Mercurial Mercurial > repos > isabelle / file revision
summary | shortlog | changelog | graph | tags | bookmarks | branches | files | changeset | file | latest | revisions | annotate | diff | comparison | raw | help
Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
src/HOL/ex/Case_Product.thy
author paulson <lp15@cam.ac.uk>
Fri, 18 Feb 2022 21:40:01 +0000
changeset 75101 f0e2023f361a
parent 65563 e83c9e94e891
permissions -rw-r--r--
one new lemma

(*  Title:      HOL/ex/Case_Product.thy
    Author:     Lars Noschinski
    Copyright   2011 TU Muenchen
*)

section \<open>Examples for the 'case_product' attribute\<close>

theory Case_Product
imports Main
begin

text \<open>
  The @{attribute case_product} attribute combines multiple case distinction
  lemmas into a single case distinction lemma by building the product of all
  these case distinctions.
\<close>

lemmas nat_list_exhaust = nat.exhaust [case_product list.exhaust]

text \<open>The attribute honours preconditions.\<close>

lemmas trancl_acc_cases = trancl.cases [case_product acc.cases]

text \<open>Also, case names are generated based on the old names.\<close>

end
isabelle