Ast_helper.CtyClass type expressions
val mk : 
  ?loc:loc ->
  ?attrs:attrs ->
  Parsetree.class_type_desc ->
  Parsetree.class_typeval attr : Parsetree.class_type -> Parsetree.attribute -> Parsetree.class_typeval constr : 
  ?loc:loc ->
  ?attrs:attrs ->
  lid ->
  Parsetree.core_type list ->
  Parsetree.class_typeval signature : 
  ?loc:loc ->
  ?attrs:attrs ->
  Parsetree.class_signature ->
  Parsetree.class_typeval arrow : 
  ?loc:loc ->
  ?attrs:attrs ->
  Asttypes.arg_label ->
  Parsetree.core_type ->
  Parsetree.class_type ->
  Parsetree.class_typeval extension : 
  ?loc:loc ->
  ?attrs:attrs ->
  Parsetree.extension ->
  Parsetree.class_typeval open_ : 
  ?loc:loc ->
  ?attrs:attrs ->
  Parsetree.open_description ->
  Parsetree.class_type ->
  Parsetree.class_type