Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All
COM
id
in
int
odl
out
ptr
ref
Expand Minimize

switch attribute

The switch keyword selects the discriminant for an encapsulated_union.


switch (switch-type switch-name)

Parameters

switch-type

Specifies an int, char, enum type, or an identifier that resolves to one of these types.

switch-name

Specifies the name of the variable of type switch-type that acts as the union discriminant.

Examples

typedef union _S1_TYPE switch (long l1) U1_TYPE 
{ 
    case 1024: 
        float f1; 
    case 2048: 
        double d2; 
} S1_TYPE; 
 
/* in generated header file */ 
typedef struct _S1_TYPE 
{ 
    long l1; 
    union 
    { 
        float f1; 
        double d2; 
    } U1_TYPE; 
} S1_TYPE;

See also

Interface Definition (IDL) File
Nonencapsulated Unions
switch_is
switch_type
union

 

 

Community Additions

ADD
Show:
© 2015 Microsoft