variantchangetype problems COM interoperability C++/CLI

[nabil035]

hi,

I'm writing a wrapper from unmanaged C++ to C++/CLI

I've replaced the variant_type by
a structure:
Type_Value
{
SupportedTypes Type,
String^ Value
}
Supported_Types //enm type
{
types written in hand
}

well, this is working very good and this is suitable for me
but now I need the results of variantchangety pe cuz I'm developping an OPC server and this is the general method to use

I have many ideas but I want to hear from you experts if there's any solution or other ways to wrap variant types

thx in advance.

[weaknessforcats]

Let's call this by it;s real name: a typecast.

You typecast in C++ if a) you are calling a relic C function, or b) your C++ design is screwed up.

Your C++ object should be able to change it's type by a) implementing the State design pattern, or b) using conversion operators.

Not knowing your situation, I don't know which is better.

[nabil035]

thx can u give me an idea about this State Pattern or give me a useful link.

[Banfa]

State Design Pattern