Theory Toy_Library_Static

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chapter‹Toy Libraries Static›
section‹Main Common Static Libraries›

theory Toy_Library_Static
imports Main
begin

text‹In case there are functions planned to be at the same time used by the compiler
(by the translating step) and 
also used by generated files, then these functions can be defined in this file.›

definition "map_of_list = (foldl ((λmap. (λ(x , l1). (case (map (x)) of None  (map (x  l1))
    | Some l0  (map (x  (concat ([l0 , l1])))))))) (Map.empty))"

definition "choose_0 = fst"
definition "choose_1 = snd"

definition "deref_assocs_list to_from oid S =
  concat (map (choose_1 o to_from) (filter (λp. List.member (choose_0 (to_from p)) oid) S))"

end