Added conversion of reg.expr. to automata.
Renamed expand_const -> split_const.
(* Title: HOL/Lex/NA.thy
ID: $Id$
Author: Tobias Nipkow
Copyright 1998 TUM
Nondeterministic automata
*)
NA = List + AutoProj +
types ('a,'s)na = "'s * ('a => 's => 's set) * ('s => bool)"
syntax lift :: ('a => 'b set) => 'a set => 'b set
translations "lift f A" == "Union(f `` A)"
consts delta :: "('a,'s)na => 'a list => 's => 's set"
primrec delta list
"delta A [] p = {p}"
"delta A (a#w) p = lift (delta A w) (next A a p)"
constdefs
accepts :: ('a,'s)na => 'a list => bool
"accepts A w == ? q : delta A w (start A). fin A q"
end