src/CTT/Bool.thy
author clasohm
Mon Feb 05 14:44:09 1996 +0100 (1996-02-05)
changeset 1474 3f7d67927fe2
parent 0 a5a9c433f639
child 3837 d7f033c74b38
permissions -rw-r--r--
expanded tabs
     1 (*  Title:      CTT/bool
     2     ID:         $Id$
     3     Author:     Lawrence C Paulson, Cambridge University Computer Laboratory
     4     Copyright   1991  University of Cambridge
     5 
     6 The two-element type (booleans and conditionals)
     7 *)
     8 
     9 Bool = CTT +
    10 
    11 consts Bool             :: "t"
    12        true,false       :: "i"
    13        cond             :: "[i,i,i]=>i"
    14 rules
    15   Bool_def      "Bool == T+T"
    16   true_def      "true == inl(tt)"
    17   false_def     "false == inr(tt)"
    18   cond_def      "cond(a,b,c) == when(a, %u.b, %u.c)"
    19 end