src/CCL/ex/stream.thy
author paulson
Mon Dec 07 18:26:25 1998 +0100 (1998-12-07)
changeset 6019 0e55c2fb2ebb
parent 290 37d580c16af5
permissions -rw-r--r--
tidying
     1 (*  Title: 	CCL/ex/stream.thy
     2     ID:         $Id$
     3     Author: 	Martin Coen, Cambridge University Computer Laboratory
     4     Copyright   1993  University of Cambridge
     5 
     6 Programs defined over streams.
     7 *)
     8 
     9 Stream = List + 
    10 
    11 consts
    12 
    13   iter1,iter2   ::  "[i=>i,i]=>i"
    14 
    15 rules 
    16 
    17   iter1_def   "iter1(f,a) == letrec iter x be x$iter(f(x)) in iter(a)"
    18   iter2_def   "iter2(f,a) == letrec iter x be x$map(f,iter(x)) in iter(a)"
    19 
    20 end