Dear all, recently, I stumbled upon the problem, that there is no proper fundef-cong rule for map on Option-types.
I added it manually to our developedment, but perhaps this should be integrated in Option.thy lemma option_map_cong[fundef_cong]: "xs = ys \<Longrightarrow> \<lbrakk>\<And> x. ys = Some x \<Longrightarrow> f x = g x\<rbrakk> \<Longrightarrow> Option.map f xs = Option.map g ys" by (cases ys, auto) Cheers, René _______________________________________________ isabelle-dev mailing list [email protected] https://mailmanbroy.informatik.tu-muenchen.de/mailman/listinfo/isabelle-dev
