The _Export function specifier (C++ only)

Use the _Export keyword with a function name to declare that it is to be exported (made available to other modules). You must define the function in the same translation unit in which you use the _Export keyword. For example:

   int _Export anthony(float);

The above statement exports the function anthony, if you define the function within the translation unit.

If you apply the _Export keyword to a class, the z/OS XL C++ compiler automatically exports all members of the class, whether static, public, private, or protected. However, if you want it to apply to individual class members, then you must apply it to each member that can be referenced. The following class definitions demonstrate this.

class A {
  public:
    int iii() {
      printf("Hi from A::iii()\n");
      aaa();
      printf("Call to A::ccc() returned %c\n", ccc());
      return 88;
    }
    static void _Export sss();
  protected:
    void _Export aaa();
  private:
    char _Export ccc();
};

class _Export B {
  public:
    int iii() {
      printf("Hi from B::iii()\n");
      aaa();
      printf("Call to B::ccc() returned %c\n", ccc());
      return 99;
    }
    static void sss();
  protected:
    void _Export aaa();
  private:
    char _Export ccc();
};

In the example below, both X::Print() and X::GetNext() will be exported.

           class _Export X {
             public:
                  ...
                  void static Print();
                  int GetNext();
                  ...
           };

           void X:: static Print() {
                  ...
           }
           int X::GetNext() {
                  ...
           }