InterfaceTraits Structure

Article
07/11/2012

Supports the WRL infrastructure and is not intended to be used directly from your code.

template<
   typename I0
>
struct __declspec(novtable) InterfaceTraits;

template<
   typename CloakedType
>
struct __declspec(novtable) InterfaceTraits<CloakedIid<CloakedType>>;

template<>
struct __declspec(novtable) InterfaceTraits<Nil>;

Parameters

I0
The name of an interface.
CloakedType
For RuntimeClass, Implements and ChainInterfaces, an interface that won't be in the list of supported interface IDs.

Remarks

Implements common characteristics of an interface.

The second template is a specialization for cloaked interfaces. The third template is a specialization for Nil parameters.

Members

Public Typedefs

Name	Description
Base	A synonym for the I0 template parameter.

Public Methods

Name	Description
InterfaceTraits::CanCastTo Method	Indicates whether the specified pointer can be cast to a pointer to Base.
InterfaceTraits::CastToBase Method	Casts the specified pointer to a pointer to Base.
InterfaceTraits::CastToUnknown Method	Casts the specified pointer to a pointer to IUnknown.
InterfaceTraits::FillArrayWithIid Method	Assigns the interface ID of Base to the array element specified by the index argument.
InterfaceTraits::Verify Method	Verifies that Base is properly derived.

Public Constants

Name	Description
InterfaceTraits::IidCount Constant	Holds the number of interface IDs associated with the current InterfaceTraits object.

Inheritance Hierarchy

InterfaceTraits

Requirements

Header: implements.h

Namespace: Microsoft::WRL::Details

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