13.1.16 Typedefs

A typedef in OMG IDL is mapped to a typedef in C++. Depending upon the OMG IDL data type, additional typedefs and member functions may be defined. The generated code for each data type is as follows:

• Basic data types (short, long, unsigned short, unsigned long, float, double, char, boolean, and octet)

  Basic data types map to a simple typedef. For example:

  // OMG IDL
  typedef long ID;
  
  // C++
  typedef CORBA::Long ID;

• string

  A string typedef is mapped to a simple typedef. For example:

  // OMG IDL
  typedef string IDStr;
  
  // C++
  typedef char * IDStr;

• object, interfaces, TypeCode

  Object, interfaces, and TypeCode types are mapped to four typedefs. For example:

  // OMG IDL
  typedef Item Intf;
  
  // C++
  typedef Item Intf;
  typedef Item_ptr Intf_ptr;
  typedef Item_var Intf_var;
  typedef Item_ptr &Intf _out;

• enum, struct, union, sequence

  UDTs are mapped to three typedefs. For example:

  // OMG IDL
  typedef LogList ListRetType;
  
  // C++
  typedef LogList ListRetType;
  typedef LogList_var ListRetType_var;
  typedef LogList_out &ListRetType_out;

• array

  Arrays are mapped to four typedefs and the static member functions to allocate and free memory. For example:

  // OMG IDL
  typedef LogArray ArrayRetType;
  
  // C++
  typedef LogArray ArrayRetType;
  typedef LogArray_var ArrayRetType_var;
  typedef LogArray_forany ArrayRetType_forany;
  typedef LogArray_slice ArrayRetType_slice;
  ArrayRetType_slice * ArrayRetType_alloc();
  void ArrayRetType_free(ArrayRetType_slice *);