appliance.tcl

linux 下的源代码分析阅读器 red hat公司新版

# ----------------------------------------------------------------------
#  PURPOSE:  Base class for all electrical appliances that interact
#            with Outlets.
#
#   AUTHOR:  Michael J. McLennan       Phone: [phone]
#            AT&T Bell Laboratories   E-mail: [e-mail]
#
#      RCS:  $Id: Appliance.tcl 144 2003-02-05 10:56:26Z mdejong $
# ----------------------------------------------------------------------
#               Copyright (c) 1993  AT&T Bell Laboratories
# ======================================================================
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose and without fee is hereby granted,
# provided that the above copyright notice appear in all copies and that
# both that the copyright notice and warranty disclaimer appear in
# supporting documentation, and that the names of AT&T Bell Laboratories
# any of their entities not be used in advertising or publicity
# pertaining to distribution of the software without specific, written
# prior permission.
#
# AT&T disclaims all warranties with regard to this software, including
# all implied warranties of merchantability and fitness.  In no event
# shall AT&T be liable for any special, indirect or consequential
# damages or any damages whatsoever resulting from loss of use, data or
# profits, whether in an action of contract, negligence or other
# tortuous action, arising out of or in connection with the use or
# performance of this software.
# ======================================================================

itcl_class Appliance {

	method power {power} {
		if {[itcl_info objects [info which $outlet]] == ""} {
			set outlet {}
		}
		if {$outlet == ""} {
			error "cannot use $this: not plugged in"
		}
		$outlet use $power
	}

	public outlet {}
}