parsing_cocci/visitor_ast.ml

   1 (*
   2  * Copyright 2010, INRIA, University of Copenhagen
   3  * Julia Lawall, Rene Rydhof Hansen, Gilles Muller, Nicolas Palix
   4  * Copyright 2005-2009, Ecole des Mines de Nantes, University of Copenhagen
   5  * Yoann Padioleau, Julia Lawall, Rene Rydhof Hansen, Henrik Stuart, Gilles Muller, Nicolas Palix
   6  * This file is part of Coccinelle.
   7  *
   8  * Coccinelle is free software: you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation, according to version 2 of the License.
  11  *
  12  * Coccinelle is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with Coccinelle.  If not, see <http://www.gnu.org/licenses/>.
  19  *
  20  * The authors reserve the right to distribute this or future versions of
  21  * Coccinelle under other licenses.
  22  *)
  23
  24
  25 module Ast0 = Ast0_cocci
  26 module Ast = Ast_cocci
  27
  28 (* --------------------------------------------------------------------- *)
  29 (* Generic traversal: combiner *)
  30 (* parameters:
  31    combining function
  32    treatment of: mcode, identifiers, expressions, fullTypes, types,
  33    declarations, statements, toplevels
  34    default value for options *)
  35
  36 type 'a combiner =
  37     {combiner_ident : Ast.ident -> 'a;
  38      combiner_expression : Ast.expression -> 'a;
  39      combiner_fullType : Ast.fullType -> 'a;
  40      combiner_typeC : Ast.typeC -> 'a;
  41      combiner_declaration : Ast.declaration -> 'a;
  42      combiner_initialiser : Ast.initialiser -> 'a;
  43      combiner_parameter : Ast.parameterTypeDef -> 'a;
  44      combiner_parameter_list : Ast.parameter_list -> 'a;
  45      combiner_rule_elem : Ast.rule_elem -> 'a;
  46      combiner_statement : Ast.statement -> 'a;
  47      combiner_case_line : Ast.case_line -> 'a;
  48      combiner_top_level : Ast.top_level -> 'a;
  49      combiner_anything : Ast.anything  -> 'a;
  50      combiner_expression_dots : Ast.expression Ast.dots -> 'a;
  51      combiner_statement_dots : Ast.statement Ast.dots -> 'a;
  52      combiner_declaration_dots : Ast.declaration Ast.dots -> 'a;
  53      combiner_initialiser_dots : Ast.initialiser Ast.dots -> 'a}
  54
  55 type ('mc,'a) cmcode = 'a combiner -> 'mc Ast_cocci.mcode -> 'a
  56 type ('cd,'a) ccode = 'a combiner -> ('cd -> 'a) -> 'cd -> 'a
  57
  58
  59 let combiner bind option_default
  60     meta_mcodefn string_mcodefn const_mcodefn assign_mcodefn fix_mcodefn
  61     unary_mcodefn binary_mcodefn
  62     cv_mcodefn sign_mcodefn struct_mcodefn storage_mcodefn
  63     inc_file_mcodefn
  64     expdotsfn paramdotsfn stmtdotsfn decldotsfn initdotsfn
  65     identfn exprfn ftfn tyfn initfn paramfn declfn rulefn stmtfn casefn
  66     topfn anyfn =
  67   let multibind l =
  68     let rec loop = function
  69         [] -> option_default
  70       | [x] -> x
  71       | x::xs -> bind x (loop xs) in
  72     loop l in
  73   let get_option f = function
  74       Some x -> f x
  75     | None -> option_default in
  76
  77   let dotsfn param default all_functions arg =
  78     let k d =
  79       match Ast.unwrap d with
  80         Ast.DOTS(l) | Ast.CIRCLES(l) | Ast.STARS(l) ->
  81           multibind (List.map default l) in
  82     param all_functions k arg in
  83
  84   let rec meta_mcode x = meta_mcodefn all_functions x
  85   and string_mcode x = string_mcodefn all_functions x
  86   and const_mcode x = const_mcodefn all_functions x
  87   and assign_mcode x = assign_mcodefn all_functions x
  88   and fix_mcode x = fix_mcodefn all_functions x
  89   and unary_mcode x = unary_mcodefn all_functions x
  90   and binary_mcode x = binary_mcodefn all_functions x
  91   and cv_mcode x = cv_mcodefn all_functions x
  92   and sign_mcode x = sign_mcodefn all_functions x
  93   and struct_mcode x = struct_mcodefn all_functions x
  94   and storage_mcode x = storage_mcodefn all_functions x
  95   and inc_file_mcode x = inc_file_mcodefn all_functions x
  96
  97   and expression_dots d = dotsfn expdotsfn expression all_functions d
  98   and parameter_dots d = dotsfn paramdotsfn parameterTypeDef all_functions d
  99   and statement_dots d = dotsfn stmtdotsfn statement all_functions d
 100   and declaration_dots d = dotsfn decldotsfn declaration all_functions d
 101   and initialiser_dots d = dotsfn initdotsfn initialiser all_functions d
 102
 103   and ident i =
 104     let k i =
 105       match Ast.unwrap i with
 106         Ast.Id(name) -> string_mcode name
 107       | Ast.MetaId(name,_,_,_) -> meta_mcode name
 108       | Ast.MetaFunc(name,_,_,_) -> meta_mcode name
 109       | Ast.MetaLocalFunc(name,_,_,_) -> meta_mcode name
 110       | Ast.DisjId(id_list) -> multibind (List.map ident id_list)
 111       | Ast.OptIdent(id) -> ident id
 112       | Ast.UniqueIdent(id) -> ident id in
 113     identfn all_functions k i
 114
 115   and expression e =
 116     let k e =
 117       match Ast.unwrap e with
 118         Ast.Ident(id) -> ident id
 119       | Ast.Constant(const) -> const_mcode const
 120       | Ast.FunCall(fn,lp,args,rp) ->
 121           multibind [expression fn; string_mcode lp; expression_dots args;
 122                       string_mcode rp]
 123       | Ast.Assignment(left,op,right,simple) ->
 124           multibind [expression left; assign_mcode op; expression right]
 125       | Ast.CondExpr(exp1,why,exp2,colon,exp3) ->
 126           multibind [expression exp1; string_mcode why;
 127                       get_option expression exp2; string_mcode colon;
 128                       expression exp3]
 129       | Ast.Postfix(exp,op) -> bind (expression exp) (fix_mcode op)
 130       | Ast.Infix(exp,op) -> bind (fix_mcode op) (expression exp)
 131       | Ast.Unary(exp,op) -> bind (unary_mcode op) (expression exp)
 132       | Ast.Binary(left,op,right) ->
 133           multibind [expression left; binary_mcode op; expression right]
 134       | Ast.Nested(left,op,right) ->
 135           multibind [expression left; binary_mcode op; expression right]
 136       | Ast.Paren(lp,exp,rp) ->
 137           multibind [string_mcode lp; expression exp; string_mcode rp]
 138       | Ast.ArrayAccess(exp1,lb,exp2,rb) ->
 139           multibind
 140             [expression exp1; string_mcode lb; expression exp2;
 141               string_mcode rb]
 142       | Ast.RecordAccess(exp,pt,field) ->
 143           multibind [expression exp; string_mcode pt; ident field]
 144       | Ast.RecordPtAccess(exp,ar,field) ->
 145           multibind [expression exp; string_mcode ar; ident field]
 146       | Ast.Cast(lp,ty,rp,exp) ->
 147           multibind
 148             [string_mcode lp; fullType ty; string_mcode rp; expression exp]
 149       | Ast.SizeOfExpr(szf,exp) ->
 150           multibind [string_mcode szf; expression exp]
 151       | Ast.SizeOfType(szf,lp,ty,rp) ->
 152           multibind
 153             [string_mcode szf; string_mcode lp; fullType ty; string_mcode rp]
 154       | Ast.TypeExp(ty) -> fullType ty
 155       | Ast.Constructor(lp,ty,rp,init) ->
 156           multibind
 157             [string_mcode lp; fullType ty; string_mcode rp; initialiser init]
 158       | Ast.MetaErr(name,_,_,_)
 159       | Ast.MetaExpr(name,_,_,_,_,_)
 160       | Ast.MetaExprList(name,_,_,_) -> meta_mcode name
 161       | Ast.EComma(cm) -> string_mcode cm
 162       | Ast.DisjExpr(exp_list) -> multibind (List.map expression exp_list)
 163       | Ast.NestExpr(starter,expr_dots,ender,whencode,multi) ->
 164           bind (string_mcode starter)
 165             (bind (expression_dots expr_dots)
 166                (bind (string_mcode ender)
 167                   (get_option expression whencode)))
 168       | Ast.Edots(dots,whencode) | Ast.Ecircles(dots,whencode)
 169       | Ast.Estars(dots,whencode) ->
 170           bind (string_mcode dots) (get_option expression whencode)
 171       | Ast.OptExp(exp) | Ast.UniqueExp(exp) ->
 172           expression exp in
 173     exprfn all_functions k e
 174
 175   and fullType ft =
 176     let k ft =
 177       match Ast.unwrap ft with
 178         Ast.Type(cv,ty) -> bind (get_option cv_mcode cv) (typeC ty)
 179       | Ast.DisjType(types) -> multibind (List.map fullType types)
 180       | Ast.OptType(ty) -> fullType ty
 181       | Ast.UniqueType(ty) -> fullType ty in
 182     ftfn all_functions k ft
 183
 184   and function_pointer (ty,lp1,star,rp1,lp2,params,rp2) extra =
 185     (* have to put the treatment of the identifier into the right position *)
 186     multibind
 187       ([fullType ty; string_mcode lp1; string_mcode star] @ extra @
 188        [string_mcode rp1;
 189          string_mcode lp2; parameter_dots params; string_mcode rp2])
 190
 191   and function_type (ty,lp1,params,rp1) extra =
 192     (* have to put the treatment of the identifier into the right position *)
 193     multibind
 194       ([get_option fullType ty] @ extra @
 195        [string_mcode lp1; parameter_dots params; string_mcode rp1])
 196
 197   and array_type (ty,lb,size,rb) extra =
 198     multibind
 199       ([fullType ty] @ extra @
 200        [string_mcode lb; get_option expression size; string_mcode rb])
 201
 202   and typeC ty =
 203     let k ty =
 204       match Ast.unwrap ty with
 205         Ast.BaseType(ty,strings) -> multibind (List.map string_mcode strings)
 206       | Ast.SignedT(sgn,ty) -> bind (sign_mcode sgn) (get_option typeC ty)
 207       | Ast.Pointer(ty,star) ->
 208           bind (fullType ty) (string_mcode star)
 209       | Ast.FunctionPointer(ty,lp1,star,rp1,lp2,params,rp2) ->
 210           function_pointer (ty,lp1,star,rp1,lp2,params,rp2) []
 211       | Ast.FunctionType (_,ty,lp1,params,rp1) ->
 212           function_type (ty,lp1,params,rp1) []
 213       | Ast.Array(ty,lb,size,rb) -> array_type (ty,lb,size,rb) []
 214       | Ast.EnumName(kind,name) ->
 215           bind (string_mcode kind) (get_option ident name)
 216       | Ast.EnumDef(ty,lb,ids,rb) ->
 217           multibind
 218             [fullType ty; string_mcode lb; expression_dots ids;
 219               string_mcode rb]
 220       | Ast.StructUnionName(kind,name) ->
 221           bind (struct_mcode kind) (get_option ident name)
 222       | Ast.StructUnionDef(ty,lb,decls,rb) ->
 223           multibind
 224             [fullType ty; string_mcode lb; declaration_dots decls;
 225               string_mcode rb]
 226       | Ast.TypeName(name) -> string_mcode name
 227       | Ast.MetaType(name,_,_) -> meta_mcode name in
 228     tyfn all_functions k ty
 229
 230   and named_type ty id =
 231     match Ast.unwrap ty with
 232       Ast.Type(None,ty1) ->
 233         (match Ast.unwrap ty1 with
 234           Ast.FunctionPointer(ty,lp1,star,rp1,lp2,params,rp2) ->
 235             function_pointer (ty,lp1,star,rp1,lp2,params,rp2) [ident id]
 236         | Ast.FunctionType(_,ty,lp1,params,rp1) ->
 237             function_type (ty,lp1,params,rp1) [ident id]
 238         | Ast.Array(ty,lb,size,rb) -> array_type (ty,lb,size,rb) [ident id]
 239         | _ -> bind (fullType ty) (ident id))
 240     | _ -> bind (fullType ty) (ident id)
 241
 242   and declaration d =
 243     let k d =
 244       match Ast.unwrap d with
 245         Ast.MetaDecl(name,_,_) | Ast.MetaField(name,_,_)
 246       | Ast.MetaFieldList(name,_,_,_) ->
 247           meta_mcode name
 248       | Ast.Init(stg,ty,id,eq,ini,sem) ->
 249           bind (get_option storage_mcode stg)
 250             (bind (named_type ty id)
 251                (multibind
 252                   [string_mcode eq; initialiser ini; string_mcode sem]))
 253       | Ast.UnInit(stg,ty,id,sem) ->
 254           bind (get_option storage_mcode stg)
 255             (bind (named_type ty id) (string_mcode sem))
 256       | Ast.MacroDecl(name,lp,args,rp,sem) ->
 257           multibind
 258             [ident name; string_mcode lp; expression_dots args;
 259               string_mcode rp; string_mcode sem]
 260       | Ast.TyDecl(ty,sem) -> bind (fullType ty) (string_mcode sem)
 261       | Ast.Typedef(stg,ty,id,sem) ->
 262           bind (string_mcode stg)
 263             (bind (fullType ty) (bind (typeC id) (string_mcode sem)))
 264       | Ast.DisjDecl(decls) -> multibind (List.map declaration decls)
 265       | Ast.Ddots(dots,whencode) ->
 266           bind (string_mcode dots) (get_option declaration whencode)
 267       | Ast.OptDecl(decl) -> declaration decl
 268       | Ast.UniqueDecl(decl) -> declaration decl in
 269     declfn all_functions k d
 270
 271   and initialiser i =
 272     let k i =
 273       match Ast.unwrap i with
 274         Ast.MetaInit(name,_,_) -> meta_mcode name
 275       | Ast.MetaInitList(name,_,_,_) -> meta_mcode name
 276       | Ast.InitExpr(exp) -> expression exp
 277       | Ast.ArInitList(lb,initlist,rb) ->
 278           multibind
 279             [string_mcode lb; initialiser_dots initlist; string_mcode rb]
 280       | Ast.StrInitList(allminus,lb,initlist,rb,whencode) ->
 281           multibind
 282             [string_mcode lb;
 283               multibind (List.map initialiser initlist);
 284               string_mcode rb;
 285               multibind (List.map initialiser whencode)]
 286       | Ast.InitGccName(name,eq,ini) ->
 287           multibind [ident name; string_mcode eq; initialiser ini]
 288       | Ast.InitGccExt(designators,eq,ini) ->
 289           multibind
 290             ((List.map designator designators) @
 291              [string_mcode eq; initialiser ini])
 292       | Ast.IComma(cm) -> string_mcode cm
 293       | Ast.Idots(dots,whencode) ->
 294           bind (string_mcode dots) (get_option initialiser whencode)
 295       | Ast.OptIni(i) -> initialiser i
 296       | Ast.UniqueIni(i) -> initialiser i in
 297     initfn all_functions k i
 298
 299   and designator = function
 300       Ast.DesignatorField(dot,id) -> bind (string_mcode dot) (ident id)
 301     | Ast.DesignatorIndex(lb,exp,rb) ->
 302         bind (string_mcode lb) (bind (expression exp) (string_mcode rb))
 303     | Ast.DesignatorRange(lb,min,dots,max,rb) ->
 304         multibind
 305           [string_mcode lb; expression min; string_mcode dots;
 306             expression max; string_mcode rb]
 307
 308   and parameterTypeDef p =
 309     let k p =
 310       match Ast.unwrap p with
 311         Ast.VoidParam(ty) -> fullType ty
 312       | Ast.Param(ty,Some id) -> named_type ty id
 313       | Ast.Param(ty,None) -> fullType ty
 314       | Ast.MetaParam(name,_,_) -> meta_mcode name
 315       | Ast.MetaParamList(name,_,_,_) -> meta_mcode name
 316       | Ast.PComma(cm) -> string_mcode cm
 317       | Ast.Pdots(dots) -> string_mcode dots
 318       | Ast.Pcircles(dots) -> string_mcode dots
 319       | Ast.OptParam(param) -> parameterTypeDef param
 320       | Ast.UniqueParam(param) -> parameterTypeDef param in
 321     paramfn all_functions k p
 322
 323   and rule_elem re =
 324     let k re =
 325       match Ast.unwrap re with
 326         Ast.FunHeader(_,_,fi,name,lp,params,rp) ->
 327           multibind
 328             ((List.map fninfo fi) @
 329              [ident name;string_mcode lp;parameter_dots params;
 330                string_mcode rp])
 331       | Ast.Decl(_,_,decl) -> declaration decl
 332       | Ast.SeqStart(brace) -> string_mcode brace
 333       | Ast.SeqEnd(brace) -> string_mcode brace
 334       | Ast.ExprStatement(exp,sem) ->
 335           bind (get_option expression exp) (string_mcode sem)
 336       | Ast.IfHeader(iff,lp,exp,rp) ->
 337           multibind [string_mcode iff; string_mcode lp; expression exp;
 338                       string_mcode rp]
 339       | Ast.Else(els) -> string_mcode els
 340       | Ast.WhileHeader(whl,lp,exp,rp) ->
 341           multibind [string_mcode whl; string_mcode lp; expression exp;
 342                       string_mcode rp]
 343       | Ast.DoHeader(d) -> string_mcode d
 344       | Ast.WhileTail(whl,lp,exp,rp,sem) ->
 345           multibind [string_mcode whl; string_mcode lp; expression exp;
 346                       string_mcode rp; string_mcode sem]
 347       | Ast.ForHeader(fr,lp,e1,sem1,e2,sem2,e3,rp) ->
 348           multibind [string_mcode fr; string_mcode lp;
 349                       get_option expression e1; string_mcode sem1;
 350                       get_option expression e2; string_mcode sem2;
 351                       get_option expression e3; string_mcode rp]
 352       | Ast.IteratorHeader(nm,lp,args,rp) ->
 353           multibind [ident nm; string_mcode lp;
 354                       expression_dots args; string_mcode rp]
 355       | Ast.SwitchHeader(switch,lp,exp,rp) ->
 356           multibind [string_mcode switch; string_mcode lp; expression exp;
 357                       string_mcode rp]
 358       | Ast.Break(br,sem) -> bind (string_mcode br) (string_mcode sem)
 359       | Ast.Continue(cont,sem) -> bind (string_mcode cont) (string_mcode sem)
 360       | Ast.Label(l,dd) -> bind (ident l) (string_mcode dd)
 361       | Ast.Goto(goto,l,sem) ->
 362           bind (string_mcode goto) (bind (ident l) (string_mcode sem))
 363       | Ast.Return(ret,sem) -> bind (string_mcode ret) (string_mcode sem)
 364       | Ast.ReturnExpr(ret,exp,sem) ->
 365           multibind [string_mcode ret; expression exp; string_mcode sem]
 366       | Ast.MetaStmt(name,_,_,_) -> meta_mcode name
 367       | Ast.MetaStmtList(name,_,_) -> meta_mcode name
 368       | Ast.MetaRuleElem(name,_,_) -> meta_mcode name
 369       | Ast.Exp(exp) -> expression exp
 370       | Ast.TopExp(exp) -> expression exp
 371       | Ast.Ty(ty) -> fullType ty
 372       | Ast.TopInit(init) -> initialiser init
 373       | Ast.Include(inc,name) -> bind (string_mcode inc) (inc_file_mcode name)
 374       | Ast.Undef(def,id) ->
 375           multibind [string_mcode def; ident id]
 376       | Ast.DefineHeader(def,id,params) ->
 377           multibind [string_mcode def; ident id; define_parameters params]
 378       | Ast.Default(def,colon) -> bind (string_mcode def) (string_mcode colon)
 379       | Ast.Case(case,exp,colon) ->
 380           multibind [string_mcode case; expression exp; string_mcode colon]
 381       | Ast.DisjRuleElem(res) -> multibind (List.map rule_elem res) in
 382     rulefn all_functions k re
 383
 384   (* not parameterizable for now... *)
 385   and define_parameters p =
 386     let k p =
 387       match Ast.unwrap p with
 388         Ast.NoParams -> option_default
 389       | Ast.DParams(lp,params,rp) ->
 390           multibind
 391             [string_mcode lp; define_param_dots params; string_mcode rp] in
 392     k p
 393
 394   and define_param_dots d =
 395     let k d =
 396       match Ast.unwrap d with
 397         Ast.DOTS(l) | Ast.CIRCLES(l) | Ast.STARS(l) ->
 398           multibind (List.map define_param l) in
 399     k d
 400
 401   and define_param p =
 402     let k p =
 403       match Ast.unwrap p with
 404         Ast.DParam(id) -> ident id
 405       | Ast.DPComma(comma) -> string_mcode comma
 406       | Ast.DPdots(d) -> string_mcode d
 407       | Ast.DPcircles(c) -> string_mcode c
 408       | Ast.OptDParam(dp) -> define_param dp
 409       | Ast.UniqueDParam(dp) -> define_param dp in
 410     k p
 411
 412   (* discard the result, because the statement is assumed to be already
 413      represented elsewhere in the code *)
 414   and process_bef_aft s =
 415     match Ast.get_dots_bef_aft s with
 416       Ast.NoDots -> ()
 417     | Ast.DroppingBetweenDots(stm,ind) -> let _ = statement stm in ()
 418     | Ast.AddingBetweenDots(stm,ind) -> let _ = statement stm in ()
 419
 420   and statement s =
 421     process_bef_aft s;
 422     let k s =
 423       match Ast.unwrap s with
 424         Ast.Seq(lbrace,body,rbrace) ->
 425           multibind [rule_elem lbrace;
 426                       statement_dots body; rule_elem rbrace]
 427       | Ast.IfThen(header,branch,_) ->
 428           multibind [rule_elem header; statement branch]
 429       | Ast.IfThenElse(header,branch1,els,branch2,_) ->
 430           multibind [rule_elem header; statement branch1; rule_elem els;
 431                       statement branch2]
 432       | Ast.While(header,body,_) ->
 433           multibind [rule_elem header; statement body]
 434       | Ast.Do(header,body,tail) ->
 435           multibind [rule_elem header; statement body; rule_elem tail]
 436       | Ast.For(header,body,_) -> multibind [rule_elem header; statement body]
 437       | Ast.Iterator(header,body,_) ->
 438           multibind [rule_elem header; statement body]
 439       | Ast.Switch(header,lb,decls,cases,rb) ->
 440           multibind [rule_elem header;rule_elem lb;
 441                       statement_dots decls;
 442                       multibind (List.map case_line cases);
 443                       rule_elem rb]
 444       | Ast.Atomic(re) -> rule_elem re
 445       | Ast.Disj(stmt_dots_list) ->
 446           multibind (List.map statement_dots stmt_dots_list)
 447       | Ast.Nest(starter,stmt_dots,ender,whn,_,_,_) ->
 448           bind (string_mcode starter)
 449             (bind (statement_dots stmt_dots)
 450                (bind (string_mcode ender)
 451                   (multibind
 452                      (List.map (whencode statement_dots statement) whn))))
 453       | Ast.FunDecl(header,lbrace,body,rbrace) ->
 454           multibind [rule_elem header; rule_elem lbrace;
 455                       statement_dots body; rule_elem rbrace]
 456       | Ast.Define(header,body) ->
 457           bind (rule_elem header) (statement_dots body)
 458       | Ast.Dots(d,whn,_,_) | Ast.Circles(d,whn,_,_) | Ast.Stars(d,whn,_,_) ->
 459           bind (string_mcode d)
 460             (multibind (List.map (whencode statement_dots statement) whn))
 461       | Ast.OptStm(stmt) | Ast.UniqueStm(stmt) ->
 462           statement stmt in
 463     stmtfn all_functions k s
 464
 465   and fninfo = function
 466       Ast.FStorage(stg) -> storage_mcode stg
 467     | Ast.FType(ty) -> fullType ty
 468     | Ast.FInline(inline) -> string_mcode inline
 469     | Ast.FAttr(attr) -> string_mcode attr
 470
 471   and whencode notfn alwaysfn = function
 472       Ast.WhenNot a -> notfn a
 473     | Ast.WhenAlways a -> alwaysfn a
 474     | Ast.WhenModifier(_) -> option_default
 475     | Ast.WhenNotTrue(e) -> rule_elem e
 476     | Ast.WhenNotFalse(e) -> rule_elem e
 477
 478   and case_line c =
 479     let k c =
 480       match Ast.unwrap c with
 481         Ast.CaseLine(header,code) ->
 482           bind (rule_elem header) (statement_dots code)
 483       | Ast.OptCase(case) -> case_line case in
 484     casefn all_functions k c
 485
 486   and top_level t =
 487     let k t =
 488       match Ast.unwrap t with
 489         Ast.FILEINFO(old_file,new_file) ->
 490           bind (string_mcode old_file) (string_mcode new_file)
 491       | Ast.NONDECL(stmt) -> statement stmt
 492       | Ast.CODE(stmt_dots) -> statement_dots stmt_dots
 493       | Ast.ERRORWORDS(exps) -> multibind (List.map expression exps) in
 494     topfn all_functions k t
 495
 496   and anything a =
 497     let k = function
 498         (*in many cases below, the thing is not even mcode, so we do nothing*)
 499         Ast.FullTypeTag(ft) -> fullType ft
 500       | Ast.BaseTypeTag(bt) -> option_default
 501       | Ast.StructUnionTag(su) -> option_default
 502       | Ast.SignTag(sgn) -> option_default
 503       | Ast.IdentTag(id) -> ident id
 504       | Ast.ExpressionTag(exp) -> expression exp
 505       | Ast.ConstantTag(cst) -> option_default
 506       | Ast.UnaryOpTag(unop) -> option_default
 507       | Ast.AssignOpTag(asgnop) -> option_default
 508       | Ast.FixOpTag(fixop) -> option_default
 509       | Ast.BinaryOpTag(binop) -> option_default
 510       | Ast.ArithOpTag(arithop) -> option_default
 511       | Ast.LogicalOpTag(logop) -> option_default
 512       | Ast.DeclarationTag(decl) -> declaration decl
 513       | Ast.InitTag(ini) -> initialiser ini
 514       | Ast.StorageTag(stg) -> option_default
 515       | Ast.IncFileTag(stg) -> option_default
 516       | Ast.Rule_elemTag(rule) -> rule_elem rule
 517       | Ast.StatementTag(rule) -> statement rule
 518       | Ast.CaseLineTag(case) -> case_line case
 519       | Ast.ConstVolTag(cv) -> option_default
 520       | Ast.Token(tok,info) -> option_default
 521       | Ast.Pragma(str) -> option_default
 522       | Ast.Code(cd) -> top_level cd
 523       | Ast.ExprDotsTag(ed) -> expression_dots ed
 524       | Ast.ParamDotsTag(pd) -> parameter_dots pd
 525       | Ast.StmtDotsTag(sd) -> statement_dots sd
 526       | Ast.DeclDotsTag(sd) -> declaration_dots sd
 527       | Ast.TypeCTag(ty) -> typeC ty
 528       | Ast.ParamTag(param) -> parameterTypeDef param
 529       | Ast.SgrepStartTag(tok) -> option_default
 530       | Ast.SgrepEndTag(tok) -> option_default in
 531     anyfn all_functions k a
 532
 533   and all_functions =
 534     {combiner_ident = ident;
 535       combiner_expression = expression;
 536       combiner_fullType = fullType;
 537       combiner_typeC = typeC;
 538       combiner_declaration = declaration;
 539       combiner_initialiser = initialiser;
 540       combiner_parameter = parameterTypeDef;
 541       combiner_parameter_list = parameter_dots;
 542       combiner_rule_elem = rule_elem;
 543       combiner_statement = statement;
 544       combiner_case_line = case_line;
 545       combiner_top_level = top_level;
 546       combiner_anything = anything;
 547       combiner_expression_dots = expression_dots;
 548       combiner_statement_dots = statement_dots;
 549       combiner_declaration_dots = declaration_dots;
 550       combiner_initialiser_dots = initialiser_dots} in
 551   all_functions
 552
 553 (* ---------------------------------------------------------------------- *)
 554
 555 type 'a inout = 'a -> 'a (* for specifying the type of rebuilder *)
 556
 557 type rebuilder =
 558     {rebuilder_ident : Ast.ident inout;
 559       rebuilder_expression : Ast.expression inout;
 560       rebuilder_fullType : Ast.fullType inout;
 561       rebuilder_typeC : Ast.typeC inout;
 562       rebuilder_declaration : Ast.declaration inout;
 563       rebuilder_initialiser : Ast.initialiser inout;
 564       rebuilder_parameter : Ast.parameterTypeDef inout;
 565       rebuilder_parameter_list : Ast.parameter_list inout;
 566       rebuilder_statement : Ast.statement inout;
 567       rebuilder_case_line : Ast.case_line inout;
 568       rebuilder_rule_elem : Ast.rule_elem inout;
 569       rebuilder_top_level : Ast.top_level inout;
 570       rebuilder_expression_dots : Ast.expression Ast.dots inout;
 571       rebuilder_statement_dots : Ast.statement Ast.dots inout;
 572       rebuilder_declaration_dots : Ast.declaration Ast.dots inout;
 573       rebuilder_initialiser_dots : Ast.initialiser Ast.dots inout;
 574       rebuilder_define_param_dots : Ast.define_param Ast.dots inout;
 575       rebuilder_define_param : Ast.define_param inout;
 576       rebuilder_define_parameters : Ast.define_parameters inout;
 577       rebuilder_anything : Ast.anything inout}
 578
 579 type 'mc rmcode = 'mc Ast.mcode inout
 580 type 'cd rcode = rebuilder -> ('cd inout) -> 'cd inout
 581
 582
 583 let rebuilder
 584     meta_mcode string_mcode const_mcode assign_mcode fix_mcode unary_mcode
 585     binary_mcode cv_mcode sign_mcode struct_mcode storage_mcode
 586     inc_file_mcode
 587     expdotsfn paramdotsfn stmtdotsfn decldotsfn initdotsfn
 588     identfn exprfn ftfn tyfn initfn paramfn declfn rulefn stmtfn casefn
 589     topfn anyfn =
 590   let get_option f = function
 591       Some x -> Some (f x)
 592     | None -> None in
 593
 594   let dotsfn param default all_functions arg =
 595     let k d =
 596       Ast.rewrap d
 597         (match Ast.unwrap d with
 598           Ast.DOTS(l) -> Ast.DOTS(List.map default l)
 599         | Ast.CIRCLES(l) -> Ast.CIRCLES(List.map default l)
 600         | Ast.STARS(l) -> Ast.STARS(List.map default l)) in
 601     param all_functions k arg in
 602
 603   let rec expression_dots d = dotsfn expdotsfn expression all_functions d
 604   and parameter_dots d = dotsfn paramdotsfn parameterTypeDef all_functions d
 605   and statement_dots d = dotsfn stmtdotsfn statement all_functions d
 606   and declaration_dots d = dotsfn decldotsfn declaration all_functions d
 607   and initialiser_dots d = dotsfn initdotsfn initialiser all_functions d
 608
 609   and ident i =
 610     let k i =
 611       Ast.rewrap i
 612         (match Ast.unwrap i with
 613           Ast.Id(name) -> Ast.Id(string_mcode name)
 614         | Ast.MetaId(name,constraints,keep,inherited) ->
 615             Ast.MetaId(meta_mcode name,constraints,keep,inherited)
 616         | Ast.MetaFunc(name,constraints,keep,inherited) ->
 617             Ast.MetaFunc(meta_mcode name,constraints,keep,inherited)
 618         | Ast.MetaLocalFunc(name,constraints,keep,inherited) ->
 619             Ast.MetaLocalFunc(meta_mcode name,constraints,keep,inherited)
 620         | Ast.DisjId(id_list) -> Ast.DisjId(List.map ident id_list)
 621         | Ast.OptIdent(id) -> Ast.OptIdent(ident id)
 622         | Ast.UniqueIdent(id) -> Ast.UniqueIdent(ident id)) in
 623     identfn all_functions k i
 624
 625   and expression e =
 626     let k e =
 627       Ast.rewrap e
 628         (match Ast.unwrap e with
 629           Ast.Ident(id) -> Ast.Ident(ident id)
 630         | Ast.Constant(const) -> Ast.Constant(const_mcode const)
 631         | Ast.FunCall(fn,lp,args,rp) ->
 632             Ast.FunCall(expression fn, string_mcode lp, expression_dots args,
 633                         string_mcode rp)
 634         | Ast.Assignment(left,op,right,simple) ->
 635             Ast.Assignment(expression left, assign_mcode op, expression right,
 636                            simple)
 637         | Ast.CondExpr(exp1,why,exp2,colon,exp3) ->
 638             Ast.CondExpr(expression exp1, string_mcode why,
 639                          get_option expression exp2, string_mcode colon,
 640                          expression exp3)
 641         | Ast.Postfix(exp,op) -> Ast.Postfix(expression exp,fix_mcode op)
 642         | Ast.Infix(exp,op) -> Ast.Infix(expression exp,fix_mcode op)
 643         | Ast.Unary(exp,op) -> Ast.Unary(expression exp,unary_mcode op)
 644         | Ast.Binary(left,op,right) ->
 645             Ast.Binary(expression left, binary_mcode op, expression right)
 646         | Ast.Nested(left,op,right) ->
 647             Ast.Nested(expression left, binary_mcode op, expression right)
 648         | Ast.Paren(lp,exp,rp) ->
 649             Ast.Paren(string_mcode lp, expression exp, string_mcode rp)
 650         | Ast.ArrayAccess(exp1,lb,exp2,rb) ->
 651             Ast.ArrayAccess(expression exp1, string_mcode lb, expression exp2,
 652                             string_mcode rb)
 653         | Ast.RecordAccess(exp,pt,field) ->
 654             Ast.RecordAccess(expression exp, string_mcode pt, ident field)
 655         | Ast.RecordPtAccess(exp,ar,field) ->
 656             Ast.RecordPtAccess(expression exp, string_mcode ar, ident field)
 657         | Ast.Cast(lp,ty,rp,exp) ->
 658             Ast.Cast(string_mcode lp, fullType ty, string_mcode rp,
 659                      expression exp)
 660         | Ast.SizeOfExpr(szf,exp) ->
 661             Ast.SizeOfExpr(string_mcode szf, expression exp)
 662         | Ast.SizeOfType(szf,lp,ty,rp) ->
 663             Ast.SizeOfType(string_mcode szf,string_mcode lp, fullType ty,
 664                            string_mcode rp)
 665         | Ast.TypeExp(ty) -> Ast.TypeExp(fullType ty)
 666         | Ast.Constructor(lp,ty,rp,init) ->
 667             Ast.Constructor(string_mcode lp, fullType ty, string_mcode rp,
 668                      initialiser init)
 669         | Ast.MetaErr(name,constraints,keep,inherited) ->
 670             Ast.MetaErr(meta_mcode name,constraints,keep,inherited)
 671         | Ast.MetaExpr(name,constraints,keep,ty,form,inherited) ->
 672             Ast.MetaExpr(meta_mcode name,constraints,keep,ty,form,inherited)
 673         | Ast.MetaExprList(name,lenname_inh,keep,inherited) ->
 674             Ast.MetaExprList(meta_mcode name,lenname_inh,keep,inherited)
 675         | Ast.EComma(cm) -> Ast.EComma(string_mcode cm)
 676         | Ast.DisjExpr(exp_list) -> Ast.DisjExpr(List.map expression exp_list)
 677         | Ast.NestExpr(starter,expr_dots,ender,whencode,multi) ->
 678             Ast.NestExpr(string_mcode starter,expression_dots expr_dots,
 679                          string_mcode ender,
 680                          get_option expression whencode,multi)
 681         | Ast.Edots(dots,whencode) ->
 682             Ast.Edots(string_mcode dots,get_option expression whencode)
 683         | Ast.Ecircles(dots,whencode) ->
 684             Ast.Ecircles(string_mcode dots,get_option expression whencode)
 685         | Ast.Estars(dots,whencode) ->
 686             Ast.Estars(string_mcode dots,get_option expression whencode)
 687         | Ast.OptExp(exp) -> Ast.OptExp(expression exp)
 688         | Ast.UniqueExp(exp) -> Ast.UniqueExp(expression exp)) in
 689     exprfn all_functions k e
 690
 691   and fullType ft =
 692     let k ft =
 693       Ast.rewrap ft
 694         (match Ast.unwrap ft with
 695           Ast.Type(cv,ty) -> Ast.Type (get_option cv_mcode cv, typeC ty)
 696         | Ast.DisjType(types) -> Ast.DisjType(List.map fullType types)
 697         | Ast.OptType(ty) -> Ast.OptType(fullType ty)
 698         | Ast.UniqueType(ty) -> Ast.UniqueType(fullType ty)) in
 699     ftfn all_functions k ft
 700
 701   and typeC ty =
 702     let k ty =
 703       Ast.rewrap ty
 704         (match Ast.unwrap ty with
 705           Ast.BaseType(ty,strings) ->
 706             Ast.BaseType (ty, List.map string_mcode strings)
 707         | Ast.SignedT(sgn,ty) ->
 708             Ast.SignedT(sign_mcode sgn,get_option typeC ty)
 709         | Ast.Pointer(ty,star) ->
 710             Ast.Pointer (fullType ty, string_mcode star)
 711         | Ast.FunctionPointer(ty,lp1,star,rp1,lp2,params,rp2) ->
 712             Ast.FunctionPointer(fullType ty,string_mcode lp1,string_mcode star,
 713                                 string_mcode rp1,string_mcode lp2,
 714                                 parameter_dots params,
 715                                 string_mcode rp2)
 716         | Ast.FunctionType(allminus,ty,lp,params,rp) ->
 717             Ast.FunctionType(allminus,get_option fullType ty,string_mcode lp,
 718                              parameter_dots params,string_mcode rp)
 719         | Ast.Array(ty,lb,size,rb) ->
 720             Ast.Array(fullType ty, string_mcode lb,
 721                       get_option expression size, string_mcode rb)
 722         | Ast.EnumName(kind,name) ->
 723             Ast.EnumName(string_mcode kind, get_option ident name)
 724         | Ast.EnumDef(ty,lb,ids,rb) ->
 725             Ast.EnumDef (fullType ty, string_mcode lb, expression_dots ids,
 726                          string_mcode rb)
 727         | Ast.StructUnionName(kind,name) ->
 728             Ast.StructUnionName (struct_mcode kind, get_option ident name)
 729         | Ast.StructUnionDef(ty,lb,decls,rb) ->
 730             Ast.StructUnionDef (fullType ty,
 731                                 string_mcode lb, declaration_dots decls,
 732                                 string_mcode rb)
 733         | Ast.TypeName(name) -> Ast.TypeName(string_mcode name)
 734         | Ast.MetaType(name,keep,inherited) ->
 735             Ast.MetaType(meta_mcode name,keep,inherited)) in
 736     tyfn all_functions k ty
 737
 738   and declaration d =
 739     let k d =
 740       Ast.rewrap d
 741         (match Ast.unwrap d with
 742           Ast.MetaDecl(name,keep,inherited) ->
 743             Ast.MetaDecl(meta_mcode name,keep,inherited)
 744         | Ast.MetaField(name,keep,inherited) ->
 745             Ast.MetaField(meta_mcode name,keep,inherited)
 746         | Ast.MetaFieldList(name,lenname_inh,keep,inherited) ->
 747             Ast.MetaFieldList(meta_mcode name,lenname_inh,keep,inherited)
 748         | Ast.Init(stg,ty,id,eq,ini,sem) ->
 749             Ast.Init(get_option storage_mcode stg, fullType ty, ident id,
 750                      string_mcode eq, initialiser ini, string_mcode sem)
 751         | Ast.UnInit(stg,ty,id,sem) ->
 752             Ast.UnInit(get_option storage_mcode stg, fullType ty, ident id,
 753                        string_mcode sem)
 754         | Ast.MacroDecl(name,lp,args,rp,sem) ->
 755             Ast.MacroDecl(ident name, string_mcode lp, expression_dots args,
 756                           string_mcode rp,string_mcode sem)
 757         | Ast.TyDecl(ty,sem) -> Ast.TyDecl(fullType ty, string_mcode sem)
 758         | Ast.Typedef(stg,ty,id,sem) ->
 759             Ast.Typedef(string_mcode stg, fullType ty, typeC id,
 760                         string_mcode sem)
 761         | Ast.DisjDecl(decls) -> Ast.DisjDecl(List.map declaration decls)
 762         | Ast.Ddots(dots,whencode) ->
 763             Ast.Ddots(string_mcode dots, get_option declaration whencode)
 764         | Ast.OptDecl(decl) -> Ast.OptDecl(declaration decl)
 765         | Ast.UniqueDecl(decl) -> Ast.UniqueDecl(declaration decl)) in
 766     declfn all_functions k d
 767
 768   and initialiser i =
 769     let k i =
 770       Ast.rewrap i
 771         (match Ast.unwrap i with
 772           Ast.MetaInit(name,keep,inherited) ->
 773             Ast.MetaInit(meta_mcode name,keep,inherited)
 774         | Ast.MetaInitList(name,lenname_inh,keep,inherited) ->
 775             Ast.MetaInitList(meta_mcode name,lenname_inh,keep,inherited)
 776         | Ast.InitExpr(exp) -> Ast.InitExpr(expression exp)
 777         | Ast.ArInitList(lb,initlist,rb) ->
 778             Ast.ArInitList(string_mcode lb, initialiser_dots initlist,
 779                            string_mcode rb)
 780         | Ast.StrInitList(allminus,lb,initlist,rb,whencode) ->
 781             Ast.StrInitList(allminus,
 782                          string_mcode lb, List.map initialiser initlist,
 783                          string_mcode rb, List.map initialiser whencode)
 784         | Ast.InitGccName(name,eq,ini) ->
 785             Ast.InitGccName(ident name, string_mcode eq, initialiser ini)
 786         | Ast.InitGccExt(designators,eq,ini) ->
 787             Ast.InitGccExt
 788               (List.map designator designators, string_mcode eq,
 789                initialiser ini)
 790         | Ast.IComma(cm) -> Ast.IComma(string_mcode cm)
 791         | Ast.Idots(dots,whencode) ->
 792             Ast.Idots(string_mcode dots,get_option initialiser whencode)
 793         | Ast.OptIni(i) -> Ast.OptIni(initialiser i)
 794         | Ast.UniqueIni(i) -> Ast.UniqueIni(initialiser i)) in
 795     initfn all_functions k i
 796
 797   and designator = function
 798       Ast.DesignatorField(dot,id) ->
 799         Ast.DesignatorField(string_mcode dot,ident id)
 800     | Ast.DesignatorIndex(lb,exp,rb) ->
 801         Ast.DesignatorIndex(string_mcode lb,expression exp,string_mcode rb)
 802     | Ast.DesignatorRange(lb,min,dots,max,rb) ->
 803         Ast.DesignatorRange(string_mcode lb,expression min,string_mcode dots,
 804                              expression max,string_mcode rb)
 805
 806   and parameterTypeDef p =
 807     let k p =
 808       Ast.rewrap p
 809         (match Ast.unwrap p with
 810           Ast.VoidParam(ty) -> Ast.VoidParam(fullType ty)
 811         | Ast.Param(ty,id) -> Ast.Param(fullType ty, get_option ident id)
 812         | Ast.MetaParam(name,keep,inherited) ->
 813             Ast.MetaParam(meta_mcode name,keep,inherited)
 814         | Ast.MetaParamList(name,lenname_inh,keep,inherited) ->
 815             Ast.MetaParamList(meta_mcode name,lenname_inh,keep,inherited)
 816         | Ast.PComma(cm) -> Ast.PComma(string_mcode cm)
 817         | Ast.Pdots(dots) -> Ast.Pdots(string_mcode dots)
 818         | Ast.Pcircles(dots) -> Ast.Pcircles(string_mcode dots)
 819         | Ast.OptParam(param) -> Ast.OptParam(parameterTypeDef param)
 820         | Ast.UniqueParam(param) -> Ast.UniqueParam(parameterTypeDef param)) in
 821     paramfn all_functions k p
 822
 823   and rule_elem re =
 824     let k re =
 825       Ast.rewrap re
 826         (match Ast.unwrap re with
 827           Ast.FunHeader(bef,allminus,fi,name,lp,params,rp) ->
 828             Ast.FunHeader(bef,allminus,List.map fninfo fi,ident name,
 829                           string_mcode lp, parameter_dots params,
 830                           string_mcode rp)
 831         | Ast.Decl(bef,allminus,decl) ->
 832             Ast.Decl(bef,allminus,declaration decl)
 833         | Ast.SeqStart(brace) -> Ast.SeqStart(string_mcode brace)
 834         | Ast.SeqEnd(brace) -> Ast.SeqEnd(string_mcode brace)
 835         | Ast.ExprStatement(exp,sem) ->
 836             Ast.ExprStatement (get_option expression exp, string_mcode sem)
 837         | Ast.IfHeader(iff,lp,exp,rp) ->
 838             Ast.IfHeader(string_mcode iff, string_mcode lp, expression exp,
 839               string_mcode rp)
 840         | Ast.Else(els) -> Ast.Else(string_mcode els)
 841         | Ast.WhileHeader(whl,lp,exp,rp) ->
 842             Ast.WhileHeader(string_mcode whl, string_mcode lp, expression exp,
 843                             string_mcode rp)
 844         | Ast.DoHeader(d) -> Ast.DoHeader(string_mcode d)
 845         | Ast.WhileTail(whl,lp,exp,rp,sem) ->
 846             Ast.WhileTail(string_mcode whl, string_mcode lp, expression exp,
 847                           string_mcode rp, string_mcode sem)
 848         | Ast.ForHeader(fr,lp,e1,sem1,e2,sem2,e3,rp) ->
 849             Ast.ForHeader(string_mcode fr, string_mcode lp,
 850                           get_option expression e1, string_mcode sem1,
 851                           get_option expression e2, string_mcode sem2,
 852                           get_option expression e3, string_mcode rp)
 853         | Ast.IteratorHeader(whl,lp,args,rp) ->
 854             Ast.IteratorHeader(ident whl, string_mcode lp,
 855                                expression_dots args, string_mcode rp)
 856         | Ast.SwitchHeader(switch,lp,exp,rp) ->
 857             Ast.SwitchHeader(string_mcode switch, string_mcode lp,
 858                              expression exp, string_mcode rp)
 859         | Ast.Break(br,sem) ->
 860             Ast.Break(string_mcode br, string_mcode sem)
 861         | Ast.Continue(cont,sem) ->
 862             Ast.Continue(string_mcode cont, string_mcode sem)
 863         | Ast.Label(l,dd) -> Ast.Label(ident l, string_mcode dd)
 864         | Ast.Goto(goto,l,sem) ->
 865             Ast.Goto(string_mcode goto,ident l,string_mcode sem)
 866         | Ast.Return(ret,sem) ->
 867             Ast.Return(string_mcode ret, string_mcode sem)
 868         | Ast.ReturnExpr(ret,exp,sem) ->
 869             Ast.ReturnExpr(string_mcode ret, expression exp, string_mcode sem)
 870         | Ast.MetaStmt(name,keep,seqible,inherited) ->
 871             Ast.MetaStmt(meta_mcode name,keep,seqible,inherited)
 872         | Ast.MetaStmtList(name,keep,inherited) ->
 873             Ast.MetaStmtList(meta_mcode name,keep,inherited)
 874         | Ast.MetaRuleElem(name,keep,inherited) ->
 875             Ast.MetaRuleElem(meta_mcode name,keep,inherited)
 876         | Ast.Exp(exp) -> Ast.Exp(expression exp)
 877         | Ast.TopExp(exp) -> Ast.TopExp(expression exp)
 878         | Ast.Ty(ty) -> Ast.Ty(fullType ty)
 879         | Ast.TopInit(init) -> Ast.TopInit(initialiser init)
 880         | Ast.Include(inc,name) ->
 881             Ast.Include(string_mcode inc,inc_file_mcode name)
 882         | Ast.Undef(def,id) ->
 883             Ast.Undef(string_mcode def,ident id)
 884         | Ast.DefineHeader(def,id,params) ->
 885             Ast.DefineHeader(string_mcode def,ident id,
 886                              define_parameters params)
 887         | Ast.Default(def,colon) ->
 888             Ast.Default(string_mcode def,string_mcode colon)
 889         | Ast.Case(case,exp,colon) ->
 890             Ast.Case(string_mcode case,expression exp,string_mcode colon)
 891         | Ast.DisjRuleElem(res) -> Ast.DisjRuleElem(List.map rule_elem res)) in
 892     rulefn all_functions k re
 893
 894   (* not parameterizable for now... *)
 895   and define_parameters p =
 896     let k p =
 897       Ast.rewrap p
 898         (match Ast.unwrap p with
 899           Ast.NoParams -> Ast.NoParams
 900         | Ast.DParams(lp,params,rp) ->
 901             Ast.DParams(string_mcode lp,define_param_dots params,
 902                         string_mcode rp)) in
 903     k p
 904
 905   and define_param_dots d =
 906     let k d =
 907       Ast.rewrap d
 908         (match Ast.unwrap d with
 909           Ast.DOTS(l) -> Ast.DOTS(List.map define_param l)
 910         | Ast.CIRCLES(l) -> Ast.CIRCLES(List.map define_param l)
 911         | Ast.STARS(l) -> Ast.STARS(List.map define_param l)) in
 912     k d
 913
 914   and define_param p =
 915     let k p =
 916       Ast.rewrap p
 917         (match Ast.unwrap p with
 918           Ast.DParam(id) -> Ast.DParam(ident id)
 919         | Ast.DPComma(comma) -> Ast.DPComma(string_mcode comma)
 920         | Ast.DPdots(d) -> Ast.DPdots(string_mcode d)
 921         | Ast.DPcircles(c) -> Ast.DPcircles(string_mcode c)
 922         | Ast.OptDParam(dp) -> Ast.OptDParam(define_param dp)
 923         | Ast.UniqueDParam(dp) -> Ast.UniqueDParam(define_param dp)) in
 924     k p
 925
 926   and process_bef_aft s =
 927     Ast.set_dots_bef_aft
 928       (match Ast.get_dots_bef_aft s with
 929         Ast.NoDots -> Ast.NoDots
 930       | Ast.DroppingBetweenDots(stm,ind) ->
 931           Ast.DroppingBetweenDots(statement stm,ind)
 932       | Ast.AddingBetweenDots(stm,ind) ->
 933           Ast.AddingBetweenDots(statement stm,ind))
 934       s
 935
 936   and statement s =
 937     let k s =
 938       Ast.rewrap s
 939         (match Ast.unwrap s with
 940           Ast.Seq(lbrace,body,rbrace) ->
 941             Ast.Seq(rule_elem lbrace,
 942                     statement_dots body, rule_elem rbrace)
 943         | Ast.IfThen(header,branch,aft) ->
 944             Ast.IfThen(rule_elem header, statement branch,aft)
 945         | Ast.IfThenElse(header,branch1,els,branch2,aft) ->
 946             Ast.IfThenElse(rule_elem header, statement branch1, rule_elem els,
 947                            statement branch2, aft)
 948         | Ast.While(header,body,aft) ->
 949             Ast.While(rule_elem header, statement body, aft)
 950         | Ast.Do(header,body,tail) ->
 951             Ast.Do(rule_elem header, statement body, rule_elem tail)
 952         | Ast.For(header,body,aft) ->
 953             Ast.For(rule_elem header, statement body, aft)
 954         | Ast.Iterator(header,body,aft) ->
 955             Ast.Iterator(rule_elem header, statement body, aft)
 956         | Ast.Switch(header,lb,decls,cases,rb) ->
 957             Ast.Switch(rule_elem header,rule_elem lb,
 958                        statement_dots decls,
 959                        List.map case_line cases,rule_elem rb)
 960         | Ast.Atomic(re) -> Ast.Atomic(rule_elem re)
 961         | Ast.Disj(stmt_dots_list) ->
 962             Ast.Disj (List.map statement_dots stmt_dots_list)
 963         | Ast.Nest(starter,stmt_dots,ender,whn,multi,bef,aft) ->
 964             Ast.Nest(string_mcode starter,statement_dots stmt_dots,
 965                      string_mcode ender,
 966                      List.map (whencode statement_dots statement) whn,
 967                      multi,bef,aft)
 968         | Ast.FunDecl(header,lbrace,body,rbrace) ->
 969             Ast.FunDecl(rule_elem header,rule_elem lbrace,
 970                         statement_dots body, rule_elem rbrace)
 971         | Ast.Define(header,body) ->
 972             Ast.Define(rule_elem header,statement_dots body)
 973         | Ast.Dots(d,whn,bef,aft) ->
 974             Ast.Dots(string_mcode d,
 975                      List.map (whencode statement_dots statement) whn,bef,aft)
 976         | Ast.Circles(d,whn,bef,aft) ->
 977             Ast.Circles(string_mcode d,
 978                         List.map (whencode statement_dots statement) whn,
 979                         bef,aft)
 980         | Ast.Stars(d,whn,bef,aft) ->
 981             Ast.Stars(string_mcode d,
 982                       List.map (whencode statement_dots statement) whn,bef,aft)
 983         | Ast.OptStm(stmt) -> Ast.OptStm(statement stmt)
 984         | Ast.UniqueStm(stmt) -> Ast.UniqueStm(statement stmt)) in
 985     let s = stmtfn all_functions k s in
 986     (* better to do this after, in case there is an equality test on the whole
 987        statement, eg in free_vars.  equality test would require that this
 988        subterm not already be changed *)
 989     process_bef_aft s
 990
 991   and fninfo = function
 992       Ast.FStorage(stg) -> Ast.FStorage(storage_mcode stg)
 993     | Ast.FType(ty) -> Ast.FType(fullType ty)
 994     | Ast.FInline(inline) -> Ast.FInline(string_mcode inline)
 995     | Ast.FAttr(attr) -> Ast.FAttr(string_mcode attr)
 996
 997   and whencode notfn alwaysfn = function
 998       Ast.WhenNot a -> Ast.WhenNot (notfn a)
 999     | Ast.WhenAlways a -> Ast.WhenAlways (alwaysfn a)
1000     | Ast.WhenModifier(x)    -> Ast.WhenModifier(x)
1001     | Ast.WhenNotTrue(e) -> Ast.WhenNotTrue(rule_elem e)
1002     | Ast.WhenNotFalse(e) -> Ast.WhenNotFalse(rule_elem e)
1003
1004   and case_line c =
1005     let k c =
1006       Ast.rewrap c
1007         (match Ast.unwrap c with
1008           Ast.CaseLine(header,code) ->
1009             Ast.CaseLine(rule_elem header,statement_dots code)
1010         | Ast.OptCase(case) -> Ast.OptCase(case_line case)) in
1011     casefn all_functions k c
1012
1013   and top_level t =
1014     let k t =
1015       Ast.rewrap t
1016         (match Ast.unwrap t with
1017           Ast.FILEINFO(old_file,new_file) ->
1018             Ast.FILEINFO (string_mcode old_file, string_mcode new_file)
1019         | Ast.NONDECL(stmt) -> Ast.NONDECL(statement stmt)
1020         | Ast.CODE(stmt_dots) -> Ast.CODE(statement_dots stmt_dots)
1021         | Ast.ERRORWORDS(exps) -> Ast.ERRORWORDS (List.map expression exps)) in
1022     topfn all_functions k t
1023
1024   and anything a =
1025     let k = function
1026         (*in many cases below, the thing is not even mcode, so we do nothing*)
1027         Ast.FullTypeTag(ft) -> Ast.FullTypeTag(fullType ft)
1028       | Ast.BaseTypeTag(bt) as x -> x
1029       | Ast.StructUnionTag(su) as x -> x
1030       | Ast.SignTag(sgn) as x -> x
1031       | Ast.IdentTag(id) -> Ast.IdentTag(ident id)
1032       | Ast.ExpressionTag(exp) -> Ast.ExpressionTag(expression exp)
1033       | Ast.ConstantTag(cst) as x -> x
1034       | Ast.UnaryOpTag(unop) as x -> x
1035       | Ast.AssignOpTag(asgnop) as x -> x
1036       | Ast.FixOpTag(fixop) as x -> x
1037       | Ast.BinaryOpTag(binop) as x -> x
1038       | Ast.ArithOpTag(arithop) as x -> x
1039       | Ast.LogicalOpTag(logop) as x -> x
1040       | Ast.InitTag(decl) -> Ast.InitTag(initialiser decl)
1041       | Ast.DeclarationTag(decl) -> Ast.DeclarationTag(declaration decl)
1042       | Ast.StorageTag(stg) as x -> x
1043       | Ast.IncFileTag(stg) as x -> x
1044       | Ast.Rule_elemTag(rule) -> Ast.Rule_elemTag(rule_elem rule)
1045       | Ast.StatementTag(rule) -> Ast.StatementTag(statement rule)
1046       | Ast.CaseLineTag(case) -> Ast.CaseLineTag(case_line case)
1047       | Ast.ConstVolTag(cv) as x -> x
1048       | Ast.Token(tok,info) as x -> x
1049       | Ast.Pragma(str) as x -> x
1050       | Ast.Code(cd) -> Ast.Code(top_level cd)
1051       | Ast.ExprDotsTag(ed) -> Ast.ExprDotsTag(expression_dots ed)
1052       | Ast.ParamDotsTag(pd) -> Ast.ParamDotsTag(parameter_dots pd)
1053       | Ast.StmtDotsTag(sd) -> Ast.StmtDotsTag(statement_dots sd)
1054       | Ast.DeclDotsTag(sd) -> Ast.DeclDotsTag(declaration_dots sd)
1055       | Ast.TypeCTag(ty) -> Ast.TypeCTag(typeC ty)
1056       | Ast.ParamTag(param) -> Ast.ParamTag(parameterTypeDef param)
1057       | Ast.SgrepStartTag(tok) as x -> x
1058       | Ast.SgrepEndTag(tok) as x -> x in
1059     anyfn all_functions k a
1060
1061   and all_functions =
1062     {rebuilder_ident = ident;
1063       rebuilder_expression = expression;
1064       rebuilder_fullType = fullType;
1065       rebuilder_typeC = typeC;
1066       rebuilder_declaration = declaration;
1067       rebuilder_initialiser = initialiser;
1068       rebuilder_parameter = parameterTypeDef;
1069       rebuilder_parameter_list = parameter_dots;
1070       rebuilder_rule_elem = rule_elem;
1071       rebuilder_statement = statement;
1072       rebuilder_case_line = case_line;
1073       rebuilder_top_level = top_level;
1074       rebuilder_expression_dots = expression_dots;
1075       rebuilder_statement_dots = statement_dots;
1076       rebuilder_declaration_dots = declaration_dots;
1077       rebuilder_initialiser_dots = initialiser_dots;
1078       rebuilder_define_param_dots = define_param_dots;
1079       rebuilder_define_param = define_param;
1080       rebuilder_define_parameters = define_parameters;
1081       rebuilder_anything = anything} in
1082   all_functions
1083