+++ /dev/null
-(* Copyright (C) 2000, HELM Team.
- *
- * This file is part of HELM, an Hypertextual, Electronic
- * Library of Mathematics, developed at the Computer Science
- * Department, University of Bologna, Italy.
- *
- * HELM is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * HELM is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with HELM; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- *
- * For details, see the HELM World-Wide-Web page,
- * http://cs.unibo.it/helm/.
- *)
-
-(******************************************************************************)
-(* *)
-(* PROJECT HELM *)
-(* *)
-(* Claudio Sacerdoti Coen <sacerdot@cs.unibo.it> *)
-(* 24/01/2000 *)
-(* *)
-(* This module implements a very simple Coq-like pretty printer that, given *)
-(* an object of cic (internal representation) returns a string describing the *)
-(* object in a syntax similar to that of coq *)
-(* *)
-(******************************************************************************)
-
-exception CicPpInternalError;;
-exception NotEnoughElements;;
-
-(* Utility functions *)
-
-let ppname =
- function
- Cic.Name s -> s
- | Cic.Anonymous -> "_"
-;;
-
-(* get_nth l n returns the nth element of the list l if it exists or *)
-(* raises NotEnoughElements if l has less than n elements *)
-let rec get_nth l n =
- match (n,l) with
- (1, he::_) -> he
- | (n, he::tail) when n > 1 -> get_nth tail (n-1)
- | (_,_) -> raise NotEnoughElements
-;;
-
-(* pp t l *)
-(* pretty-prints a term t of cic in an environment l where l is a list of *)
-(* identifier names used to resolve DeBrujin indexes. The head of l is the *)
-(* name associated to the greatest DeBrujin index in t *)
-let rec pp t l =
- let module C = Cic in
- match t with
- C.Rel n ->
- begin
- try
- (match get_nth l n with
- Some (C.Name s) -> s
- | Some C.Anonymous -> "__" ^ string_of_int n
- | None -> "_hidden_" ^ string_of_int n
- )
- with
- NotEnoughElements -> string_of_int (List.length l - n)
- end
- | C.Var (uri,exp_named_subst) ->
- UriManager.string_of_uri (*UriManager.name_of_uri*) uri ^ pp_exp_named_subst exp_named_subst l
- | C.Meta (n,l1) ->
- "?" ^ (string_of_int n) ^ "[" ^
- String.concat " ; "
- (List.rev_map (function None -> "_" | Some t -> pp t l) l1) ^
- "]"
- | C.Sort s ->
- (match s with
- C.Prop -> "Prop"
- | C.Set -> "Set"
- | C.Type _ -> "Type" (* TASSI: universe is not explicit *)
- | C.CProp -> "CProp"
- )
- | C.Implicit _ -> "?"
- | C.Prod (b,s,t) ->
- (match b with
- C.Name n -> "(" ^ n ^ ":" ^ pp s l ^ ")" ^ pp t ((Some b)::l)
- | C.Anonymous -> "(" ^ pp s l ^ "->" ^ pp t ((Some b)::l) ^ ")"
- )
- | C.Cast (v,t) -> pp v l
- | C.Lambda (b,s,t) ->
- "[" ^ ppname b ^ ":" ^ pp s l ^ "]" ^ pp t ((Some b)::l)
- | C.LetIn (b,s,t) ->
- "[" ^ ppname b ^ ":=" ^ pp s l ^ "]" ^ pp t ((Some b)::l)
- | C.Appl li ->
- "(" ^
- (List.fold_right
- (fun x i -> pp x l ^ (match i with "" -> "" | _ -> " ") ^ i)
- li ""
- ) ^ ")"
- | C.Const (uri,exp_named_subst) ->
- UriManager.name_of_uri uri ^ pp_exp_named_subst exp_named_subst l
- | C.MutInd (uri,n,exp_named_subst) ->
- (try
- match CicEnvironment.get_obj uri with
- C.InductiveDefinition (dl,_,_) ->
- let (name,_,_,_) = get_nth dl (n+1) in
- name ^ pp_exp_named_subst exp_named_subst l
- | _ -> raise CicPpInternalError
- with
- _ -> UriManager.string_of_uri uri ^ "#1/" ^ string_of_int (n + 1)
- )
- | C.MutConstruct (uri,n1,n2,exp_named_subst) ->
- (try
- match CicEnvironment.get_obj uri with
- C.InductiveDefinition (dl,_,_) ->
- let (_,_,_,cons) = get_nth dl (n1+1) in
- let (id,_) = get_nth cons n2 in
- id ^ pp_exp_named_subst exp_named_subst l
- | _ -> raise CicPpInternalError
- with
- _ ->
- UriManager.string_of_uri uri ^ "#1/" ^ string_of_int (n1 + 1) ^ "/" ^
- string_of_int n2
- )
- | C.MutCase (uri,n1,ty,te,patterns) ->
- let connames =
- (match CicEnvironment.get_obj uri with
- C.InductiveDefinition (dl,_,_) ->
- let (_,_,_,cons) = get_nth dl (n1+1) in
- List.map (fun (id,_) -> id) cons
- | _ -> raise CicPpInternalError
- )
- in
- "\n<" ^ pp ty l ^ ">Cases " ^ pp te l ^ " of " ^
- List.fold_right (fun (x,y) i -> "\n " ^ x ^ " => " ^ pp y l ^ i)
- (List.combine connames patterns) "" ^
- "\nend"
- | C.Fix (no, funs) ->
- let snames = List.map (fun (name,_,_,_) -> name) funs in
- let names =
- List.rev (List.map (function name -> Some (C.Name name)) snames)
- in
- "\nFix " ^ get_nth snames (no + 1) ^ " {" ^
- List.fold_right
- (fun (name,ind,ty,bo) i -> "\n" ^ name ^ " / " ^ string_of_int ind ^
- " : " ^ pp ty l ^ " := \n" ^
- pp bo (names@l) ^ i)
- funs "" ^
- "}\n"
- | C.CoFix (no,funs) ->
- let snames = List.map (fun (name,_,_) -> name) funs in
- let names =
- List.rev (List.map (function name -> Some (C.Name name)) snames)
- in
- "\nCoFix " ^ get_nth snames (no + 1) ^ " {" ^
- List.fold_right
- (fun (name,ty,bo) i -> "\n" ^ name ^
- " : " ^ pp ty l ^ " := \n" ^
- pp bo (names@l) ^ i)
- funs "" ^
- "}\n"
-and pp_exp_named_subst exp_named_subst l =
- if exp_named_subst = [] then "" else
- "{" ^
- String.concat " ; " (
- List.map
- (function (uri,t) -> UriManager.name_of_uri uri ^ ":=" ^ pp t l)
- exp_named_subst
- ) ^ "}"
-;;
-
-let ppterm t =
- pp t []
-;;
-
-(* ppinductiveType (typename, inductive, arity, cons) *)
-(* pretty-prints a single inductive definition *)
-(* (typename, inductive, arity, cons) *)
-let ppinductiveType (typename, inductive, arity, cons) =
- (if inductive then "\nInductive " else "\nCoInductive ") ^ typename ^ ": " ^
- pp arity [] ^ " =\n " ^
- List.fold_right
- (fun (id,ty) i -> id ^ " : " ^ pp ty [] ^
- (if i = "" then "\n" else "\n | ") ^ i)
- cons ""
-;;
-
-(* ppobj obj returns a string with describing the cic object obj in a syntax *)
-(* similar to the one used by Coq *)
-let ppobj obj =
- let module C = Cic in
- let module U = UriManager in
- match obj with
- C.Constant (name, Some t1, t2, params) ->
- "Definition of " ^ name ^
- "(" ^ String.concat ";" (List.map UriManager.string_of_uri params) ^
- ")" ^ ":\n" ^ pp t1 [] ^ " : " ^ pp t2 []
- | C.Constant (name, None, ty, params) ->
- "Axiom " ^ name ^
- "(" ^ String.concat ";" (List.map UriManager.string_of_uri params) ^
- "):\n" ^ pp ty []
- | C.Variable (name, bo, ty, params) ->
- "Variable " ^ name ^
- "(" ^ String.concat ";" (List.map UriManager.string_of_uri params) ^
- ")" ^ ":\n" ^
- pp ty [] ^ "\n" ^
- (match bo with None -> "" | Some bo -> ":= " ^ pp bo [])
- | C.CurrentProof (name, conjectures, value, ty, params) ->
- "Current Proof of " ^ name ^
- "(" ^ String.concat ";" (List.map UriManager.string_of_uri params) ^
- ")" ^ ":\n" ^
- let separate s = if s = "" then "" else s ^ " ; " in
- List.fold_right
- (fun (n, context, t) i ->
- let conjectures',name_context =
- List.fold_right
- (fun context_entry (i,name_context) ->
- (match context_entry with
- Some (n,C.Decl at) ->
- (separate i) ^
- ppname n ^ ":" ^ pp at name_context ^ " ",
- (Some n)::name_context
- | Some (n,C.Def (at,None)) ->
- (separate i) ^
- ppname n ^ ":= " ^ pp at name_context ^ " ",
- (Some n)::name_context
- | None ->
- (separate i) ^ "_ :? _ ", None::name_context
- | _ -> assert false)
- ) context ("",[])
- in
- conjectures' ^ " |- " ^ "?" ^ (string_of_int n) ^ ": " ^
- pp t name_context ^ "\n" ^ i
- ) conjectures "" ^
- "\n" ^ pp value [] ^ " : " ^ pp ty []
- | C.InductiveDefinition (l, params, nparams) ->
- "Parameters = " ^
- String.concat ";" (List.map UriManager.string_of_uri params) ^ "\n" ^
- "NParams = " ^ string_of_int nparams ^ "\n" ^
- List.fold_right (fun x i -> ppinductiveType x ^ i) l ""
-;;
projects / helm.git / blobdiff