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Generalized String Manipulation: Access Shims and Type Tunneling

Listing 4: Generalization via the preprocessor. Not very maintainable...

Listing 4: Generalization via the preprocessor. Not very maintainable...

  typedef std::string               string_t;
#elif defined(PPHACK_USE_CSTRING)
  typedef CString                   string_t;
 #if !defined(PPHACK_CUSTOM_TYPE)
  #error Must defined PPHACK_CUSTOM_TYPE with custom type
 #endif /* !PPHACK_CUSTOM_TYPE */
  typedef PPHACK_CUSTOM_TYPE        string_t;
 #error Must specify recognised PPHACK_USE_*** selector
#endif /* type */


  for(; begin != end; ++begin)
    // Add the item to the result ...
    string_t const  &s(*begin);

    ListBox_AddString(hwndList, s.c_str());
#elif defined(PPHACK_USE_CSTRING)
    ListBox_AddString(hwndList, static_cast<char const *>(s));
  #error Must defined PPHACK_ACCESS_CUSTOM_TYPE with custom type
    ListBox_AddString(hwndList, PPHACK_ACCESS_CUSTOM_TYPE(s));
 #error Must specify recognised PPHACK_USE_*** selector
#endif /* type */

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