+++ /dev/null
-(* Copyright (C) 2005, 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://helm.cs.unibo.it/
- *)
-
-(* $Id$ *)
-
-open Printf
-
-module Ast = CicNotationPt
-module Env = CicNotationEnv
-module Pp = CicNotationPp
-module Util = CicNotationUtil
-
-let get_tag term0 =
- let subterms = ref [] in
- let map_term t =
- subterms := t :: !subterms ;
- Ast.Implicit
- in
- let rec aux t = CicNotationUtil.visit_ast ~special_k map_term t
- and special_k = function
- | Ast.AttributedTerm (_, t) -> aux t
- | _ -> assert false
- in
- let term_mask = aux term0 in
- let tag = Hashtbl.hash term_mask in
- tag, List.rev !subterms
-
-module Matcher21 =
-struct
- module Pattern21 =
- struct
- type pattern_t = Ast.term
- type term_t = Ast.term
- let rec classify = function
- | Ast.AttributedTerm (_, t) -> classify t
- | Ast.Variable _ -> PatternMatcher.Variable
- | Ast.Magic _
- | Ast.Layout _
- | Ast.Literal _ -> assert false
- | _ -> PatternMatcher.Constructor
- let tag_of_pattern = get_tag
- let tag_of_term t = get_tag t
- let string_of_term = CicNotationPp.pp_term
- let string_of_pattern = CicNotationPp.pp_term
- end
-
- module M = PatternMatcher.Matcher (Pattern21)
-
- let extract_magic term =
- let magic_map = ref [] in
- let add_magic m =
- let name = Util.fresh_name () in
- magic_map := (name, m) :: !magic_map;
- Ast.Variable (Ast.TermVar name)
- in
- let rec aux = function
- | Ast.AttributedTerm (_, t) -> assert false
- | Ast.Literal _
- | Ast.Layout _ -> assert false
- | Ast.Variable v -> Ast.Variable v
- | Ast.Magic m -> add_magic m
- | t -> Util.visit_ast aux t
- in
- let term' = aux term in
- term', !magic_map
-
- let env_of_matched pl tl =
- try
- List.map2
- (fun p t ->
- match p, t with
- Ast.Variable (Ast.TermVar name), _ ->
- name, (Env.TermType, Env.TermValue t)
- | Ast.Variable (Ast.NumVar name), (Ast.Num (s, _)) ->
- name, (Env.NumType, Env.NumValue s)
- | Ast.Variable (Ast.IdentVar name), (Ast.Ident (s, None)) ->
- name, (Env.StringType, Env.StringValue s)
- | _ -> assert false)
- pl tl
- with Invalid_argument _ -> assert false
-
- let rec compiler rows =
- let rows', magic_maps =
- List.split
- (List.map
- (fun (p, pid) ->
- let p', map = extract_magic p in
- (p', pid), (pid, map))
- rows)
- in
- let magichecker map =
- List.fold_left
- (fun f (name, m) ->
- let m_checker = compile_magic m in
- (fun env ctors ->
- match m_checker (Env.lookup_term env name) env ctors with
- | None -> None
- | Some (env, ctors) -> f env ctors))
- (fun env ctors -> Some (env, ctors))
- map
- in
- let magichooser candidates =
- List.fold_left
- (fun f (pid, pl, checker) ->
- (fun matched_terms constructors ->
- let env = env_of_matched pl matched_terms in
- match checker env constructors with
- | None -> f matched_terms constructors
- | Some (env, ctors') ->
- let magic_map =
- try List.assoc pid magic_maps with Not_found -> assert false
- in
- let env' = Env.remove_names env (List.map fst magic_map) in
- Some (env', ctors', pid)))
- (fun _ _ -> None)
- (List.rev candidates)
- in
- let match_cb rows =
- let candidates =
- List.map
- (fun (pl, pid) ->
- let magic_map =
- try List.assoc pid magic_maps with Not_found -> assert false
- in
- pid, pl, magichecker magic_map)
- rows
- in
- magichooser candidates
- in
- M.compiler rows' match_cb (fun _ -> None)
-
- and compile_magic = function
- | Ast.Fold (kind, p_base, names, p_rec) ->
- let p_rec_decls = Env.declarations_of_term p_rec in
- (* LUCA: p_rec_decls should not contain "names" *)
- let acc_name = try List.hd names with Failure _ -> assert false in
- let compiled_base = compiler [p_base, 0]
- and compiled_rec = compiler [p_rec, 0] in
- (fun term env ctors ->
- let aux_base term =
- match compiled_base term with
- | None -> None
- | Some (env', ctors', _) -> Some (env', ctors', [])
- in
- let rec aux term =
- match compiled_rec term with
- | None -> aux_base term
- | Some (env', ctors', _) ->
- begin
- let acc = Env.lookup_term env' acc_name in
- let env'' = Env.remove_name env' acc_name in
- match aux acc with
- | None -> aux_base term
- | Some (base_env, ctors', rec_envl) ->
- let ctors'' = ctors' @ ctors in
- Some (base_env, ctors'',env'' :: rec_envl)
- end
- in
- match aux term with
- | None -> None
- | Some (base_env, ctors, rec_envl) ->
- let env' =
- base_env @ Env.coalesce_env p_rec_decls rec_envl @ env
- (* @ env LUCA!!! *)
- in
- Some (env', ctors))
-
- | Ast.Default (p_some, p_none) -> (* p_none can't bound names *)
- let p_some_decls = Env.declarations_of_term p_some in
- let p_none_decls = Env.declarations_of_term p_none in
- let p_opt_decls =
- List.filter
- (fun decl -> not (List.mem decl p_none_decls))
- p_some_decls
- in
- let none_env = List.map Env.opt_binding_of_name p_opt_decls in
- let compiled = compiler [p_some, 0] in
- (fun term env ctors ->
- match compiled term with
- | None -> Some (none_env, ctors) (* LUCA: @ env ??? *)
- | Some (env', ctors', 0) ->
- let env' =
- List.map
- (fun (name, (ty, v)) as binding ->
- if List.exists (fun (name', _) -> name = name') p_opt_decls
- then Env.opt_binding_some binding
- else binding)
- env'
- in
- Some (env' @ env, ctors' @ ctors)
- | _ -> assert false)
-
- | Ast.If (p_test, p_true, p_false) ->
- let compiled_test = compiler [p_test, 0]
- and compiled_true = compiler [p_true, 0]
- and compiled_false = compiler [p_false, 0] in
- (fun term env ctors ->
- let branch =
- match compiled_test term with
- | None -> compiled_false
- | Some _ -> compiled_true
- in
- match branch term with
- | None -> None
- | Some (env', ctors', _) -> Some (env' @ env, ctors' @ ctors))
-
- | Ast.Fail -> (fun _ _ _ -> None)
-
- | _ -> assert false
-end
-
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