MixIn Structure

 

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The latest version of this topic can be found at MixIn Structure.

Ensures that a runtime class derives from Windows Runtime interfaces, if any, and then classic COM interfaces.

template<  
   typename Derived,  
   typename MixInType,  
   bool hasImplements = __is_base_of(Details::ImplementsBase,  
   MixInType)  
>  
struct MixIn;  

Parameters

Derived
A type derived from the Implements structure.

MixInType
A base type.

hasImplements
true if MixInType is derived from the current implementation the base type; false otherwise.

If a class is derived from both Windows Runtime and class COM interfaces, the class declaration list must first list any Windows Runtime interfaces and then any classic COM interfaces. MixIn ensures that the interfaces are specified in the correct order.

MixIn

Header: implements.h

Namespace: Microsoft::WRL

Microsoft::WRL Namespace

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