(* Title: HOL/Library/Reflection.thy
Author: Amine Chaieb, TU Muenchen
*)
header {* Generic reflection and reification *}
theory Reflection
imports Main
uses "reify_data.ML" ("reflection.ML")
begin
setup {* Reify_Data.setup *}
lemma ext2: "(\<forall>x. f x = g x) \<Longrightarrow> f = g"
by (blast intro: ext)
use "reflection.ML"
method_setup reify = {* fn src =>
Method.syntax (Attrib.thms --
Scan.option (Scan.lift (Args.$$$ "(") |-- Args.term --| Scan.lift (Args.$$$ ")") )) src #>
(fn ((eqs, to), ctxt) => Method.SIMPLE_METHOD' (Reflection.genreify_tac ctxt (eqs @ (fst (Reify_Data.get ctxt))) to))
*} "partial automatic reification"
method_setup reflection = {*
let
fun keyword k = Scan.lift (Args.$$$ k -- Args.colon) >> K ();
val onlyN = "only";
val rulesN = "rules";
val any_keyword = keyword onlyN || keyword rulesN;
val thms = Scan.repeat (Scan.unless any_keyword Attrib.multi_thm) >> flat;
val terms = thms >> map (term_of o Drule.dest_term);
fun optional scan = Scan.optional scan [];
in fn src =>
Method.syntax (thms -- optional (keyword rulesN |-- thms) -- Scan.option (keyword onlyN |-- Args.term)) src #>
(fn (((eqs,ths),to), ctxt) =>
let
val (ceqs,cths) = Reify_Data.get ctxt
val corr_thms = ths@cths
val raw_eqs = eqs@ceqs
in Method.SIMPLE_METHOD' (Reflection.reflection_tac ctxt corr_thms raw_eqs to)
end) end
*} "reflection method"
end