Theory State

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theory State
imports Exceptions

(*  Title:      Jinja/J/State.thy

    Author:     Tobias Nipkow
    Copyright   2003 Technische Universitaet Muenchen
*)

header {* \isaheader{Program State} *}

theory State imports "../Common/Exceptions" begin

type_synonym
  locals = "vname \<rightharpoonup> val"      -- "local vars, incl. params and ``this''"
type_synonym
  state  = "heap × locals"

definition hp :: "state => heap"
where
  "hp  ≡  fst"
definition lcl :: "state => locals"
where
  "lcl  ≡  snd"

(*<*)
declare hp_def[simp] lcl_def[simp]
(*>*)
end