matita/matita/contribs/lambdadelta/basic_1A/subst/defs.ma

   1 (**************************************************************************)
   2 (*       ___                                                              *)
   3 (*      ||M||                                                             *)
   4 (*      ||A||       A project by Andrea Asperti                           *)
   5 (*      ||T||                                                             *)
   6 (*      ||I||       Developers:                                           *)
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  10 (*       \ /        This file is distributed under the terms of the       *)
  11 (*        v         GNU General Public License Version 2                  *)
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  13 (**************************************************************************)
  14
  15 (* This file was automatically generated: do not edit *********************)
  16
  17 include "basic_1A/lift/defs.ma".
  18
  19 rec definition subst (d: nat) (v: T) (t: T) on t: T \def match t with [(TSort
  20 n) \Rightarrow (TSort n) | (TLRef i) \Rightarrow (match (blt i d) with [true
  21 \Rightarrow (TLRef i) | false \Rightarrow (match (blt d i) with [true
  22 \Rightarrow (TLRef (pred i)) | false \Rightarrow (lift d O v)])]) | (THead k
  23 u t0) \Rightarrow (THead k (subst d v u) (subst (s k d) v t0))].
  24