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C6505

warning C6505: invalid annotation: MustCheck property may not be used on values of void type

This warning indicated that MustCheck property was used on a void data type. You cannot use MustCheck property on void type. Either remove the MustCheck property or use another data type.

The following code generates this warning:

// C
#include <CodeAnalysis\SourceAnnotations.h>
[returnvalue:SA_Post(MustCheck=SA_Yes)] void f();

// C++
#include <CodeAnalysis\SourceAnnotations.h>
using namespace vc_attributes;

[returnvalue:Post(MustCheck=Yes)] void f();

To correct this warning, use the following code:

// C
#include <CodeAnalysis\SourceAnnotations.h>
[returnvalue:SA_Post(MustCheck=SA_Yes)] char* f();

// C++
#include <CodeAnalysis\SourceAnnotations.h>
using namespace vc_attributes;

[returnvalue:Post(MustCheck=Yes)] char* f();

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