enableif-structure.md

description	title	ms.date	ms.topic	f1_keywords	helpviewer_keywords	ms.assetid
Learn more about: EnableIf Structure	EnableIf Structure	10/03/2018	reference	internal/Microsoft::WRL::Details::EnableIf	EnableIf structure	7825b283-e6b2-4f39-a4b9-c03bcd431b8e

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