unions and /clr

[Peteroid]

I believe this is not allowed:

union comboVar
{
int i;
double d ;
};

ref class myClass
{
comboVar m_Var_1 ; // error, no unions in ref class
comboVar* m_Var_2 ; // error no pointers either
comboVar^ m_Var_3 ; // error, not these either
} ;

Is there a /clr union equivalent?

[==P==]

[Carl Daniel [VC++ MVP]]

Peteroid wrote:

I believe this is not allowed:

union comboVar
{
int i;
double d ;
};

ref class myClass
{
comboVar m_Var_1 ; // error, no unions in ref class
comboVar* m_Var_2 ; // error no pointers either
comboVar^ m_Var_3 ; // error, not these either
} ;

Is there a /clr union equivalent?

No, there is not. The CLR doesn't support unions.

-cd

[Austin Ehlers]

On Sun, 13 Nov 2005 16:04:43 -0800, "Carl Daniel [VC++ MVP]"
<cp*****************************@mvps.org.nospam > wrote:

Peteroid wrote:

I believe this is not allowed:

union comboVar
{
int i;
double d ;
};

ref class myClass
{
comboVar m_Var_1 ; // error, no unions in ref class
comboVar* m_Var_2 ; // error no pointers either
comboVar^ m_Var_3 ; // error, not these either
} ;

Is there a /clr union equivalent?

No, there is not. The CLR doesn't support unions.

-cd

Actually, you can simulate unions with explicit layouts and field
offests. Ex:

using namespace System::Runtime::InteropServices;

[StructLayout(LayoutKind::Explicit)]
value class comboVar
{
public:
[FieldOffset(0)]
int i;
[FieldOffset(0)]
double d;

};

Austin