| author | wenzelm |
| Wed, 20 Feb 2002 00:53:53 +0100 | |
| changeset 12902 | a23dc0b7566f |
| parent 11194 | ea13ff5a26d1 |
| child 13786 | ab8f39f48a6f |
| permissions | -rw-r--r-- |
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(* Title: HOL/UNITY/TimerArray.thy |
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ID: $Id$ |
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Author: Lawrence C Paulson, Cambridge University Computer Laboratory |
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Copyright 1998 University of Cambridge |
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A trivial example of reasoning about an array of processes |
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*) |
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TimerArray = PPROD + |
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types 'a state = "nat * 'a" (*second component allows new variables*) |
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constdefs |
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count :: "'a state => nat" |
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"count s == fst s" |
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decr :: "('a state * 'a state) set"
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"decr == UN n uu. {((Suc n, uu), (n,uu))}"
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Timer :: 'a state program |
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"Timer == mk_program (UNIV, {decr}, UNIV)"
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end |