(* Title: HOL/MicroJava/J/Type.thy
Author: David von Oheimb
Copyright 1999 Technische Universitaet Muenchen
*)
section \<open>Java types\<close>
theory Type imports JBasis begin
typedecl cnam
instantiation cnam :: equal
begin
definition "HOL.equal (cn :: cnam) cn' \<longleftrightarrow> cn = cn'"
instance by standard (simp add: equal_cnam_def)
end
text \<open>These instantiations only ensure that the merge in theory \<open>MicroJava\<close> succeeds. FIXME\<close>
instantiation cnam :: typerep
begin
definition "typerep_class.typerep \<equiv> \<lambda>_ :: cnam itself. Typerep.Typerep (STR ''Type.cnam'') []"
instance ..
end
instantiation cnam :: term_of
begin
definition "term_of_class.term_of (C :: cnam) \<equiv>
Code_Evaluation.Const (STR ''dummy_cnam'') (Typerep.Typerep (STR ''Type.cnam'') [])"
instance ..
end
instantiation cnam :: partial_term_of
begin
definition "partial_term_of_class.partial_term_of (C :: cnam itself) n = undefined"
instance ..
end
\<comment> "exceptions"
datatype
xcpt
= NullPointer
| ClassCast
| OutOfMemory
\<comment> "class names"
datatype cname
= Object
| Xcpt xcpt
| Cname cnam
typedecl vnam \<comment> "variable or field name"
instantiation vnam :: equal
begin
definition "HOL.equal (vn :: vnam) vn' \<longleftrightarrow> vn = vn'"
instance by standard (simp add: equal_vnam_def)
end
instantiation vnam :: typerep
begin
definition "typerep_class.typerep \<equiv> \<lambda>_ :: vnam itself. Typerep.Typerep (STR ''Type.vnam'') []"
instance ..
end
instantiation vnam :: term_of
begin
definition "term_of_class.term_of (V :: vnam) \<equiv>
Code_Evaluation.Const (STR ''dummy_vnam'') (Typerep.Typerep (STR ''Type.vnam'') [])"
instance ..
end
instantiation vnam :: partial_term_of
begin
definition "partial_term_of_class.partial_term_of (V :: vnam itself) n = undefined"
instance ..
end
typedecl mname \<comment> "method name"
instantiation mname :: equal
begin
definition "HOL.equal (M :: mname) M' \<longleftrightarrow> M = M'"
instance by standard (simp add: equal_mname_def)
end
instantiation mname :: typerep
begin
definition "typerep_class.typerep \<equiv> \<lambda>_ :: mname itself. Typerep.Typerep (STR ''Type.mname'') []"
instance ..
end
instantiation mname :: term_of
begin
definition "term_of_class.term_of (M :: mname) \<equiv>
Code_Evaluation.Const (STR ''dummy_mname'') (Typerep.Typerep (STR ''Type.mname'') [])"
instance ..
end
instantiation mname :: partial_term_of
begin
definition "partial_term_of_class.partial_term_of (M :: mname itself) n = undefined"
instance ..
end
\<comment> "names for \<open>This\<close> pointer and local/field variables"
datatype vname
= This
| VName vnam
\<comment> "primitive type, cf. 4.2"
datatype prim_ty
= Void \<comment> "'result type' of void methods"
| Boolean
| Integer
\<comment> "reference type, cf. 4.3"
datatype ref_ty
= NullT \<comment> "null type, cf. 4.1"
| ClassT cname \<comment> "class type"
\<comment> "any type, cf. 4.1"
datatype ty
= PrimT prim_ty \<comment> "primitive type"
| RefT ref_ty \<comment> "reference type"
abbreviation NT :: ty
where "NT == RefT NullT"
abbreviation Class :: "cname => ty"
where "Class C == RefT (ClassT C)"
end