Condividi tramite


EnableIf Structure

 

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 EnableIf Structure.

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

Syntax

template <  
   bool b,  
   typename T = void  
>  
  
struct EnableIf;  
template <  
   typename T  
>  
struct EnableIf<true, T>;  

Parameters

T
A type.

b
A Boolean expression.

Remarks

Defines a data member of the type specified by the second template parameter if the first template parameter evaluates to true.

Members

Public Typedefs

Name Description
type If template parameter b evaluates to true, the partial specialization defines data member type to be of type T.

Inheritance Hierarchy

EnableIf

Requirements

Header: internal.h

Namespace: Microsoft::WRL::Details

See Also

Microsoft::WRL::Details Namespace