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0708f913 C |
1 | (* |
2 | * Copyright 2005-2009, Ecole des Mines de Nantes, University of Copenhagen | |
3 | * Yoann Padioleau, Julia Lawall, Rene Rydhof Hansen, Henrik Stuart, Gilles Muller | |
4 | * This file is part of Coccinelle. | |
5 | * | |
6 | * Coccinelle is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, according to version 2 of the License. | |
9 | * | |
10 | * Coccinelle is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with Coccinelle. If not, see <http://www.gnu.org/licenses/>. | |
17 | * | |
18 | * The authors reserve the right to distribute this or future versions of | |
19 | * Coccinelle under other licenses. | |
20 | *) | |
21 | ||
22 | ||
23 | (* For minus fragment, checks that all of the identifier metavariables that | |
24 | are used are not declared as fresh, and check that all declared variables | |
25 | are used. For plus fragment, just check that the variables declared as | |
26 | fresh are used. What is the issue about error variables? (don't remember) *) | |
27 | ||
28 | module Ast0 = Ast0_cocci | |
29 | module Ast = Ast_cocci | |
30 | module V0 = Visitor_ast0 | |
31 | ||
32 | (* all fresh identifiers *) | |
33 | let fresh_table = (Hashtbl.create(50) : ((string * string), unit) Hashtbl.t) | |
34 | ||
35 | let warning s = Printf.fprintf stderr "warning: %s\n" s | |
36 | ||
37 | let promote name = (name,(),Ast0.default_info(),(),None) | |
38 | ||
39 | (* --------------------------------------------------------------------- *) | |
40 | ||
41 | let find_loop table name = | |
42 | let rec loop = function | |
43 | [] -> raise Not_found | |
44 | | x::xs -> (try Hashtbl.find x name with Not_found -> loop xs) in | |
45 | loop table | |
46 | ||
47 | let check_table table minus (name,_,info,_,_) = | |
48 | let rl = info.Ast0.line_start in | |
49 | if minus | |
50 | then | |
51 | (try (find_loop table name) := true | |
52 | with | |
53 | Not_found -> | |
54 | (try | |
55 | Hashtbl.find fresh_table name; | |
56 | let (_,name) = name in | |
57 | failwith | |
58 | (Printf.sprintf | |
59 | "%d: unexpected use of a fresh identifier %s" rl name) | |
60 | with Not_found -> ())) | |
61 | else (try (find_loop table name) := true with Not_found -> ()) | |
62 | ||
63 | let get_opt fn = Common.do_option fn | |
64 | ||
65 | (* --------------------------------------------------------------------- *) | |
66 | (* Dots *) | |
67 | ||
68 | let dots fn d = | |
69 | match Ast0.unwrap d with | |
70 | Ast0.DOTS(x) -> List.iter fn x | |
71 | | Ast0.CIRCLES(x) -> List.iter fn x | |
72 | | Ast0.STARS(x) -> List.iter fn x | |
73 | ||
74 | (* --------------------------------------------------------------------- *) | |
75 | (* Identifier *) | |
76 | ||
77 | type context = ID | FIELD | FN | GLOBAL | |
78 | ||
79 | (* heuristic for distinguishing ifdef variables from undeclared metavariables*) | |
80 | let is_ifdef name = | |
81 | String.length name > 2 && String.uppercase name = name | |
82 | ||
83 | let ident context old_metas table minus i = | |
84 | match Ast0.unwrap i with | |
85 | Ast0.Id((name,_,info,_,_) : string Ast0.mcode) -> | |
86 | let rl = info.Ast0.line_start in | |
87 | let err = | |
88 | if List.exists (function x -> x = name) old_metas | |
89 | && (minus || Ast0.get_mcodekind i = Ast0.PLUS) | |
90 | then | |
91 | begin | |
92 | warning | |
93 | (Printf.sprintf | |
94 | "line %d: %s, previously declared as a metavariable, is used as an identifier" rl name); | |
95 | true | |
96 | end | |
97 | else false in | |
98 | (match context with | |
99 | ID -> | |
100 | if not (is_ifdef name) && minus && not err(* warn only once per id *) | |
101 | then | |
102 | warning | |
103 | (Printf.sprintf "line %d: should %s be a metavariable?" rl name) | |
104 | | _ -> ()) | |
105 | | Ast0.MetaId(name,_,_) -> check_table table minus name | |
106 | | Ast0.MetaFunc(name,_,_) -> check_table table minus name | |
107 | | Ast0.MetaLocalFunc(name,_,_) -> check_table table minus name | |
108 | | Ast0.OptIdent(_) | Ast0.UniqueIdent(_) -> | |
109 | failwith "unexpected code" | |
110 | ||
111 | (* --------------------------------------------------------------------- *) | |
112 | (* Expression *) | |
113 | ||
114 | let rec expression context old_metas table minus e = | |
115 | match Ast0.unwrap e with | |
116 | Ast0.Ident(id) -> | |
117 | ident context old_metas table minus id | |
118 | | Ast0.FunCall(fn,lp,args,rp) -> | |
119 | expression FN old_metas table minus fn; | |
120 | dots (expression ID old_metas table minus) args | |
121 | | Ast0.Assignment(left,op,right,_) -> | |
122 | expression context old_metas table minus left; | |
123 | expression ID old_metas table minus right | |
124 | | Ast0.CondExpr(exp1,why,exp2,colon,exp3) -> | |
125 | expression ID old_metas table minus exp1; | |
126 | get_opt (expression ID old_metas table minus) exp2; | |
127 | expression ID old_metas table minus exp3 | |
128 | | Ast0.Postfix(exp,op) -> | |
129 | expression ID old_metas table minus exp | |
130 | | Ast0.Infix(exp,op) -> | |
131 | expression ID old_metas table minus exp | |
132 | | Ast0.Unary(exp,op) -> | |
133 | expression ID old_metas table minus exp | |
134 | | Ast0.Binary(left,op,right) -> | |
135 | expression ID old_metas table minus left; | |
136 | expression ID old_metas table minus right | |
137 | | Ast0.Paren(lp,exp,rp) -> | |
138 | expression ID old_metas table minus exp | |
139 | | Ast0.ArrayAccess(exp1,lb,exp2,rb) -> | |
140 | expression ID old_metas table minus exp1; | |
141 | expression ID old_metas table minus exp2 | |
142 | | Ast0.RecordAccess(exp,pt,field) -> | |
143 | expression ID old_metas table minus exp; | |
144 | ident FIELD old_metas table minus field | |
145 | | Ast0.RecordPtAccess(exp,ar,field) -> | |
146 | expression ID old_metas table minus exp; | |
147 | ident FIELD old_metas table minus field | |
148 | | Ast0.Cast(lp,ty,rp,exp) -> | |
149 | typeC old_metas table minus ty; expression ID old_metas table minus exp | |
150 | | Ast0.SizeOfExpr(szf,exp) -> expression ID old_metas table minus exp | |
151 | | Ast0.SizeOfType(szf,lp,ty,rp) -> typeC old_metas table minus ty | |
152 | | Ast0.TypeExp(ty) -> typeC old_metas table minus ty | |
153 | | Ast0.MetaExpr(name,_,Some tys,_,_) -> | |
154 | List.iter | |
155 | (function x -> | |
156 | match get_type_name x with | |
157 | Some(ty) -> check_table table minus (promote ty) | |
158 | | None -> ()) | |
159 | tys; | |
160 | check_table table minus name | |
161 | | Ast0.MetaExpr(name,_,_,_,_) | Ast0.MetaErr(name,_,_) -> | |
162 | check_table table minus name | |
163 | | Ast0.MetaExprList(name,None,_) -> | |
164 | check_table table minus name | |
165 | | Ast0.MetaExprList(name,Some lenname,_) -> | |
166 | check_table table minus name; | |
167 | check_table table minus lenname | |
168 | | Ast0.DisjExpr(_,exps,_,_) -> | |
169 | List.iter (expression ID old_metas table minus) exps | |
170 | | Ast0.NestExpr(_,exp_dots,_,w,_) -> | |
171 | dots (expression ID old_metas table minus) exp_dots; | |
172 | get_opt (expression ID old_metas table minus) w | |
173 | | Ast0.Edots(_,Some x) | Ast0.Ecircles(_,Some x) | Ast0.Estars(_,Some x) -> | |
174 | expression ID old_metas table minus x | |
175 | | _ -> () (* no metavariable subterms *) | |
176 | ||
177 | and get_type_name = function | |
178 | Type_cocci.ConstVol(_,ty) | Type_cocci.SignedT(_,Some ty) | |
179 | | Type_cocci.Pointer(ty) | |
180 | | Type_cocci.FunctionPointer(ty) | Type_cocci.Array(ty) -> get_type_name ty | |
181 | | Type_cocci.MetaType(nm,_,_) -> Some nm | |
182 | | _ -> None | |
183 | ||
184 | (* --------------------------------------------------------------------- *) | |
185 | (* Types *) | |
186 | ||
187 | and typeC old_metas table minus t = | |
188 | match Ast0.unwrap t with | |
189 | Ast0.ConstVol(cv,ty) -> typeC old_metas table minus ty | |
190 | | Ast0.Signed(sgn,ty) -> | |
191 | get_opt (typeC old_metas table minus) ty | |
192 | | Ast0.Pointer(ty,star) -> typeC old_metas table minus ty | |
193 | | Ast0.FunctionPointer(ty,lp1,star,rp1,lp2,params,rp2) -> | |
194 | typeC old_metas table minus ty; | |
195 | parameter_list old_metas table minus params | |
196 | | Ast0.FunctionType(ty,lp1,params,rp1) -> | |
197 | get_opt (typeC old_metas table minus) ty; | |
198 | parameter_list old_metas table minus params | |
199 | | Ast0.Array(ty,lb,size,rb) -> | |
200 | typeC old_metas table minus ty; | |
201 | get_opt (expression ID old_metas table minus) size | |
202 | | Ast0.MetaType(name,_) -> | |
203 | check_table table minus name | |
204 | | Ast0.DisjType(_,types,_,_) -> | |
205 | List.iter (typeC old_metas table minus) types | |
206 | | Ast0.EnumName(en,id) -> ident GLOBAL old_metas table minus id | |
207 | | Ast0.StructUnionName(su,Some id) -> ident GLOBAL old_metas table minus id | |
208 | | Ast0.StructUnionDef(ty,lb,decls,rb) -> | |
209 | typeC old_metas table minus ty; | |
210 | dots (declaration GLOBAL old_metas table minus) decls | |
211 | | Ast0.OptType(ty) | Ast0.UniqueType(ty) -> | |
212 | failwith "unexpected code" | |
213 | | _ -> () (* no metavariable subterms *) | |
214 | ||
215 | (* --------------------------------------------------------------------- *) | |
216 | (* Variable declaration *) | |
217 | (* Even if the Cocci program specifies a list of declarations, they are | |
218 | split out into multiple declarations of a single variable each. *) | |
219 | ||
220 | and declaration context old_metas table minus d = | |
221 | match Ast0.unwrap d with | |
222 | Ast0.Init(stg,ty,id,eq,ini,sem) -> | |
223 | (match Ast0.unwrap ini with | |
224 | Ast0.InitExpr exp -> | |
225 | typeC old_metas table minus ty; | |
226 | ident context old_metas table minus id; | |
227 | expression ID old_metas table minus exp | |
228 | | _ -> | |
229 | (* | |
230 | if minus | |
231 | then | |
232 | failwith "complex initializer specification not allowed in - code" | |
233 | else*) | |
234 | (typeC old_metas table minus ty; | |
235 | ident context old_metas table minus id; | |
236 | initialiser old_metas table minus ini)) | |
237 | | Ast0.UnInit(stg,ty,id,sem) -> | |
238 | typeC old_metas table minus ty; ident context old_metas table minus id | |
239 | | Ast0.MacroDecl(name,lp,args,rp,sem) -> | |
240 | ident GLOBAL old_metas table minus name; | |
241 | dots (expression ID old_metas table minus) args | |
242 | | Ast0.TyDecl(ty,sem) -> typeC old_metas table minus ty | |
243 | | Ast0.Typedef(stg,ty,id,sem) -> | |
244 | typeC old_metas table minus ty; | |
245 | typeC old_metas table minus id | |
246 | | Ast0.DisjDecl(_,decls,_,_) -> | |
247 | List.iter (declaration ID old_metas table minus) decls | |
248 | | Ast0.Ddots(_,Some x) -> declaration ID old_metas table minus x | |
249 | | Ast0.Ddots(_,None) -> () | |
250 | | Ast0.OptDecl(_) | Ast0.UniqueDecl(_) -> | |
251 | failwith "unexpected code" | |
252 | ||
253 | (* --------------------------------------------------------------------- *) | |
254 | (* Initialiser *) | |
255 | ||
256 | and initialiser old_metas table minus ini = | |
257 | match Ast0.unwrap ini with | |
258 | Ast0.MetaInit(name,_) -> | |
259 | check_table table minus name | |
260 | | Ast0.InitExpr(exp) -> expression ID old_metas table minus exp | |
261 | | Ast0.InitList(lb,initlist,rb) -> | |
262 | dots (initialiser old_metas table minus) initlist | |
263 | | Ast0.InitGccExt(designators,eq,ini) -> | |
264 | List.iter (designator old_metas table minus) designators; | |
265 | initialiser old_metas table minus ini | |
266 | | Ast0.InitGccName(name,eq,ini) -> | |
267 | ident FIELD old_metas table minus name; | |
268 | initialiser old_metas table minus ini | |
269 | | Ast0.Idots(_,Some x) -> initialiser old_metas table minus x | |
270 | | Ast0.OptIni(_) | Ast0.UniqueIni(_) -> | |
271 | failwith "unexpected code" | |
272 | | _ -> () (* no metavariable subterms *) | |
273 | ||
274 | and designator old_metas table minus = function | |
275 | Ast0.DesignatorField(dot,id) -> | |
276 | ident FIELD old_metas table minus id | |
277 | | Ast0.DesignatorIndex(lb,exp,rb) -> | |
278 | expression ID old_metas table minus exp | |
279 | | Ast0.DesignatorRange(lb,min,dots,max,rb) -> | |
280 | expression ID old_metas table minus min; | |
281 | expression ID old_metas table minus max | |
282 | ||
283 | and initialiser_list old_metas table minus = | |
284 | dots (initialiser old_metas table minus) | |
285 | ||
286 | (* --------------------------------------------------------------------- *) | |
287 | (* Parameter *) | |
288 | ||
289 | and parameterTypeDef old_metas table minus param = | |
290 | match Ast0.unwrap param with | |
291 | Ast0.Param(ty,id) -> | |
292 | get_opt (ident ID old_metas table minus) id; | |
293 | typeC old_metas table minus ty | |
294 | | Ast0.MetaParam(name,_) -> | |
295 | check_table table minus name | |
296 | | Ast0.MetaParamList(name,None,_) -> | |
297 | check_table table minus name | |
298 | | Ast0.MetaParamList(name,Some lenname,_) -> | |
299 | check_table table minus name; | |
300 | check_table table minus lenname | |
301 | | _ -> () (* no metavariable subterms *) | |
302 | ||
303 | and parameter_list old_metas table minus = | |
304 | dots (parameterTypeDef old_metas table minus) | |
305 | ||
306 | (* --------------------------------------------------------------------- *) | |
307 | (* Top-level code *) | |
308 | ||
309 | and statement old_metas table minus s = | |
310 | match Ast0.unwrap s with | |
311 | Ast0.Decl(_,decl) -> declaration ID old_metas table minus decl | |
312 | | Ast0.Seq(lbrace,body,rbrace) -> dots (statement old_metas table minus) body | |
313 | | Ast0.ExprStatement(exp,sem) -> expression ID old_metas table minus exp | |
314 | | Ast0.IfThen(iff,lp,exp,rp,branch,_) -> | |
315 | expression ID old_metas table minus exp; | |
316 | statement old_metas table minus branch | |
317 | | Ast0.IfThenElse(iff,lp,exp,rp,branch1,els,branch2,_) -> | |
318 | expression ID old_metas table minus exp; | |
319 | statement old_metas table minus branch1; | |
320 | statement old_metas table minus branch2 | |
321 | | Ast0.While(wh,lp,exp,rp,body,_) -> | |
322 | expression ID old_metas table minus exp; | |
323 | statement old_metas table minus body | |
324 | | Ast0.Do(d,body,wh,lp,exp,rp,sem) -> | |
325 | statement old_metas table minus body; | |
326 | expression ID old_metas table minus exp | |
327 | | Ast0.For(fr,lp,exp1,sem1,exp2,sem2,exp3,rp,body,_) -> | |
328 | get_opt (expression ID old_metas table minus) exp1; | |
329 | get_opt (expression ID old_metas table minus) exp2; | |
330 | get_opt (expression ID old_metas table minus) exp3; | |
331 | statement old_metas table minus body | |
332 | | Ast0.Iterator(nm,lp,args,rp,body,_) -> | |
333 | ident GLOBAL old_metas table minus nm; | |
334 | dots (expression ID old_metas table minus) args; | |
335 | statement old_metas table minus body | |
336 | | Ast0.Switch(switch,lp,exp,rp,lb,cases,rb) -> | |
337 | expression ID old_metas table minus exp; | |
338 | dots (case_line old_metas table minus) cases | |
339 | | Ast0.ReturnExpr(ret,exp,sem) -> expression ID old_metas table minus exp | |
340 | | Ast0.MetaStmt(name,_) -> check_table table minus name | |
341 | | Ast0.MetaStmtList(name,_) -> check_table table minus name | |
342 | | Ast0.Exp(exp) -> expression ID old_metas table minus exp | |
343 | | Ast0.TopExp(exp) -> expression ID old_metas table minus exp | |
344 | | Ast0.Ty(ty) -> typeC old_metas table minus ty | |
345 | | Ast0.TopInit(init) -> initialiser old_metas table minus init | |
346 | | Ast0.Disj(_,rule_elem_dots_list,_,_) -> | |
347 | List.iter (dots (statement old_metas table minus)) rule_elem_dots_list | |
348 | | Ast0.Nest(_,rule_elem_dots,_,w,_) -> | |
349 | dots (statement old_metas table minus) rule_elem_dots; | |
350 | List.iter (whencode (dots (statement old_metas table minus)) | |
351 | (statement old_metas table minus) | |
352 | (expression ID old_metas table minus)) | |
353 | w | |
354 | | Ast0.Dots(_,x) | Ast0.Circles(_,x) | Ast0.Stars(_,x) -> | |
355 | List.iter | |
356 | (whencode (dots (statement old_metas table minus)) | |
357 | (statement old_metas table minus) | |
358 | (expression ID old_metas table minus)) x | |
359 | | Ast0.FunDecl(_,fi,name,lp,params,rp,lbrace,body,rbrace) -> | |
360 | ident FN old_metas table minus name; | |
361 | List.iter (fninfo old_metas table minus) fi; | |
362 | parameter_list old_metas table minus params; | |
363 | dots (statement old_metas table minus) body | |
364 | | Ast0.Include(inc,s) -> () (* no metavariables possible *) | |
365 | | Ast0.Define(def,id,_,body) -> | |
366 | ident GLOBAL old_metas table minus id; | |
367 | dots (statement old_metas table minus) body | |
368 | | Ast0.Goto(_,i,_) -> ident ID old_metas table minus i | |
369 | | _ -> () (* no metavariable subterms *) | |
370 | ||
371 | and fninfo old_metas table minus = function | |
372 | Ast0.FStorage(stg) -> () | |
373 | | Ast0.FType(ty) -> typeC old_metas table minus ty | |
374 | | Ast0.FInline(inline) -> () | |
375 | | Ast0.FAttr(attr) -> () | |
376 | ||
377 | and whencode notfn alwaysfn expression = function | |
378 | Ast0.WhenNot a -> notfn a | |
379 | | Ast0.WhenAlways a -> alwaysfn a | |
380 | | Ast0.WhenModifier(_) -> () | |
381 | | Ast0.WhenNotTrue a -> expression a | |
382 | | Ast0.WhenNotFalse a -> expression a | |
383 | ||
384 | and case_line old_metas table minus c = | |
385 | match Ast0.unwrap c with | |
386 | Ast0.Default(def,colon,code) -> | |
387 | dots (statement old_metas table minus) code | |
388 | | Ast0.Case(case,exp,colon,code) -> | |
389 | dots (statement old_metas table minus) code | |
390 | | Ast0.OptCase(case) -> failwith "unexpected code" | |
391 | ||
392 | (* --------------------------------------------------------------------- *) | |
393 | (* Rules *) | |
394 | ||
395 | let top_level old_metas table minus t = | |
396 | match Ast0.unwrap t with | |
397 | Ast0.DECL(stmt) -> statement old_metas table minus stmt | |
398 | | Ast0.CODE(stmt_dots) -> dots (statement old_metas table minus) stmt_dots | |
399 | | Ast0.ERRORWORDS(exps) -> | |
400 | List.iter (expression FN old_metas table minus) exps | |
401 | | _ -> () (* no metavariables possible *) | |
402 | ||
403 | let rule old_metas table minus rules = | |
404 | List.iter (top_level old_metas table minus) rules | |
405 | ||
406 | (* --------------------------------------------------------------------- *) | |
407 | ||
408 | let positions table rules = | |
409 | let mcode x = | |
410 | match Ast0.get_pos x with | |
411 | Ast0.MetaPos(name,constraints,_) -> | |
412 | let pos = Ast0.unwrap_mcode name in | |
413 | (find_loop table pos) := true | |
414 | | _ -> () in | |
415 | let option_default = () in | |
416 | let bind x y = () in | |
417 | let donothing r k e = k e in | |
418 | let fn = | |
419 | V0.combiner bind option_default | |
420 | mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode | |
421 | donothing donothing donothing donothing donothing donothing | |
422 | donothing donothing donothing donothing donothing donothing donothing | |
423 | donothing donothing in | |
424 | ||
425 | List.iter fn.V0.combiner_top_level rules | |
426 | ||
427 | let dup_positions rules = | |
428 | let mcode x = | |
429 | match Ast0.get_pos x with | |
430 | Ast0.MetaPos(name,constraints,_) -> | |
431 | let pos = Ast0.unwrap_mcode name in [pos] | |
432 | | _ -> [] in | |
433 | let option_default = [] in | |
434 | let bind x y = x@y in | |
435 | ||
436 | (* Case for everything that has a disj. | |
437 | Note, no positions on ( | ) of a disjunction, so no need to recurse on | |
438 | these. *) | |
439 | ||
440 | let expression r k e = | |
441 | match Ast0.unwrap e with | |
442 | Ast0.DisjExpr(_,explist,_,_) -> | |
443 | List.fold_left Common.union_set option_default | |
444 | (List.map r.V0.combiner_expression explist) | |
445 | | _ -> k e in | |
446 | ||
447 | let typeC r k e = (* not sure relevent because "only after iso" *) | |
448 | match Ast0.unwrap e with | |
449 | Ast0.DisjType(_,types,_,_) -> | |
450 | List.fold_left Common.union_set option_default | |
451 | (List.map r.V0.combiner_typeC types) | |
452 | | _ -> k e in | |
453 | ||
454 | let declaration r k e = | |
455 | match Ast0.unwrap e with | |
456 | Ast0.DisjDecl(_,decls,_,_) -> | |
457 | List.fold_left Common.union_set option_default | |
458 | (List.map r.V0.combiner_declaration decls) | |
459 | | _ -> k e in | |
460 | ||
461 | let statement r k e = | |
462 | match Ast0.unwrap e with | |
463 | Ast0.Disj(_,stmts,_,_) -> | |
464 | List.fold_left Common.union_set option_default | |
465 | (List.map r.V0.combiner_statement_dots stmts) | |
466 | | _ -> k e in | |
467 | ||
468 | let donothing r k e = k e in | |
469 | let fn = | |
470 | V0.combiner bind option_default | |
471 | mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode | |
472 | donothing donothing donothing donothing donothing donothing | |
473 | donothing expression typeC donothing donothing declaration statement | |
474 | donothing donothing in | |
475 | ||
476 | let res = | |
477 | List.sort compare | |
478 | (List.fold_left Common.union_set option_default | |
479 | (List.map fn.V0.combiner_top_level rules)) in | |
480 | let rec loop = function | |
481 | [] | [_] -> () | |
482 | | ((rule,name) as x)::y::_ when x = y -> | |
483 | failwith (Printf.sprintf "duplicate use of %s.%s" rule name) | |
484 | | _::xs -> loop xs in | |
485 | loop res | |
486 | ||
487 | (* --------------------------------------------------------------------- *) | |
488 | ||
489 | let make_table l = | |
490 | let table = | |
491 | (Hashtbl.create(List.length l) : | |
492 | ((string * string), bool ref) Hashtbl.t) in | |
493 | List.iter | |
494 | (function x -> Hashtbl.add table (Ast.get_meta_name x) (ref false)) l; | |
495 | table | |
496 | ||
497 | let add_to_fresh_table l = | |
498 | List.iter | |
499 | (function x -> | |
500 | let name = Ast.get_meta_name x in Hashtbl.replace fresh_table name ()) | |
501 | l | |
502 | ||
503 | let check_all_marked rname err table after_err = | |
504 | Hashtbl.iter | |
505 | (function name -> | |
506 | function (cell) -> | |
507 | if not (!cell) | |
508 | then | |
509 | let (_,name) = name in | |
510 | warning | |
511 | (Printf.sprintf "%s: %s %s not used %s" rname err name after_err)) | |
512 | table | |
513 | ||
514 | let check_meta rname old_metas inherited_metavars metavars minus plus = | |
515 | let old_metas = | |
516 | List.map (function (_,x) -> x) (List.map Ast.get_meta_name old_metas) in | |
517 | let (fresh,other) = | |
518 | List.partition (function Ast.MetaFreshIdDecl(_,_) -> true | _ -> false) | |
519 | metavars in | |
520 | let (err,other) = | |
521 | List.partition (function Ast.MetaErrDecl(_,_) -> true | _ -> false) | |
522 | other in | |
523 | let (ierr,iother) = | |
524 | List.partition (function Ast.MetaErrDecl(_,_) -> true | _ -> false) | |
525 | inherited_metavars in | |
526 | let fresh_table = make_table fresh in | |
527 | let err_table = make_table (err@ierr) in | |
528 | let other_table = make_table other in | |
529 | let iother_table = make_table iother in | |
530 | add_to_fresh_table fresh; | |
531 | rule old_metas [iother_table;other_table;err_table] true minus; | |
532 | positions [iother_table;other_table] minus; | |
533 | dup_positions minus; | |
534 | check_all_marked rname "metavariable" other_table "in the - or context code"; | |
535 | rule old_metas [iother_table;fresh_table;err_table] false plus; | |
536 | check_all_marked rname "inherited metavariable" iother_table | |
537 | "in the -, +, or context code"; | |
538 | check_all_marked rname "metavariable" fresh_table "in the + code"; | |
539 | check_all_marked rname "error metavariable" err_table "" |