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-(************************************************************************)
-(* v * The Coq Proof Assistant / The Coq Development Team *)
-(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
-(* \VV/ **************************************************************)
-(* // * This file is distributed under the terms of the *)
-(* * GNU Lesser General Public License Version 2.1 *)
-(************************************************************************)
-
-(* $Id: g_constrnew.ml4,v 1.41.2.4 2005/09/21 14:47:33 herbelin Exp $ *)
-
-open Pcoq
-open Constr
-open Prim
-open Rawterm
-open Term
-open Names
-open Libnames
-open Topconstr
-
-open Util
-
-let constr_kw =
- [ "forall"; "fun"; "match"; "fix"; "cofix"; "with"; "in"; "for";
- "end"; "as"; "let"; "if"; "then"; "else"; "return";
- "Prop"; "Set"; "Type"; ".("; "_"; ".." ]
-
-let _ =
- if not !Options.v7 then
- List.iter (fun s -> Lexer.add_token("",s)) constr_kw
-
-(* For Correctness syntax; doesn't work if in psyntax (freeze pb?) *)
-let _ = Lexer.add_token ("","!")
-
-let mk_cast = function
- (c,(_,None)) -> c
- | (c,(_,Some ty)) -> CCast(join_loc (constr_loc c) (constr_loc ty), c, ty)
-
-let mk_lam = function
- ([],c) -> c
- | (bl,c) -> CLambdaN(constr_loc c, bl,c)
-
-let mk_match (loc,cil,rty,br) =
- CCases(loc,(None,rty),cil,br)
-
-let loc_of_binder_let = function
- | LocalRawAssum ((loc,_)::_,_)::_ -> loc
- | LocalRawDef ((loc,_),_)::_ -> loc
- | _ -> dummy_loc
-
-let rec mkCProdN loc bll c =
- match bll with
- | LocalRawAssum ((loc1,_)::_ as idl,t) :: bll ->
- CProdN (loc,[idl,t],mkCProdN (join_loc loc1 loc) bll c)
- | LocalRawDef ((loc1,_) as id,b) :: bll ->
- CLetIn (loc,id,b,mkCProdN (join_loc loc1 loc) bll c)
- | [] -> c
- | LocalRawAssum ([],_) :: bll -> mkCProdN loc bll c
-
-let rec mkCLambdaN loc bll c =
- match bll with
- | LocalRawAssum ((loc1,_)::_ as idl,t) :: bll ->
- CLambdaN (loc,[idl,t],mkCLambdaN (join_loc loc1 loc) bll c)
- | LocalRawDef ((loc1,_) as id,b) :: bll ->
- CLetIn (loc,id,b,mkCLambdaN (join_loc loc1 loc) bll c)
- | [] -> c
- | LocalRawAssum ([],_) :: bll -> mkCLambdaN loc bll c
-
-let rec index_of_annot loc bl ann =
- match names_of_local_assums bl,ann with
- | [_], None -> 0
- | lids, Some x ->
- let ids = List.map snd lids in
- (try list_index (snd x) ids - 1
- with Not_found ->
- user_err_loc(fst x,"index_of_annot", Pp.str"no such fix variable"))
- | _ -> user_err_loc(loc,"index_of_annot",
- Pp.str "cannot guess decreasing argument of fix")
-
-let mk_fixb (id,bl,ann,body,(loc,tyc)) =
- let n = index_of_annot (fst id) bl ann in
- let ty = match tyc with
- Some ty -> ty
- | None -> CHole loc in
- (snd id,n,bl,ty,body)
-
-let mk_cofixb (id,bl,ann,body,(loc,tyc)) =
- let _ = option_app (fun (aloc,_) ->
- Util.user_err_loc
- (aloc,"Constr:mk_cofixb",
- Pp.str"Annotation forbidden in cofix expression")) ann in
- let ty = match tyc with
- Some ty -> ty
- | None -> CHole loc in
- (snd id,bl,ty,body)
-
-let mk_fix(loc,kw,id,dcls) =
- if kw then
- let fb = List.map mk_fixb dcls in
- CFix(loc,id,fb)
- else
- let fb = List.map mk_cofixb dcls in
- CCoFix(loc,id,fb)
-
-let mk_single_fix (loc,kw,dcl) =
- let (id,_,_,_,_) = dcl in mk_fix(loc,kw,id,[dcl])
-
-let binder_constr =
- create_constr_entry (get_univ "constr") "binder_constr"
-
-(* Hack to parse "(x:=t)" as an explicit argument without conflicts with the *)
-(* admissible notation "(x t)" *)
-let lpar_id_coloneq =
- Gram.Entry.of_parser "test_lpar_id_coloneq"
- (fun strm ->
- match Stream.npeek 1 strm with
- | [("","(")] ->
- (match Stream.npeek 2 strm with
- | [_; ("IDENT",s)] ->
- (match Stream.npeek 3 strm with
- | [_; _; ("", ":=")] ->
- Stream.junk strm; Stream.junk strm; Stream.junk strm;
- Names.id_of_string s
- | _ -> raise Stream.Failure)
- | _ -> raise Stream.Failure)
- | _ -> raise Stream.Failure)
-
-
-if not !Options.v7 then
-GEXTEND Gram
- GLOBAL: binder_constr lconstr constr operconstr sort global
- constr_pattern lconstr_pattern Constr.ident binder binder_let pattern;
- Constr.ident:
- [ [ id = Prim.ident -> id
-
- (* This is used in quotations and Syntax *)
- | id = METAIDENT -> id_of_string id ] ]
- ;
- Prim.name:
- [ [ "_" -> (loc, Anonymous) ] ]
- ;
- Prim.ast:
- [ [ "_" -> Coqast.Nvar(loc,id_of_string"_") ] ]
- ;
- global:
- [ [ r = Prim.reference -> r
-
- (* This is used in quotations *)
- | id = METAIDENT -> Ident (loc,id_of_string id) ] ]
- ;
- constr_pattern:
- [ [ c = constr -> c ] ]
- ;
- lconstr_pattern:
- [ [ c = lconstr -> c ] ]
- ;
- sort:
- [ [ "Set" -> RProp Pos
- | "Prop" -> RProp Null
- | "Type" -> RType None ] ]
- ;
- lconstr:
- [ [ c = operconstr LEVEL "200" -> c ] ]
- ;
- constr:
- [ [ c = operconstr LEVEL "9" -> c ] ]
- ;
- operconstr:
- [ "200" RIGHTA
- [ c = binder_constr -> c ]
- | "100" RIGHTA
- [ c1 = operconstr; ":"; c2 = binder_constr -> CCast(loc,c1,c2)
- | c1 = operconstr; ":"; c2 = SELF -> CCast(loc,c1,c2) ]
- | "99" RIGHTA [ ]
- | "90" RIGHTA
- [ c1 = operconstr; "->"; c2 = binder_constr -> CArrow(loc,c1,c2)
- | c1 = operconstr; "->"; c2 = SELF -> CArrow(loc,c1,c2)]
- | "10" LEFTA
- [ f=operconstr; args=LIST1 appl_arg -> CApp(loc,(None,f),args)
- | "@"; f=global; args=LIST0 NEXT -> CAppExpl(loc,(None,f),args) ]
- | "9"
- [ ".."; c = operconstr LEVEL "0"; ".." ->
- CAppExpl (loc,(None,Ident (loc,Topconstr.ldots_var)),[c]) ]
- | "1" LEFTA
- [ c=operconstr; ".("; f=global; args=LIST0 appl_arg; ")" ->
- CApp(loc,(Some (List.length args+1),CRef f),args@[c,None])
- | c=operconstr; ".("; "@"; f=global;
- args=LIST0 (operconstr LEVEL "9"); ")" ->
- CAppExpl(loc,(Some (List.length args+1),f),args@[c])
- | c=operconstr; "%"; key=IDENT -> CDelimiters (loc,key,c) ]
- | "0"
- [ c=atomic_constr -> c
- | c=match_constr -> c
- | "("; c = operconstr LEVEL "200"; ")" ->
- (match c with
- CNumeral(_,Bignat.POS _) -> CNotation(loc,"( _ )",[c])
- | _ -> c) ] ]
- ;
- binder_constr:
- [ [ "forall"; bl = binder_list; ","; c = operconstr LEVEL "200" ->
- mkCProdN loc bl c
- | "fun"; bl = binder_list; "=>"; c = operconstr LEVEL "200" ->
- mkCLambdaN loc bl c
- | "let"; id=name; bl = LIST0 binder_let; ty = type_cstr; ":=";
- c1 = operconstr LEVEL "200"; "in"; c2 = operconstr LEVEL "200" ->
- let loc1 = loc_of_binder_let bl in
- CLetIn(loc,id,mkCLambdaN loc1 bl (mk_cast(c1,ty)),c2)
- | "let"; fx = single_fix; "in"; c = operconstr LEVEL "200" ->
- let fixp = mk_single_fix fx in
- let (li,id) = match fixp with
- CFix(_,id,_) -> id
- | CCoFix(_,id,_) -> id
- | _ -> assert false in
- CLetIn(loc,(li,Name id),fixp,c)
- | "let"; lb = ["("; l=LIST0 name SEP ","; ")" -> l | "()" -> []];
- po = return_type;
- ":="; c1 = operconstr LEVEL "200"; "in";
- c2 = operconstr LEVEL "200" ->
- CLetTuple (loc,List.map snd lb,po,c1,c2)
- | "if"; c=operconstr LEVEL "200"; po = return_type;
- "then"; b1=operconstr LEVEL "200";
- "else"; b2=operconstr LEVEL "200" ->
- CIf (loc, c, po, b1, b2)
- | c=fix_constr -> c ] ]
- ;
- appl_arg:
- [ [ id = lpar_id_coloneq; c=lconstr; ")" ->
- (c,Some (loc,ExplByName id))
- | c=constr -> (c,None) ] ]
- ;
- atomic_constr:
- [ [ g=global -> CRef g
- | s=sort -> CSort(loc,s)
- | n=INT -> CNumeral (loc,Bignat.POS (Bignat.of_string n))
- | "_" -> CHole loc
- | "?"; id=ident -> CPatVar(loc,(false,id)) ] ]
- ;
- fix_constr:
- [ [ fx1=single_fix -> mk_single_fix fx1
- | (_,kw,dcl1)=single_fix; "with"; dcls=LIST1 fix_decl SEP "with";
- "for"; id=identref ->
- mk_fix(loc,kw,id,dcl1::dcls)
- ] ]
- ;
- single_fix:
- [ [ kw=fix_kw; dcl=fix_decl -> (loc,kw,dcl) ] ]
- ;
- fix_kw:
- [ [ "fix" -> true
- | "cofix" -> false ] ]
- ;
- fix_decl:
- [ [ id=identref; bl=LIST0 binder_let; ann=fixannot; ty=type_cstr; ":=";
- c=operconstr LEVEL "200" -> (id,bl,ann,c,ty) ] ]
- ;
- fixannot:
- [ [ "{"; IDENT "struct"; id=name; "}" -> Some id
- | -> None ] ]
- ;
- match_constr:
- [ [ "match"; ci=LIST1 case_item SEP ","; ty=OPT case_type; "with";
- br=branches; "end" -> mk_match (loc,ci,ty,br) ] ]
- ;
- case_item:
- [ [ c=operconstr LEVEL "100"; p=pred_pattern -> (c,p) ] ]
- ;
- pred_pattern:
- [ [ ona = OPT ["as"; id=name -> snd id];
- ty = OPT ["in"; t=lconstr -> t] -> (ona,ty) ] ]
- ;
- case_type:
- [ [ "return"; ty = operconstr LEVEL "100" -> ty ] ]
- ;
- return_type:
- [ [ a = OPT [ na = OPT["as"; id=name -> snd id];
- ty = case_type -> (na,ty) ] ->
- match a with
- | None -> None, None
- | Some (na,t) -> (na, Some t)
- ] ]
- ;
- branches:
- [ [ OPT"|"; br=LIST0 eqn SEP "|" -> br ] ]
- ;
- eqn:
- [ [ pl = LIST1 pattern SEP ","; "=>"; rhs = lconstr -> (loc,pl,rhs) ] ]
- ;
- pattern:
- [ "200" RIGHTA [ ]
- | "99" RIGHTA [ ]
- | "10" LEFTA
- [ p = pattern ; lp = LIST1 (pattern LEVEL "0") ->
- (match p with
- | CPatAtom (_, Some r) -> CPatCstr (loc, r, lp)
- | _ -> Util.user_err_loc
- (cases_pattern_loc p, "compound_pattern",
- Pp.str "Constructor expected"))
- | p = pattern; "as"; id = base_ident ->
- CPatAlias (loc, p, id)
- | c = pattern; "%"; key=IDENT ->
- CPatDelimiters (loc,key,c) ]
- | "0"
- [ r = Prim.reference -> CPatAtom (loc,Some r)
- | "_" -> CPatAtom (loc,None)
- | "("; p = pattern LEVEL "200"; ")" ->
- (match p with
- CPatNumeral(_,Bignat.POS _) -> CPatNotation(loc,"( _ )",[p])
- | _ -> p)
- | n = INT -> CPatNumeral (loc,Bignat.POS(Bignat.of_string n)) ] ]
- ;
- binder_list:
- [ [ idl=LIST1 name; bl=LIST0 binder_let ->
- LocalRawAssum (idl,CHole loc)::bl
- | idl=LIST1 name; ":"; c=lconstr ->
- [LocalRawAssum (idl,c)]
- | "("; idl=LIST1 name; ":"; c=lconstr; ")"; bl=LIST0 binder_let ->
- LocalRawAssum (idl,c)::bl ] ]
- ;
- binder_let:
- [ [ id=name ->
- LocalRawAssum ([id],CHole loc)
- | "("; id=name; idl=LIST1 name; ":"; c=lconstr; ")" ->
- LocalRawAssum (id::idl,c)
- | "("; id=name; ":"; c=lconstr; ")" ->
- LocalRawAssum ([id],c)
- | "("; id=name; ":="; c=lconstr; ")" ->
- LocalRawDef (id,c)
- | "("; id=name; ":"; t=lconstr; ":="; c=lconstr; ")" ->
- LocalRawDef (id,CCast (join_loc (constr_loc t) loc,c,t))
- ] ]
- ;
- binder:
- [ [ id=name -> ([id],CHole loc)
- | "("; idl=LIST1 name; ":"; c=lconstr; ")" -> (idl,c) ] ]
- ;
- type_cstr:
- [ [ c=OPT [":"; c=lconstr -> c] -> (loc,c) ] ]
- ;
- END;;
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