src/HOL/HOLCF/IOA/ABP/Impl.thy
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(*  Title:      HOL/HOLCF/IOA/ABP/Impl.thy
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    Author:     Olaf Müller
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*)
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section {* The implementation *}
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theory Impl
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imports Sender Receiver Abschannel
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begin
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type_synonym
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  'm impl_state = "'m sender_state * 'm receiver_state * 'm packet list * bool list"
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  (*  sender_state   *  receiver_state   *    srch_state  * rsch_state *)
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definition
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 impl_ioa :: "('m action, 'm impl_state)ioa" where
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 "impl_ioa = (sender_ioa || receiver_ioa || srch_ioa || rsch_ioa)"
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definition
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 sen :: "'m impl_state => 'm sender_state" where
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 "sen = fst"
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definition
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 rec :: "'m impl_state => 'm receiver_state" where
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 "rec = fst o snd"
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definition
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 srch :: "'m impl_state => 'm packet list" where
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 "srch = fst o snd o snd"
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definition
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 rsch :: "'m impl_state => bool list" where
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 "rsch = snd o snd o snd"
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end