/* 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/.
 */

/*  AUTOR: Ferruccio Guidi <fguidi@cs.unibo.it>
 */

%{
   let f (x, y, z) = x
   let s (x, y, z) = y
   let t (x, y, z) = z

   let builtin s = 
      let ns = "http://www.cs.unibo.it/helm/schemas/schema-helm#" in
      match s with
         | "MH"   -> ns ^ "MainHypothesis"
         | "IH"   -> ns ^ "InHypothesis"
         | "MC"   -> ns ^ "MainConclusion"
         | "IC"   -> ns ^ "InConclusion"
         | "IB"   -> ns ^ "InBody"
         | "SET"  ->      "Set"
         | "PROP" ->      "Prop"
         | "TYPE" ->      "Type"
         | _      -> raise Parsing.Parse_error

   module G = MQueryGenerator
%}
   %token <string> ID
   %token <UriManager.uri> CONURI
   %token <UriManager.uri> VARURI
   %token <UriManager.uri * int> INDTYURI
   %token <UriManager.uri * int * int> INDCONURI
   %token ALIAS EOF

   %start interp
   %type  <CicTextualParser0.interpretation_domain_item -> CicTextualParser0.interpretation_codomain_item option> interp
   
   %token <string> STR
   %token DL DQ LC RC CM 
   %token MOBJ MSORT MREL OOBJ OSORT OREL UNIV
   
   %start qstr specs
   %type  <string>                    qstr
   %type  <MQueryGenerator.spec list> specs
%%
   uri:
      | CONURI    { CicTextualParser0.ConUri $1                           }
      | VARURI    { CicTextualParser0.VarUri $1                           }
      | INDTYURI  { CicTextualParser0.IndTyUri ((fst $1), (snd $1))       }
      | INDCONURI { CicTextualParser0.IndConUri ((f $1), (s $1), (t $1))  }
   ;
   alias:      
      | ALIAS ID uri { ($2, CicTextualParser0.Uri $3) }
   ;
   aliases:
      | alias aliases { $1 :: $2 } 
      | EOF           { []       }
   ;
   interp:
      | aliases { function CicTextualParser0.Id s -> (try Some (List.assoc s $1) 
                                    with Not_found -> None)
			 | _ -> None }
   ;

   qstr:
      | DQ       { ""      }
      | STR qstr { $1 ^ $2 }
   ;
   str:
      | STR   { $1         }
      | DL ID { builtin $2 }
   ;
   strs:
      | str CM strs { $1 :: $3 }
      | str         { [$1]     }
      |             { []       }
   ;
   list:
      | LC strs RC { $2 }
   ;
   spec:
      | MOBJ  list list list { G.MustObj  ($2, $3, $4) }
      | MSORT list list list { G.MustSort ($2, $3, $4) }
      | MREL  list list      { G.MustRel  ($2, $3)     }
      | OOBJ  list list list { G.OnlyObj  ($2, $3, $4) }
      | OSORT list list list { G.OnlySort ($2, $3, $4) }
      | OREL  list list      { G.OnlyRel  ($2, $3)     }
      | UNIV  list           { G.Universe $2           }
   ;   
   specs:
      | spec specs { $1 :: $2 }
      | EOF        { []       }
   ;