src/HOL/Tools/ATP/res_clasimpset.ML

Moved some of the clausify functions from ATP/res_clasimpset.ML to res_axioms.ML.
Changed watcher.ML so that the Unix.execute and Unix.reap functions are used instead of those in modUnix.ML, and
consequently removed modUnix.ML from Reconstruction.thy

(*  ID:         $Id$

    Author:     Claire Quigley
    Copyright   2004  University of Cambridge
*)

signature RES_CLASIMP =
  sig
     val write_out_clasimp :string -> (ResClause.clause * Thm.thm) Array.array * int
  end;

structure ResClasimp : RES_CLASIMP =
struct
fun has_name th = not((Thm.name_of_thm th )= "")
fun has_name_pair (a,b) = not_equal a "";

fun stick []  = []
|   stick (x::xs)  = x@(stick xs )

fun filterlist p [] = []
|   filterlist p (x::xs) = if p x 
                           then 
                               (x::(filterlist p xs))
                           else
                               filterlist p xs


(* changed, now it also finds out the name of the theorem. *)
(* convert a theorem into CNF and then into Clause.clause format. *)

(* outputs a list of (thm,clause) pairs *)


(* for tracing: encloses each string element in brackets. *)
fun concat_with_stop [] = ""
  | concat_with_stop [x] =  x
  | concat_with_stop (x::xs) = x^ "." ^ concat_with_stop xs;

fun remove_symb str = if String.isPrefix  "List.op @." str
                      then 
                          ((String.substring(str,0,5))^(String.extract (str, 10, NONE)))
                      else
                          str

fun remove_spaces str = let val strlist = String.tokens Char.isSpace str
                            val spaceless = concat strlist
                            val strlist' = String.tokens Char.isPunct spaceless
                        in
                            concat_with_stop strlist'
                        end

fun remove_symb_pair (str, thm) = let val newstr = remove_symb str
                                  in
                                    (newstr, thm)
                                  end


fun remove_spaces_pair (str, thm) = let val newstr = remove_spaces str
                                  in
                                    (newstr, thm)
                                  end




(*Insert th into the result provided the name is not "".*)
fun add_nonempty ((name,th), ths) = if name="" then ths else th::ths;


fun write_out_clasimp filename = let
					val claset_rules = ResAxioms.claset_rules_of_thy (the_context());
					val named_claset = filterlist has_name_pair claset_rules;
					val claset_names = map remove_spaces_pair (named_claset)
					val claset_cls_thms = #1( ResAxioms.clausify_rules_pairs named_claset []);


					val simpset_rules = ResAxioms.simpset_rules_of_thy (the_context());
					val named_simpset = map remove_spaces_pair (filterlist has_name_pair simpset_rules);
					val simpset_cls_thms = #1 (ResAxioms.clausify_rules_pairs named_simpset []);

					val cls_thms = (claset_cls_thms@simpset_cls_thms);
					val cls_thms_list = stick cls_thms;

                                        (*********************************************************)
                                  	(* create array and put clausename, number pairs into it *)
                                   	(*********************************************************)
					val num_of_clauses =  0;
                                     	val clause_arr = Array.fromList cls_thms_list;
              
                                   	val  num_of_clauses= (List.length cls_thms_list);

                                        (*************************************************)
					(* Write out clauses as tptp strings to filename *)
 					(*************************************************)
                                        val clauses = map #1(cls_thms_list);
          				val cls_tptp_strs = map ResClause.tptp_clause clauses;
                                        (* list of lists of tptp string clauses *)
                                        val stick_clasrls =   stick cls_tptp_strs;
    					val out = TextIO.openOut filename;
                                    	val _=   ResLib.writeln_strs out stick_clasrls;
                                    	val _= TextIO.flushOut out;
					val _= TextIO.closeOut out
                     		  in
					(clause_arr, num_of_clauses)
				  end;


end;