case (C++)
Used with the switch_type attribute in a union.
[ case(
value
) ]
Parameters
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.
Remarks
The case C++ attribute has the same functionality as the case MIDL attribute. This attribute is only used with the switch_type attribute.
Example
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")];
Requirements
Attribute Context
Applies to |
Member of a class or struct |
Repeatable |
No |
Required attributes |
None |
Invalid attributes |
None |
For more information about the attribute contexts, see Attribute Contexts.