case (C++)

Статья
10/16/2008

Used with the switch_type attribute in a union.

[ case(
      value
) ]

Параметры

value
A possible input value for which you want to provide processing. The type of value can be one of the following types:
- int
- char
- boolean
- enum
or an identifier of such a type.

Заметки

The case C++ attribute has the same functionality as the case MIDL attribute. This attribute is only used with the switch_type attribute.

Пример

The following code shows a use of the case attribute:

// cpp_attr_ref_case.cpp
// compile with: /LD
#include <unknwn.h>
[export]
struct SizedValue2 {
   [switch_type(char), switch_is(kind)] union {
      [case(1), string]
          wchar_t* wval;
      [default, string]
          char* val;
   };
    char kind;
};
[module(name="ATLFIRELib")];