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|
(*i camlp4deps: "parsing/grammar.cma" i*)
(* $Id$ *)
open Pp
open Util
open Names
open Univ
open Term
open Environ
let lexer = {
Token.func = Lexer.func;
Token.using = (function ("",s) -> Lexer.add_keyword s | _ -> ());
Token.removing = (fun _ -> ());
Token.tparse = Lexer.tparse;
Token.text = Lexer.token_text }
type command =
| Definition of identifier * constr option * constr
| Parameter of identifier * constr
| Variable of identifier * constr
| Inductive of
(identifier * constr) list *
(identifier * constr * (identifier * constr) list) list
| Check of constr
let gram = Grammar.create lexer
let term = Grammar.Entry.create gram "term"
let name = Grammar.Entry.create gram "name"
let nametype = Grammar.Entry.create gram "nametype"
let inductive = Grammar.Entry.create gram "inductive"
let constructor = Grammar.Entry.create gram "constructor"
let command = Grammar.Entry.create gram "command"
let new_univ =
let uc = ref 0 in
let univ = id_of_string "univ" in
fun () -> incr uc; { u_sp = make_path [] univ CCI; u_num = !uc }
let path_of_string s = make_path [] (id_of_string s) CCI
EXTEND
name:
[ [ id = IDENT -> Name (id_of_string id)
| "_" -> Anonymous
] ];
nametype:
[ [ id = IDENT; ":"; t = term -> (id_of_string id, t)
] ];
term:
[ [ id = IDENT ->
VAR (id_of_string id)
| IDENT "Rel"; n = INT ->
Rel (int_of_string n)
| "Set" ->
DOP0 (Sort (Prop Pos))
| "Prop" ->
DOP0 (Sort (Prop Null))
| "Type" ->
DOP0 (Sort (Type (new_univ())))
| "Const"; id = IDENT ->
DOPN (Const (path_of_string id), [||])
| "Ind"; id = IDENT; n = INT ->
let n = int_of_string n in
DOPN (MutInd (path_of_string id, n), [||])
| "Construct"; id = IDENT; n = INT; i = INT ->
let n = int_of_string n and i = int_of_string i in
DOPN (MutConstruct ((path_of_string id, n), i), [||])
| "["; na = name; ":"; t = term; "]"; c = term ->
DOP2 (Lambda, t, DLAM (na, c))
| "("; na = name; ":"; t = term; ")"; c = term ->
DOP2 (Prod, t, DLAM (na, c))
| c1 = term; "->"; c2 = term ->
DOP2 (Prod, c1, DLAM (Anonymous, c2))
| "("; id = IDENT; cl = LIST1 term; ")" ->
let c = VAR (id_of_string id) in
DOPN (AppL, Array.of_list (c::cl))
| "("; cl = LIST1 term; ")" ->
begin match cl with
| [c] -> c
| _ -> DOPN (AppL, Array.of_list cl)
end
| "("; c = term; "::"; t = term; ")" ->
DOP2 (Cast, c, t)
| "<"; p = term; ">";
IDENT "Case"; c = term; ":"; "Ind"; id = IDENT; i = INT;
"of"; bl = LIST0 term; "end" ->
let ind = (path_of_string id,int_of_string i) in
let nc = List.length bl in
let dummy_pats = Array.create nc RegularPat in
let dummy_ci = [||],(ind,[||],nc,None,dummy_pats) in
DOPN (MutCase dummy_ci, Array.of_list (p :: c :: bl))
] ];
command:
[ [ "Definition"; id = IDENT; ":="; c = term; "." ->
Definition (id_of_string id, None, c)
| "Definition"; id = IDENT; ":"; t = term; ":="; c = term; "." ->
Definition (id_of_string id, Some t, c)
| "Parameter"; id = IDENT; ":"; t = term; "." ->
Parameter (id_of_string id, t)
| "Variable"; id = IDENT; ":"; t = term; "." ->
Variable (id_of_string id, t)
| "Inductive"; "["; params = LIST0 nametype SEP ";"; "]";
inds = LIST1 inductive SEP "with" ->
Inductive (params, inds)
| IDENT "Check"; c = term; "." ->
Check c
| EOI -> raise End_of_file
] ];
inductive:
[ [ id = IDENT; ":"; ar = term; ":="; constrs = LIST0 constructor SEP "|" ->
(id_of_string id,ar,constrs)
] ];
constructor:
[ [ id = IDENT; ":"; c = term -> (id_of_string id,c) ] ];
END
(* Pretty-print. *)
let print_univers = ref false
let print_casts = ref false
let print_type u =
let sp = u.u_sp and num = u.u_num in
[< 'sTR "Type";
if !print_univers then
[< 'sTR "("; print_id (basename sp); 'sPC; 'iNT num >]
else
[< >]
>]
let print_name = function
| Anonymous -> [< 'sTR "_" >]
| Name id -> print_id id
let print_rel bv n = print_name (List.nth bv (pred n))
let rename bv = function
| Anonymous -> Anonymous
| Name id as na ->
let idl =
List.fold_left
(fun l n -> match n with Name x -> x::l | _ -> l) [] bv
in
if List.mem na bv then Name (next_ident_away id idl) else na
let rec pp bv = function
| DOP0 (Sort (Prop Pos)) -> [< 'sTR "Set" >]
| DOP0 (Sort (Prop Null)) -> [< 'sTR "Prop" >]
| DOP0 (Sort (Type u)) -> print_type u
| DOP2 (Lambda, t, DLAM(na, c)) ->
[< 'sTR"["; print_name na; 'sTR":"; pp bv t; 'sTR"]"; pp (na::bv) c >]
| DOP2 (Prod, t, DLAM(Anonymous, c)) ->
[< pp bv t; 'sTR"->"; pp (Anonymous::bv) c >]
| DOP2 (Prod, t, DLAM(na, c)) ->
[< 'sTR"("; print_name na; 'sTR":"; pp bv t; 'sTR")"; pp (na::bv) c >]
| DOP2 (Cast, c, t) ->
if !print_casts then
[< 'sTR"("; pp bv c; 'sTR"::"; pp bv t; 'sTR")" >]
else
pp bv c
| DOPN (AppL, [|c|]) ->
pp bv c
| DOPN (AppL, v) ->
[< 'sTR"("; prvect_with_sep (fun () -> [< 'sPC >]) (pp bv) v; 'sTR")" >]
| DOPN (Const sp, _) ->
[< 'sTR"Const "; print_id (basename sp) >]
| DOPN (MutInd (sp,i), _) ->
[< 'sTR"Ind "; print_id (basename sp); 'sTR" "; 'iNT i >]
| DOPN (MutConstruct ((sp,i),j), _) ->
[< 'sTR"Construct "; print_id (basename sp); 'sTR" "; 'iNT i;
'sTR" "; 'iNT j >]
| VAR id -> print_id id
| Rel n -> print_rel bv n
| _ -> [< 'sTR"<???>" >]
let pr_term _ ctx = pp (fold_rel_context (fun _ (n,_,_) l -> n::l) ctx [])
|
