TBoundPointerProperty.operator==(_InterfacePtr) (Compact 2013)

[アーティクル]
04/19/2017

3/28/2014

The == overloaded operator determines whether a pointer that is contained in a TBoundPointerProperty<PropertyType> object and another pointer both point to an object located at the same address in memory.

Syntax

template<typename _InterfacePtr>
bool operator==(
_InterfacePtr p)

Parameters

p
[in] Pointer to compare with the pointer that is contained in the TBoundPointerProperty<PropertyType> object.

Return Value

Returns true if the two pointers point to an object at the same address in memory; otherwise, returns false.

Remarks

The _InterfacePtr type must inherit from IUnknown. To compare two pointers of the same type, the type of the pointer in the p parameter must be the type that you specified in the PropertyType template parameter of TBoundPointerProperty<PropertyType>.

If both pointers are Null pointers, the equality operator returns true.

When you use the == overloaded operator for a TBoundPointerProperty<PropertyType>, use the operator as a function and use the p parameter as the function’s argument instead of using it as an operand in a C++ expression. Otherwise, the Visual Studio compiler returns error code C2678 when you build your application.

Example

The following example code demonstrates one way to use the == overloaded operator.

Important

For readability, the following code example does not contain security checking or error handling. Do not use the following code in a production environment.

#include "XamlRuntime.h"
#include "XRPropertyBag.h"

#define CHK_BOOL(x) { \
    if (!(x)) { \
        ASSERT(!"Assertion failed"); \
        return E_FAIL; \
    }}

TBoundPointerProperty<IXREnumerable>* pValue1;
IXREnumerablePtr pValue2;

CHK_BOOL(pValue1->operator ==(pValue2));

Requirements

Header

XRPropertyBag.h

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