 826         | Ast.IteratorHeader(whl,lp,args,rp) ->
 827             Ast.IteratorHeader(ident whl, string_mcode lp,
 828                                expression_dots args, string_mcode rp)
 829         | Ast.SwitchHeader(switch,lp,exp,rp) ->
 830             Ast.SwitchHeader(string_mcode switch, string_mcode lp,
 831                              expression exp, string_mcode rp)
 832         | Ast.Break(br,sem) ->
 833             Ast.Break(string_mcode br, string_mcode sem)
 834         | Ast.Continue(cont,sem) ->
 835             Ast.Continue(string_mcode cont, string_mcode sem)
 836         | Ast.Label(l,dd) -> Ast.Label(ident l, string_mcode dd)
 837         | Ast.Goto(goto,l,sem) ->
 838             Ast.Goto(string_mcode goto,ident l,string_mcode sem)
 839         | Ast.Return(ret,sem) ->
 840             Ast.Return(string_mcode ret, string_mcode sem)
 841         | Ast.ReturnExpr(ret,exp,sem) ->
 842             Ast.ReturnExpr(string_mcode ret, expression exp, string_mcode sem)
 843         | Ast.MetaStmt(name,keep,seqible,inherited) ->
 844             Ast.MetaStmt(meta_mcode name,keep,seqible,inherited)
 845         | Ast.MetaStmtList(name,keep,inherited) ->
 846             Ast.MetaStmtList(meta_mcode name,keep,inherited)
 847         | Ast.MetaRuleElem(name,keep,inherited) ->
 848             Ast.MetaRuleElem(meta_mcode name,keep,inherited)
 849         | Ast.Exp(exp) -> Ast.Exp(expression exp)
 850         | Ast.TopExp(exp) -> Ast.TopExp(expression exp)
 851         | Ast.Ty(ty) -> Ast.Ty(fullType ty)
 852         | Ast.TopInit(init) -> Ast.TopInit(initialiser init)
 853         | Ast.Include(inc,name) ->
 854             Ast.Include(string_mcode inc,inc_file_mcode name)
 855         | Ast.DefineHeader(def,id,params) ->
 856             Ast.DefineHeader(string_mcode def,ident id,
 857                              define_parameters params)
 858         | Ast.Default(def,colon) ->
 859             Ast.Default(string_mcode def,string_mcode colon)
 860         | Ast.Case(case,exp,colon) ->
 861             Ast.Case(string_mcode case,expression exp,string_mcode colon)
 862         | Ast.DisjRuleElem(res) -> Ast.DisjRuleElem(List.map rule_elem res)) in
 863     rulefn all_functions k re
 864
 865   (* not parameterizable for now... *)
 866   and define_parameters p =
 867     let k p =
 868       Ast.rewrap p
 869         (match Ast.unwrap p with
 870           Ast.NoParams -> Ast.NoParams
 871         | Ast.DParams(lp,params,rp) ->
 872             Ast.DParams(string_mcode lp,define_param_dots params,
 873                         string_mcode rp)) in
 874     k p
 875
 876   and define_param_dots d =
 877     let k d =
 878       Ast.rewrap d
 879         (match Ast.unwrap d with
 880           Ast.DOTS(l) -> Ast.DOTS(List.map define_param l)
 881         | Ast.CIRCLES(l) -> Ast.CIRCLES(List.map define_param l)
 882         | Ast.STARS(l) -> Ast.STARS(List.map define_param l)) in
 883     k d
 884
 885   and define_param p =
 886     let k p =
 887       Ast.rewrap p
 888         (match Ast.unwrap p with
 889           Ast.DParam(id) -> Ast.DParam(ident id)
 890         | Ast.DPComma(comma) -> Ast.DPComma(string_mcode comma)
 891         | Ast.DPdots(d) -> Ast.DPdots(string_mcode d)
 892         | Ast.DPcircles(c) -> Ast.DPcircles(string_mcode c)
 893         | Ast.OptDParam(dp) -> Ast.OptDParam(define_param dp)
 894         | Ast.UniqueDParam(dp) -> Ast.UniqueDParam(define_param dp)) in
 895     k p
 896
 897   and process_bef_aft s =
 898     Ast.set_dots_bef_aft
 899       (match Ast.get_dots_bef_aft s with
 900         Ast.NoDots -> Ast.NoDots
 901       | Ast.DroppingBetweenDots(stm,ind) ->
 902           Ast.DroppingBetweenDots(statement stm,ind)
 903       | Ast.AddingBetweenDots(stm,ind) ->
 904           Ast.AddingBetweenDots(statement stm,ind))
 905       s
 906
 907   and statement s =
 908     let k s =
 909       Ast.rewrap s
 910         (match Ast.unwrap s with
 911           Ast.Seq(lbrace,body,rbrace) ->
 912             Ast.Seq(rule_elem lbrace,
 913                     statement_dots body, rule_elem rbrace)
 914         | Ast.IfThen(header,branch,aft) ->
 915             Ast.IfThen(rule_elem header, statement branch,aft)
 916         | Ast.IfThenElse(header,branch1,els,branch2,aft) ->
 917             Ast.IfThenElse(rule_elem header, statement branch1, rule_elem els,
 918                            statement branch2, aft)
 919         | Ast.While(header,body,aft) ->
 920             Ast.While(rule_elem header, statement body, aft)
 921         | Ast.Do(header,body,tail) ->
 922             Ast.Do(rule_elem header, statement body, rule_elem tail)
 923         | Ast.For(header,body,aft) ->
 924             Ast.For(rule_elem header, statement body, aft)
 925         | Ast.Iterator(header,body,aft) ->
 926             Ast.Iterator(rule_elem header, statement body, aft)
 927         | Ast.Switch(header,lb,decls,cases,rb) ->
 928             Ast.Switch(rule_elem header,rule_elem lb,
 929                        statement_dots decls,
 930                        List.map case_line cases,rule_elem rb)
 931         | Ast.Atomic(re) -> Ast.Atomic(rule_elem re)
 932         | Ast.Disj(stmt_dots_list) ->
 933             Ast.Disj (List.map statement_dots stmt_dots_list)
 934         | Ast.Nest(starter,stmt_dots,ender,whn,multi,bef,aft) ->
 935             Ast.Nest(string_mcode starter,statement_dots stmt_dots,
 936                      string_mcode ender,
 937                      List.map (whencode statement_dots statement) whn,
 938                      multi,bef,aft)
 939         | Ast.FunDecl(header,lbrace,body,rbrace) ->
 940             Ast.FunDecl(rule_elem header,rule_elem lbrace,
 941                         statement_dots body, rule_elem rbrace)
 942         | Ast.Define(header,body) ->
 943             Ast.Define(rule_elem header,statement_dots body)
 944         | Ast.Dots(d,whn,bef,aft) ->
 945             Ast.Dots(string_mcode d,
 946                      List.map (whencode statement_dots statement) whn,bef,aft)
 947         | Ast.Circles(d,whn,bef,aft) ->
 948             Ast.Circles(string_mcode d,
 949                         List.map (whencode statement_dots statement) whn,
 950                         bef,aft)
 951         | Ast.Stars(d,whn,bef,aft) ->
 952             Ast.Stars(string_mcode d,
 953                       List.map (whencode statement_dots statement) whn,bef,aft)
 954         | Ast.OptStm(stmt) -> Ast.OptStm(statement stmt)
 955         | Ast.UniqueStm(stmt) -> Ast.UniqueStm(statement stmt)) in
 956     let s = stmtfn all_functions k s in
 957     (* better to do this after, in case there is an equality test on the whole
 958        statement, eg in free_vars.  equality test would require that this
 959        subterm not already be changed *)
 960     process_bef_aft s
 961
 962   and fninfo = function
 963       Ast.FStorage(stg) -> Ast.FStorage(storage_mcode stg)
 964     | Ast.FType(ty) -> Ast.FType(fullType ty)
 965     | Ast.FInline(inline) -> Ast.FInline(string_mcode inline)
 966     | Ast.FAttr(attr) -> Ast.FAttr(string_mcode attr)
 967
 968   and whencode notfn alwaysfn = function
 969       Ast.WhenNot a -> Ast.WhenNot (notfn a)
 970     | Ast.WhenAlways a -> Ast.WhenAlways (alwaysfn a)
 971     | Ast.WhenModifier(x)    -> Ast.WhenModifier(x)
 972     | Ast.WhenNotTrue(e) -> Ast.WhenNotTrue(rule_elem e)
 973     | Ast.WhenNotFalse(e) -> Ast.WhenNotFalse(rule_elem e)
 974
 975   and case_line c =
 976     let k c =
 977       Ast.rewrap c
 978         (match Ast.unwrap c with
 979           Ast.CaseLine(header,code) ->
 980             Ast.CaseLine(rule_elem header,statement_dots code)
 981         | Ast.OptCase(case) -> Ast.OptCase(case_line case)) in
 982     casefn all_functions k c
 983
 984   and top_level t =
 985     let k t =
 986       Ast.rewrap t
 987         (match Ast.unwrap t with
 988           Ast.FILEINFO(old_file,new_file) ->
 989             Ast.FILEINFO (string_mcode old_file, string_mcode new_file)
 990         | Ast.DECL(stmt) -> Ast.DECL(statement stmt)
 991         | Ast.CODE(stmt_dots) -> Ast.CODE(statement_dots stmt_dots)
 992         | Ast.ERRORWORDS(exps) -> Ast.ERRORWORDS (List.map expression exps)) in
 993     topfn all_functions k t
 994
 995   and anything a =
 996     let k = function
 997         (*in many cases below, the thing is not even mcode, so we do nothing*)
 998         Ast.FullTypeTag(ft) -> Ast.FullTypeTag(fullType ft)
 999       | Ast.BaseTypeTag(bt) as x -> x
1000       | Ast.StructUnionTag(su) as x -> x
1001       | Ast.SignTag(sgn) as x -> x
1002       | Ast.IdentTag(id) -> Ast.IdentTag(ident id)
1003       | Ast.ExpressionTag(exp) -> Ast.ExpressionTag(expression exp)
1004       | Ast.ConstantTag(cst) as x -> x
1005       | Ast.UnaryOpTag(unop) as x -> x
1006       | Ast.AssignOpTag(asgnop) as x -> x
1007       | Ast.FixOpTag(fixop) as x -> x
1008       | Ast.BinaryOpTag(binop) as x -> x
1009       | Ast.ArithOpTag(arithop) as x -> x
1010       | Ast.LogicalOpTag(logop) as x -> x
1011       | Ast.InitTag(decl) -> Ast.InitTag(initialiser decl)
1012       | Ast.DeclarationTag(decl) -> Ast.DeclarationTag(declaration decl)
1013       | Ast.StorageTag(stg) as x -> x
1014       | Ast.IncFileTag(stg) as x -> x
1015       | Ast.Rule_elemTag(rule) -> Ast.Rule_elemTag(rule_elem rule)
1016       | Ast.StatementTag(rule) -> Ast.StatementTag(statement rule)
1017       | Ast.CaseLineTag(case) -> Ast.CaseLineTag(case_line case)
1018       | Ast.ConstVolTag(cv) as x -> x
1019       | Ast.Token(tok,info) as x -> x
1020       | Ast.Pragma(str) as x -> x
1021       | Ast.Code(cd) -> Ast.Code(top_level cd)
1022       | Ast.ExprDotsTag(ed) -> Ast.ExprDotsTag(expression_dots ed)
1023       | Ast.ParamDotsTag(pd) -> Ast.ParamDotsTag(parameter_dots pd)
1024       | Ast.StmtDotsTag(sd) -> Ast.StmtDotsTag(statement_dots sd)
1025       | Ast.DeclDotsTag(sd) -> Ast.DeclDotsTag(declaration_dots sd)
1026       | Ast.TypeCTag(ty) -> Ast.TypeCTag(typeC ty)
1027       | Ast.ParamTag(param) -> Ast.ParamTag(parameterTypeDef param)
1028       | Ast.SgrepStartTag(tok) as x -> x
1029       | Ast.SgrepEndTag(tok) as x -> x in
1030     anyfn all_functions k a
1031
1032   and all_functions =
1033     {rebuilder_ident = ident;
1034       rebuilder_expression = expression;
1035       rebuilder_fullType = fullType;
1036       rebuilder_typeC = typeC;
1037       rebuilder_declaration = declaration;
1038       rebuilder_initialiser = initialiser;
1039       rebuilder_parameter = parameterTypeDef;
1040       rebuilder_parameter_list = parameter_dots;
1041       rebuilder_rule_elem = rule_elem;
1042       rebuilder_statement = statement;
1043       rebuilder_case_line = case_line;
1044       rebuilder_top_level = top_level;
1045       rebuilder_expression_dots = expression_dots;
1046       rebuilder_statement_dots = statement_dots;
1047       rebuilder_declaration_dots = declaration_dots;
1048       rebuilder_define_param_dots = define_param_dots;
1049       rebuilder_define_param = define_param;
1050       rebuilder_define_parameters = define_parameters;
1051       rebuilder_anything = anything} in
1052   all_functions
1053