1) all theorems in Orderings can now be given as a parameter
2) new function Theory.defs_of
3) new functions Defs.overloading_info and Defs.is_overloaded
(*<*)
theory fakenat imports Main begin;
(*>*)
text{*\noindent
The type \tydx{nat} of natural
numbers is predefined to have the constructors \cdx{0} and~\cdx{Suc}. It behaves as if it were declared like this:
*}
datatype nat = 0 | Suc nat
(*<*)
end
(*>*)