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 (*
  26  * Copyright 2010, INRIA, University of Copenhagen
  27  * Julia Lawall, Rene Rydhof Hansen, Gilles Muller, Nicolas Palix
  28  * Copyright 2005-2009, Ecole des Mines de Nantes, University of Copenhagen
  29  * Yoann Padioleau, Julia Lawall, Rene Rydhof Hansen, Henrik Stuart, Gilles Muller, Nicolas Palix
  30  * This file is part of Coccinelle.
  31  *
  32  * Coccinelle is free software: you can redistribute it and/or modify
  33  * it under the terms of the GNU General Public License as published by
  34  * the Free Software Foundation, according to version 2 of the License.
  35  *
  36  * Coccinelle is distributed in the hope that it will be useful,
  37  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  38  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  39  * GNU General Public License for more details.
  40  *
  41  * You should have received a copy of the GNU General Public License
  42  * along with Coccinelle.  If not, see <http://www.gnu.org/licenses/>.
  43  *
  44  * The authors reserve the right to distribute this or future versions of
  45  * Coccinelle under other licenses.
  46  *)
  47
  48
  49 module Ast0 = Ast0_cocci
  50 module Ast = Ast_cocci
  51
  52 (* --------------------------------------------------------------------- *)
  53 (* Generic traversal: combiner *)
  54 (* parameters:
  55    combining function
  56    treatment of: mcode, identifiers, expressions, fullTypes, types,
  57    declarations, statements, toplevels
  58    default value for options *)
  59
  60 type 'a combiner =
  61     {combiner_ident : Ast.ident -> 'a;
  62      combiner_expression : Ast.expression -> 'a;
  63      combiner_fullType : Ast.fullType -> 'a;
  64      combiner_typeC : Ast.typeC -> 'a;
  65      combiner_declaration : Ast.declaration -> 'a;
  66      combiner_initialiser : Ast.initialiser -> 'a;
  67      combiner_parameter : Ast.parameterTypeDef -> 'a;
  68      combiner_parameter_list : Ast.parameter_list -> 'a;
  69      combiner_rule_elem : Ast.rule_elem -> 'a;
  70      combiner_statement : Ast.statement -> 'a;
  71      combiner_case_line : Ast.case_line -> 'a;
  72      combiner_top_level : Ast.top_level -> 'a;
  73      combiner_anything : Ast.anything  -> 'a;
  74      combiner_expression_dots : Ast.expression Ast.dots -> 'a;
  75      combiner_statement_dots : Ast.statement Ast.dots -> 'a;
  76      combiner_declaration_dots : Ast.declaration Ast.dots -> 'a;
  77      combiner_initialiser_dots : Ast.initialiser Ast.dots -> 'a}
  78
  79 type ('mc,'a) cmcode = 'a combiner -> 'mc Ast_cocci.mcode -> 'a
  80 type ('cd,'a) ccode = 'a combiner -> ('cd -> 'a) -> 'cd -> 'a
  81
  82
  83 let combiner bind option_default
  84     meta_mcodefn string_mcodefn const_mcodefn assign_mcodefn fix_mcodefn
  85     unary_mcodefn binary_mcodefn
  86     cv_mcodefn sign_mcodefn struct_mcodefn storage_mcodefn
  87     inc_file_mcodefn
  88     expdotsfn paramdotsfn stmtdotsfn decldotsfn initdotsfn
  89     identfn exprfn ftfn tyfn initfn paramfn declfn rulefn stmtfn casefn
  90     topfn anyfn =
  91   let multibind l =
  92     let rec loop = function
  93         [] -> option_default
  94       | [x] -> x
  95       | x::xs -> bind x (loop xs) in
  96     loop l in
  97   let get_option f = function
  98       Some x -> f x
  99     | None -> option_default in
 100
 101   let dotsfn param default all_functions arg =
 102     let k d =
 103       match Ast.unwrap d with
 104         Ast.DOTS(l) | Ast.CIRCLES(l) | Ast.STARS(l) ->
 105           multibind (List.map default l) in
 106     param all_functions k arg in
 107
 108   let rec meta_mcode x = meta_mcodefn all_functions x
 109   and string_mcode x = string_mcodefn all_functions x
 110   and const_mcode x = const_mcodefn all_functions x
 111   and assign_mcode x = assign_mcodefn all_functions x
 112   and fix_mcode x = fix_mcodefn all_functions x
 113   and unary_mcode x = unary_mcodefn all_functions x
 114   and binary_mcode x = binary_mcodefn all_functions x
 115   and cv_mcode x = cv_mcodefn all_functions x
 116   and sign_mcode x = sign_mcodefn all_functions x
 117   and struct_mcode x = struct_mcodefn all_functions x
 118   and storage_mcode x = storage_mcodefn all_functions x
 119   and inc_file_mcode x = inc_file_mcodefn all_functions x
 120
 121   and expression_dots d = dotsfn expdotsfn expression all_functions d
 122   and parameter_dots d = dotsfn paramdotsfn parameterTypeDef all_functions d
 123   and statement_dots d = dotsfn stmtdotsfn statement all_functions d
 124   and declaration_dots d = dotsfn decldotsfn declaration all_functions d
 125   and initialiser_dots d = dotsfn initdotsfn initialiser all_functions d
 126
 127   and ident i =
 128     let k i =
 129       match Ast.unwrap i with
 130           Ast.Id(name) -> string_mcode name
 131         | Ast.MetaId(name,_,_,_) -> meta_mcode name
 132         | Ast.MetaFunc(name,_,_,_) -> meta_mcode name
 133         | Ast.MetaLocalFunc(name,_,_,_) -> meta_mcode name
 134         | Ast.OptIdent(id) -> ident id
 135         | Ast.UniqueIdent(id) -> ident id in
 136       identfn all_functions k i
 137
 138   and expression e =
 139     let k e =
 140       match Ast.unwrap e with
 141         Ast.Ident(id) -> ident id
 142       | Ast.Constant(const) -> const_mcode const
 143       | Ast.FunCall(fn,lp,args,rp) ->
 144           multibind [expression fn; string_mcode lp; expression_dots args;
 145                       string_mcode rp]
 146       | Ast.Assignment(left,op,right,simple) ->
 147           multibind [expression left; assign_mcode op; expression right]
 148       | Ast.CondExpr(exp1,why,exp2,colon,exp3) ->
 149           multibind [expression exp1; string_mcode why;
 150                       get_option expression exp2; string_mcode colon;
 151                       expression exp3]
 152       | Ast.Postfix(exp,op) -> bind (expression exp) (fix_mcode op)
 153       | Ast.Infix(exp,op) -> bind (fix_mcode op) (expression exp)
 154       | Ast.Unary(exp,op) -> bind (unary_mcode op) (expression exp)
 155       | Ast.Binary(left,op,right) ->
 156           multibind [expression left; binary_mcode op; expression right]
 157       | Ast.Nested(left,op,right) ->
 158           multibind [expression left; binary_mcode op; expression right]
 159       | Ast.Paren(lp,exp,rp) ->
 160           multibind [string_mcode lp; expression exp; string_mcode rp]
 161       | Ast.ArrayAccess(exp1,lb,exp2,rb) ->
 162           multibind
 163             [expression exp1; string_mcode lb; expression exp2;
 164               string_mcode rb]
 165       | Ast.RecordAccess(exp,pt,field) ->
 166           multibind [expression exp; string_mcode pt; ident field]
 167       | Ast.RecordPtAccess(exp,ar,field) ->
 168           multibind [expression exp; string_mcode ar; ident field]
 169       | Ast.Cast(lp,ty,rp,exp) ->
 170           multibind
 171             [string_mcode lp; fullType ty; string_mcode rp; expression exp]
 172       | Ast.SizeOfExpr(szf,exp) ->
 173           multibind [string_mcode szf; expression exp]
 174       | Ast.SizeOfType(szf,lp,ty,rp) ->
 175           multibind
 176             [string_mcode szf; string_mcode lp; fullType ty; string_mcode rp]
 177       | Ast.TypeExp(ty) -> fullType ty
 178       | Ast.MetaErr(name,_,_,_)
 179       | Ast.MetaExpr(name,_,_,_,_,_)
 180       | Ast.MetaExprList(name,_,_,_) -> meta_mcode name
 181       | Ast.EComma(cm) -> string_mcode cm
 182       | Ast.DisjExpr(exp_list) -> multibind (List.map expression exp_list)
 183       | Ast.NestExpr(starter,expr_dots,ender,whencode,multi) ->
 184           bind (string_mcode starter)
 185             (bind (expression_dots expr_dots)
 186                (bind (string_mcode ender)
 187                   (get_option expression whencode)))
 188       | Ast.Edots(dots,whencode) | Ast.Ecircles(dots,whencode)
 189       | Ast.Estars(dots,whencode) ->
 190           bind (string_mcode dots) (get_option expression whencode)
 191       | Ast.OptExp(exp) | Ast.UniqueExp(exp) ->
 192           expression exp in
 193     exprfn all_functions k e
 194
 195   and fullType ft =
 196     let k ft =
 197       match Ast.unwrap ft with
 198         Ast.Type(cv,ty) -> bind (get_option cv_mcode cv) (typeC ty)
 199       | Ast.DisjType(types) -> multibind (List.map fullType types)
 200       | Ast.OptType(ty) -> fullType ty
 201       | Ast.UniqueType(ty) -> fullType ty in
 202     ftfn all_functions k ft
 203
 204   and function_pointer (ty,lp1,star,rp1,lp2,params,rp2) extra =
 205     (* have to put the treatment of the identifier into the right position *)
 206     multibind
 207       ([fullType ty; string_mcode lp1; string_mcode star] @ extra @
 208        [string_mcode rp1;
 209          string_mcode lp2; parameter_dots params; string_mcode rp2])
 210
 211   and function_type (ty,lp1,params,rp1) extra =
 212     (* have to put the treatment of the identifier into the right position *)
 213     multibind
 214       ([get_option fullType ty] @ extra @
 215        [string_mcode lp1; parameter_dots params; string_mcode rp1])
 216
 217   and array_type (ty,lb,size,rb) extra =
 218     multibind
 219       ([fullType ty] @ extra @
 220        [string_mcode lb; get_option expression size; string_mcode rb])
 221
 222   and typeC ty =
 223     let k ty =
 224       match Ast.unwrap ty with
 225         Ast.BaseType(ty,strings) -> multibind (List.map string_mcode strings)
 226       | Ast.SignedT(sgn,ty) -> bind (sign_mcode sgn) (get_option typeC ty)
 227       | Ast.Pointer(ty,star) ->
 228           bind (fullType ty) (string_mcode star)
 229       | Ast.FunctionPointer(ty,lp1,star,rp1,lp2,params,rp2) ->
 230           function_pointer (ty,lp1,star,rp1,lp2,params,rp2) []
 231       | Ast.FunctionType (_,ty,lp1,params,rp1) ->
 232           function_type (ty,lp1,params,rp1) []
 233       | Ast.Array(ty,lb,size,rb) -> array_type (ty,lb,size,rb) []
 234       | Ast.EnumName(kind,name) ->
 235           bind (string_mcode kind) (get_option ident name)
 236       | Ast.EnumDef(ty,lb,ids,rb) ->
 237           multibind
 238             [fullType ty; string_mcode lb; expression_dots ids;
 239               string_mcode rb]
 240       | Ast.StructUnionName(kind,name) ->
 241           bind (struct_mcode kind) (get_option ident name)
 242       | Ast.StructUnionDef(ty,lb,decls,rb) ->
 243           multibind
 244             [fullType ty; string_mcode lb; declaration_dots decls;
 245               string_mcode rb]
 246       | Ast.TypeName(name) -> string_mcode name
 247       | Ast.MetaType(name,_,_) -> meta_mcode name in
 248     tyfn all_functions k ty
 249
 250   and named_type ty id =
 251     match Ast.unwrap ty with
 252       Ast.Type(None,ty1) ->
 253         (match Ast.unwrap ty1 with
 254           Ast.FunctionPointer(ty,lp1,star,rp1,lp2,params,rp2) ->
 255             function_pointer (ty,lp1,star,rp1,lp2,params,rp2) [ident id]
 256         | Ast.FunctionType(_,ty,lp1,params,rp1) ->
 257             function_type (ty,lp1,params,rp1) [ident id]
 258         | Ast.Array(ty,lb,size,rb) -> array_type (ty,lb,size,rb) [ident id]
 259         | _ -> bind (fullType ty) (ident id))
 260     | _ -> bind (fullType ty) (ident id)
 261
 262   and declaration d =
 263     let k d =
 264       match Ast.unwrap d with
 265         Ast.MetaDecl(name,_,_) | Ast.MetaField(name,_,_) -> meta_mcode name
 266       | Ast.Init(stg,ty,id,eq,ini,sem) ->
 267           bind (get_option storage_mcode stg)
 268             (bind (named_type ty id)
 269                (multibind
 270                   [string_mcode eq; initialiser ini; string_mcode sem]))
 271       | Ast.UnInit(stg,ty,id,sem) ->
 272           bind (get_option storage_mcode stg)
 273             (bind (named_type ty id) (string_mcode sem))
 274       | Ast.MacroDecl(name,lp,args,rp,sem) ->
 275           multibind
 276             [ident name; string_mcode lp; expression_dots args;
 277               string_mcode rp; string_mcode sem]
 278       | Ast.TyDecl(ty,sem) -> bind (fullType ty) (string_mcode sem)
 279       | Ast.Typedef(stg,ty,id,sem) ->
 280           bind (string_mcode stg)
 281             (bind (fullType ty) (bind (typeC id) (string_mcode sem)))
 282       | Ast.DisjDecl(decls) -> multibind (List.map declaration decls)
 283       | Ast.Ddots(dots,whencode) ->
 284           bind (string_mcode dots) (get_option declaration whencode)
 285       | Ast.OptDecl(decl) -> declaration decl
 286       | Ast.UniqueDecl(decl) -> declaration decl in
 287     declfn all_functions k d
 288
 289   and initialiser i =
 290     let k i =
 291       match Ast.unwrap i with
 292         Ast.MetaInit(name,_,_) -> meta_mcode name
 293       | Ast.InitExpr(exp) -> expression exp
 294       | Ast.ArInitList(lb,initlist,rb) ->
 295           multibind
 296             [string_mcode lb; initialiser_dots initlist; string_mcode rb]
 297       | Ast.StrInitList(allminus,lb,initlist,rb,whencode) ->
 298           multibind
 299             [string_mcode lb;
 300               multibind (List.map initialiser initlist);
 301               string_mcode rb;
 302               multibind (List.map initialiser whencode)]
 303       | Ast.InitGccName(name,eq,ini) ->
 304           multibind [ident name; string_mcode eq; initialiser ini]
 305       | Ast.InitGccExt(designators,eq,ini) ->
 306           multibind
 307             ((List.map designator designators) @
 308              [string_mcode eq; initialiser ini])
 309       | Ast.IComma(cm) -> string_mcode cm
 310       | Ast.Idots(dots,whencode) ->
 311           bind (string_mcode dots) (get_option initialiser whencode)
 312       | Ast.OptIni(i) -> initialiser i
 313       | Ast.UniqueIni(i) -> initialiser i in
 314     initfn all_functions k i
 315
 316   and designator = function
 317       Ast.DesignatorField(dot,id) -> bind (string_mcode dot) (ident id)
 318     | Ast.DesignatorIndex(lb,exp,rb) ->
 319         bind (string_mcode lb) (bind (expression exp) (string_mcode rb))
 320     | Ast.DesignatorRange(lb,min,dots,max,rb) ->
 321         multibind
 322           [string_mcode lb; expression min; string_mcode dots;
 323             expression max; string_mcode rb]
 324
 325   and parameterTypeDef p =
 326     let k p =
 327       match Ast.unwrap p with
 328         Ast.VoidParam(ty) -> fullType ty
 329       | Ast.Param(ty,Some id) -> named_type ty id
 330       | Ast.Param(ty,None) -> fullType ty
 331       | Ast.MetaParam(name,_,_) -> meta_mcode name
 332       | Ast.MetaParamList(name,_,_,_) -> meta_mcode name
 333       | Ast.PComma(cm) -> string_mcode cm
 334       | Ast.Pdots(dots) -> string_mcode dots
 335       | Ast.Pcircles(dots) -> string_mcode dots
 336       | Ast.OptParam(param) -> parameterTypeDef param
 337       | Ast.UniqueParam(param) -> parameterTypeDef param in
 338     paramfn all_functions k p
 339
 340   and rule_elem re =
 341     let k re =
 342       match Ast.unwrap re with
 343         Ast.FunHeader(_,_,fi,name,lp,params,rp) ->
 344           multibind
 345             ((List.map fninfo fi) @
 346              [ident name;string_mcode lp;parameter_dots params;
 347                string_mcode rp])
 348       | Ast.Decl(_,_,decl) -> declaration decl
 349       | Ast.SeqStart(brace) -> string_mcode brace
 350       | Ast.SeqEnd(brace) -> string_mcode brace
 351       | Ast.ExprStatement(exp,sem) ->
 352           bind (expression exp) (string_mcode sem)
 353       | Ast.IfHeader(iff,lp,exp,rp) ->
 354           multibind [string_mcode iff; string_mcode lp; expression exp;
 355                       string_mcode rp]
 356       | Ast.Else(els) -> string_mcode els
 357       | Ast.WhileHeader(whl,lp,exp,rp) ->
 358           multibind [string_mcode whl; string_mcode lp; expression exp;
 359                       string_mcode rp]
 360       | Ast.DoHeader(d) -> string_mcode d
 361       | Ast.WhileTail(whl,lp,exp,rp,sem) ->
 362           multibind [string_mcode whl; string_mcode lp; expression exp;
 363                       string_mcode rp; string_mcode sem]
 364       | Ast.ForHeader(fr,lp,e1,sem1,e2,sem2,e3,rp) ->
 365           multibind [string_mcode fr; string_mcode lp;
 366                       get_option expression e1; string_mcode sem1;
 367                       get_option expression e2; string_mcode sem2;
 368                       get_option expression e3; string_mcode rp]
 369       | Ast.IteratorHeader(nm,lp,args,rp) ->
 370           multibind [ident nm; string_mcode lp;
 371                       expression_dots args; string_mcode rp]
 372       | Ast.SwitchHeader(switch,lp,exp,rp) ->
 373           multibind [string_mcode switch; string_mcode lp; expression exp;
 374                       string_mcode rp]
 375       | Ast.Break(br,sem) -> bind (string_mcode br) (string_mcode sem)
 376       | Ast.Continue(cont,sem) -> bind (string_mcode cont) (string_mcode sem)
 377       | Ast.Label(l,dd) -> bind (ident l) (string_mcode dd)
 378       | Ast.Goto(goto,l,sem) ->
 379           bind (string_mcode goto) (bind (ident l) (string_mcode sem))
 380       | Ast.Return(ret,sem) -> bind (string_mcode ret) (string_mcode sem)
 381       | Ast.ReturnExpr(ret,exp,sem) ->
 382           multibind [string_mcode ret; expression exp; string_mcode sem]
 383       | Ast.MetaStmt(name,_,_,_) -> meta_mcode name
 384       | Ast.MetaStmtList(name,_,_) -> meta_mcode name
 385       | Ast.MetaRuleElem(name,_,_) -> meta_mcode name
 386       | Ast.Exp(exp) -> expression exp
 387       | Ast.TopExp(exp) -> expression exp
 388       | Ast.Ty(ty) -> fullType ty
 389       | Ast.TopInit(init) -> initialiser init
 390       | Ast.Include(inc,name) -> bind (string_mcode inc) (inc_file_mcode name)
 391       | Ast.DefineHeader(def,id,params) ->
 392           multibind [string_mcode def; ident id; define_parameters params]
 393       | Ast.Default(def,colon) -> bind (string_mcode def) (string_mcode colon)
 394       | Ast.Case(case,exp,colon) ->
 395           multibind [string_mcode case; expression exp; string_mcode colon]
 396       | Ast.DisjRuleElem(res) -> multibind (List.map rule_elem res) in
 397     rulefn all_functions k re
 398
 399   (* not parameterizable for now... *)
 400   and define_parameters p =
 401     let k p =
 402       match Ast.unwrap p with
 403         Ast.NoParams -> option_default
 404       | Ast.DParams(lp,params,rp) ->
 405           multibind
 406             [string_mcode lp; define_param_dots params; string_mcode rp] in
 407     k p
 408
 409   and define_param_dots d =
 410     let k d =
 411       match Ast.unwrap d with
 412         Ast.DOTS(l) | Ast.CIRCLES(l) | Ast.STARS(l) ->
 413           multibind (List.map define_param l) in
 414     k d
 415
 416   and define_param p =
 417     let k p =
 418       match Ast.unwrap p with
 419         Ast.DParam(id) -> ident id
 420       | Ast.DPComma(comma) -> string_mcode comma
 421       | Ast.DPdots(d) -> string_mcode d
 422       | Ast.DPcircles(c) -> string_mcode c
 423       | Ast.OptDParam(dp) -> define_param dp
 424       | Ast.UniqueDParam(dp) -> define_param dp in
 425     k p
 426
 427   (* discard the result, because the statement is assumed to be already
 428      represented elsewhere in the code *)
 429   and process_bef_aft s =
 430     match Ast.get_dots_bef_aft s with
 431       Ast.NoDots -> ()
 432     | Ast.DroppingBetweenDots(stm,ind) -> let _ = statement stm in ()
 433     | Ast.AddingBetweenDots(stm,ind) -> let _ = statement stm in ()
 434
 435   and statement s =
 436     process_bef_aft s;
 437     let k s =
 438       match Ast.unwrap s with
 439         Ast.Seq(lbrace,body,rbrace) ->
 440           multibind [rule_elem lbrace;
 441                       statement_dots body; rule_elem rbrace]
 442       | Ast.IfThen(header,branch,_) ->
 443           multibind [rule_elem header; statement branch]
 444       | Ast.IfThenElse(header,branch1,els,branch2,_) ->
 445           multibind [rule_elem header; statement branch1; rule_elem els;
 446                       statement branch2]
 447       | Ast.While(header,body,_) ->
 448           multibind [rule_elem header; statement body]
 449       | Ast.Do(header,body,tail) ->
 450           multibind [rule_elem header; statement body; rule_elem tail]
 451       | Ast.For(header,body,_) -> multibind [rule_elem header; statement body]
 452       | Ast.Iterator(header,body,_) ->
 453           multibind [rule_elem header; statement body]
 454       | Ast.Switch(header,lb,decls,cases,rb) ->
 455           multibind [rule_elem header;rule_elem lb;
 456                       statement_dots decls;
 457                       multibind (List.map case_line cases);
 458                       rule_elem rb]
 459       | Ast.Atomic(re) -> rule_elem re
 460       | Ast.Disj(stmt_dots_list) ->
 461           multibind (List.map statement_dots stmt_dots_list)
 462       | Ast.Nest(starter,stmt_dots,ender,whn,_,_,_) ->
 463           bind (string_mcode starter)
 464             (bind (statement_dots stmt_dots)
 465                (bind (string_mcode ender)
 466                   (multibind
 467                      (List.map (whencode statement_dots statement) whn))))
 468       | Ast.FunDecl(header,lbrace,body,rbrace) ->
 469           multibind [rule_elem header; rule_elem lbrace;
 470                       statement_dots body; rule_elem rbrace]
 471       | Ast.Define(header,body) ->
 472           bind (rule_elem header) (statement_dots body)
 473       | Ast.Dots(d,whn,_,_) | Ast.Circles(d,whn,_,_) | Ast.Stars(d,whn,_,_) ->
 474           bind (string_mcode d)
 475             (multibind (List.map (whencode statement_dots statement) whn))
 476       | Ast.OptStm(stmt) | Ast.UniqueStm(stmt) ->
 477           statement stmt in
 478     stmtfn all_functions k s
 479
 480   and fninfo = function
 481       Ast.FStorage(stg) -> storage_mcode stg
 482     | Ast.FType(ty) -> fullType ty
 483     | Ast.FInline(inline) -> string_mcode inline
 484     | Ast.FAttr(attr) -> string_mcode attr
 485
 486   and whencode notfn alwaysfn = function
 487       Ast.WhenNot a -> notfn a
 488     | Ast.WhenAlways a -> alwaysfn a
 489     | Ast.WhenModifier(_) -> option_default
 490     | Ast.WhenNotTrue(e) -> rule_elem e
 491     | Ast.WhenNotFalse(e) -> rule_elem e
 492
 493   and case_line c =
 494     let k c =
 495       match Ast.unwrap c with
 496         Ast.CaseLine(header,code) ->
 497           bind (rule_elem header) (statement_dots code)
 498       | Ast.OptCase(case) -> case_line case in
 499     casefn all_functions k c
 500
 501   and top_level t =
 502     let k t =
 503       match Ast.unwrap t with
 504         Ast.FILEINFO(old_file,new_file) ->
 505           bind (string_mcode old_file) (string_mcode new_file)
 506       | Ast.DECL(stmt) -> statement stmt
 507       | Ast.CODE(stmt_dots) -> statement_dots stmt_dots
 508       | Ast.ERRORWORDS(exps) -> multibind (List.map expression exps) in
 509     topfn all_functions k t
 510
 511   and anything a =
 512     let k = function
 513         (*in many cases below, the thing is not even mcode, so we do nothing*)
 514         Ast.FullTypeTag(ft) -> fullType ft
 515       | Ast.BaseTypeTag(bt) -> option_default
 516       | Ast.StructUnionTag(su) -> option_default
 517       | Ast.SignTag(sgn) -> option_default
 518       | Ast.IdentTag(id) -> ident id
 519       | Ast.ExpressionTag(exp) -> expression exp
 520       | Ast.ConstantTag(cst) -> option_default
 521       | Ast.UnaryOpTag(unop) -> option_default
 522       | Ast.AssignOpTag(asgnop) -> option_default
 523       | Ast.FixOpTag(fixop) -> option_default
 524       | Ast.BinaryOpTag(binop) -> option_default
 525       | Ast.ArithOpTag(arithop) -> option_default
 526       | Ast.LogicalOpTag(logop) -> option_default
 527       | Ast.DeclarationTag(decl) -> declaration decl
 528       | Ast.InitTag(ini) -> initialiser ini
 529       | Ast.StorageTag(stg) -> option_default
 530       | Ast.IncFileTag(stg) -> option_default
 531       | Ast.Rule_elemTag(rule) -> rule_elem rule
 532       | Ast.StatementTag(rule) -> statement rule
 533       | Ast.CaseLineTag(case) -> case_line case
 534       | Ast.ConstVolTag(cv) -> option_default
 535       | Ast.Token(tok,info) -> option_default
 536       | Ast.Pragma(str) -> option_default
 537       | Ast.Code(cd) -> top_level cd
 538       | Ast.ExprDotsTag(ed) -> expression_dots ed
 539       | Ast.ParamDotsTag(pd) -> parameter_dots pd
 540       | Ast.StmtDotsTag(sd) -> statement_dots sd
 541       | Ast.DeclDotsTag(sd) -> declaration_dots sd
 542       | Ast.TypeCTag(ty) -> typeC ty
 543       | Ast.ParamTag(param) -> parameterTypeDef param
 544       | Ast.SgrepStartTag(tok) -> option_default
 545       | Ast.SgrepEndTag(tok) -> option_default in
 546     anyfn all_functions k a
 547
 548   and all_functions =
 549     {combiner_ident = ident;
 550       combiner_expression = expression;
 551       combiner_fullType = fullType;
 552       combiner_typeC = typeC;
 553       combiner_declaration = declaration;
 554       combiner_initialiser = initialiser;
 555       combiner_parameter = parameterTypeDef;
 556       combiner_parameter_list = parameter_dots;
 557       combiner_rule_elem = rule_elem;
 558       combiner_statement = statement;
 559       combiner_case_line = case_line;
 560       combiner_top_level = top_level;
 561       combiner_anything = anything;
 562       combiner_expression_dots = expression_dots;
 563       combiner_statement_dots = statement_dots;
 564       combiner_declaration_dots = declaration_dots;
 565       combiner_initialiser_dots = initialiser_dots} in
 566   all_functions
 567
 568 (* ---------------------------------------------------------------------- *)
 569
 570 type 'a inout = 'a -> 'a (* for specifying the type of rebuilder *)
 571
 572 type rebuilder =
 573     {rebuilder_ident : Ast.ident inout;
 574       rebuilder_expression : Ast.expression inout;
 575       rebuilder_fullType : Ast.fullType inout;
 576       rebuilder_typeC : Ast.typeC inout;
 577       rebuilder_declaration : Ast.declaration inout;
 578       rebuilder_initialiser : Ast.initialiser inout;
 579       rebuilder_parameter : Ast.parameterTypeDef inout;
 580       rebuilder_parameter_list : Ast.parameter_list inout;
 581       rebuilder_statement : Ast.statement inout;
 582       rebuilder_case_line : Ast.case_line inout;
 583       rebuilder_rule_elem : Ast.rule_elem inout;
 584       rebuilder_top_level : Ast.top_level inout;
 585       rebuilder_expression_dots : Ast.expression Ast.dots inout;
 586       rebuilder_statement_dots : Ast.statement Ast.dots inout;
 587       rebuilder_declaration_dots : Ast.declaration Ast.dots inout;
 588       rebuilder_initialiser_dots : Ast.initialiser Ast.dots inout;
 589       rebuilder_define_param_dots : Ast.define_param Ast.dots inout;
 590       rebuilder_define_param : Ast.define_param inout;
 591       rebuilder_define_parameters : Ast.define_parameters inout;
 592       rebuilder_anything : Ast.anything inout}
 593
 594 type 'mc rmcode = 'mc Ast.mcode inout
 595 type 'cd rcode = rebuilder -> ('cd inout) -> 'cd inout
 596
 597
 598 let rebuilder
 599     meta_mcode string_mcode const_mcode assign_mcode fix_mcode unary_mcode
 600     binary_mcode cv_mcode sign_mcode struct_mcode storage_mcode
 601     inc_file_mcode
 602     expdotsfn paramdotsfn stmtdotsfn decldotsfn initdotsfn
 603     identfn exprfn ftfn tyfn initfn paramfn declfn rulefn stmtfn casefn
 604     topfn anyfn =
 605   let get_option f = function
 606       Some x -> Some (f x)
 607     | None -> None in
 608
 609   let dotsfn param default all_functions arg =
 610     let k d =
 611       Ast.rewrap d
 612         (match Ast.unwrap d with
 613           Ast.DOTS(l) -> Ast.DOTS(List.map default l)
 614         | Ast.CIRCLES(l) -> Ast.CIRCLES(List.map default l)
 615         | Ast.STARS(l) -> Ast.STARS(List.map default l)) in
 616     param all_functions k arg in
 617
 618   let rec expression_dots d = dotsfn expdotsfn expression all_functions d
 619   and parameter_dots d = dotsfn paramdotsfn parameterTypeDef all_functions d
 620   and statement_dots d = dotsfn stmtdotsfn statement all_functions d
 621   and declaration_dots d = dotsfn decldotsfn declaration all_functions d
 622   and initialiser_dots d = dotsfn initdotsfn initialiser all_functions d
 623
 624   and ident i =
 625     let k i =
 626       Ast.rewrap i
 627         (match Ast.unwrap i with
 628           Ast.Id(name) -> Ast.Id(string_mcode name)
 629         | Ast.MetaId(name,constraints,keep,inherited) ->
 630             Ast.MetaId(meta_mcode name,constraints,keep,inherited)
 631         | Ast.MetaFunc(name,constraints,keep,inherited) ->
 632             Ast.MetaFunc(meta_mcode name,constraints,keep,inherited)
 633         | Ast.MetaLocalFunc(name,constraints,keep,inherited) ->
 634             Ast.MetaLocalFunc(meta_mcode name,constraints,keep,inherited)
 635         | Ast.OptIdent(id) -> Ast.OptIdent(ident id)
 636         | Ast.UniqueIdent(id) -> Ast.UniqueIdent(ident id)) in
 637     identfn all_functions k i
 638
 639   and expression e =
 640     let k e =
 641       Ast.rewrap e
 642         (match Ast.unwrap e with
 643           Ast.Ident(id) -> Ast.Ident(ident id)
 644         | Ast.Constant(const) -> Ast.Constant(const_mcode const)
 645         | Ast.FunCall(fn,lp,args,rp) ->
 646             Ast.FunCall(expression fn, string_mcode lp, expression_dots args,
 647                         string_mcode rp)
 648         | Ast.Assignment(left,op,right,simple) ->
 649             Ast.Assignment(expression left, assign_mcode op, expression right,
 650                            simple)
 651         | Ast.CondExpr(exp1,why,exp2,colon,exp3) ->
 652             Ast.CondExpr(expression exp1, string_mcode why,
 653                          get_option expression exp2, string_mcode colon,
 654                          expression exp3)
 655         | Ast.Postfix(exp,op) -> Ast.Postfix(expression exp,fix_mcode op)
 656         | Ast.Infix(exp,op) -> Ast.Infix(expression exp,fix_mcode op)
 657         | Ast.Unary(exp,op) -> Ast.Unary(expression exp,unary_mcode op)
 658         | Ast.Binary(left,op,right) ->
 659             Ast.Binary(expression left, binary_mcode op, expression right)
 660         | Ast.Nested(left,op,right) ->
 661             Ast.Nested(expression left, binary_mcode op, expression right)
 662         | Ast.Paren(lp,exp,rp) ->
 663             Ast.Paren(string_mcode lp, expression exp, string_mcode rp)
 664         | Ast.ArrayAccess(exp1,lb,exp2,rb) ->
 665             Ast.ArrayAccess(expression exp1, string_mcode lb, expression exp2,
 666                             string_mcode rb)
 667         | Ast.RecordAccess(exp,pt,field) ->
 668             Ast.RecordAccess(expression exp, string_mcode pt, ident field)
 669         | Ast.RecordPtAccess(exp,ar,field) ->
 670             Ast.RecordPtAccess(expression exp, string_mcode ar, ident field)
 671         | Ast.Cast(lp,ty,rp,exp) ->
 672             Ast.Cast(string_mcode lp, fullType ty, string_mcode rp,
 673                      expression exp)
 674         | Ast.SizeOfExpr(szf,exp) ->
 675             Ast.SizeOfExpr(string_mcode szf, expression exp)
 676         | Ast.SizeOfType(szf,lp,ty,rp) ->
 677             Ast.SizeOfType(string_mcode szf,string_mcode lp, fullType ty,
 678                            string_mcode rp)
 679         | Ast.TypeExp(ty) -> Ast.TypeExp(fullType ty)
 680         | Ast.MetaErr(name,constraints,keep,inherited) ->
 681             Ast.MetaErr(meta_mcode name,constraints,keep,inherited)
 682         | Ast.MetaExpr(name,constraints,keep,ty,form,inherited) ->
 683             Ast.MetaExpr(meta_mcode name,constraints,keep,ty,form,inherited)
 684         | Ast.MetaExprList(name,lenname_inh,keep,inherited) ->
 685             Ast.MetaExprList(meta_mcode name,lenname_inh,keep,inherited)
 686         | Ast.EComma(cm) -> Ast.EComma(string_mcode cm)
 687         | Ast.DisjExpr(exp_list) -> Ast.DisjExpr(List.map expression exp_list)
 688         | Ast.NestExpr(starter,expr_dots,ender,whencode,multi) ->
 689             Ast.NestExpr(string_mcode starter,expression_dots expr_dots,
 690                          string_mcode ender,
 691                          get_option expression whencode,multi)
 692         | Ast.Edots(dots,whencode) ->
 693             Ast.Edots(string_mcode dots,get_option expression whencode)
 694         | Ast.Ecircles(dots,whencode) ->
 695             Ast.Ecircles(string_mcode dots,get_option expression whencode)
 696         | Ast.Estars(dots,whencode) ->
 697             Ast.Estars(string_mcode dots,get_option expression whencode)
 698         | Ast.OptExp(exp) -> Ast.OptExp(expression exp)
 699         | Ast.UniqueExp(exp) -> Ast.UniqueExp(expression exp)) in
 700     exprfn all_functions k e
 701
 702   and fullType ft =
 703     let k ft =
 704       Ast.rewrap ft
 705         (match Ast.unwrap ft with
 706           Ast.Type(cv,ty) -> Ast.Type (get_option cv_mcode cv, typeC ty)
 707         | Ast.DisjType(types) -> Ast.DisjType(List.map fullType types)
 708         | Ast.OptType(ty) -> Ast.OptType(fullType ty)
 709         | Ast.UniqueType(ty) -> Ast.UniqueType(fullType ty)) in
 710     ftfn all_functions k ft
 711
 712   and typeC ty =
 713     let k ty =
 714       Ast.rewrap ty
 715         (match Ast.unwrap ty with
 716           Ast.BaseType(ty,strings) ->
 717             Ast.BaseType (ty, List.map string_mcode strings)
 718         | Ast.SignedT(sgn,ty) ->
 719             Ast.SignedT(sign_mcode sgn,get_option typeC ty)
 720         | Ast.Pointer(ty,star) ->
 721             Ast.Pointer (fullType ty, string_mcode star)
 722         | Ast.FunctionPointer(ty,lp1,star,rp1,lp2,params,rp2) ->
 723             Ast.FunctionPointer(fullType ty,string_mcode lp1,string_mcode star,
 724                                 string_mcode rp1,string_mcode lp2,
 725                                 parameter_dots params,
 726                                 string_mcode rp2)
 727         | Ast.FunctionType(allminus,ty,lp,params,rp) ->
 728             Ast.FunctionType(allminus,get_option fullType ty,string_mcode lp,
 729                              parameter_dots params,string_mcode rp)
 730         | Ast.Array(ty,lb,size,rb) ->
 731             Ast.Array(fullType ty, string_mcode lb,
 732                       get_option expression size, string_mcode rb)
 733         | Ast.EnumName(kind,name) ->
 734             Ast.EnumName(string_mcode kind, get_option ident name)
 735         | Ast.EnumDef(ty,lb,ids,rb) ->
 736             Ast.EnumDef (fullType ty, string_mcode lb, expression_dots ids,
 737                          string_mcode rb)
 738         | Ast.StructUnionName(kind,name) ->
 739             Ast.StructUnionName (struct_mcode kind, get_option ident name)
 740         | Ast.StructUnionDef(ty,lb,decls,rb) ->
 741             Ast.StructUnionDef (fullType ty,
 742                                 string_mcode lb, declaration_dots decls,
 743                                 string_mcode rb)
 744         | Ast.TypeName(name) -> Ast.TypeName(string_mcode name)
 745         | Ast.MetaType(name,keep,inherited) ->
 746             Ast.MetaType(meta_mcode name,keep,inherited)) in
 747     tyfn all_functions k ty
 748
 749   and declaration d =
 750     let k d =
 751       Ast.rewrap d
 752         (match Ast.unwrap d with
 753           Ast.MetaDecl(name,keep,inherited) ->
 754             Ast.MetaDecl(meta_mcode name,keep,inherited)
 755         | Ast.MetaField(name,keep,inherited) ->
 756             Ast.MetaField(meta_mcode name,keep,inherited)
 757         | Ast.Init(stg,ty,id,eq,ini,sem) ->
 758             Ast.Init(get_option storage_mcode stg, fullType ty, ident id,
 759                      string_mcode eq, initialiser ini, string_mcode sem)
 760         | Ast.UnInit(stg,ty,id,sem) ->
 761             Ast.UnInit(get_option storage_mcode stg, fullType ty, ident id,
 762                        string_mcode sem)
 763         | Ast.MacroDecl(name,lp,args,rp,sem) ->
 764             Ast.MacroDecl(ident name, string_mcode lp, expression_dots args,
 765                           string_mcode rp,string_mcode sem)
 766         | Ast.TyDecl(ty,sem) -> Ast.TyDecl(fullType ty, string_mcode sem)
 767         | Ast.Typedef(stg,ty,id,sem) ->
 768             Ast.Typedef(string_mcode stg, fullType ty, typeC id,
 769                         string_mcode sem)
 770         | Ast.DisjDecl(decls) -> Ast.DisjDecl(List.map declaration decls)
 771         | Ast.Ddots(dots,whencode) ->
 772             Ast.Ddots(string_mcode dots, get_option declaration whencode)
 773         | Ast.OptDecl(decl) -> Ast.OptDecl(declaration decl)
 774         | Ast.UniqueDecl(decl) -> Ast.UniqueDecl(declaration decl)) in
 775     declfn all_functions k d
 776
 777   and initialiser i =
 778     let k i =
 779       Ast.rewrap i
 780         (match Ast.unwrap i with
 781           Ast.MetaInit(name,keep,inherited) ->
 782             Ast.MetaInit(meta_mcode name,keep,inherited)
 783         | Ast.InitExpr(exp) -> Ast.InitExpr(expression exp)
 784         | Ast.ArInitList(lb,initlist,rb) ->
 785             Ast.ArInitList(string_mcode lb, initialiser_dots initlist,
 786                            string_mcode rb)
 787         | Ast.StrInitList(allminus,lb,initlist,rb,whencode) ->
 788             Ast.StrInitList(allminus,
 789                          string_mcode lb, List.map initialiser initlist,
 790                          string_mcode rb, List.map initialiser whencode)
 791         | Ast.InitGccName(name,eq,ini) ->
 792             Ast.InitGccName(ident name, string_mcode eq, initialiser ini)
 793         | Ast.InitGccExt(designators,eq,ini) ->
 794             Ast.InitGccExt
 795               (List.map designator designators, string_mcode eq,
 796                initialiser ini)
 797         | Ast.IComma(cm) -> Ast.IComma(string_mcode cm)
 798         | Ast.Idots(dots,whencode) ->
 799             Ast.Idots(string_mcode dots,get_option initialiser whencode)
 800         | Ast.OptIni(i) -> Ast.OptIni(initialiser i)
 801         | Ast.UniqueIni(i) -> Ast.UniqueIni(initialiser i)) in
 802     initfn all_functions k i
 803
 804   and designator = function
 805       Ast.DesignatorField(dot,id) ->
 806         Ast.DesignatorField(string_mcode dot,ident id)
 807     | Ast.DesignatorIndex(lb,exp,rb) ->
 808         Ast.DesignatorIndex(string_mcode lb,expression exp,string_mcode rb)
 809     | Ast.DesignatorRange(lb,min,dots,max,rb) ->
 810         Ast.DesignatorRange(string_mcode lb,expression min,string_mcode dots,
 811                              expression max,string_mcode rb)
 812
 813   and parameterTypeDef p =
 814     let k p =
 815       Ast.rewrap p
 816         (match Ast.unwrap p with
 817           Ast.VoidParam(ty) -> Ast.VoidParam(fullType ty)
 818         | Ast.Param(ty,id) -> Ast.Param(fullType ty, get_option ident id)
 819         | Ast.MetaParam(name,keep,inherited) ->
 820             Ast.MetaParam(meta_mcode name,keep,inherited)
 821         | Ast.MetaParamList(name,lenname_inh,keep,inherited) ->
 822             Ast.MetaParamList(meta_mcode name,lenname_inh,keep,inherited)
 823         | Ast.PComma(cm) -> Ast.PComma(string_mcode cm)
 824         | Ast.Pdots(dots) -> Ast.Pdots(string_mcode dots)
 825         | Ast.Pcircles(dots) -> Ast.Pcircles(string_mcode dots)
 826         | Ast.OptParam(param) -> Ast.OptParam(parameterTypeDef param)
 827         | Ast.UniqueParam(param) -> Ast.UniqueParam(parameterTypeDef param)) in
 828     paramfn all_functions k p
 829
 830   and rule_elem re =
 831     let k re =
 832       Ast.rewrap re
 833         (match Ast.unwrap re with
 834           Ast.FunHeader(bef,allminus,fi,name,lp,params,rp) ->
 835             Ast.FunHeader(bef,allminus,List.map fninfo fi,ident name,
 836                           string_mcode lp, parameter_dots params,
 837                           string_mcode rp)
 838         | Ast.Decl(bef,allminus,decl) ->
 839             Ast.Decl(bef,allminus,declaration decl)
 840         | Ast.SeqStart(brace) -> Ast.SeqStart(string_mcode brace)
 841         | Ast.SeqEnd(brace) -> Ast.SeqEnd(string_mcode brace)
 842         | Ast.ExprStatement(exp,sem) ->
 843             Ast.ExprStatement (expression exp, string_mcode sem)
 844         | Ast.IfHeader(iff,lp,exp,rp) ->
 845             Ast.IfHeader(string_mcode iff, string_mcode lp, expression exp,
 846               string_mcode rp)
 847         | Ast.Else(els) -> Ast.Else(string_mcode els)
 848         | Ast.WhileHeader(whl,lp,exp,rp) ->
 849             Ast.WhileHeader(string_mcode whl, string_mcode lp, expression exp,
 850                             string_mcode rp)
 851         | Ast.DoHeader(d) -> Ast.DoHeader(string_mcode d)
 852         | Ast.WhileTail(whl,lp,exp,rp,sem) ->
 853             Ast.WhileTail(string_mcode whl, string_mcode lp, expression exp,
 854                           string_mcode rp, string_mcode sem)
 855         | Ast.ForHeader(fr,lp,e1,sem1,e2,sem2,e3,rp) ->
 856             Ast.ForHeader(string_mcode fr, string_mcode lp,
 857                           get_option expression e1, string_mcode sem1,
 858                           get_option expression e2, string_mcode sem2,
 859                           get_option expression e3, string_mcode rp)
 860         | Ast.IteratorHeader(whl,lp,args,rp) ->
 861             Ast.IteratorHeader(ident whl, string_mcode lp,
 862                                expression_dots args, string_mcode rp)
 863         | Ast.SwitchHeader(switch,lp,exp,rp) ->
 864             Ast.SwitchHeader(string_mcode switch, string_mcode lp,
 865                              expression exp, string_mcode rp)
 866         | Ast.Break(br,sem) ->
 867             Ast.Break(string_mcode br, string_mcode sem)
 868         | Ast.Continue(cont,sem) ->
 869             Ast.Continue(string_mcode cont, string_mcode sem)
 870         | Ast.Label(l,dd) -> Ast.Label(ident l, string_mcode dd)
 871         | Ast.Goto(goto,l,sem) ->
 872             Ast.Goto(string_mcode goto,ident l,string_mcode sem)
 873         | Ast.Return(ret,sem) ->
 874             Ast.Return(string_mcode ret, string_mcode sem)
 875         | Ast.ReturnExpr(ret,exp,sem) ->
 876             Ast.ReturnExpr(string_mcode ret, expression exp, string_mcode sem)
 877         | Ast.MetaStmt(name,keep,seqible,inherited) ->
 878             Ast.MetaStmt(meta_mcode name,keep,seqible,inherited)
 879         | Ast.MetaStmtList(name,keep,inherited) ->
 880             Ast.MetaStmtList(meta_mcode name,keep,inherited)
 881         | Ast.MetaRuleElem(name,keep,inherited) ->
 882             Ast.MetaRuleElem(meta_mcode name,keep,inherited)
 883         | Ast.Exp(exp) -> Ast.Exp(expression exp)
 884         | Ast.TopExp(exp) -> Ast.TopExp(expression exp)
 885         | Ast.Ty(ty) -> Ast.Ty(fullType ty)
 886         | Ast.TopInit(init) -> Ast.TopInit(initialiser init)
 887         | Ast.Include(inc,name) ->
 888             Ast.Include(string_mcode inc,inc_file_mcode name)
 889         | Ast.DefineHeader(def,id,params) ->
 890             Ast.DefineHeader(string_mcode def,ident id,
 891                              define_parameters params)
 892         | Ast.Default(def,colon) ->
 893             Ast.Default(string_mcode def,string_mcode colon)
 894         | Ast.Case(case,exp,colon) ->
 895             Ast.Case(string_mcode case,expression exp,string_mcode colon)
 896         | Ast.DisjRuleElem(res) -> Ast.DisjRuleElem(List.map rule_elem res)) in
 897     rulefn all_functions k re
 898
 899   (* not parameterizable for now... *)
 900   and define_parameters p =
 901     let k p =
 902       Ast.rewrap p
 903         (match Ast.unwrap p with
 904           Ast.NoParams -> Ast.NoParams
 905         | Ast.DParams(lp,params,rp) ->
 906             Ast.DParams(string_mcode lp,define_param_dots params,
 907                         string_mcode rp)) in
 908     k p
 909
 910   and define_param_dots d =
 911     let k d =
 912       Ast.rewrap d
 913         (match Ast.unwrap d with
 914           Ast.DOTS(l) -> Ast.DOTS(List.map define_param l)
 915         | Ast.CIRCLES(l) -> Ast.CIRCLES(List.map define_param l)
 916         | Ast.STARS(l) -> Ast.STARS(List.map define_param l)) in
 917     k d
 918
 919   and define_param p =
 920     let k p =
 921       Ast.rewrap p
 922         (match Ast.unwrap p with
 923           Ast.DParam(id) -> Ast.DParam(ident id)
 924         | Ast.DPComma(comma) -> Ast.DPComma(string_mcode comma)
 925         | Ast.DPdots(d) -> Ast.DPdots(string_mcode d)
 926         | Ast.DPcircles(c) -> Ast.DPcircles(string_mcode c)
 927         | Ast.OptDParam(dp) -> Ast.OptDParam(define_param dp)
 928         | Ast.UniqueDParam(dp) -> Ast.UniqueDParam(define_param dp)) in
 929     k p
 930
 931   and process_bef_aft s =
 932     Ast.set_dots_bef_aft
 933       (match Ast.get_dots_bef_aft s with
 934         Ast.NoDots -> Ast.NoDots
 935       | Ast.DroppingBetweenDots(stm,ind) ->
 936           Ast.DroppingBetweenDots(statement stm,ind)
 937       | Ast.AddingBetweenDots(stm,ind) ->
 938           Ast.AddingBetweenDots(statement stm,ind))
 939       s
 940
 941   and statement s =
 942     let k s =
 943       Ast.rewrap s
 944         (match Ast.unwrap s with
 945           Ast.Seq(lbrace,body,rbrace) ->
 946             Ast.Seq(rule_elem lbrace,
 947                     statement_dots body, rule_elem rbrace)
 948         | Ast.IfThen(header,branch,aft) ->
 949             Ast.IfThen(rule_elem header, statement branch,aft)
 950         | Ast.IfThenElse(header,branch1,els,branch2,aft) ->
 951             Ast.IfThenElse(rule_elem header, statement branch1, rule_elem els,
 952                            statement branch2, aft)
 953         | Ast.While(header,body,aft) ->
 954             Ast.While(rule_elem header, statement body, aft)
 955         | Ast.Do(header,body,tail) ->
 956             Ast.Do(rule_elem header, statement body, rule_elem tail)
 957         | Ast.For(header,body,aft) ->
 958             Ast.For(rule_elem header, statement body, aft)
 959         | Ast.Iterator(header,body,aft) ->
 960             Ast.Iterator(rule_elem header, statement body, aft)
 961         | Ast.Switch(header,lb,decls,cases,rb) ->
 962             Ast.Switch(rule_elem header,rule_elem lb,
 963                        statement_dots decls,
 964                        List.map case_line cases,rule_elem rb)
 965         | Ast.Atomic(re) -> Ast.Atomic(rule_elem re)
 966         | Ast.Disj(stmt_dots_list) ->
 967             Ast.Disj (List.map statement_dots stmt_dots_list)
 968         | Ast.Nest(starter,stmt_dots,ender,whn,multi,bef,aft) ->
 969             Ast.Nest(string_mcode starter,statement_dots stmt_dots,
 970                      string_mcode ender,
 971                      List.map (whencode statement_dots statement) whn,
 972                      multi,bef,aft)
 973         | Ast.FunDecl(header,lbrace,body,rbrace) ->
 974             Ast.FunDecl(rule_elem header,rule_elem lbrace,
 975                         statement_dots body, rule_elem rbrace)
 976         | Ast.Define(header,body) ->
 977             Ast.Define(rule_elem header,statement_dots body)
 978         | Ast.Dots(d,whn,bef,aft) ->
 979             Ast.Dots(string_mcode d,
 980                      List.map (whencode statement_dots statement) whn,bef,aft)
 981         | Ast.Circles(d,whn,bef,aft) ->
 982             Ast.Circles(string_mcode d,
 983                         List.map (whencode statement_dots statement) whn,
 984                         bef,aft)
 985         | Ast.Stars(d,whn,bef,aft) ->
 986             Ast.Stars(string_mcode d,
 987                       List.map (whencode statement_dots statement) whn,bef,aft)
 988         | Ast.OptStm(stmt) -> Ast.OptStm(statement stmt)
 989         | Ast.UniqueStm(stmt) -> Ast.UniqueStm(statement stmt)) in
 990     let s = stmtfn all_functions k s in
 991     (* better to do this after, in case there is an equality test on the whole
 992        statement, eg in free_vars.  equality test would require that this
 993        subterm not already be changed *)
 994     process_bef_aft s
 995
 996   and fninfo = function
 997       Ast.FStorage(stg) -> Ast.FStorage(storage_mcode stg)
 998     | Ast.FType(ty) -> Ast.FType(fullType ty)
 999     | Ast.FInline(inline) -> Ast.FInline(string_mcode inline)
1000     | Ast.FAttr(attr) -> Ast.FAttr(string_mcode attr)
1001
1002   and whencode notfn alwaysfn = function
1003       Ast.WhenNot a -> Ast.WhenNot (notfn a)
1004     | Ast.WhenAlways a -> Ast.WhenAlways (alwaysfn a)
1005     | Ast.WhenModifier(x)    -> Ast.WhenModifier(x)
1006     | Ast.WhenNotTrue(e) -> Ast.WhenNotTrue(rule_elem e)
1007     | Ast.WhenNotFalse(e) -> Ast.WhenNotFalse(rule_elem e)
1008
1009   and case_line c =
1010     let k c =
1011       Ast.rewrap c
1012         (match Ast.unwrap c with
1013           Ast.CaseLine(header,code) ->
1014             Ast.CaseLine(rule_elem header,statement_dots code)
1015         | Ast.OptCase(case) -> Ast.OptCase(case_line case)) in
1016     casefn all_functions k c
1017
1018   and top_level t =
1019     let k t =
1020       Ast.rewrap t
1021         (match Ast.unwrap t with
1022           Ast.FILEINFO(old_file,new_file) ->
1023             Ast.FILEINFO (string_mcode old_file, string_mcode new_file)
1024         | Ast.DECL(stmt) -> Ast.DECL(statement stmt)
1025         | Ast.CODE(stmt_dots) -> Ast.CODE(statement_dots stmt_dots)
1026         | Ast.ERRORWORDS(exps) -> Ast.ERRORWORDS (List.map expression exps)) in
1027     topfn all_functions k t
1028
1029   and anything a =
1030     let k = function
1031         (*in many cases below, the thing is not even mcode, so we do nothing*)
1032         Ast.FullTypeTag(ft) -> Ast.FullTypeTag(fullType ft)
1033       | Ast.BaseTypeTag(bt) as x -> x
1034       | Ast.StructUnionTag(su) as x -> x
1035       | Ast.SignTag(sgn) as x -> x
1036       | Ast.IdentTag(id) -> Ast.IdentTag(ident id)
1037       | Ast.ExpressionTag(exp) -> Ast.ExpressionTag(expression exp)
1038       | Ast.ConstantTag(cst) as x -> x
1039       | Ast.UnaryOpTag(unop) as x -> x
1040       | Ast.AssignOpTag(asgnop) as x -> x
1041       | Ast.FixOpTag(fixop) as x -> x
1042       | Ast.BinaryOpTag(binop) as x -> x
1043       | Ast.ArithOpTag(arithop) as x -> x
1044       | Ast.LogicalOpTag(logop) as x -> x
1045       | Ast.InitTag(decl) -> Ast.InitTag(initialiser decl)
1046       | Ast.DeclarationTag(decl) -> Ast.DeclarationTag(declaration decl)
1047       | Ast.StorageTag(stg) as x -> x
1048       | Ast.IncFileTag(stg) as x -> x
1049       | Ast.Rule_elemTag(rule) -> Ast.Rule_elemTag(rule_elem rule)
1050       | Ast.StatementTag(rule) -> Ast.StatementTag(statement rule)
1051       | Ast.CaseLineTag(case) -> Ast.CaseLineTag(case_line case)
1052       | Ast.ConstVolTag(cv) as x -> x
1053       | Ast.Token(tok,info) as x -> x
1054       | Ast.Pragma(str) as x -> x
1055       | Ast.Code(cd) -> Ast.Code(top_level cd)
1056       | Ast.ExprDotsTag(ed) -> Ast.ExprDotsTag(expression_dots ed)
1057       | Ast.ParamDotsTag(pd) -> Ast.ParamDotsTag(parameter_dots pd)
1058       | Ast.StmtDotsTag(sd) -> Ast.StmtDotsTag(statement_dots sd)
1059       | Ast.DeclDotsTag(sd) -> Ast.DeclDotsTag(declaration_dots sd)
1060       | Ast.TypeCTag(ty) -> Ast.TypeCTag(typeC ty)
1061       | Ast.ParamTag(param) -> Ast.ParamTag(parameterTypeDef param)
1062       | Ast.SgrepStartTag(tok) as x -> x
1063       | Ast.SgrepEndTag(tok) as x -> x in
1064     anyfn all_functions k a
1065
1066   and all_functions =
1067     {rebuilder_ident = ident;
1068       rebuilder_expression = expression;
1069       rebuilder_fullType = fullType;
1070       rebuilder_typeC = typeC;
1071       rebuilder_declaration = declaration;
1072       rebuilder_initialiser = initialiser;
1073       rebuilder_parameter = parameterTypeDef;
1074       rebuilder_parameter_list = parameter_dots;
1075       rebuilder_rule_elem = rule_elem;
1076       rebuilder_statement = statement;
1077       rebuilder_case_line = case_line;
1078       rebuilder_top_level = top_level;
1079       rebuilder_expression_dots = expression_dots;
1080       rebuilder_statement_dots = statement_dots;
1081       rebuilder_declaration_dots = declaration_dots;
1082       rebuilder_initialiser_dots = initialiser_dots;
1083       rebuilder_define_param_dots = define_param_dots;
1084       rebuilder_define_param = define_param;
1085       rebuilder_define_parameters = define_parameters;
1086       rebuilder_anything = anything} in
1087   all_functions
1088