description | title | ms.date | f1_keywords | helpviewer_keywords | ms.assetid | ||
---|---|---|---|---|---|---|---|
Learn more about: Compiler Warning (level 3) C4580 |
Compiler Warning (level 3) C4580 |
11/04/2016 |
|
|
fef6e8e0-0d6a-44fa-b22a-2fe7ba2ef379 |
[attribute] is deprecated; instead specify System::Attribute or Platform::Metadata as a base class
[attribute] is no longer the preferred syntax for creating user-defined attributes. For more information, see User-Defined Attributes. For CLR code, derive attributes from System::Attribute
. For Windows Runtime code, derive attributes from Platform::Metadata
.
The following sample generates C3454 and shows how to fix it.
// C4580.cpp
// compile with: /W3 /c /clr
[attribute] // C4580
public ref class Attr {
public:
int m_t;
};
public ref class Attr2 : System::Attribute {
public:
int m_t;
};