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(* Title: HOL/IOA/example/Spec.thy
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ID: $Id$
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Author: Olaf Mueller
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Copyright 1997 TU Muenchen
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The implementation of a memory
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*)
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Impl = IOA + Action +
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consts
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impl_sig :: "action signature"
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impl_trans :: "(action, nat * bool)transition set"
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impl_ioa :: "(action, nat * bool)ioa"
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defs
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sig_def "impl_sig == (UN l.{Free l} Un {New},
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UN l.{Loc l},
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{})"
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trans_def "impl_trans ==
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{tr. let s = fst(tr); k = fst s; b = snd s;
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t = snd(snd(tr)); k' = fst t; b' = snd t
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in
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case fst(snd(tr))
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of
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New => k' = k & b' |
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Loc l => b & l= k & k'= (Suc k) & ~b' |
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Free l => k'=k & b'=b}"
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ioa_def "impl_ioa == (impl_sig, {(0,False)}, impl_trans,{},{})"
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end
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