ChainInterfaces Structure

Article
06/05/2017

The new home for Visual Studio documentation is Visual Studio 2017 Documentation on docs.microsoft.com.

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

Specifies verification and initialization functions that can be applied to a set of interface IDs.

Syntax

template <  
   typename I0,  
   typename I1,  
   typename I2 = Details::Nil,  
   typename I3 = Details::Nil,  
   typename I4 = Details::Nil,  
   typename I5 = Details::Nil,  
   typename I6 = Details::Nil,  
   typename I7 = Details::Nil,  
   typename I8 = Details::Nil,  
   typename I9 = Details::Nil  
>  
struct ChainInterfaces : I0;  
template <  
   typename DerivedType,  
   typename BaseType,  
   bool hasImplements,  
   typename I1,  
   typename I2,  
   typename I3,  
   typename I4,  
   typename I5,  
   typename I6,  
   typename I7,  
   typename I8,  
   typename I9  
>  
struct ChainInterfaces<MixIn<DerivedType, BaseType, hasImplements>, I1, I2, I3, I4, I5, I6, I7, I8, I9>;

Parameters

I0
(Required) Interface ID 0.

I1
(Required) Interface ID 1.

I2
(Optional) Interface ID 2.

I3
(Optional) Interface ID 3.

I4
(Optional) Interface ID 4.

I5
(Optional) Interface ID 5.

I6
(Optional) Interface ID 6.

I7
(Optional) Interface ID 7.

I8
(Optional) Interface ID 8.

I9
(Optional) Interface ID 9.

DerivedType
A derived type.

BaseType
The base type of a derived type.

hasImplements
A Boolean value that if true, means you can't use a MixIn structure with a class that does not derive from the Implements stucture.

Members

Protected Methods

Name	Description
ChainInterfaces::CanCastTo Method	Indicates whether the specified interface ID can be cast to each of the specializations defined by the ChainInterface template parameters.
ChainInterfaces::CastToUnknown Method	Casts the interface pointer of the type defined by the `I0` template parameter to a pointer to IUnknown.
ChainInterfaces::FillArrayWithIid Method	Stores the interface ID defined by the `I0` template parameter into a specified location in a specified array of interface IDs.
ChainInterfaces::Verify Method	Verifies that each interface defined by template parameters `I0` through `I9` inherits from IUnknown and/or IInspectable, and that `I0` inherits from `I1` through `I9`.

Protected Constants

Name	Description
ChainInterfaces::IidCount Constant	The total number of interface IDs contained in the interfaces specified by template parameters `I0` through `I9`.

Inheritance Hierarchy

I0

ChainInterfaces

Requirements

Header: implements.h

Namespace: Microsoft::WRL

Share via