matitaB/matita/contribs/ng_assembly2/compiler/ast_base_type_base.ma

   1 (**************************************************************************)
   2 (*       ___                                                              *)
   3 (*      ||M||                                                             *)
   4 (*      ||A||       A project by Andrea Asperti                           *)
   5 (*      ||T||                                                             *)
   6 (*      ||I||       Developers:                                           *)
   7 (*      ||T||         The HELM team.                                      *)
   8 (*      ||A||         http://helm.cs.unibo.it                             *)
   9 (*      \   /                                                             *)
  10 (*       \ /        This file is distributed under the terms of the       *)
  11 (*        v         GNU General Public License Version 2                  *)
  12 (*                                                                        *)
  13 (**************************************************************************)
  14
  15 (* ********************************************************************** *)
  16 (*                          Progetto FreeScale                            *)
  17 (*                                                                        *)
  18 (*   Sviluppato da: Ing. Cosimo Oliboni, oliboni@cs.unibo.it              *)
  19 (*   Sviluppo: 2008-2010                                                  *)
  20 (*                                                                        *)
  21 (* ********************************************************************** *)
  22
  23 include "num/bool.ma".
  24
  25 (* ************************* *)
  26 (* dimensioni degli elementi *)
  27 (* ************************* *)
  28
  29 (* usato per definire nell'ast *)
  30 ninductive ast_base_type : Type ≝
  31   AST_BASE_TYPE_BYTE8: ast_base_type
  32 | AST_BASE_TYPE_WORD16: ast_base_type
  33 | AST_BASE_TYPE_WORD32: ast_base_type.
  34
  35 (* iteratore *)
  36 ndefinition forall_astbasetype ≝ λP.
  37  P AST_BASE_TYPE_BYTE8 ⊗
  38  P AST_BASE_TYPE_WORD16 ⊗
  39  P AST_BASE_TYPE_WORD32.
  40
  41 ndefinition eq_astbasetype ≝
  42 λt1,t2:ast_base_type.match t1 with
  43  [ AST_BASE_TYPE_BYTE8 ⇒ match t2 with [ AST_BASE_TYPE_BYTE8 ⇒ true | _ ⇒ false ]
  44  | AST_BASE_TYPE_WORD16 ⇒ match t2 with [ AST_BASE_TYPE_WORD16 ⇒ true | _ ⇒ false ]
  45  | AST_BASE_TYPE_WORD32 ⇒ match t2 with [ AST_BASE_TYPE_WORD32 ⇒ true | _ ⇒ false ]
  46  ].
  47