(* Title: HOL/IOA/example/Impl.thy
ID: $Id$
Author: Tobias Nipkow & Konrad Slind
Copyright 1994 TU Muenchen
The implementation
*)
Impl = Sender + Receiver + Abschannel +
types
'm impl_state
= "'m sender_state * 'm receiver_state * 'm packet list * bool list"
(* sender_state * receiver_state * srch_state * rsch_state *)
constdefs
impl_ioa :: ('m action, 'm impl_state)ioa
"impl_ioa == (sender_ioa || receiver_ioa || srch_ioa || rsch_ioa)"
sen :: 'm impl_state => 'm sender_state
"sen == fst"
rec :: 'm impl_state => 'm receiver_state
"rec == fst o snd"
srch :: 'm impl_state => 'm packet list
"srch == fst o snd o snd"
rsch :: 'm impl_state => bool list
"rsch == snd o snd o snd"
end